玻璃钢/复合材料 ›› 2019, Vol. 0 ›› Issue (8): 78-81.

• 应用研究 • 上一篇    下一篇

混掺纤维RPC高温后剩余抗压强度及超声检测

贺一轩,杜红秀*   

  1. 太原理工大学建筑与土木工程学院,太原030024
  • 收稿日期:2018-11-20 出版日期:2019-08-28 发布日期:2019-08-28
  • 通讯作者: 杜红秀(1962-),女,教授,博导,主要研究方向为混凝土材料及其火灾损伤评估,tydhx@163.com。
  • 作者简介:贺一轩(1995-),男,硕士研究生,主要研究方向为混凝土材料性能。
  • 基金资助:
    国家自然科学基金项目:基于微结构的高性能混凝土火灾劣化机理及损伤评估理论研究(51278325)

RESIDUAL COMPRESSIVE STRENGTH AND ULTRASONIC TESTING AFTER MIXING FIBER RPC AT ELEVATED TEMPERATURE

HE Yi-xuan, DU Hong-xiu*   

  1. Taiyuan University of Technology, Architecture and Civil Engineering, Taiyuan 030024, China
  • Received:2018-11-20 Online:2019-08-28 Published:2019-08-28

摘要: 为了研究活性粉末混凝土(RPC)的高温损伤,本实验控制聚丙烯纤维、玄武岩纤维体积掺量分别为0.2%、0.1%,测试分析了钢纤维不同体积掺量分别为0、1%、1.5%、2%时的活性粉末混凝土高温后剩余抗压强度、质量损失率、超声波速及其与受火温度的关系。结果表明:随着受火温度的升高,RPC试件剩余抗压强度、超声波速不断降低;掺入钢纤维可提高混掺纤维RPC试件高温后的剩余抗压强度和超声波速数值;混掺纤维RPC试件的抗压强度和超声波速数值随钢纤维体积掺量的增加而增大。

关键词: 活性粉末混凝土, 混掺纤维, 高温, 超声检测, 力学性能

Abstract: In order to study high temperature damage of reactive powder concrete (RPC), in the present experiment, the volume of polypropylene fiber and basalt fiber was controlled to be 0.2% and 0.1%, respectively. Then, the residual compressive strength, mass loss rate, ultrasonic velocity and its relationship with the fire temperature of steel fiber reactive powder concrete with different volume of 0,1%,1.5 % and 2% after high temperature were analyzed. The results show that the residual compressive strength and ultrasonic velocity of RPC specimens decrease continuously with the increase of fire temperature. The incorporation of steel fiber can increase the residual compressive strength and ultrasonic velocity value of the mixed fiber RPC specimen after high temperature. The compressive strength and ultrasonic velocity of the blended fiber RPC specimens increase with the increase of the steel fiber volume.

Key words: reactive powder concrete, mixed fiber, elevated temperature, ultrasonic testing, mechanical properties

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