全轻混凝土基本力学性能试验研究  

Experimental study on basic mechanical properties of full light-weight concrete

作　　者：李长永[1] 钱晓军[1] 赵顺波[1] 

机构地区：[1]华北水利水电学院生态建筑材料河南省高校重点实验室培育基地,河南郑州450011

出　　处：《混凝土》2010年第5期79-82,共4页Concrete

基　　金：郑州市科技领军人才项目(096SYJH23105);河南省高校创新人才培养工程培养对象项目(豫教高[2004]294号)

摘　　要：研究了水泥用量、水灰比、砂率对全轻混凝土立方体抗压强度、轴心抗压强度、劈裂抗拉强度、轴心抗拉强度和抗弯强度的影响。结果表明:全轻混凝土受压破坏形态为散体状、受拉断裂面平齐,呈现明显的脆性破坏特征;全轻混凝土的强度取决于水泥砂浆强度和陶粒强度的强弱,存在使全轻混凝土各强度指标达到最佳值的砂率、水泥用量和水灰比。与普通混凝土及采用轻粗骨料、普通砂的轻骨料混凝土不同,全轻混凝土的轴心抗压强度接近于其立方体抗压强度、轴心抗拉强度高于劈裂抗拉强度,对此需进一步系统研究。The experiments were conducted to study the influences of cement content,water to cement ratio and sand ratio on the cubic com- pressive strength,axial compressive strength,splitting-tensile strength,axial-tensile strength and flexural-tensile strength of full light-weight con- crete composited with expanded-shale and light-weight sand.It is proved that the full light-weight concrete was failed as obvious brittleness in crushed state under compression and even breaking cross-section under tension.The full light-weight concrete strengths relied on which was larger between the strength of cement past and that of expanded-shale,there were optimum values of sand ratio,cement content and water to cement ratio to make the optimum values of every strengths of full light-weight concrete.For the full light-weight concrete,differently from the ordinary con- crete and the light-weight concrete only composed with light-weight coarse aggregate,the axial compressive strength was closed to the cubic com- pressive strength,and the axial-tensile strength was larger than the splitting-tensile strength,so that further studies should be conducted to clarify the mechanism or reasons.

关 键 词：全轻混凝土 页岩陶粒 轻砂 抗压强度 抗拉强度 抗弯强度 

分 类 号：TU528.2[建筑科学—建筑技术科学]