关键词: 火山渣;发泡混凝土;实心自保温砌块;抗压强度

Abstract: The solid self-insulation block is prepared by volcanic scoria foamed concrete, and the hole rate is zero.The volcanic scoria size,content of volcanic scoria,the dosage of modifier on the properties of volcanic scoria foamed concrete were discussed in this paper.The results show that as the volcanic scoria size grows, the coefficient of heat conductivity of foamed concrete gradually decreases, but the comprehensive strength decreases.Considering the correlation between volcanic scoria size and the properties of foamed concrete,and the processing cost of volcanic scoria,the appropriate volcanic scoria size is 3-5 mm.For B06,B07 and B08 grade foamed concrete,when the cement content is certain, as the volcanic scoria content increases gradually, the compressive strength of foamed concrete gradually decreases.Based on the compressive strength, the optimum proportion of the A2.5, A3.5 and A5.0 grade solid self-insulation block prepared by volcanic scoria foamed concrete is proposed.The heat transfer coefficient of self-insulation block masonry is calculated about 0.37-0.87 W/(m2· K).

Key words: volcanic scoria;foamed concrete;solid self-insulation block;compressive strength