In today’s market, it is imperative to be knowledgeable and have an edge over the competition. ACI members have it…they are engaged, informed, and stay up to date by taking advantage of benefits that ACI membership provides them.
Read more about membership
Become an ACI Member
Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design, construction, and materials, who share a commitment to pursuing the best use of concrete.
ACI World Headquarters
38800 Country Club Dr.
Farmington Hills, MI
ACI Middle East Regional Office
Second Floor, Office #207
The Offices 2 Building, One Central
Dubai World Trade Center Complex
Phone: +971.4.516.3208 & 3209
ACI Resource CenterSouthern California
Feedback via Email
Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Showing 1-5 of 1000 Abstracts search results
April 22, 2021
Marta Roig-Flores, Eduardo J. Mezquida-Alcaraz, Ariel A. Bretón-Rodríguez, Juan Navarro-Gregori and Pedro Serna
Ultra-High-Performance Fiber-Reinforced Concrete (UHPFRC) is a type of concrete with superior mechanical and durability properties, which might be improved even further with the addition of nano-materials. This work studies the influence of adding nano-additions to two UHPFRCs with compressive strength around 150MPa (21755 psi), with and without crystalline admixtures. Two nano-materials were considered: cellulose nano-crystals (4-5 nm diameter, 50–500 nm length, 0.157-0.197 μin diameter, 1.97-19.7 μin length); in a dosage up to 0.15% by the cement weight; and aluminum oxide nanofibers (diameter 4-11nm, length 100-900nm, 0.157-0.433 μin diameter, 3.94-35.4 μin length) in a dosage of 0.25% by the cement weight. Water content of the mixes with nanomaterials was modified to maintain workability in a similar range aiming to maintain the self-compacting behavior. The following properties were analyzed: workability, compressive strength, modulus of elasticity and tensile properties calculated through a simplified inverse analysis after performing four-point bending tests. The study considered the effect of using three levels of mixing energy to ensure a proper dispersion of all the components, and its effect in the aforementioned properties. The results show a potential effect of these nanomaterials as nanoreinforcement,
with slightly better ultimate strength and strain values for the higher energy level.
March 15, 2021
Sponsors: Sponsored by ACI 370 Committee
Editors: Eric Jacques and Mi G. Chorzepa
This Symposium Volume reports on the latest developments in the field of high strain rate mechanics and behavior of concrete subject to impact loads. This effort supports the mission of ACI Committee 370 “Blast and Impact Load Effects” to develop and disseminate information on the design of concrete structures subjected to impact, as well as blast and other short-duration dynamic loads. Concrete structures can potentially be exposed to accidental and malicious impact loads during their lifetimes, including those caused by ballistic projectiles, vehicular collision, impact of debris set in motion after an explosion, falling objects during construction and floating objects during tsunamis and storm surges. Assessing the performance of concrete structures to implement cost-effective and structurally-efficient protective measures against these extreme impacting loads necessitates a fundamental understanding of the high strain rate behavior of the constituent materials and of the characteristics of the local response modes activated during the event.
This volume presents fourteen papers which provide the reader with deep insight into the state-of-the-art experimental research and cutting-edge computational approaches for concrete materials and structures subject to impact loading. Invited contributions were received from international experts from Australia, Canada, China, Czech Republic, Germany, South Korea, Switzerland, and the United States. The technical papers cover a range of cementitious materials, including high strength and ultra-high strength materials, reactive powder concrete, fiber-reinforced concrete, and externally bonded cementitious layers and other coatings. The papers were to be presented during two technical sessions scheduled for the ACI Spring 2020 Convention in Rosemont, Illinois, but the worldwide COVID-19 pandemic disrupted
The editors thank the authors for their outstanding efforts to showcase their most current research work with the concrete community, and for their assistance, cooperation, and valuable contributions throughout the entire publication process. The editors also thank the members of ACI Committee 370, the reviewers, and the ACI staff for their generous support and encouragement throughout the preparation of this volume.
March 9, 2021
Sponsored by ACI Committee 345
A Sustainable built-environment requires a comprehensive process from material selection through to reliable management. Although traditional materials and methods still dominate the design and construction of our civil infrastructure, nonconventional reinforcing and strengthening methods for concrete bridges and structures can address the functional and economic challenges facing modern society. The use of advanced materials, such as fiber reinforced polymer (FRP) and ultra-high performance concrete (UHPC), alleviates the unfavorable aspects of every-day practices, offers many new opportunities, and promotes strategies that will be cost-effective, durable, and readily maintainable. Field demonstration is imperative to validate the innovative concepts and findings of laboratory research. Furthermore, documented case studies add value to the evaluation of emerging and maturing technologies, identify successful applications or aspects needing refinement, and ultimately inspire future endeavors. This Special Publication (SP) contains nine papers selected from three technical sessions held during the virtual ACI Fall Convention of October 2020. The first and second series of papers discuss retrofit and strengthening of super- and substructure members with a variety of techniques; and the remaining papers address new construction of bridges with internal FRP reinforcing and prestressing in beam, slabs, decks and retaining walls. All manuscripts were reviewed by at least two experts in accordance with the ACI publication policy. The Editors wish to thank all contributing authors and anonymous reviewers for their rigorous efforts. The Editors also gratefully acknowledge Ms. Barbara Coleman at ACI for her knowledgeable guidance.
March 1, 2021
Seong Ryong Ahn and Thomas H.-K. Kang
Impact resistance of concrete panels has been researched since the 19th century. Studies therein primarily
focused on conventionally reinforced concrete and steel fiber-reinforced concrete. Little research on the impact
resistance of prestressed concrete exists. This paper investigated the impact resistance of prestressed concrete panels
subject to hard and soft/hollow projectiles and under an assortment of prestressing levels. Damage mode, velocity
change, impact force, and internal energy were measured and analyzed. A total of twelve finite element analyses,
which considered high strain rate effects, were performed, as well as preliminary analyses with different mesh sizes.
It is observed that level of prestressing tends to improve perforation resistance of concrete panels. Additionally,
large deformation at soft projectiles occurred during impact, consuming the greater internal energy of the projectiles,
unlike hard projectiles. As a result, soft projectiles caused a smaller degree of local failure on the concrete panels
than hard projectiles with the same mass and velocity.
Victor Lopez, Mi G. Chorzepa, and Stephan A. Durham
This paper presents the drop-weight impact performance of recycled tire chip and fiber-reinforced
cementitious composites. Emphasis is placed on maximizing the energy dissipation capacity of rubberized fiber
reinforced concrete (FRC) mixtures subjected to impact forces for the purpose of improving the impact resilience of
concrete elements such as concrete traffic barriers and other applications. The first part of this study involved smallscale
testing of preliminary mixtures to optimize compressive strength, modulus of rupture, and impact resilience
using a fixed percentage of tire chip replacement of the coarse aggregate and varying volume fractions of steel,
polypropylene, and polyvinyl alcohol fibers. Rubberized FRC beams were then tested under static loads to maximize
the static energy dissipation potential of steel fiber inclusion at varying tensile steel reinforcement ratios. The final
part of this study involved performing scaled drop-weight impact tests on reinforced concrete beam. Results confirmed
that rubberized and/or fiber reinforced cementitious composite members exhibit significantly improved energy
dissipation capacity and impact resilience, particularly with 1.0% steel fiber addition and 20% tire chip replacement.
It was observed that more energy was dissipated through the steel fiber addition alone than FRC mixtures with the tire
Results Per Page
Please enter this 5 digit unlock code on the web page.