碾压沙漠砂贫混凝土的饱水软化及耗散能特征研究  

Study on water saturated softening and energy dissipation characteristics of lean concrete with rolled desert sand

作　　者：邹承君 关英林 康亚明 ZOU Chengjun;GUAN Yinglin;KANG Yaming(Chemical Science and Engineering College,North Minzu University,Yinchuan 750021,China;School of Electromechanical Engineering,North Minzu University,Yinchuan 750021,China)

机构地区：[1]北方民族大学化学与化学工程学院,宁夏银川750021 [2]北方民族大学机电工程学院,宁夏银川750021

出　　处：《混凝土》2024年第3期74-77,共4页Concrete

基　　金：国家自然科学基金(51569001);北方民族大学校企联合横向项目(2102000247)。

摘　　要：为了研究碾压沙漠砂贫混凝土饱水软化后的物理力学特征,开展了不同配合比下的饱水软化试验,结果表明:(1)质量吸水率约为10%~22%,体积吸水率约为18%~40%;(2)饱水软化后抗压强度下降约50%~60%,故软化系数约为0.4~0.5;(3)试块的耗散能系数随水泥含量的增加而增大,延性系数则相反,与干燥时相比,饱水后两者均略有下降。In order to study the physical and mechanical characteristics of rolled desert sand lean concrete after water saturation softening,water saturation softening tests under different mix proportions were carried out.The results show that(1)The mass water absorption is about from 10%to 22%,and the volume water absorption is about from 18%to 40%;(2)After saturated softening,the compressive strength decreases about from 50%to 60%,so the softening coefficient is about from 0.4 to 0.5;(3)The dissipated energy coefficient of the test block increases with the increase of cement content,while the ductility coefficient is on the contrary,compared with dry,both of them decrease slightly after water saturation.

关 键 词：沙漠砂贫混凝土 饱水软化 抗压强度 吸水率 吸能特征 

分 类 号：TU528.041[建筑科学—建筑技术科学]