Novel Clay-Mitigating Polymers for Robust Water-Reducing Admixtures

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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

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.