高温后不同轻质混凝土的劣化性能  

Experimental study on degradation performance of different lightweight concrete after high temperature

作　　者：李亚涛 薛盟盟 Li Yatao;Xue Mengmeng(Beijing Urban Construction Design&Development Group Co.,Ltd.,Beijing 100037,China;Patent Examination Cooperation(Beijing)Center of the Patent Office,Cnipa,Beijing 100160,China)

机构地区：[1]北京城建设计发展集团股份有限公司,北京100037 [2]国家知识产权局专利局专利审查协作北京中心,北京100160

出　　处：《山西建筑》2021年第21期112-115,118,共5页Shanxi Architecture

摘　　要：为了探讨不同环境温度对不同轻质混凝土力学劣化性能的影响,以LC30全轻混凝土(ALWAC)、全轻纤维混凝土(FRALWAC)、自密实轻骨料混凝土(SCLWC)为研究对象,对其在经历不同温度后的力学劣化性能对比分析。结果表明:200℃以内,混凝土的轴心抗压强度和劈拉强度均随温度的升高而有下降的趋势;SCLWC由于其密实性,高温下抗爆裂性能较差;高温后SCLWC抗压强度损失并不严重,仍可继续承受荷载;FRALWAC高温后应力-应变全段曲线与常温下基本一致,但其吸收的能量和峰值应力均高于ALWAC。In order to explore the influence of different environmental temperatures on the mechanical deterioration of different lightweight concretes,LC30 all-light concrete(ALWAC),all-light fiber concrete(FRALWAC),and self-compacting lightweight aggregate concrete(SCLWC)are used as the research objects.Comparative analysis of mechanical degradation performance after different temperatures.The results show that within 200℃,the axial compressive strength and split tensile strength of concrete tend to decrease with increasing temperature.SCLWC has poor burst resistance at high temperature due to its compactness.The loss of SCLWC compressive strength after high temperature is not serious,and the load can continue to be carried.The stress-strain curve of FRALWAC after high temperature is basically the same as that at room temperature,but the energy and peak stress absorbed are higher than that of ALWAC.

关 键 词：全轻混凝土 自密实轻骨料混凝土 纤维 页岩陶粒 高温 

分 类 号：TU528[建筑科学—建筑技术科学]