预吸水硅藻土对高强混凝土早期抗裂性能的影响

doi:10.11896/j.issn.1005-023X.2018.20.009

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Abstract In this paper, the diatomite were wetted to be used as the admixture in high-strength concrete in order to solve its early cracking problem. The effect of pre-wetted diatomite (the mass fraction of dry diatomite are 1%, 3% and 5%) on the early-age cracking resistance and the basic mechanical performance of high-strength concrete were studied. Water losing principle of the pre-wetted diatomite high-strength concrete was also tested by evaporation test. The results showed that the pre-wetted diatomite could significantly improve the early cracking resistance of the high-strength concrete. When the mass fraction of dry diatomite are 1%, 3% and 5%, the early cracking area of concrete were reduced by 31.8%, 54.4% and 65.8%. Meanwhile, the pre-wetted diatomite could significantly reduce the water losing of concrete, which inhibits plastic shrinkage. In addition, the incorporation of the pre-wetted diatomite could increases the tensile strength and the ratio of tension and compressive strength, and had no great negative effect on the compressive strength.

Key words： diatomite high-strength concrete pre-wetted early cracking brittleness mechanical property

Published: 22 November 2018

CLC number:

TU528

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	Articles by authors
	JIANG Feng
	SHI Yalong
	ZHANG Hongen
	SHI Xiaoshuang
	WANG Qingyuan

Cite this article:

JIANG Feng,SHI Yalong,ZHANG Hongen, et al. Effect of the Pre-wetted Diatomite on the Cracking Resistance of High-strength Concrete at Early-age[J]. Materials Reports, 2018, 32(20): 3541-3545.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2018.20.009 OR http://www.mater-rep.com/EN/Y2018/V32/I20/3541

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