Performance of High-Durability Concrete Using an Advanced Hybrid Admixture


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Title: Performance of High-Durability Concrete Using an Advanced Hybrid Admixture

Author(s): K. Saito , M. Kinoshita, and H. Umehara

Publication: Special Publication

Volume: 262


Appears on pages(s): 123-138

Keywords: autogenous shrinkage; drying shrinkage; durability; high range; high-strength concrete; polycarboxylate; shrinkage-reducing admixtures; water-reducing admixtures.

Date: 10/1/2009

In order to develop a chemical admixture which improves durability of concrete, we have experimentally made two types of hybrid admixtures combining a single-liquid type, high-range, water-reducing admixture with a shrinkage-reducing admixture, and examined their concrete properties, ranging from normal - to ultrahigh-strength. Hybrid admixture, HSP1, for normal-strength concrete, showed reduced drying shrinkage of approximately 15 % and HSP2, for high-strength concrete, showed an autogenous shrinkage reducing ability of approximately 20~35 %. Also, both showed sufficient resistance to frost damage and carbonation.