外墙外保温用化学发泡泡沫混凝土板的试验研究

Experimental research on foam concrete panel prepared with chemical method used in external wall external insulation system

低密度泡沫混凝土是一种可以替代传统有机材料用于外墙外保温的无机硅酸盐材料。在分析了化学发泡泡沫混凝土结构形成机理的基础上,试验研究了水泥品种、水灰比、矿物掺合料种类及掺量、有机胶、纤维等因素对化学发泡泡沫混凝土力学及热工性能的影响规律,并探讨了泡沫混凝土孔结构与性能的关系,指出独立封闭的泡孔、较高的孔壁机械强度、近似于球形的泡孔结构以及尺寸均匀且较小的孔径是泡沫混凝土强度提高的有利因素。

Low density foam concrete is an inorganic silicate material to replace traditional organic materials in external wall external insulation system.Based on the analysis of structure formation mechanism of foam concrete prepared with chemical method, the influence law of cement types,water cement ratio, mineral admixture types and mixing amount, fiber and polyacrylate emulsion on the mechanical and thermal perfor- rnance of foam concrete was experimental researched.Meanwhile, the relationship between foam concrete pore structure and its property was stud- ied.And further,independent sealing pores, high mechanical strength of pore wall,pore structure approximate to sphere and pore diameter with similar and. small size were all favorable factors for higher strength of foam concrete.