Lightweight concrete roof tiles

摘要

Lightweight concrete roof tiles are produced by extruding a latex/cement/lightweight aggregates/water mix in a prescribed sequence. The composition comprises: (a) 45-65 parts by weight of an acrylic latex emulsion; (b) 130-180 parts by weight of a cement; (c) 360-400 parts by weight of expanded shale lightweight aggregates; and (d) 50-75 parts by weight of additional water. This lightweight concrete roof tile of the present invention is about half the weight and about the same strength, and absorbs the same amount of water of conventional roof tiles.