[1]赖建中,徐 升,杨春梅,等.聚乙烯醇纤维对超高性能混凝土高温性能的影响[J].南京理工大学学报(自然科学版),2013,37(04):633.
 Lai Jianzhong,Xu Sheng,Yang Chunmei,et al.Influence of polyvinyl alcohol fibers on the properties of ultra high performance concrete at high temperature[J].Journal of Nanjing University of Science and Technology,2013,37(04):633.
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聚乙烯醇纤维对超高性能混凝土高温性能的影响
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《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

卷:
37卷
期数:
2013年04期
页码:
633
栏目:
出版日期:
2013-08-31

文章信息/Info

Title:
Influence of polyvinyl alcohol fibers on the properties of ultra high performance concrete at high temperature
作者:
赖建中徐 升杨春梅过旭佳朱耀勇
南京理工大学 材料科学与工程学院,江苏 南京 210094
Author(s):
Lai JianzhongXu ShengYang ChunmeiGuo XujiaZhu Yaoyong
School of Materials Science and Engineering,NUST,Nanjing 210094,China
关键词:
超高性能混凝土 聚乙烯醇纤维 高温 爆裂 超声波法 抗压强度
Keywords:
ultra high performance concrete polyvinyl alcohol fiber high temperature spalling ultrasonic wave method compressive strength
分类号:
TU528
文献标志码:
A
摘要:
对含有聚乙烯醇(Polyvinyl alcohol,PVA)纤维的超高性能混凝土进行高温试验,从质量损失、超声波波速、抗压强度三方面分析高温作用后混凝土的性能变化规律。研究表明,随着加热温度升高,质量损失增大,超声波波速下降,混凝土抗压强度在300 ℃之前逐渐上升,400 ℃之后逐渐下降; 混掺PVA纤维和钢纤维,既可以改善高温下超高性能混凝土的抗爆裂性能,又具有很高的残余强度。该文探讨了超高性能混凝土的高温爆裂机理,这种高温爆裂是由蒸汽压和组织结构变化共同导致的。
Abstract:
The properties of polyvinyl alcohol(PVA)fiber reinforced ultra high performance concrete(UHPC)including quality loss,ultrasonic velocity and compressive strength are researched at high temperature.Results show that the quality loss increases and ultrasonic velocity decreases with the increase of the temperature.The compressive strength increases before 300 ℃ and decreases after 400 ℃ with the increase of the temperature.Reinforced by both PVA fiber and steel fiber,UHPC has both high anti-spalling ability and high remain compressive strength.The mechanism of the spalling of UHPC at high temperature is discussed and the spalling is caused by the vapor pressure and the composition chang in UHPC at high temperature.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2012-10-07 修回日期:2013-03-29
基金项目:国家自然科学基金(51278249; 50808101); 江苏省土木工程材料重点实验室开放基金(2012CEM03); 中国博士后科学基金(20080431100; 200902520)
作者简介:赖建中(1978-),男,博士,副教授,主要研究方向:土木工程材料,E-mail:jzh-lai@163.com。
更新日期/Last Update: 2013-08-31