高温后纤维高强混凝土灌浆界面受剪性能试验研究

消防科学与技术 ›› 2025, Vol. 44 ›› Issue (2): 236-241.

高温后纤维高强混凝土灌浆界面受剪性能试验研究

徐晨¹, 毛小勇^1,2, 朱勇¹, 蔡新江¹

（1.苏州科技大学土木工程学院，江苏苏州 215011； 2.苏州城市学院，江苏苏州 215100）

收稿日期:2024-04-10 修回日期:2024-08-02 出版日期:2025-02-15 发布日期:2025-02-15
作者简介:徐晨，苏州科技大学土木工程学院硕士研究生，主要从事结构抗火研究，江苏省苏州市虎丘区滨河路1701号，215011。
基金资助:
国家自然科学基金（52278514）；江苏省高等学校基础科学（自然科学）研究重大项目（21KJA560002）

Experimental study on shear behavior of fiber-reinforced high-strength grout-concrete interface after elevated temperature

Xu Chen¹, Mao Xiaoyong^1,2, Zhu Yong¹, Cai Xinjiang¹

(1. School of Civil Engineering, Suzhou University of Science and Technology, Suzhou Jiangsu 215011, China;2. Suzhou City University, Suzhou Jiangsu 215104, China)

Received:2024-04-10 Revised:2024-08-02 Online:2025-02-15 Published:2025-02-15

摘要/Abstract

摘要： 为研究高温后纤维高强混凝土灌浆界面受剪性能，对 Z 形双面剪切试件进行受剪推出试验，考虑温度（20、100、300、500、600 ℃）、界面粗糙度、灌浆料强度对受剪性能的影响。结果表明：随着温度升高，界面抗剪承载力呈下降趋势；增加界面粗糙度能有效提高界面的抗剪承载力，随着温度升高，界面粗糙度对抗剪承载力的影响无明显变化；增加灌浆料的强度等级，能够提升界面的抗剪承载力。

关键词: 高温后, 混凝土灌浆界面, 抗剪承载力, 界面粗糙度

Abstract: To examine the shear behavior of the interface between concrete and fiber-reinforced high-strength grout after high-temperature exposures, Z-type double shear test specimens were designed and tested via ther‐ mal and push-out shear experiments. The test parameters include temperatures of 20, 100, 300, 500, and 600 ℃, interface roughness and grout strength. The results show that the shear resistance of the interface decreases with the increase in temperature. By improving the interface roughness, the interfacial shear capacity was enhanced, and the efficiency of the enhancement remained relatively stable as the temperature increased. Moreover, the shear resistance of the interface was found to be positively correlated with the strength of the grout.

Key words: post-elevated-temperature, concrete-CGM interface, shear resistance, interface roughness

徐晨, 毛小勇, 朱勇, 蔡新江. 高温后纤维高强混凝土灌浆界面受剪性能试验研究[J]. 消防科学与技术, 2025, 44(2): 236-241.

Xu Chen, Mao Xiaoyong, Zhu Yong, Cai Xinjiang. Experimental study on shear behavior of fiber-reinforced high-strength grout-concrete interface after elevated temperature[J]. Fire Science and Technology, 2025, 44(2): 236-241.