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无砂混凝土(又叫大孔混凝土)是由水泥、粗骨料(碎石、卵石、浮石等天然骨料或陶粒、烧结块等人造轻骨料)和水拌制而成的。国内外无砂混凝土主要用作住宅墙体。其优点是:1.容重小,约为有砂混凝土的2/3。石子大孔混凝土为1800kg/m~3,陶粒大孔混凝土1200kg/m~3。若用陶粒代石,则结构自重更可以降低。当基础结构不变时,可增建层数,从而降低了单位建筑面积造价中基础部分的费用。2.用大孔混凝土作墙体,可
No sand concrete (also known as large-pore concrete) is made of cement, coarse aggregate (crushed stone, pebbles, pumice and other natural aggregates or ceramsite, agglomerated blocks, and other artificial light aggregates) and water. Domestic and foreign sand free concrete is mainly used as a residential wall. Its advantages are: 1. Small weight, about 2/3 of sand concrete. Stone large hole concrete is 1800kg/m~3, ceramic macroporous concrete 1200kg/m~3. If ceramsite is used for stone, the weight of the structure can be reduced. When the infrastructure is unchanged, the number of floors can be increased, thereby reducing the cost of the basic part of the cost per floor area. 2. Use big hole concrete as wall,