Brief Report from ACI 2024 Spring Convention, Part 2
Expanded Shale, Clay and Slate Institute
ESCSI is the association for manufacturers of rotary kiln-produced expanded shale, clay and slate lightweight aggregate.
“#CMHA is partnering with the MIT Concrete Sustainability Hub (#CSHub) to model the natural carbon uptake of #CMU and masonry systems. High porosity and unique hollow configuration of dry-cast manufactured concrete masonry units allow significant carbon uptake before leaving the gate,” Craig T Walloch, Director of Materials Science presented.
#Lightweight concrete masonry units contribute to this process and amend carbon reduction with significant savings, several folds of the total carbon, due to thermal insulation properties in heating and cooling operations during the use stage of buildings.
This study adopted the vacuum impregnation of bacteria into a lightweight aggregate (#LWA) technique. Find more here: <OPTIMIZATION OF THE SELF-HEALING EFFICIENCY OF BACTERIAL CONCRETE USING IMPREGNATION OF THREE DIFFERENT PRECURSORS INTO LIGHTWEIGHT AGGREGATE (lsu.edu)>. Omar Omar, Louisiana State University
“The main objectives of this research project were: to evaluate different materials available for internal curing for use in internally cured concrete, evaluate the performance of fresh and hardened concrete with and without internal curing, and determine the potential impact of using internally cured concrete on the concrete durability and sustainability of bridge deck and pavement placements,“ presented Dr. Jose Pacheco , MJ2 Consulting, PLLC .
The presented slide shows how #LWA outperforms #SAP in reducing the unrestrained length change and increasing days to crack. Learn more here: <Internal Curing of Bridge Decks and Concrete Pavement To Reduce Cracking (bts.gov)>.