多孔混凝土孔洞尺寸与分布状态对其性能的影响

The effect of holes size and distribution of porous concrete on its properties

多孔混凝土包括加气混凝土、泡沫混凝土和微孔混凝土,均为无机硅酸盐或水泥发泡材料。具有轻质、保温、隔热、防火等性能。主要用于建筑物墙体围护和外保温使用,也可用于屋面和地面保温。随着建筑保温材料防火性能要求的提高,水泥泡沫混凝土作为保温材料应用呈快速上升态势,但伴随出现的耐久性问题,保温效果保证度问题必须引起建设行业高度重视。以化学发泡制成的较大孔洞普通泡沫混凝土和快硬水泥物理发泡制成的微孔混凝土作为研究对象,通过实验,分析孔洞大小和分布状态对多孔混凝土密度、导热系数、吸水率的影响规律,为正确使用泡沫混凝土提供参考。

Porous concrete,including aerated concrete,foam concrete and cell concrete,are all foaming materials with inorganic silicate or cement.Having light,heat preservation,thermal insulation,fire resistance,it is primarily used for thermal insulation and retaining of the building wall,and can also be used for roof and floor insulation.With the improvement of fire performance requirements of building insulation,the application of cement foam concrete as the thermal insulation material shows a rapid upward trend.But with the emergence of durability problems,insulation effect degree of assurance problem must attach great importance to the construction industry.This paper mainly discusses ordinary foam concrete formed chemical foaming with bigger hole,and cell concrete formed by physical foaming with rapid hardening cement.By experiment,analyze the influence law of holes size and distribution to the porous concrete bulk density,thermal conductivity and water absorption,providing reference for the correct use of foam concrete.