Sessions & Events


Known globally as the world’s gathering place for advancing concrete, the ACI Concrete Convention is dedicated to bringing together the international concrete community to improve the design, construction, maintenance, and repair of concrete projects. Attendees can experience dozens of technical and educational sessions that provide insight into the latest concrete innovations, research, and case studies.


Featured Sessions

Legal Issues in Concrete Construction—Lessons Learned

This session will bring together individuals with extensive experience in litigation related to concrete construction to share their experiences as lawyers, expert witnesses, and engineers through case studies and experience-based recommendations. Moderated by Jeff Coleman, with speakers Randy Poston, Bill Rushing, Matt D’Ambrosia, and Jeff Coleman. Monday, March 29, 2021 (11:00 AM - 1:30 PM).

The Concrete Industry in the Era of Artificial Intelligence

This session will provide insight on the merit of using artificial intelligence (AI) in the concrete industry with focus on how to better the performance of concrete materials at ambient and elevated temperatures and showcase the substantial potential of using AI to improve design of concrete structures under traditional and fire conditions. Moderated by M. Z. Naser, with speakers Henry Burton, Andrew Fahim, Pouria Ghods, Aali Alizadeh, Tahmid Medhi, Hayder Rasheed, Alaaeldin Abouelleil, Eric Fletcher, Emilio Taenqua, Liberato Ferrara, Ali Al-Obaidi, S. Gupta, and M. Z. Naser. Monday, March 29, 2021 (4:00 PM - 6:30 PM).

Adjusting Workability of Successful 3-D Concrete Printing

This two-part session will highlight the importance of controlling fresh-state properties for the successful execution of 3-D concrete printing. Moderated by Nicos Martys and Scott Jones, with speakers Mohamadreza Moini, Jan Olek, Pablo Zavattieri, Jeffrey Youngblood, Gaurav Sant, Jason Timmons, Iman Mehdipour, Shang Gao, Hakan Atahan, Narayanan Neithalath, Mathieu Bauchy, Edward Garboczi, Samanvaya Srivastava, Wilson Ricardo Leal da Silva, Thomas Andersen, Nicos Martys, Scott Jones, William George, Timothy Wangler, Robert Flatt, Peter Stynoski, Eric Kreiger, Megan Kreiger, Viktor Mechtcherine, Karthik Pattaje, Chuanyue Shen, David Lange, Lex Reiter, Sooraj Nair, Manu Santhanam, Gaurav Sant, Narayanan Neithalath, Mohammed Sonebi, M. Dedenis, Sofiane Amziane, Arnaud Perrot, Joseph Biernacki, Hajar Afarani, Edward Garboczi, Newell Moser, and Ebrahim Nasr-Esfahani. Part 1: Sunday, March 28, 2021 (10:00 AM - 12:30 PM). Part 2: Sunday, March 28, 2021 (1:00 PM - 3:30 PM).

Impact of Hot Weather Conditions on Concrete Repair

This two-part session will assist contractors, material suppliers, and specifiers with practical information that can be used for planning, constructing, and designing successful hot weather repair projects. Moderated by Mike Faubel and Tarek Khan. Part 1: Thursday, April 1, 2021 (10:00 AM - 12:30 PM). Part 2: Thursday, April 1, 2021 (1:00 PM - 3:30 PM)

Productivity in the Concrete Industry—Why Has it Stagnated and How Can ACI Help?

Productivity in the U.S. construction industry has been flat for 50 years, while productivity of U.S. industry in general has nearly doubled in that same time frame. Why? And what can ACI do about it? This session will explore answers to these and other questions and will include presentations from designers and contractors offering their perspectives on how ACI can help confront this very important industry issue. Moderated by Cary Kopczynski, with speakers Oscar Antommattei, Mike Schneider, Mario Garza, Mike Tholen, and Cary Kopczynski. Tuesday, March 30, 2021 (11:00 AM - 1:30 PM)


Session & Event times are listed in Eastern Daylight Time: EDT (UTC-4). All sessions & events are included in convention registration.

To access all committee meetings, sessions, and special events, please register for the convention. Once registered, you can access the web-based convention at http://crowd.cc/acis21 or by downloading the convention app on your mobile device.

Convention Highlights

April 1, 2021


10:00 AM - 12:00 PM

Moderator: Kurt D Smith

This two-part special session honors the many contributions made by Dr. Shiraz Tayabji to the American Concrete Institute and to the concrete pavement community as a whole. Dr. Tayabji is a long-time member of ACI, a Fellow, and a former chair of ACI 325, Concrete Pavements. To highlight the range of technical areas that Dr. Tayabji has contributed to throughout his distinguished career, this session includes presentations by prominent concrete pavement researchers and practitioners on important concrete materials, design, rehabilitation, and performance topics. The information presented in this session will be of interest to concrete materials engineers, pavement designers, and construction personnel.
Learning Objectives:
(1) Identify aspects of concrete pavement design and construction to which Dr. Tayabji has contributed;
(2) List important design and construction elements for highway and airport pavements;
(3) Describe the impacts of variability and human factors in concrete mix design, structural design, and construction;
(4) Compare theory versus reality in concrete airfield pavement engineering.

This session has been approved by AIA and ICC for 2 PDHs (0.2 CEUs). Please note: You must attend the live session for the entire duration to receive credit. On-demand sessions do not qualify for PDH/CEU credit.


10:00 AM - 12:30 PM

$0.00

Moderators: Tarek S Khan, Michael Faubel

Repairing concrete in hot weather requires planning to ensure a successful project. These sessions will assist contractors, material suppliers and specifiers with practical information on planning, constructing, and designing successful concrete repairs in hot weather.
Learning Objectives:
(1) Define hot weather conditions and planning concrete repairs in hot weather;
(2) Identify keys to material selection when planning hot weather concrete repair;
(3) Discuss curing and protecting concrete repairs in hot weather;
(4) Summarize testing protocols for concrete repairs in hot weather.

12:00pm - 12:30pm - Please join us after the session for a 30-minute open discussion period. Attendees will have the opportunity to talk freely and discuss with the speakers. Please note that this requires you to leave the session and join a new virtual link.

This session has been approved by AIA and ICC for 2 PDHs (0.2 CEUs). Please note: You must attend the live session for the entire duration to receive credit. On-demand sessions do not qualify for PDH/CEU credit.


10:00 AM - 12:00 PM

Moderators: Eric Kreiger, Narayanan Neithalath

The fabrication of novel reinforced concrete structures using digital technologies requires the definition of suitable strategies for reinforcement implementation. Reinforcement integration must be compatible with either the shape or the specific printing technique adopted for each structural element production. This session aims to provide the latest updates on opportunities and techniques using “reinforced concrete” for engineers, architects, and researchers actively involved in or simply interested in three-dimensional (3-D) printing with cementitious composites. These techniques have been developed to further expand the outreach of digitally fabricated concrete materials and structures.
Learning Objectives:
(1) Review the different proposed techniques to integrate reinforcement into 3-D printable/printed concrete and cementitious materials;
(2) Restate the development of 3-D printable fiber reinforced concrete mixtures;
(3) Describe peculiar performance to be monitored for printable reinforced concrete mixes and integrated reinforcement;
(4) Address structural design issues to be covered for 3-D printed reinforced concrete structures.

This session has been approved by AIA and ICC for 2 PDHs (0.2 CEUs). Please note: You must attend the live session for the entire duration to receive credit. On-demand sessions do not qualify for PDH/CEU credit.


1:00 PM - 3:00 PM

Moderator: Kurt D Smith

This two-part special session honors the many contributions made by Dr. Shiraz Tayabji to the American Concrete Institute and to the concrete pavement community as a whole. Dr. Tayabji is a long-time member of ACI, a Fellow, and a former chair of ACI 325, Concrete Pavements. This session includes presentations by prominent concrete pavement researchers and practitioners on important concrete materials, design, rehabilitation, and performance topics. The information presented in this session will be of interest to concrete materials engineers, pavement designers, and construction personnel.
Learning Objectives:
(1) Name important considerations for concrete materials durability in the design and construction of concrete pavements;
(2) Describe the evolution of precast concrete pavement construction and understand key aspects of its construction;
(3) Identify key design and construction factors for concrete overlays;
(4) Recognize recent innovations in the design and construction of continuously reinforced concrete pavements.

This session has been approved by AIA and ICC for 2 PDHs (0.2 CEUs). Please note: You must attend the live session for the entire duration to receive credit. On-demand sessions do not qualify for PDH/CEU credit.


1:00 PM - 3:30 PM

$0.00

Moderators: Michael Faubel, Tarek S Khan

Repairing concrete in hot weather requires planning to ensure a successful project. These sessions will assist contractors, material suppliers and specifiers with practical information on planning, constructing, and designing successful concrete repairs in hot weather.
Learning Objectives:
(1) Discuss techniques for controlling concrete temperatures;
(2) Review a case study using high early strength concrete mixtures for pavement repair;
(3) Review a case study repairing wind turbine foundations in hot weather conditions;
(4) Describe materials, methods, and technologies to make repair placements in hot weather successful.

3:00pm - 3:30pm - Please join us after the session for a 30-minute open discussion period. Attendees will have the opportunity to talk freely and discuss with the speakers. Please note that this requires you to leave the session and join a new virtual link.

This session has been approved by AIA and ICC for 2 PDHs (0.2 CEUs). Please note: You must attend the live session for the entire duration to receive credit. On-demand sessions do not qualify for PDH/CEU credit.


1:00 PM - 3:00 PM

Moderators: Kejin Wang, Kamal H Khayat

Ultra-high-performance concrete (UHPC) is attracting increasing interests worldwide due to its superior mechanical properties and excellent durability. However, the difficulties in handling of UHPC has been increasingly recognized as a major problem during construction because of a significant workability reduction due to very low water-binder ratio (w/b) and very high dosages of fine powders (for example, silica fume) and admixtures (for example, water-reducing admixtures) used. It is well understood that mixing methods and procedures have more substantial effects on workability of UHPC than on those of conventional concrete. Ultra high performance could not be achieved if required workability of UHPC is not met. The main objective of this technical session is to uphold a platform to discuss the issues, challenges, and recent advances in characterizing, controlling, and improving workability of UHPC. It is also to promote broader dialogue and greater interactions between UHPC researchers and users.
Learning Objectives:
(1) Discuss major issues related to workability of UHPC in construction;
(2) Evaluate workability of UHPC;
(3) Identify major factors (e. g., use of silica fume and superplasticizer, and mixing procedures) that influence workability of UHPC;
(4) Predict effects of workability on properties and performance of UHPC.

This session has been approved by AIA and ICC for 2 PDHs (0.2 CEUs). Please note: You must attend the live session for the entire duration to receive credit. On-demand sessions do not qualify for PDH/CEU credit.


4:00 PM - 6:00 PM

Moderator: Eamonn F Connolly

Constructability analysis of the structural systems is a key step in optimizing time, quality, and economic considerations of a project. Shotcrete construction practices and techniques are used to an advantage on multi story projects. This session looks to case studies, best practices, and material sciences for strategies to best achieve a building structure that meets the demanding requirements of the industry.
Learning Objectives:
(1) Identify structural framing systems and approaches to assessing the constructability advantages of these different systems;
(2) Discuss how shotcrete means, and methods provide a flexible alternate to traditional construction techniques. Case studies will present several of the shotcrete advantages in addressing challenging situations;
(3) Review a case study of an Up/Down Construction method of a multi-story structure which illustrates its constructability advantages of utilizing this method;
(4) Explain the subjectivity of constructability reviews which depend on the individual’s perception. The subjectivity of this service has different meanings to the Owner, Architect/Engineer and the Contractor causing confusion with the use of the term.

This session has been approved by AIA and ICC for 2 PDHs (0.2 CEUs). Please note: You must attend the live session for the entire duration to receive credit. On-demand sessions do not qualify for PDH/CEU credit.


4:00 PM - 6:00 PM

Moderator: H Celik Ozyildirim

Mixtures designated as self-consolidating concrete (SCC) may need a certain amount of consolidation to eliminate surface blemishes, to flow through congested areas, and to meet slump flow loss during construction. Care must be exercised in consolidating highly flowable mixtures such as semi SCC and SCC because they can lose stability. This session will address the consolidation needs of semi SCC and SCC and the effects of type and duration of vibration on the stability of these mixtures. There will be case studies and lessons learned. Researchers, engineers, contractors, and practitioners will benefit from the experience of the presenters.
Learning Objectives:
(1) Discuss the effects of vibration on concrete with various consistencies including SCC;
(2) Explain when and how to apply vibration to SCC mixtures;
(3) Discuss vibration of SCC for surface aesthetics;
(4) Discuss the consolidation of highly flowable fiber reinforced concretes (FRC).

This session has been approved by AIA and ICC for 2 PDHs (0.2 CEUs). Please note: You must attend the live session for the entire duration to receive credit. On-demand sessions do not qualify for PDH/CEU credit.


4:00 PM - 6:00 PM

Moderators: Jiong Hu, Kejin Wang

Ultra-high-performance concrete (UHPC) is attracting increasing interests worldwide due to its superior mechanical properties and excellent durability. However, the difficulties in handling of UHPC has been increasingly recognized as a major problem during construction because of a significant workability reduction due to very low water-binder ratio (w/b) and very high dosages of fine powders (for example, silica fume) and admixtures (for example, water-reducing admixtures) used. It is well understood that mixing methods and procedures have more substantial effects on workability of UHPC than on those of conventional concrete. Ultra high performance could not be achieved if required workability of UHPC is not met. The main objective of this technical session is to uphold a platform to discuss the issues, challenges, and recent advances in characterizing, controlling, and improving workability of UHPC. It is also to promote broader dialogue and greater interactions between UHPC researchers and users.
Learning Objectives:
(1) Define the parameters controlling workability of UHPC;
(2) Review recent advances in experimental characterization of workability of UHPC;
(3) Identify the challenges in the design and control of workability of UHPC;
(4) Address issues in design of UHPC for improved workability.

This session has been approved by AIA and ICC for 2 PDHs (0.2 CEUs). Please note: You must attend the live session for the entire duration to receive credit. On-demand sessions do not qualify for PDH/CEU credit.



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