Principal Investigator: Ceki Halmen - University of Missouri Kansas City
The objective of this study was to measure the variability of OCcrit data due to different sources of materials that meet the requirements of the same ASTM specifications. Cement and steel, each procured from three different manufacturers in different parts of the country, was tested in different a…
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Principal Investigator: Somayeh Nassiri - University of California Davis
The overarching objective of this study is to help overcome the barriers to the broad implementation of natural pozzolans as a partial replacement for portland cement in minor and major concrete mixtures used in paving. The approach developed is expected to be used nationally and internationally b…
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Principal Investigator: John Popovics - University of Illinois Urbana-Champaign
The objectives of this work are (i) to obtain a better understanding of dynamic tests (based on vibration and wave propagation) used to compute the dynamic Young’s Modulus (Ed) and to improve application by establishing consistent and accurate formulas to compute Ed and (ii) to better understand of…
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Principal Investigator: Kinsey Skillen - Texas A&M University
The proposed research will evaluate new protocols to characterize compressive strength of ultra-high performance concrete (UHPC) mixes applicable to field production. Currently, ASTM C1856/C1856M only allows the use of fixed-end grinding for cylinder end conditions, which requires costly grinding e…
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Principal Investigator: Lisa Burris - Ohio State University
This study focused on the viability of three agricultural materials to serve as low-cost supplementary cementitious materials to supplement the fly ash supply. In-depth characterization testing and performance testing were conducted to assess the potential and reactivity of these materials in cemen…
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Principal Investigator: Reza Kianoush - Ryerson University
Concrete Liquid Containing Structures (CLCS) are used for the treatment and/or storage of water, and wastewater, oil, as well as other types of liquid including chemicals. These structures are commonly known and referred to as storage tanks. The most common shapes of these structures are rectangula…
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Principal Investigator: Khaled Sennah - Toronto Metropolitan University
This project investigates the analysis and design of bridge deck slab overhang due to vehicle impact to concrete barriers. The first task in this project includes a parametric study using finite element modeling to determine the applied bending moment (M) and tensile force (T) on deck overhang for…
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Principal Investigator: John Wallace - University of California Los Angeles
The E-Defense shake table facility, the world’s largest three dimensional (3D) full-scale earthquake testing facility, was constructed by National Research Institute for Earth Science and Disaster Resilience (NIED) in 2005 in Miki, Japan. Since then, over 80 full-scale or large-scale experiments ar…
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Principal Investigator: Gustavo Parra-Montesinos - University of Michigan
In reinforced concrete construction, flat plate frame systems feature slabs supported directly by columns without the use of beams, drop panels, or column capitals. Flat plates are widely used and often preferred due to economical, functional, and architectural benefits. Some of these advantages in…
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Principal Investigator: Conrad Paulson - Wiss, Janney, Elstner Associates, Inc.
The purpose of this study was to determine if it would be appropriate to change the method required by the 2011 edition of ACI 318 “Building Code Requirements for Structural Concrete (ACI 318-11)” (the ACI Code) for measuring the yield strength of non-prestressed reinforcement without a well-define…
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Principal Investigator: Thomas Gernay - Johns Hopkins University
This proposal aims to complement the available design methods for concrete structural members exposed to standard fire by developing a method to design for resistance to full burnout under real fires. The novel method will provide enhanced safety and resilience for reinforced and prestressed concre…
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Principal Investigator: Christopher Motter - Washington State University
Reinforced concrete slab-column framing is commonly used to resist gravity loads in buildings. The slab-column connections must undergo lateral deformation induced from earthquakes and wind without two-way (i.e., punching) shear failure. Previous research has focused on behavior under seismic deman…
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Principal Investigator: Jack Moehle - University of California Berkeley
Foundation Report
The project Principal Investigator has been working with two practicing engineers (Rafael Sabelli
of Walter P. Moore and James Malley of Degenkolb Engineers), plus an expert on anchoring to
concrete (John Silva, HILTI) to develop a critical set of laboratory experiments to ex…
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Principal Investigator: Mahmoud Shakouri - Colorado State University
• In FA15 and FA30 pastes, a higher chloride disassociation was observed in NaCl solutions
than in CaCl2 and MgCl2.
• The results for SG25 and SG50 revealed that regardless of cation type, the inclusion of
higher slag increased the chloride binding and reduced the percentages of released bound…
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Principal Investigator: Chiara Ferraris - National Institute of Standards and Technology
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Principal Investigator: Matthew Sherman - Simpson Gumpertz & Heger Inc.
The interpretation of core test results from commercially produced high-strength concrete is an area of ongoing research. Experience with the application of acceptance criteria for normal strength cores to in situ high-strength concrete suggests significant differences in expected performance. Curi…
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Principal Investigator: Brock Hedegaard - Regents of the University of Minnesota
A new semi-empirical concrete shrinkage and creep model, called the CPRH Model, is proposed and calibrated. The new model proposes a coupling between autogenous and drying shrinkage using a volume-average pore relative humidity and treats drying creep as an additional stress-dependent shrinkage, li…
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Principal Investigator: Reza Kianoush - Ryerson University
The objective of the proposed research is to study the behaviour of concrete liquid containing structures (CLCS) with the aim to provide the necessary input for code decision-making. The major issues in the study are the development of cracks in the vulnerable regions of CLCS due to hydrostatic and…
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Principal Investigator: Negar Elhami-Khorasani - University at Buffalo
This project conducted experiments to investigate residual bond strength between rebar and concrete after exposure to high temperatures. Charts were developed to correlate section sizes and cover thickness in slabs, beams, and columns to the rebar temperature after exposure to different durations o…
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Principal Investigator: Matthew Yarnold - Texas A&M University
In summary, this study provided further insight into the in-service behavior of segmental concrete box girder bridges. The approach to identifying this in-service behavior was through an in-depth field evaluation of the SHSCB. The process began with a comprehensive review of the existing documentat…
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Principal Investigator: Jack Moehle - University of California Berkeley
A laboratory test and analytical research program was undertaken to characterize the
performance of reinforced concrete beams with high-strength reinforcement subjected to
reversed cyclic lateral loading simulating earthquake effects. The beams are representative of
beams used in special mome…
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Principal Investigator: Wassim Ghannoum - University of Texas Austin
Low-cycle fatigue tests were performed on reinforcing bars in order to assess the
acceptability of newly developed high-strength reinforcing bars in seismic applications.
The steels tested are classified as grade 60 A706, grade 80 A706, grade 80 A615, and
grade 100. The high-strength reinforc…
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Principal Investigator: Gustavo Parra-Montesinos - University of Wisconsin Madison
Precast, prestressed concrete hollow-core slabs are commonly used in residential, office and industrial construction because of their light weight, rapid construction, and large span-to-depth ratios. These structural members are typically manufactured using either an extrusion (e.g., Elematic) or a…
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Principal Investigator: Kimberly Kramer - KDK Engineering, LLC
ACI 551 wants to update the ten design examples in551.2R from the 318-11 reference to 318-19/24 and incorporate an additional two design examples for a more effective reference tool. Consistency and timeliness are the two most important aspects of updating the Design Guide Appendix in 551.2R, a pub…
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Principal Investigator: Wassim Ghannoum - University of Texas - San Antonio
Objectives
In ACI 318-19, a restriction was applied to mechanical splices for Gr80 and 100 bars in hinge regions due to performance concerns. This restriction puts Gr80 and 100 bars at a constructability disadvantage compared with Gr60 bars, while also curtailing constructability of concrete syste…
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Principal Investigator: Mehdi Khanzadeh Moradllo - Temple University
Curing is important to develop long-lasting durable concrete. Curing promotes hydration of the cement and reaction of the supplementary cementitious materials (SCMs) leading to improved strength and durability. Concrete specifications typically specify curing as a fixed duration of time (e.g., 14 d…
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Principal Investigator: Ben Amor - University of Sherbrooke
The comparability of environmental product declarations (EPDs) and the heterogeneity of their life cycle assessment (LCA) methods are considered the main challenges facing the credibility of results. The objective of this project is to promote the robustness and accuracy of the comparability in con…
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Principal Investigator: Charles Eastman - Georgia Institute of Technology
Many owners are requiring Building Information Modeling (BIM) in building contracts. Also, contractor qualification increasingly requires BIM capabilities. BIM products are gaining accepted use in the cast-in-place (CIP) concrete industry. In recent court cases, BIM has been considered as a standar…
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Principal Investigator: Robert Frosch - Purdue University
The objective of this project is to develop a design expression applicable for the development and splicing of high-strength reinforecment (with yield stress fy up to 100 ksi) which will be proposed for adoption by ACI 318.
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Principal Investigator: Jung Heum Yeon - Texas State University
In the first phase of this research project, a sophisticated numerical framework to simulate the effect of PCM on the time-dependent temperature and stress variations in a concrete slab was established using finite element modeling. A temperature-enthalpy curve was used to describe the latent-heat…
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Principal Investigator: Sergio F. Breña - University of Massachusetts Amherst
Over the past three decades the use of externally bonded fiber-reinforced polymer (FRP) materials for structural strengthening applications has become an accepted and widely used method. A primary concern of FRP structural strengthening systems is that FRP sheets may debonds from the concrete surfa…
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Principal Investigator: Gabriel Carrera - Wiss, Janney, Elstner Associates, Inc.
The American Concrete Institute (ACI) formed Innovation Task Group 93-12 Code Requirements for Construction of Additively Constructed Walls (ITG-12) to develop code requirements, design, and prescriptive provisions for additively constructed above-grade concrete walls for residential structures fo…
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Principal Investigator: Gustavo Parra-Montesinos - University of Wisconsin‐Madison
The design of mid‐ to high rise buildings in regions of high seismicity typically relies on the use of reinforced concrete structural walls for lateral strength and stiffness. To achieve adequate seismic performance, however, these walls often require intricate reinforcement detailing, particularly…
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Principal Investigator: Eric Jacques - Virginia Polytechnic Institute and State University
This report presents a summary of the “Development of FRP Retrofit Guidelines for Deficient
Reinforced Concrete Horizontal Lateral Force Resisting Systems” workshop held virtually on 17
August 2021. The meeting was a part of the research initiative led by Virginia Polytechnic Institute
and St…
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Principal Investigator: David Darwin - University of Kansas
Hooked and headed reinforcing bars are viable alternatives for development of reinforcing steel when member geometry does not allow for a straight deformed bar to fully develop its yield strength. Current design provisions in ACI 318-19 Building Code impose limitations on the use of hooked and head…
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Principal Investigator: Benoit Bissonnette - Université Laval
The aim of the concrete repair or overlay is to prolong the useful service life of the deteriorated/distressed structure or its element, to restore the load-carrying capacity and the stiffness, and to strengthen the structure or its member. Consequently, monolithic action in the composite repair st…
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Principal Investigator: Kevin MacDonald - Beton Consulting Engineers, LLC
The current requirements for ACI 306, both the specification and the guide, are based on data from the middle of the 20th century. The objective is to develop data using modern materials (high alite finely ground cement, pozzolans, admixtures) and more sustainable options than the current recommend…
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Principal Investigator: Sherif El-Tawil - University of Michigan
Ultra high performance concrete (UHPC) exhibits pseudo-ductility. Its tensile fracture strain (known as the crack localization strain, t,loc) is two orders of magnitude greater than that of regular concrete. Ironically, enhanced material ductility does not translate into structural ductility in rei…
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Principal Investigator: John Wallace - University of California Los Angeles
To assess the potential for collapse, a nonlinear model is created for each Archetype in an
open-source computational platform OpenSees (McKenna et al., 2000) and subjected to ground
acceleration response histories. New, state-of-the-art, approaches to predict collapse are
implemented and eva…
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Principal Investigator: Natassia Brenkus - Ohio State University
Pour-backs at post-tensioning (PT) tendons anchorage ends provide corrosion protection to the anchorage hardware, improving the durability of post-tensioned structures. However, the interface may serve as a pathway if deficiencies are present between the PT structure and the pour-back material, pro…
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Principal Investigator: Tony Nanni - University of Miami
Glass fiber reinforced polymer (GFRP) rebars have been used in concrete structures as a substitute
for steel rebars due to their non-corrosive behavior. To validate their performance in concrete
structures, it is important to understand their long-term durability. A collaborative study between…
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Principal Investigator: Gustavo Parra-Montesinos - University of Michigan
Results from seismic tests have indicated poor performance by slab-column connections reinforced with an orthogonal shear stud layout meeting the requirements of ACI 318-08. On the other hand, a recent monotonic punching shear test of a slab reinforced with a radial layout of shear studs suggest th…
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Principal Investigator: Jiong Hu - University of Nebraska Lincoln
Concrete waste contributes to the majority of 230-530 million tons of Construction and
Demolition wastes produced in the US each year, yet only a small proportion of which is recycled.
Recycling waste concrete and producing recycled concrete aggregate (RCA) is one of the crucial
topics in civ…
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Principal Investigator: Kathrina Simonen - Charles Pankow Foundation
The EC3 project provides open-source data and tools that enable design and construction teams to integrate EC into design and procurement decisions using an open database, intuitive user interface, and free tools to enable effective and broad adoption.
EC3’s goal is to be the most available, trans…
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Principal Investigator: Anca-Cristina Ferche - The University of Texas at Austin
Although significant progress has been made in understanding the causes of corrosion, there is a
scarcity of structural analysis models for quantifying the effects of corrosion on the residual
strength of reinforced concrete (RC) elements. In our current project, we developed a finite element…
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Principal Investigator: Farshad Rajabipour - Pennsylvania State University
Supplementary cementitious materials (SCM) are a key ingredient of today’s concrete and can vastly improve the durability (e.g., ASR mitigation) and sustainability of concrete mixtures. While the demand for fly ash (the highest used SCM) and other suitable pozzolans continues to grow, the supply of…
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Principal Investigator: Ward Malisch - American Society of Concrete Contractors
After ACI 347.3R-13-13, “Guide to Formed Concrete Surfaces,” was published in early
2014, a study was funded to evaluate and examine the Guide. A summary is provided
below.
• In a review of ACI 347.3R-13 similar to an ACI document review, the
investigators expressed concerns about the mixt…
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Principal Investigator: Karthik Obla - National Ready Mixed Concrete Association
The measured acid-soluble, water-soluble chloride contents and the calculated total chloride contents were determined for a range of concrete mixtures consisting of different SCMs, portland cement C3A content, w/cm, and aggregate types. The test data gave various conclusions which are detailed in t…
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Principal Investigator: Bahram Shahrooz - University of Cincinnati
Shahrooz
Coupled structural (shear) walls (CSW) are a common structural system. This system is comprised of two or more structural walls that are linked, typically, at each floor by coupling beams. Based on the expected level of inelastic deformations, composite structural (shear) walls can be cla…
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Principal Investigator: Matthew Gombeda - Illinois Institute of Technology
This project focused on the development and subsequent demonstration of a framework for producing and characterizing concrete mix designs driven by high-early flexural strength performance. The multi-institution project began with a thorough review of existing literature on tensile/flexural strengt…
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Principal Investigator: Gustavo Parra-Montesinos - University of Wisconsin Madison
Past experimental research (Setkit, 2012; Parra-Montesinos et al., 2014), showed that the use of tensile strain hardening fiber reinforced concrete (FRC) in coupling beams with span-to-depth ratio of 2.2 or greater allowed the elimination of diagonal reinforcement while ensuring adequate shear stre…
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Principal Investigator: Reza Kianoush - Ryerson University
A finite element approach was employed along with nonlinear static analysis in order to investigate the effect of axial compression on shear strength as well as the effect of wall opening on the seismic response characteristics of reinforced concrete pedestals in elevated water tanks. Seismic perfo…
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Principal Investigator: Mehdi Khanzadeh Moradllo - Temple University
Fulfillment and distribution centers are becoming a sizable concrete construction sector. As society navigates post-pandemic, many online retailers are expecting to increase their physical footprint. At the same time, to respond to the threat of climate change, concrete industry is looking for appr…
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Principal Investigator: James Wight - University of Michigan
The proposed project is aimed at evaluating the adequacy of the strength factors for concrete struts given in Appendix A of the 2002 ACI Code. In particular, this research project will experimentally evaluate the ultimate capacity of compression struts in deep concrete beams with minimum transverse…
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Principal Investigator: Sriram Aaleti - University of Alabama
This proposed research addresses the implications of recent modifications in the ACI 318-19 Code on precast shear walls, with a specific focus on special structural walls located in seismic regions. These code changes necessitate increased dimensions and weight, and detailing requirements, impactin…
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Principal Investigator: Christina Carloni - Case Western Reserve University
For FRP reinforcement to become widely adopted in both the engineering and construction industries, several design parameters need to be well understood. Although there are currently design guidelines available for FRP bars there are still several limitations that have yet to be fully resolved. One…
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Principal Investigator: Jack Moehle - University of California Berkeley
Charles Pankow Foundation (CPF) has led a coordinated research program to advance the use of high-strength reinforcement in buildings assigned to all Seismic Design Categories. The CPF program has addressed the market for high-strength reinforcement, mechanical properties of high-strength reinforce…
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Principal Investigator: Shih-Ho Chao - University of Texas Arlington
Tests were carried out on a series of double-beam coupling beams (DBCBs), including two full-scale DBCBs and one half-scale DBCB. The beams had aspect ratios (beam span/beam depth, ln/h) of either 2.4 or 3.2 and were tested with or without a slab. These specimens were tested to study the seismic be…
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Principal Investigator: James Toscas - Toscas Group
To create an industry-wide survey to gather opinions on the needs and expectations of ACI and its documents as well as satisfaction with and improvements of ACI documents. Task 1 - was funding of a white paper.
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Principal Investigator: Matthew Adams - New Jersey Institute of Technology
modulus) have shown excellent agreements in comparison with the existing database
analysis prepared for compressive strength and elastic modulus. Future iterations of
these statistical analyses can be made with an expanded database as more information
is available through continued research.…
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Principal Investigator: Amanda Bordelon - Utah Valley University
The objective of this research was to quantify the benefits of silica fume through a detailed
investigation of the concrete decks within the now-demolished Salt Lake City International
Airport parking structure, which was constructed in 1991, after it had been in service for almost
30 years.…
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Principal Investigator: Andres Lepage - University of Kansas
Reinforced concrete (RC) walls are commonly used as the primary lateral-force-resisting system for buildings in regions of high-seismicity due to their high lateral strength and stiffness. However, construction can be difficult in structures designed for earthquake resistance because of the heavy l…
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Principal Investigator: Dimitri Feys - Curators of the University of Missouri on behalf of Missouri University of Science and Technology
Specimens to test concrete strength in accordance with ASTM C39 are to be produced and consolidated according to ASTM C31. The current procedure for consolidating cylinders requires vibration if the slump of the concrete is lower than one inch and an option to either vibrate or rod when the slump i…
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Principal Investigator: Paolo Martino Calvi - University of Washington
Shear friction is used to transfer shear forces between two reinforced concrete members or two members with dissimilar materials. Shear transfer across a plane represents a complex phenomenon that depends on the interactions between several variables, such as concrete surface condition and cohesion…
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Principal Investigator: Robert J. Frosch - Purdue University
With the availability of higher strength concrete and higher strength reinforcement, the use of reduced column cross-sections is possible. However, as the cross-section is reduced, slenderness effects become more significant and can control design of the column. The current slenderness provisions i…
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Principal Investigator: Matthew P. Adams - New Jersey Institute of Technology
This project has three main objectives:
1. Determine key indicators for predicting global warming potential (GWP) of concrete
mixtures - based on concrete mixture performance and design criteria.
2. Develop protocols for completing global warming potential benchmarking.
3. Develop a guidance d…
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Principal Investigator: Hamed Ebrahimian - University of Nevada Reno
The industry currently lacks proper engineering design guidance to safeguard the stability of the rebar cages in the construction stage. This is a critical shortcoming that has motivated a research project at the University of Nevada, Reno, in collaboration with ASCE Construction Institute, Charles…
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Principal Investigator: Nabil Grace - Lawrence Technological University
The flexural behavior of box beam bridge systems prestressed and reinforced with carbon fiber composite cables (CFCC) is presented here. Three box beam bridge models, BBC-I, BBC-II, and BBC-III, were designed, constructed, instrumented, and tested to failure. The three bridge models were of the sam…
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Principal Investigator: Shiho Kawashima - Columbia University
In typical placement processes, concrete is subjected to shear and then left to set at rest. While under shear, during processes such as pumping, pouring, and spraying, the material experiences structural breakdown as the particles in the system deflocculate, translating to a decrease in viscosity.…
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Principal Investigator: Shamim Rashid-Sumar - National Ready-Mix Concrete Association
The National Ready Mixed Concrete Association (NRMCA) and the Insulating Concrete Forms Manufacturers Association (ICFMA) have committed to a joint research project with Jensen Hughes to test ICF flat walls to NFPA 285 requirements, and further determine required construction details to successful…
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Principal Investigator: Jeff West - Wiss, Janney, Elstner Associates, Inc.
This project comprised two phases to investigate the bond of composite concrete-to-concrete interfaces. Phase 1 included 20 composite slabs with a series of direct shear and direct tensile bond tests. Within this phase, the use of the guillotine shear test method was explored while testing various…
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Principal Investigator: John Gardner - University of Ottawa
The costs of vertical forms systems, walls, and columns are directly related to the maximum pressure exerted by the fresh concrete during the placing process. Formwork for conventional concrete is designed for a lateral pressure envelope that is hydrostatic from the free surface of the concrete to…
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Principal Investigator: Stephanie Paal - Texas A&M University
The primary objective of this project is to determine the capacity for advanced data-driven techniques to expedite our understanding of novel concrete mix designs or new mix design constraints so that we can reduce our reliance on physical testing, work towards more sustainable concrete mixes, and…
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Principal Investigator: Tracy Marcotte - CVM Engineers, Inc.
Durability design, as a framework for the construction of building structures to achieve an intentionally
specified service life, is not well understood or comprehensively documented within the guides, standards
and Codes developed by ACI. Globally, ACI 318 is the most commonly used code for de…
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Principal Investigator: Tatjana Jevremovic - University of Utah
Upon decommissioning of nuclear power plants, a large volume of concrete and reinforcing steel bars must be disposed as low-level radioactive waste mounting to more than 4,400 tones per single nuclear power plant. There are in total only three low level radioactive waste disposals in USA. Since rei…
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Principal Investigator: Yi Shao - McGill University
Ultra-high performance concrete (UHPC) is an advanced class of concrete materials. Relative to conventional concrete, UHPC shows superior mechanical and durability performance. Therefore, UHPC has been increasingly adopted worldwide from retrofitting existing structures to construction new structur…
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Principal Investigator: Alexander Brand - Virginia Tech
Certain iron sulfide minerals found in the rocks and sand used to build concrete foundations in Connecticut and Massachusetts have undergone an expansive reaction, resulting in significant economic costs and litigation for repair. This study investigates the rate and extent of those reactions in or…
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Principal Investigator: Dimitri Feys - Missouri S&T
The purpose of this research was to develop a critical set of laboratory experiments to explore the requirements for anchoring steel columns to concrete foundations. Testing consisted of punching shear and breakout failure, moment transfer tests, and analysis by finite element models followed by la…
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Principal Investigator: Aaron Sakulich - Worcester Polytechnic Institute
This experimental study aimed to investigate an innovative cinnamaldehyde-LWA inhibitor that can be added to a cementitious mix in order to protect reinforcing steel from corrosion. By protecting the reinforcing steel, the service life of structures can be extended and the billions of dollars lost…
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Principal Investigator: Sergio F. Breña - University of Massachusetts Amherst
Poorly detailed columns are prone to axial load failures or shear failures in active seismic areas around the world. Structures designed using older (pre-1970) code provisions may be susceptible to severe seismic damage. The research in this report concentrated on retrofitting deficient RC columns…
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Principal Investigator: Xijun Shi - Texas State University
This research investigated the feasibility of using a combination of RSF and MSF in concrete for pavement overlay applications. Various concrete mixtures incorporating different combinations of RSF and MSF were examined for fresh properties, strengths, modulus of elasticity, ductility, toughness, f…
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Principal Investigator: Panagiotis Danoglidis - University of Texas Arlington
The National Ready Mixed Concrete Association (NRMCA) and the Insulating Concrete Forms Manufacturers Association (ICFMA) have committed to a joint research project with Jensen Hughes to test ICF flat walls to NFPA 285 requirements, and further determine required construction details to successfull…
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Principal Investigator: Charles Eastman - Georgia Institute of Technology
This project is an effort to realize interoperability standards for reinforced concrete construction in buildings. The process for developing such standards is defined in the US National BIM Standard (NBIMS) (see: http://www.wbdg.org/bim/nbims.php). The ACI project is structured into three phases.…
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Principal Investigator: Christopher Motter - Washington State University
A database of diagonally reinforced concrete coupling beam tests was formulated and used to assess strength, stiffness, and deformation capacity. The shear strength equation provided in ACI 318-19 considers only the transverse strength of the diagonal bars and was found to be overly conservative. A…
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Principal Investigator: Bahram Shahrooz - University of Cincinnati
Advancements in steel reinforcement bending machines have allowed for the fabrication of
continuously wound ties (CWTs), which are constructed from a single piece of reinforcement.
CWTs are being used in place of conventional transverse reinforcement in concrete compression
members to reduce…
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Principal Investigator: Christopher Jones - Kansas State University
The research proposed herein describes a subset of a larger research and development effort for novel concrete containments for commercial nuclear reactors. The broader research is proposed in four phases:
1. Preliminary engineering concept feasibility
2. Detailed technical evaluation and laborat…
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Principal Investigator: Emilio Garcia-Taengua - University of Leeds
A database of SFRC mixtures and a database of synthetic FRC mixtures have been compiled from papers published over the last two decades and used as the basis for this study. The information compiled on SFRC mixtures constitutes a coherent set of data where the main sources of variability are clear,…
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Principal Investigator: John Wallace - University of California Los Angeles
Unlike seismic design, where performance-based design has become common in areas with high seismic hazards, wind design is still based on prescriptive code provisions and linear elastic response under ASCE 7 strength-level demands. In some locations, use of prescriptive wind design provisions leads…
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Principal Investigator: Charles Eastman - Georgia Institute of Technology
This project was initiated by the Charles Pankow Foundation, with industry support from the Precast Concrete Institute (PCI) in May 2008. It has been carried out in three phases. In the first phase, the PCI BIM Committee, was formed. The Committee defined the scope of coverage, and identified 51 da…
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Principal Investigator: Don Scott - SEI/ASCE
Prestandard for Performance-Based Wind Design developed by the Structural Engineering Institute (SEI) of the American Society of Civil Engineers (ASCE) presents a recommended alternative to the prescriptive procedures for wind design of buildings contained in the nationally adopted standard Minimum…
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Principal Investigator: Conrad Paulson - Wiss, Janney, Elstner Associates, Inc.
As the primary activity funded by a research grant from the Charles Pankow Foundation (CPF), Wiss,
Janney, Elstner Associates, Inc. (WJE) developed a complete draft of a proposed manufacturing
specification for deformed steel reinforcing bars with controlled ductile properties having specified…
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Principal Investigator: Doug Hooton - University of Toronto
The current state of knowledge indicates that the mechanical properties and durability performance of concrete incorporating supplementary cementing materials (SCMs) as partial replacement for portland cement are generally comparable to those of conventional ordinary portland cement (ope) concrete,…
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Principal Investigator: Jason Ideker - Oregon State University
The concrete design and construction industry needs uniform guidance on durability recommendations across ACI documents. As part of the preparation for this proposal, five ACI documents, where discrepancies exist, were examined: ACI 201.2R-16, 222R-19, 301-16, 301-16, 318-19, 350.5-12, and 350-06 […
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Principal Investigator: Andres LePage - University of Kansas
The use of high-strength steel bars in reinforced concrete coupling beams is expected to reduce reinforcement congestion. A series of tests was conducted to investigate the effects of high-strength reinforcement on coupling beam behavior. This document summarizes the test program and test data. Ele…
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Principal Investigator: Robert Barnes - Auburn University
A reliability-based calibration of a strength reduction factor for one-way shear strength limit state was not justifiable in the past because of well-founded concerns about the level of safety associated with the ACI 318 traditional one-way shear strength expressions—particularly for large and ligh…
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Principal Investigator: April Snyder - RJ Lee Group
This project addresses a need for standardized methods to measure the total quantity and species (sulfate vs. sulfide) of sulfur in concrete aggregates that can be used by numerous analytical laboratories with reliable results. Rigorous laboratory protocols will be applied to evaluate sample prepar…
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Principal Investigator: Chengcheng Tao - Purdue University
The objective of the proposed research is to develop a novel framework to select nano-additives for optimal rheological behavior of fresh concrete by integrating nanotechnology, multi-scale modeling, fluid mechanics, and data-driven approaches. To achieve the research objective, we will: 1) develop…
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Principal Investigator: Raissa Ferron - University of Texas Austin
The overarching goal of this project was to advance the understanding on how microbial-induced calcium carbonate precipitation can be leveraged to improve the durability of concrete. The specific objective of this project was to determine the efficacy of biogenic calcium carbonate precipitation to…
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Principal Investigator: Peter H. Billberg - Swedish Cement and Concrete Research Institute
The objective of this work is to evaluate all of the recently developed models across the world for predicting the lateral formwork pressure when casting vertical structures with self-consolidating concrete (SCC). This evaluation will be done in the form of a round-robin test series where all repre…
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Principal Investigator: Ashley Thrall - University of Notre Dame
This report presents the experimentally investigation of the behavior of square reinforced concrete (RC) columns
with high-strength [100 ksi (690 MPa) yield strength] steel coiled strips as embedded confinement reinforcement
under reversed-cyclic lateral loading and a constant axial compression…
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Principal Investigator: Robin Tuchscherer - Northern Arizona University
This purpose of this project is to investigate the serviceability behavior of discontinuity regions using the strut and tie modeling method. To accomplish this objective, the following aims are targeted:(1) to investigate the serviceability behavior of concrete in terms of maximum crack width and t…
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Principal Investigator: Wassim Ghannoum - University of Texas Austin
The reinforcing steel industry is currently developing high-strength Reinforcing bars with specified yield strengths of 80 and 100 ksi due to increased demand for such grades in concrete construction. However, none of the higher street grades are able to match the benchmark mechanical properties of…
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Principal Investigator: Travis Thonstad - University of Washington
This research program investigated the combined use of deformed bar reinforcement and distributed macro-synthetic fibers to resist shear forces. The purpose of the experimental campaign was to investigate the use of fiber volume fractions, transverse reinforcement ratios, and concrete mixture des…
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Principal Investigator: Dimitrios Kalliontzis - University of Houston
The goal of the proposed research is to understand the effects of axial loads on the shear response of UHPC members and to assist in the development of UHPC shear resistance models considering these effects. The proposed research will utilize the unique capabilities of the Universal Panel Tester at…
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Principal Investigator: Leslie Sneed - Missouri S&T
This report presents the results from the second phase of an ongoing investigation of the direct shear transfer across an interface of lightweight aggregate concretes. The lightweight concretes were made with different lightweight aggregate materials (expanded shale, expanded slate, and expanded cl…
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Principal Investigator: Ceki Halmen - University of Missouri Kansas City
The Clcrit data published in the literature exhibits significant scater and varies between ~0.1 and 3.1% by weight of cement. An important factor for this variability was believed to be due to the lack of a standard test method. To address this issue, the ACI 222 commitee established a task group,…
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Principal Investigator: Min-Yuan Cheng - National Taiwan University of Science and Technology
Effects of slab flexural reinforcement on the punching shear strength and deformation capacity
of corner slab-column connections without shear reinforcement are evaluated in this study. Six
isolated corner slab-column subassemblages were tested under combined gravity-type loading
and lateral…
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Principal Investigator: Andrzej Nowak - Auburn University
Plain concrete is used for various structural elements that contain no reinforcement or less reinforcement than specified by the American Concrete Institute (ACI) Building Code. There have been significant developments in the concrete industry and a continuous growing interest in structural plain c…
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Principal Investigator: Cameron Murray - University of Arkansas
The current edition of the ACI 318-19(22) Building Code Requirements for Structural
Concrete and Commentary allows the use of alternative cements in design when these materials
can be proved to conform to the existing structural design parameters used to estimate
performance. Belitic calcium…
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Principal Investigator: David Corr - Northwestern University
Although interrupted and altered by COVID and other related factors, the present study has expanded the body of knowledge of nanomodification of cementitious composites, particularly related to dispersion of nanomaterials, and nano/microscale creep behavior. The specific findings of this study incl…
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Principal Investigator: Narayanan Neithalath - Arizona State University
An understanding of the mechanical response of pervious concretes as a function of material design and pore structure parameters is essential for effective utilization of this material. A methodology to proportion pervious concrete mixtures of desired porosity using high or low cement paste content…
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Principal Investigator: Mohamed Moustafa - University of Nevada Reno
Ultra-high-performance concrete (UHPC) is considered to be a relatively new generation of cementitious materials with multiple times higher strength and durability than conventional concretes. The global market size of UHPC is increasing exponentially and is expected to reach USD 1.9 billion by 202…
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Principal Investigator: Rudolf Seracino - North Carolina State University
This proposed research focuses on developing design requirements for disturbed regions of structural concrete members reinforced with internal FRP bars. In the design of RC deep beams, the use of sectional design methods may result in unnecessarily conservative designs. The application of strut-and…
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Principal Investigator: Luis Fargier-Gabaldon - University of Notre Dame
Report 1
This research addresses the sizing of the stem in cantilever retaining walls. The new shear provisions for members without shear reinforcement that were recently introduced into the ACI Building Code (318-19), produce stems that can be up to 4 times thicker than that obtained with previou…
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Principal Investigator: Antonio Nanni - University of Miami
The research project “SEACON: Sustainable concrete using seawater, salt-contaminated aggregates,
and non-corrosive reinforcement” addresses the issue of sustainability from the perspective of the
construction material most used worldwide. This 2.5-year project started on October 1, 2015. It was…
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Principal Investigator: Gustavo Parra-Montesinos - University of Wisconsin Madison
The proposal relates to 318 moving forward with several code change proposals for bar group concrete breakout failure. One of the 318 code change proposals is to clarify the language regarding anchorage and development length on joints, including column-footing joints. 3181R has developed language…
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Principal Investigator: Mahmoud Shakouri - Colorado State University
This proposed 18-month project has been endorsed by ACI Committees 222: Corrosion of Metals in Concrete and 365: Service Life Prediction and is asking for $86,685. The amount of direct costs requested from CRC is $57,365. The cost share for this project totals $16,100 and is in the form of tuition…
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Principal Investigator: Francisco Lo Monte - Politecnico di Milano
The great benefits brought in by FRC and UHPFRC do not consist only of the remarkably higher tensile strength at the Ultimate Limit State (ULS) with respect to ordinary concrete, but especially on the better performance at the Service Limit State (SLS), this leading to longer lasting and more susta…
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Principal Investigator: Somayeh Nassiri - Washington State University
Pervious concrete (PC) is a special class of concrete with about 15 to 30 percent volume of
interconnected voids to allow runoff to infiltrate into underlayers. A successful PC pavement
provides the support to withstand the applied traffic load and provide rapid infiltration of
stormwater to…
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Principal Investigator: Mohamed Moustafa - University of Nevada Reno
Advanced materials, such as ultra-high performance concrete (UHPC), are among the emerging technologies that can revolutionize our future structures with significantly improved strength and durability for a much longer service life than conventional concrete. Behind the excellent performance of UHP…
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Principal Investigator: Jack Moehle - University of California Berkeley
Reinforced concrete special moment resisting frames (SMRFs) are a common lateral force resisting system in regions of high seismicity. For tall reinforced concrete SMRF systems, beam cross sections with depth as large as 4 feet are common. For such beam sections the current ACI 318-08 requirements…
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Principal Investigator: Yi Shao - McGill University
Through fourteen eccentric compression tests of large-scale UHPC specimens, the proposed project will investigate the compressive behavior of UHPC in flexural compression zones as well as develop practical design guidance. The design guidance will include a UHPC compressive material model and compr…
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Principal Investigator: Jack Moehle - University of California Berkeley
These Seismic Design Guidelines for Tall Buildings present a recommended alternative to the
prescriptive procedures for seismic design of buildings contained in the ASCE 7 standard and
the International Building Code (IBC). The intended audience includes structural engineers and
building offi…
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Principal Investigator: Ward Malisch - American Society of Concrete Contractors Foundation
The objective of this project is development of a Users’ Guide to “Green” Concrete in Building Construction. Such a guide will help all members of the construction team to (a) understand the differences in properties between “green” concrete and traditional concrete mixtures for building constructi…
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Principal Investigator: Bill Palmer - Complete Construction Consultants
To summarize the industry's challenges as identified by Concrete 2029 participants and to clearly define the goals established and steps that must be taken for the industry to accomplish those goals.
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