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.


From the Lab to the Field – Experiences with Portland Limestone Cement, Part 2 of 2

Tuesday, March 26, 2024  4:00 PM - 6:00 PM, Strand 12B

This session will review lessons learned from cement manufacturing, concrete producers, and concrete contactors and finishers. This session will discuss the field observations and growing pains being discovered. In addition to real-world observations, several scientific factors will be discussed. While not all answers are known, progress is being made and challenges tackled!

Learning Objectives:
(1) Discuss what research has been completed, what is currently being performed and what is planned;
(2) Discuss producer experiences with PLC concrete;
(3) Describe how portland-limestone cement differs from a traditional cement with regards to finishing and curing;
(4) Assess what contractors and finishers are experiencing in the field as they incorporate Type IL portland-limestone cement in their markets.

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.


Introduction and Session Goals

Presented By: Lawrence Taber
Affiliation: Black & Veatch SPC
Description: Portland Limestone Cement (PLC), known as Type IL cement in the USA, has now replaced traditional cement in most areas in an effort to reduce carbon emissions from the concrete industry. While PLC has been successfully used for many years in markets stretching from Canada to Europe, its introduction into American markets has created a lot of conversation, debate, and experienced some growing pains for fresh concrete properties during placement. The need to follow proper curing procedures and other good concrete placement techniques has become even more critical than before. This session will discuss everything from research being performed to real-world observations from the field in an objective manner.


Experiences Producing Concrete using PLC

Presented By: Mike Baldoni
Affiliation: IMI
Description: PLC was first introduced in 2020 to the midwest market and imi was an early adopter of trial batching and field pours to start to understand the impact of the change. As the cement companies ramped up production, communication amongst the industry became vital. Gaining agency buy-in, reviewing active project submittals, increased plant testing and understanding the change for the contractor all became an added workload for the ready mixed concrete industry. While a lot has been learned, it is clear that more work is needed to quantify changes in fresh and hardened properties and what predictive testing can be used to help mitigate variability and risk. A few case studies on how a successful project can be planned and executed will be presented.


Placing PLC Concrete

Presented By: Kyle Kammer
Affiliation: Concrete Strategies
Description: PLC has presented many challenges to the industry in recent years. Along with the change of materials, many things have shifted and necessitated change in the way concrete is placed. This presentation will include, some of the preconstruction items to look at and consider will be highlighted, several changes to processes of placement will be discussed as well as the importance of trial batches and adequate test placements.


Experiences Placing and Finishing PLC

Presented By: ROBERT YOUNG
Affiliation: LITHKO
Description: This presentation will discuss the adverse effects technicians have noticed in the field and discuss the adjustments in products and processes to overcome these when placing PLC. Specifically discuss mix designs and additives with their effects at the time of placement and move specifically to finishing flat work containing PLC. Directives given on techniques, timing and products post placement.


Water in OPC and PLC at Early Ages and its Impact on Finishing

Presented By: Jason Weiss
Affiliation: Oregon State University
Description: While there has been substantial research in PLC, this presentation will review the early-age performance as it relates to shrinkage and curing. Discussions on the role of water and the particle size distribution are discussed as well as early age reactions. Recommendations are made as it relates to curing and performance.


Discussion and Next Steps

Presented By: Ben Wiese
Affiliation: Green Umbrella Architectual Concrete Systems
Description: The session will conclude with a panel discussion highlighting lessons learned and how the topics discussed relate back to modern curing practice.

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
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