高性能混凝土的火灾损伤特征

材料科学与工程学报, 2000, 18(z2): 947-950. doi: 10.3969/j.issn.1673-2812.2000.z2.093

高性能混凝土的火灾损伤特征

1.香港,九龙,香港理工大学,土木及结构工程系

2.香港,九龙,香港理工大学,土木及结构工程系

3.香港,九龙,香港理工大学,土木及结构工程系

4.香港,九龙,香港理工大学,土木及结构工程系

为确定高性能混凝土(High Performance Concrete,HPC)材料的火灾损伤特征,进行了试验研究,包括爆裂试验,力学性能试验和X-射线衍射(X-Ray Diffraction,XRD)分析.结果表明,蒸气压机理是HPC爆裂的主要原因.HPC和NSC均在400～800℃范围内失去其大部分的原始强度,因此该范围可视为混凝土丧失强度的关键范围.600～800℃的hcp分解是该范围内HPC强度下降的主要原因,但并不导致HPC的爆裂行为.

参考文献

[1]	AitcinP-CHighPerformanceConcrete.[M].E · FN SPON Press London,1998:591.
[2]	ChanSYN;Peng G F;Anson M .Residual strength and pore structure of high-strength concrete and normal strength concrete after exposure to high temperatares Journal of Cement and Concrete Composites[J].England,1999,21(01):23-27.
[3]	ChinaConstructionMinistry.Strategy and Policy of Comprehensive Prevention and Minimizing of Urban Disaster China Construction Industry Press[M].北京,1996:245.
[4]	PhanLTand;CarinoN J .Proceedings of International Workshop on Fire Performance of High-Strength Concrete[J].NIST SP919 NISTGaithersburg MD USA Feb,1997,13-14:165.
[5]	HertzKD .Danish investigation on silica fume concretes at elevated temperatures ACI[J].American Concrete Institute Materials Journal,1992,89(04):345-347.
[6]	ChanSYN;Peng G F;Anson M .Fire behavior of high-performance concrete made with silica fume at various moisture content[J].ACI Materials Journal,1999,96(03):405-409.
[7]	CastilloCandDurraniAJ.Effect of transient high temperature on high-strength concrete[J].ACI Materials Journal,1990:47-53.
[8]	SanjavanGandStocksLJ.Spalling of highstrength silica fume concrete in fire[J].ACI Materials Journal,1993:170-173.
[9]	MehtaPKand;MonteiroP J M.Concrete: Structure,Properties, and Materials Prentice-Hal[J].NJ USA,1993:548 .

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高性能混凝土的火灾损伤特征

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