Pore pressure development in hybrid fibre-reinforced high strength concrete at elevated temperatures

被引：187

作者：

Bangi, Mugume Rodgers ^{[1
]}

Horiguchi, Takashi ^{[1
]}

机构：

[1] Hokkaido Univ, Grad Sch Engn, Lab Environm Mat Engn, Sapporo, Hokkaido 0608628, Japan

来源：

CEMENT AND CONCRETE RESEARCH | 2011年 / 41卷 / 11期

关键词：

Temperature; High performance concrete; Fibre reinforcement; Mechanical properties; Spalling;

D O I：

10.1016/j.cemconres.2011.07.001

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The present experimental work investigates the build-up of pore pressure at different depths of High Strength Concrete (HSC) and Hybrid-Fibre-Reinforced High Strength Concrete (HFRHSC) when exposed to different heating rates. First, the effect of the measurement technique on maximum pore pressures measured was evaluated. The pressure measurement technique which utilised a sintered metal and silicon oil was found to be the most effective technique for pore pressure measurement. Pore pressure measurements carried out showed that addition of polypropylene fibres is very effective in mitigation of spalling and build-up of pore pressure inside heated HSC. Addition of steel fibres plays some role in pore pressure reduction at relatively higher pressures in deeper regions of concrete during fast heating. Pore pressure development is highly influenced by the rate of heating with fast heating leading to higher pore pressures in the deeper regions of concrete compared to slow heating. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：1150 / 1156

页数：7

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