建筑地面保温工程用全轻混凝土配制技术  

Preparation Technology of Full Lightweight Aggregate Concrete in Building Ground Thermal Insulation Engineering

作　　者：刘先锋[1,2] 彭家惠[2] 陈明政[1] 刘柳[1] 张建新[2,3] 

机构地区：[1]重庆科技学院建筑工程学院,重庆401331 [2]重庆大学材料科学与工程学院,重庆400045 [3]重庆建大建筑材料有限公司,重庆400030

出　　处：《硅酸盐通报》2016年第5期1632-1636,共5页Bulletin of the Chinese Ceramic Society

基　　金：重庆市教委科技项目(KJ1401315)

摘　　要：全轻混凝土用于建筑地面保温工程优势在于同时具有承重和保温性能,简化保温构造;但全轻混凝土配制过程中强度与密度或保温性能的矛盾是其推广应用的主要障碍之一。在优选陶粒基础上,采用外加剂增强和外掺料降低密度提高保温性能,配制出强度超过LC15、密度等级1000 kg/m^3、保温性能优良的全轻混凝土;其干表观密度1009 kg/m^3、抗压强度21.2 MPa、导热系数0.23 W/(m·K)、蓄热系数4.85 W/(m^2·K)、吸水率15%、软化系数0.88、28 d收缩值0.27 mm/m、内照射指数0.41、外照射指数0.67。Full lightweight aggregate concrete combines excellent strength and heat preservation performance, which simplifies thermal-insulated structure of building ground thermal insulation engineering.; but the strength is at odds with density and insulation performance which is One of the main obstacles to popularization and application of full lightweight Aggregate Concrete in Building Ground Thermal Insulation Engineering. Adding admixture to improve strength and Adding admixtures to reduce density are researched in full lightweight aggregate concrete with optimized lightweight aggregate. The results show that its strength far outstrips LC15,density level meets 1000 kg / m^3,and its insulation performance is outstanding; the apparent density is 1009 kg / m^3,the compression strength is 21. 2 MPa,the thermal conductivity is 0. 23 W /（ m · K）,the thermal storage capacity is 4. 85 W /（ m^2·K）,the water absorption is 15%,the coefficient of softness is 0. 88,28 d systolic value is 0. 27 mm / m,the internal exposure index is 0. 41,the external exposure index is 0. 67.

关 键 词：全轻混凝土 建筑地面 保温 强度 密度 

分 类 号：TU528[建筑科学—建筑技术科学]