复合纤维对高性能混凝土高温性能的影响研究

张道玲; 鞠丽艳

doi:10.13204/j.gyjz200501002

复合纤维对高性能混凝土高温性能的影响研究

doi: 10.13204/j.gyjz200501002

张道玲¹,
鞠丽艳²

1.
1. 上海市第一市政工程有限公司,上海,200083;
2.
2. 同济大学,材料科学与工程学院,上海,200092

基金项目:

上海市建设基金项目资助(项目编号:50078041)

详细信息

作者简介:
张道玲女 1977年11月出生工程师

中图分类号: TU528
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- 文章访问数: 78
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- PDF下载量: 95
- 被引次数: 0
出版历程
- 收稿日期: 2004-07-20
- 刊出日期: 2005-01-20

EFFECTS OF HYBRID FIBER ON HPC PROPERTIES UNDER HIGH TEMPERATURE

Zhang Daoling¹,
Ju Liyan²

1.
1. Shanghai No.1 Municipal Engineering Co.Ltd Shanghai 200083;
2.
2. Materials Science and Engineering School,Tongji University Shanghai 200092

摘要

摘要: 针对高性能混凝土的防火与抗爆裂性能低的特点,采用低熔点(聚丙烯纤维)及高熔点纤维(钢纤维)复合的方法,对高性能混凝土高温性能(抗折强度、抗压强度及劈裂抗拉强度、抗爆裂性能)进行改善。研究表明,800℃时,复合纤维混凝土的抗折强度剩余率约15%,明显高于基准混凝土的抗折强度剩余率(约6%);抗压强度剩余率约15%,与基准混凝土的强度剩余率相当(约15%);劈裂抗拉强度剩余率约20%,明显高于基准混凝土的抗折强度剩余率(约10%)。另外,复合纤维对改善混凝土的抗爆裂性能特别有效,同时分析了复合纤维改善高性能混凝土高温性能的作用机理。
- 复合纤维 /
- 高性能混凝土 /
- 高温性能 /
- 抗爆裂性
Abstract: The effects of hybrid fiber on hi gh performance concrete properties under high temperature were studied.The exper iment applies hybrid fiber with low(polypropylene fiber)and high melting point(s teel fiber)to improve mechanical properties and bursting resistance of high perf ormance concrete,since high performance concrete easily spalls and destroys afte r being on fire.The results show that flexural strength residual rate of hybrid fiber reinforced concrete(about 15%)is higher than that of normal concrete(about 6%);compressive strength residual rate of hybrid fiber reinforced concrete(abou t 15%)is approximate to that of normal concrete(about 15%);splitting tensile str ength residual rate of hybrid fiber reinforced concrete(about 20%) is higher tha n that of normal concrete(about 10%).Hybrid fiber has significant improvement on spalling resistance of concrete,and the active mechanism of hybrid fiber improv ement on high performance concrete is also analyzed.
- hybrid fiber /
- high performance concrete /
- properties under high temperature /
- bursting resistance

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参考文献(10)

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