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The titled high performance foamed concrete was developed from Portland cement,ultra fine granulated blast-furnace slag,pulverized fly ash and condensed silica fume by means of pre-foaming process.The resultant foamed concrete presents its thermal conductivity of about 0.16-0.75 W/(m ℃)and 28 d compressive strength of about 1.1-23.7 MPa when its mix proportion varies in the range of cement content 280 kg-650 kg/m3,fly ash 42-97 kg/m3,slag 64-146 kg/m3,silica fume 34-78 kg/m3,and sand 0-920 kg/m3. The compressive strength of the foamed concrete with oven dried bulk density of 1500 kg/m3 in appropriate mix proportion and with small amount of superplasticizer reached as high as 44.1 MPa.Meanwhile,the fresh foamed concrete behaves like an excellent flow-ability,therefore,is especially suitable for the application in case of massive foamed concrete casting in situ and in the case of filling casting into large volume underground irregular voids,except for pre-casting of building components like blocks,bricks,and wall panels.
The titled high performance foamed concrete was developed from Portland cement, ultra fine granulated blast-furnace slag, pulverized fly ash and condensed silica fume by means of pre-foaming process. The resultant foamed concrete presents its thermal conductivity of about 0.16-0.75 W / (m ° C) and 28 d compressive strength of about 1.1-23.7 MPa when its mix proportion varies in the range of cement content 280 kg-650 kg / m3, fly ash 42-97 kg / m3, slag 64-146 kg / m3 , silica fume 34-78 kg / m3, and sand 0-920 kg / m3. The compressive strength of the foamed concrete with oven dried bulk density of 1500 kg / m3 in the appropriate mix proportion and with small amount of superplasticizer reached as high as 44.1 MPa.Meanwhile, the fresh foamed concrete behaves like an excellent flow-ability, therefore, is especially suitable for the application in case of massive foamed concrete casting in situ and in the case of filling casting into large volume underground irregular voids, except for for pre-casting of building components like blocks, bricks, and wall panels.