主管：中华人民共和国应急管理部
主办：应急管理部天津消防研究所
ISSN 1009-0029  CN 12-1311/TU
消防科学与技术

消防科学与技术 ›› 2020, Vol. 39 ›› Issue (3): 325-327.

• • 上一篇    下一篇

聚丙烯纤维对C80HPC高温后力学性能的影响

吴振戌，杜红秀，陈尧   

  1. 太原理工大学 土木工程学院,山西 太原 030024
  • 出版日期:2020-03-15 发布日期:2020-03-15
  • 通讯作者: 杜红秀，太原理工大学土木工程学院教授，博导。
  • 作者简介:吴振戌(1994-)，男，太原理工大学土木工程学院硕士研究生，主要从事混凝土材料及结构耐久性方面的研究,山西省太原市万柏林区迎泽西大街79号，030024。
  • 基金资助:
    国家自然科学基金资助项目（51478290）

Effect of polypropylene fiber on mechanical properties of C80HPC after high temperature

WU Zhen-xu, DU Hong-xiu, CHEN Yao   

  1. College of Civil Engineering,Taiyuan University of Technology,Shanxi Taiyuan 030024,China
  • Online:2020-03-15 Published:2020-03-15

摘要： 为了研究聚丙烯纤维对C80高强高性能混凝土高温爆裂及其力学性能的影响，对C80HPC和C80PPHPC进行高温后力学性能的研究，分析C80HPC和C80PPHPC的轴压强度、弹性模量、劈拉强度与不同受火温度之间的关系。试验结果表明：C80HPC和C80PPHPC的轴压强度、弹性模量和劈拉强度均随受火温度的升高而下降，C80PPHPC轴压强度、劈拉强度总体较C80HPC略高；200 ℃前C80PPHPC弹性模量值略大于C80HPC弹性模量值；经受300~600 ℃高温作用，C80HPC部分试件发生爆裂，而C80PPHPC均未爆裂，表明掺加聚丙烯纤维能够抑制爆裂和降低高温对高性能混凝土力学性能的损伤。

关键词: 高性能混凝土, 聚丙烯纤维, 高温, 力学性能

Abstract: In order to study the influence of polypropylene fiber on high temperature bursting and mechanical properties of C80 high strength high-performance concrete,the mechanical properties of C80HPC and C80PPHPC after high temperature were studied,and the relationship between axial compression strength, elastic modulus, splitting tensile strength and different fire temperature of C80HPC and C80PPHPC was analyzed. The test results showed that the axial compression strength, elastic modulus and splitting tensile strength of C80HPC and C80PPHPC all decrease with the increase of fire temperature,and the axial compression strength and splitting tensile strength of C80PPHPC are slightly higher than that of C80HPC. Before 200 ℃,the elastic modulus of C80PPHPC was slightly larger than that of C80HPC. Under the action of high temperature of 300~600 ℃, some specimens of C80HPC burst, but none of C80PPHPC burst, indicating that adding polypropylene fiber can inhibit the bursting and reduce the damage of high temperature to the mechanical properties of HPC.

Key words: high performance concrete, polypropylene fiber; high temperature, mechanical property