Development of Ternary Blends for High- Performance Concrete


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Title: Development of Ternary Blends for High- Performance Concrete

Author(s): Nabil Bouzoubaa, Alain Bilodeau, Vasanthy Sivasundaram, Benoit Fournier, and Dean M. Golden

Publication: Materials Journal

Volume: 101

Issue: 1

Appears on pages(s): 19-29

Keywords: bleeding; compressive strength; curing; fly ash; plastic shrinkage; setting time; silica fume; temperature rise

Date: 1/1/2004

The purpose of this study is to develop ternary blends with optimum amounts of fly ash and silica fume to be used in high-performance concrete. Two series of air-entrained concrete mixtures were investigated in this study: Series 1 included concretes with a total cementitious materials content (CM) of 350 kg/m3 and a water-cementitious material ratio (w/cm) of 0.40, and Series 2 included concretes with a total CM of 450 kg/m3 and a w/cm of 0.34. In each series, one silica fume and three fly ashes were used; these consisted of two ASTM Class F and one ASTM Class C fly ashes. Properties of the fresh and hardened concrete such as slump, air content, bleeding, setting time, autogenous temperature rise, plastic shrinkage, compressive strength, and the resistance to chloride-ion penetration were determined. The results have shown that the combined use of fly ash and silica fume in concrete are more advantageous in terms of the following parameters: the dosage of high-range water-reducing admixture (HRWRA), plastic shrinkage, and chloride-ion penetrability.