水泥乳化沥青砂浆应力-应变本构关系的研究  

Experimental Study on Stress-Strain Constitutive Relations of Cement Asphalt Mortar

作　　者：张苗 田青[1,2] 屈孟娇 祁帅 姚田帅 许鸽龙 邓德华 ZHANG Miao;TIAN Qing;QU Mengjiao;QI Shuai;YAO Tianshuai;XU Gelong;DENG Dehua(Kaifeng Research Center for Engineering Repair and Material Recycle,Henan University,Kaifeng 475004,Henan,China;State Key Laboratory of Green Building Materials,Beijing 100024,China;School of Civil Engineering,Central South University,Changsha 410075,China)

机构地区：[1]河南大学开封市工程修复与材料循环工程技术研究中心,河南开封475004 [2]绿色建筑材料国家重点实验室,北京100024 [3]中南大学土木工程学院,长沙410075

出　　处：《材料导报》2022年第15期43-47,共5页Materials Reports

基　　金：绿色建筑材料国家重点实验室开放基金(2021GBM01);河南省高等学校重点科研项目计划(22B560002)。

摘　　要：采用万能材料试验机对不同配合比的水泥乳化沥青(CA)砂浆进行了单轴压缩试验,探讨了其应力-应变的本构行为,分析了本构方程参数随CA砂浆组成结构的变化规律并建立了两者的定量关系。结果表明:分段式方程计算所得曲线与试验测试曲线符合良好,能够有效反映CA砂浆的单轴受压应力-应变特性。沥灰比(m_(A)/m_(C))与水灰比(m_(W)/m_(C))对CA砂浆微观结构的影响不同,本构方程参数随m_(A)/m_(C)的变化程度大于随m_(W)/m_(C)的变化程度。依据本构方程参数与m_(A)/m_(C)、m_(W)/m_(C)的转换关系及CA砂浆抗压强度、峰值应变的计算公式,可有效估算某一已知配合比的CA砂浆的应力-应变全曲线。In this work,the uniaxial compression test of cement asphalt(CA)mortar with different mix proportions were examined by a universal material testing machine,the constitutive behavior of stress-strain were discussed.The effect of composition and structure on the constitutive equation parameters were analysed,and a quantitative relationship between the two was established.Results show that the calculated curve of the segmented constitutive equation agrees well with the test curve,the segmented equation can effectively reflect the stress-strain characteristics of CA mortar under uniaxial compression.The effects of m_(A)/m_(C)and m_(W)/m_(C)on the microstructure of CA mortar are different,constitutive equation parameters vary with m_(A)/m_(C)to a greater extent than with m_(W)/m_(C).According to the conversion relation between constitutive equation parameters and m_(A)/m_(C),m_(W)/m_(C),moreover,in reference to the calculation formula for compressive strength and peak strain of CA mortar,the full stress-strain curve of a CA mortar with known mix ratio can be estimated effectively.

关 键 词：水泥乳化沥青砂浆 应力-应变曲线 本构关系 配合比参数 

分 类 号：TU528.42[建筑科学—建筑技术科学]