自密实混凝土冻融循环后基本力学性能试验研究  

Study on the basic mechanical properties of self-compacting concrete after freeze-thaw cycles

作　　者：张萌[1] 刘清[1] 韩风霞[1] 史倩倩[1] 徐欢[1] 高金东[1] 

机构地区：[1]新疆大学建筑工程学院,新疆乌鲁木齐830047

出　　处：《混凝土》2016年第12期22-24,28,共4页Concrete

基　　金：国家自然科学基金资助项目(51368057);国家自然科学基金资助项目(51468061)

摘　　要：为进一步研究乌鲁木齐地区原材料配制自密实混凝土冻融循环下的力学性能,根据分析得出的抗冻性能最佳自密实混凝土配合比(矿粉掺量30%,粉煤灰掺量10%)配制了自密实混凝土。主要对自密实混凝土进行立方体抗压强度、劈裂抗拉强度和应力-应变曲线试验,分析自密实混凝土经受冻融循环后力学性能退化规律。结果表明:立方体抗压强度、劈裂抗拉强度随着冻融循环次数的增加而降低;相对立方体抗压强度和相对劈裂抗拉强度分别与抗冻性能指标拟合相似性较好;纵向应力-应变曲线随冻融循环次数增加斜率降低,混凝土刚度退化。To further study the mechanical properties of self-compacting concrete with raw materials under freeze-thaw cycles in U- rumqi.Based on the analysis to get the best performance of self-compacting concrete frost resistance （the slag ratio is 30%, the fly ash ratio is 10% ） to preparing the self-compacting concrete with the results of previous studies.Studying the concrete cube compressive strength, splitting tensile strength and compressive stress-strain curve, analysis of self-compacting concrete after freeze-thaw cycle through mechani- cal performance degradation.The test results show that the concrete cube compressive strength and splitting tensile strength decreased with the increase of freeze-thaw cycles.Relative cube compressive strength and splitting tensile strength relatively better similarity with antifreeze performance fitting respectively.Longitudinal stress-strain curve with the increase of freeze-thaw cycles slope is reduced,the concrete stiffness degradation.

关 键 词：自密实混凝土 抗压强度 劈裂抗拉强度 应力-应变曲线 

分 类 号：TU528.01[建筑科学—建筑技术科学]