自燃型煤矸石混凝土力学性能与配合比设计研究  

Study on mechanical properties and mix design of spontaneous combustion coal gangue concrete

作　　者：王晴[1] 王继博[1] 付阳光 黄语嫣[1] 李天如[1] 

机构地区：[1]沈阳建筑大学材料科学与工程学院,辽宁沈阳110168

出　　处：《混凝土》2017年第3期78-81,共4页Concrete

基　　金：固废资源化利用与节能建材国家重点实验室开放课题(SWR-2014-003);"十二五"国家科技支撑计划课题(2012BAJ17B01)

摘　　要：通过基础试验以及正交优化试验,研究自燃型煤矸石混凝土力学性能及其配合比设计参数,结果表明:自燃型煤矸石混凝土力学性能发展规律与普通混凝土基本一致;自燃型煤矸石混凝土配合比设计中强度标准差σ为4.4,水灰比相关系数α_a=0.52,α_b=0.01;自燃型煤矸石混凝土28 d抗压强度的最佳配合比为水灰比0.35,体积砂率37%,减水剂掺量1.8%,各因素显著性优劣顺序:水灰比>减水剂掺量>体积砂率;自燃型煤矸石混凝土比普通混凝土具有更高的比强度。Through basic experiment and orthogonal experimental,study mechanical properties and mix ratio design of spontaneous combustion coal gangue concrete.The results show that development law of mechanical properties of spontaneous combustion coal gangue concrete and ordinary concrete is basically same.ln mix ratio design of spontaneous combustion coal gangue concrete, strength standard de- viation is 4.4, correlation coefficient ofwater cement ratio A =0.52, B=0.01.For the best ratio of 28 d compressive strength of spontaneous combustion coal gangue concrete, water cement ratio is 0.35, volume rate of sand is 37%, water reducing admixture is 1.8%, the order of significant factors are water cement ratio〉water reducing admixture e〉volume rate of sand.The spontaneous combustion coal gaugue con- crete has higher specific strength than ordinary concrete.

关 键 词：自燃型煤矸石 混凝土 配合比 抗压强度 正交试验 力学性能 

分 类 号：TU528.062[建筑科学—建筑技术科学]