再生保温混凝土受拉应力应变全曲线的研究  

Experimental research on stress-strain full curve of recycled aggregate thermal insulation concrete in tension

作　　者：马钢 都思哲 高宇璇 张玉[2] MA Gang;DU Sizhe;GAO Yuxuan;ZHANG Yu(College of Mechanics, Taiyuan University of Technology, Taiyuan 030024, China;College of Architecture and Civil Engineering, Taiyuan University of Technology,Taiyuan 030024, China)

机构地区：[1]太原理工大学力学学院,山西太原030024 [2]太原理工大学建筑与土木工程学院,山西太原030024

出　　处：《新型建筑材料》2018年第7期28-32,59,共6页New Building Materials

基　　金：国家自然科学基金项目(517083855);山西省"1331工程"重点创新团队项目

摘　　要：利用刚性框架法得出完整的再生保温混凝土(RATIC)受拉应力应变全曲线,对再生粗骨料取代率分别为0、30%、50%、70%、100%的RATIC抗拉性能进行了系统的研究,确定了RATIC的受拉性能特征值,得到了RATIC的受拉应力应变全曲线。结果表明,RATIC受拉应力应变全曲线与普通混凝土相似,抗压强度相同时,未掺加再生粗骨料的RATIC的变形能力比普通混凝土提升25.8%,弹性模量降低34.4%。RATIC的变形能力随着再生粗骨料取代率的增大而逐渐减小,弹性模量的变化较小,受拉应力应变全曲线的下降段越来越陡。结合试验数据拟合出RATIC受拉应力应变全曲线方程。This study draws a complete stress-strain full curves of RATIC in tensile by using the rigid frame method, studies the tensile properties of RATIC with 0, 30%, 50%, 70% and 100% replacement ratio, determines the tensile characteristic value, and obtained the full tensile stress and strain curve of RATIC. The test results show that shapes of stress-strain full curves of RATIC and normal concrete in tensile are similar, the deformation ability of RATIC with 0 recycled coarse aggregate replacement ratio in- crease 25.8% than the normal concrete with same strength,while elastic modulus decrease by 34.4%. The deformation capacity of RATIC decreases with the increase of recycled coarse aggregate replacement rate,while the elastic modulus changes less,and the decrease of stress-strain full eurve in tensile becomes steeper. This paper has fit out stress-strain full curve equation of RATIC in tensile by using the test data.

关 键 词：再生保温混凝土 单轴拉伸 应力应变全曲线 拉伸性能 

分 类 号：TU528[建筑科学—建筑技术科学]