Sessions & Events

 

All sessions and events take place in Central Daylight Time (CDT).
All events take place at the Hyatt Regency New Orleans.

On-demand sessions will be available for viewing in the convention platform/event app under "On-Demand Content" within 24-48 hours of the session premiere. Please note, on-demand sessions are not available for CEU credit. *Denotes on-demand content.


A Look at Low-Carbon Cement and Concrete in the Construction Industry

Wednesday, March 27, 2024  8:30 AM - 10:30 AM, Strand 11B

This session is sponsored by NEU: an ACI Center of Excellence for Carbon Neutral Concrete. The session will provide information on existing and new materials and technologies that have shown strong potential to play a significant role in CO2 emissions reductions in the concrete industry and considerations for the wise use of materials and design aspects towards reducing CO2 emissions in concrete construction. This session will be geared toward all stakeholders, researchers, and students in the concrete industry.

Learning Objectives:
(1) Identify low-carbon concrete materials and technologies and the importance of validation/verification of new materials and technologies;
(2) Demonstrate low-carbon concrete applications;
(3) Discuss the importance of accurate quantification of material properties to reduce the GWP of Concrete;
(4) Discuss the importance of appropriate transition design towards carbon neutral concrete.

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.


Update on NEU

Presented By: Dean Frank
Affiliation: NEU - An ACI Center of Excellence For Carbon Neutr
Description: This presentation will provide a brief update on current projects being coordinated by NEU: An ACI Center of Excellence for Carbon Neutral Concrete, which was established by the American Concrete Institute to collaborate globally to drive education, awareness, and adoption of the use of carbon-neutral concrete materials and technologies. Topics will include a brief overview of NEU, the status of the NEU Validation/Verification Program, and a summary of a recent survey of suppliers of materials and technologies.

Handout: Update on NEU


Demonstrating Low Carbon Concrete for Tilt-Up Wall Panel Construction

Presented By: Thomas Van Dam
Affiliation: Wiss, Janney, Elstner Associates, Inc.
Description: The results of a low-carbon concrete tilt-up wall panel demonstration project will be presented that evaluated three concrete mixtures: a base level Type IL (Mix#1), the Type IL with 25% replacement with slag cement (Mix #2), and an ASTM C1157 cement with less than 5% portland cement (Mix#3). Extensive laboratory testing determined the bleed rate, initial and final set, compressive strength, splitting tensile strength, modulus of elasticity, and drying shrinkage of the three mixtures as well as establishing maturity relationships. Full-scale tilt wall panels were laid out and instrumented with strain gauges, thermocouples, inclinometers, and commercially available maturity meters. The concrete was cast under cold conditions in St. Louis, MO (32 °F at time of casting), which persisted for days afterward. Observations were made regarding the workability and finishability of the mixtures, and strength and maturity monitored. Mix #1 and Mix #2 achieved targeted strength and were tilted into place after 3 days. Difficulties in matching the strength of companion cylinders with that predicted by maturity delayed tilting the panel made with Mix #3 until coring confirmed that targeted strength was reached after 7 days. Considerable information was obtained through testing and in situ monitoring providing lessons on how to use concrete with significantly lower carbon even under difficult temperature conditions.


Reducing the GWP of Concrete: Thoughts on Reactivity, EPDs and Optimization

Presented By: Jason Weiss
Affiliation: Oregon State University
Description: Concrete materials and mixture proportions are changing to reduce the global warming potential (GWP) associated with concrete production. To reduce the GWP of concrete the industry is moving to replace cement clinker with supplementary cementitious materials (SCM, e.g., natural pozzolans, recycled glass, industrial by-products, or carbonated cement fines) that are emerging to reduce the GWP of concrete mixtures. This presentation will discuss the need for accurate quantification of the reactivity of these materials. Calculation of the environmental product declaration (EPD) of concrete will be discussed along with shortcomings of using this approach.


Carbon Neutrality and Sustainability Design of Concrete Structures

Presented By: Koji Sakai
Affiliation: Japan Sustainability Institute
Description: Carbon neutrality is an essential part of sustainable concrete construction. Sustainability in the use of concrete structures is realized by the application of performance-based sustainability design. Regarding carbon reduction towards carbon neutrality, an appropriate transition design is indispensable as there is no magic. The essence of de-carbon neutral turmoil is clarified on the basis of a transition design.

Upper Level Sponsors

ACI Northern California and Western Nevada Chapter
Baker
Conseal
Euclid Chemical
FullForce Solutions
Master Builders
Natural Resources Research Institute - University of Minnesota
PS=0