流变混凝土骨料运动模拟试验研究  

Experimental Simulation Study on Aggregate Motion of Rheological Concrete

作　　者：田正宏[1,2] 李旭航[2] 朱飞鹏[3] 彭志海[4] 

机构地区：[1]河海大学水文水资源与水利工程科学国家重点实验室,江苏南京210098 [2]河海大学水利水电学院,江苏南京210098 [3]河海大学力学与材料学院,江苏南京210098 [4]中国水利水电第七工程局有限公司,四川成都610081

出　　处：《建筑材料学报》2016年第1期22-28,共7页Journal of Building Materials

基　　金：国家自然科学基金资助项目(51279054)

摘　　要：用卡波姆凝胶配制与流变混凝土浆体流变性能等效的透明浆体,通过可视化物模试验模拟得到流变混凝土骨料的运动规律.基于真实与模拟介质流动图像、振动骨料分布实时一致性原则,分析了拌和物流动过程形变、振动骨料沉降特点及其形成机理.结果表明:流变混凝土基于等效流变性能的可视化模拟方法独特可行,可直观获取骨料沉降运动规律以及速度场、位移场等运动形态参数,为进一步研究流变混凝土的本构关系及颗粒接触模型提供基础.Visual physical model experiment of aggregates motion law were carried out via transparent adhesive prepared from carbomer gel with equivalent rheological properties of fresh concrete.Based on the principle of consistency in both real-time image of flow process and real aggregate distribution from fresh mortar and transparent adhesive,the mechanism of rheological deformation of mortar and aggregate settling characteristics forced vibration was analyzed.Results indicate that visual simulation method of fresh concrete based on equivalent rheological properties is unique and feasible,and from the experiments the aggregates settlement motion law i.e.,displacement fields,velocity fields and other motion morphological parameters can be directly obtained,which provide vital foundation on the analysis of constitutive relationship and grain contact model of rheological concrete.

关 键 词：流变混凝土 可视化模拟 透明浆体 运动形态参数 

分 类 号：TQ172.1[化学工程—水泥工业]