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

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.