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Properties of high-performance concrete containing shrinkage-reducing admixture
The effects of a recently developed SRA (shrinkage-reducing admixture) on high-performance concrete properties are described. High-performance concrete mixtures containing silica fume were cast with and without shrinkage-reducing admixture. The mechanical properties, drying shrinkage, and resistance to restrained shrinkage cracking were investigated. The use of SRA in high-performance concrete was found to significantly reduce drying shrinkage and restrained shrinkage cracking in laboratory ring specimens. The effectiveness of SRA in reducing shrinkage was observed despite a very short (24-hours) moist-curing period. However, proper curing should remain an essential component in concrete field applications, and this improved curing would also increase the efficacy of SRAs in reducing shrinkage and subsequent cracking. Concrete containing SRA exhibited lower early strengths than companion mixtures without SRA. This strength loss can be offset to some degree by reducing the mixing water to account for the water-reducing tendency of SRA addition.
Properties of high-performance concrete containing shrinkage-reducing admixture
The effects of a recently developed SRA (shrinkage-reducing admixture) on high-performance concrete properties are described. High-performance concrete mixtures containing silica fume were cast with and without shrinkage-reducing admixture. The mechanical properties, drying shrinkage, and resistance to restrained shrinkage cracking were investigated. The use of SRA in high-performance concrete was found to significantly reduce drying shrinkage and restrained shrinkage cracking in laboratory ring specimens. The effectiveness of SRA in reducing shrinkage was observed despite a very short (24-hours) moist-curing period. However, proper curing should remain an essential component in concrete field applications, and this improved curing would also increase the efficacy of SRAs in reducing shrinkage and subsequent cracking. Concrete containing SRA exhibited lower early strengths than companion mixtures without SRA. This strength loss can be offset to some degree by reducing the mixing water to account for the water-reducing tendency of SRA addition.
Properties of high-performance concrete containing shrinkage-reducing admixture
Einfluß eines schwindungshemmenden Zusatzes auf die Eigenschaften von Hochleistungsbetonen
Folliard, K.J. (author) / Berke, N.S. (author)
Cement and Concrete Research ; 27 ; 1357-1364
1997
8 Seiten, 13 Bilder, 6 Tabellen, 9 Quellen
Article (Journal)
English
Properties of High-Performance Concrete Containing Shrinkage-Reducing Admixture
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