超高性能混凝土的火灾高温性能研究综述<sup>*</sup>

doi:10.11896/j.issn.1005-023X.2017.023.002

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Abstract Ultra-high-performance concrete (UHPC) which exhibits superb properties with respect to strength and durability, within the scope of the sustainable development strategy of China, has become one of the major development directions of concrete science and technology. In recent years, fire resistance of UHPC has provoked extensive research attention. Based on a literature review, it can be found that high temperature can cause explosive spalling and mechanical strength variation of UHPC, in which the former is mainly governed by a vapor pressure mechanism. The vapor pressure is induced by internal free water, as high moisture content can lead to severe spalling. Adding polymer fiber, such as polypropylene (PP) fiber, is an effective approach to prevent spalling. However, the influence of steel fiber on UHPC's resistance to explosive spalling is still under active controversy. Moreover, residual strength of UHPC exposed to high temperature will increase within the range from room temperature to 300 ℃ or 400 ℃ due to a series of high-temperature-activated chemical changes in UHPC, but will decrease monotonically at higher temperature. As a new research finding, combined curing has demonstrated a favorable efficiency to enhancing the resistance of UHPC to explosive spalling under high temperature, which displays a potential as a novel approach to prohibiting the occurrence of spalling.

Key words： ultra-high-performance concrete (UHPC) fire resistance spalling mechanical strength

Published: 08 May 2018

CLC number:

TU528.31

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	Articles by authors
	PENG Gaifei
	NIU Xujing
	CHENG Kai

Cite this article:

PENG Gaifei,NIU Xujing,CHENG Kai. Research on Fire Resistance of Ultra-high-performance Concrete:a Review[J]. Materials Reports, 2017, 31(23): 17-23.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2017.023.002 OR http://www.mater-rep.com/EN/Y2017/V31/I23/17

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