... , sand , stone dust and others ) ,through making the material small for example sand,they can be used directly if has enough ... . then produce Hydrogen to make the concrete slop to expanding or swell,foam . Next , put them into the curing room to ... 0.9-0.22W/(mk),the same as 1/4 or 1/5 of clay brick ,so it is best materials ... mu,save burning clay brick 5 mu . Good tilting table machine for AAC plants