矿物掺合料对自密实混凝土流变性能的影响

doi:10.13229/j.cnki.jdxbgxb201602016

吉林大学学报(工学版) ›› 2016, Vol. 46 ›› Issue (2): 439-444.doi: 10.13229/j.cnki.jdxbgxb201602016

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Influence of mineral admixtures on the rheological behavior of self-compacting concrete

GAO Xiao-jian^{1, 2}, SUN Bo-chao², YE Huan², WANG Zi-long²

1.Key Lab of Structures Dynamic Behavior and Control,Ministry of Education, Harbin Institute of Technology,Harbin 150090, China;
2.School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China

Received:2014-06-23 Online:2016-02-20 Published:2016-02-20

Abstract

Abstract: In this paper, the influence of mineral admixtures on the rheological properties of fresh Self-Compacting Concrete (SCC) mixture was studied using a new type of concrete rheometer. The results show that both yield shear stress and plastic viscosity of the SCC mixture decrease as the content of fly ash in the mixture increases. As the content of Ground Granulated Blast Furnace Slag (GGBFS) increases, the thixotropy behavior of the SCC mixture becomes more obvious, and the yield stress decreases first and then increases. Both the yield stress and the thixotropy behavior of SCC mixture increase with the addition of limestone powder. For all the SCC mixtures with different mineral admixtures, as the storage time increases, the thixotropy behavior of fresh concrete is gradually weakened, the yield stress increases and the plastic viscosity decreases.

Key words: building materials, self-compacting concrete(SCC), rheological behavior, fly ash, ground granulated blast furnace slag(GGBFS), limestone powder

CLC Number:

TU528.53

GAO Xiao-jian, SUN Bo-chao, YE Huan, WANG Zi-long. Influence of mineral admixtures on the rheological behavior of self-compacting concrete[J].吉林大学学报(工学版), 2016, 46(2): 439-444.

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