The effects of air entrainment and pozzolans on frost resistance of 50-60 MPa grade concrete

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	The effects of air entrainment and pozzolans on frost resistance of 50-60 MPa grade concrete
	Peng, Gai-Fei ; Ma, Qiang ; Hu, Hong-Mei ; Gao, Ri ; Yao, Qian-Feng ; Liu, Ye-Feng ; Ma Q(马强) ; Hu HM(胡红梅)
刊名	http://dx.doi.org/10.1016/j.conbuildmat.2006.02.002
	2007-05
关键词	HIGH-PERFORMANCE CONCRETE DURABILITY
英文摘要	An experimental investigation was conducted using an air-entraining agent and pozzolans such as silica fume and fly ash, to meet the design strengths 50 and 60 MPa, as well as frost resistance to 300 cycles of freezing and thawing. Among a series of concretes of grade 50 or 60 MPa, only a small part could resist 300 cycles of freezing and thawing. It was demonstrated that frost resistance might be independent on strength of concrete. By means of mercury intrusion porosimeter, the pore structure characteristics of six concretes were identified. Air entrainment, no matter whether the pozzolans were used, caused an increase in cumulative pore volume, and also an increase in the mean pore size. It is revealed that, as to concrete at a 0.32 water/binder ratio, air entrainment should be a main approach to enhance frost resistance, although the pozzolans could be used to increase long-term strength of concrete. (c) 2006 Elsevier Ltd. All rights reserved.
语种	英语
出版者	CONSTR BUILD MATER
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/89965]
专题	建筑土木－已发表论文
推荐引用方式 GB/T 7714	Peng, Gai-Fei,Ma, Qiang,Hu, Hong-Mei,et al. The effects of air entrainment and pozzolans on frost resistance of 50-60 MPa grade concrete[J]. http://dx.doi.org/10.1016/j.conbuildmat.2006.02.002,2007.
APA	Peng, Gai-Fei.,Ma, Qiang.,Hu, Hong-Mei.,Gao, Ri.,Yao, Qian-Feng.,...&胡红梅.(2007).The effects of air entrainment and pozzolans on frost resistance of 50-60 MPa grade concrete.http://dx.doi.org/10.1016/j.conbuildmat.2006.02.002.
MLA	Peng, Gai-Fei,et al."The effects of air entrainment and pozzolans on frost resistance of 50-60 MPa grade concrete".http://dx.doi.org/10.1016/j.conbuildmat.2006.02.002 (2007).