集束PBO纤维增强UHPC性能的研究

孙义牛; 郭建好; 管仁彪; 宫海

文章摘要

集束PBO纤维增强UHPC性能的研究

Study on the Performance of Clustered PBO Fiber Reinforced UHPC

投稿时间：2018-12-17

DOI：10.16018/j.cnki.cn32-1650/n.201903002

中文关键词: PBO纤维 UHPC 流动度力学强度

英文关键词: PBO fiber UHPC fluidity mechanical strength

基金项目:

作者	单位
孙义牛	智聚装配式绿色建筑创新中心南通有限公司, 江苏南通 226010
郭建好	智聚装配式绿色建筑创新中心南通有限公司, 江苏南通 226010
管仁彪	智聚装配式绿色建筑创新中心南通有限公司, 江苏南通 226010
宫海	智聚装配式绿色建筑创新中心南通有限公司, 江苏南通 226010

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中文摘要:

钢纤维和PVA纤维是UHPC常用的增强纤维。但是，钢纤维易腐蚀，且容易扎伤人。PVA纤维力学强度不高，限制了其应用。采用集束PBO纤维增强UHPC，考察其流动度、力学强度和收缩性能，并与钢纤维-UHPC、PVA纤维-UHPC进行比较。结果显示集束PBO纤维增强UHPC的综合性能优于PVA纤维增强UHPC，且掺量为2%(体积百分比)时，集束PBO纤维增强UHPC的抗弯性能和收缩性能与钢纤维增强UHPC相当，抗压强度则低20%。

英文摘要:

Steel fibers and PVA fibers are commonly used as reinforcing fibers in UHPC. However, steel fibers are prone to corrosion and puncture injury. The mechanical strength of PVA fiber is not high, which limits its application. The fluidity, mechanical strength and shrinkage properties of cluster PBO fiber reinforced UHPC were investigated and compared with those of steel fiber-UHPC and PVA fiber-UHPC. The results show that the comprehensive performance of cluster PBO fiber reinforced UHPC is better than that of PVA fiber reinforced UHPC. The flexural and shrinkage properties of cluster PBO fiber reinforced UHPC are similar to those of steel fiber reinforced UHPC, and the compressive strength of cluster PBO fiber reinforced UHPC is 20% lower when the content is 2%(volume percentage).

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