Title:
Novel Clay-Mitigating Polymers for Robust Water-Reducing Admixtures
Author(s):
Lawrence L. Kuo, Robert J. Hoopes, Angel Abelleira, Pung Chan, and Qingye Zhou
Publication:
Concrete International
Volume:
41
Issue:
1
Appears on pages(s):
43-46
Keywords:
polycarboxylate, aggregate, test, dosage
DOI:
Date:
1/1/2019
Abstract:
A new class of clay-mitigating admixtures has been developed to mitigate absorption of polycarboxylate-based high-range water-reducing admixtures by clay-bearing aggregates. This absorption can cause reduced dosage efficiency and increased slump loss over time, thereby resulting in increased dosage rates for polycarboxylate-based admixtures. The article summarizes field tests that show that these clay-mitigating admixtures provide a robust solution when used with a wide array of clay-bearing aggregates.