| 高温作用后混凝土性能试验研究 |
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| 引用本文： | 陈丽红,孟宏睿,林友军. 高温作用后混凝土性能试验研究[J]. 新型建筑材料, 2006, 0(9): 12-14 |
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| 作者姓名： | 陈丽红 孟宏睿 林友军 |
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| 作者单位： | 1. 陕西理工学院土木工程与建筑系,陕西,汉中,723001
2. 陕西理工学院土木工程与建筑系,陕西,汉中,723001;西安建筑科技大学土木学院,陕西,西安,710055 |
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| 摘 要： | 建筑物在高温火灾作用后,作为主要承重构件的钢筋混凝土会发生不同程度的损坏,钢筋与混凝土的握裹力减弱,应力损失严重;而混凝土则会发生一系列物理化学变化。着重研究了在不同高温作用下,混凝土的强度变化及其破碎后骨料的性能。试验结果表明,混凝土强度随作用温度的升高而下降,破碎后骨料的吸水率和压碎指标受内部缺陷、作用温度和粒径大小的影响较为显著。
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| 关 键 词： | 混凝土 骨料 高温作用 性能变化 |
| 文章编号： | 1001-702X（2006）09-0012-03 |
| 收稿时间： | 2005-09-26 |
| 修稿时间： | 2005-09-26 |
Experimental study on performance of concrete after heated by high temperature |
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| CHEN Lihong,MENG Hongrui,LIN Youjun. Experimental study on performance of concrete after heated by high temperature[J]. New Building Materials, 2006, 0(9): 12-14 |
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| Authors: | CHEN Lihong MENG Hongrui LIN Youjun |
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| Abstract: | As the main supporting member of structure, reinforced concrete will be damaged in various degrees after high-temperature conflagration.For example the bond ability of concrete and reinforcing bar is weakened, the stress is lost seriously, and a series of physicochemical changes take place in the concrete.This paper studies emphatically the changes of concrete strength under different high temperatures,and the performance of aggregate after brokenness. The test shows:the concrete strength reduces with heated temperature increases,the specific water absorption and crushing index of broken aggregate are remarkably influenced by its inside defects, heated temperature and grain size. |
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| Keywords: | concrete aggregate high-temperature heated changes of performance |
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