... mine tailing, pearl stone, river sand, sea sand and so on.industrial waste:fly ash, coal gangue, waste slag, ceramsite, building ... corn stalk, cotton-stalk, bagasse,sawdust and so on.Product advantages1.Not containing formaldehyde, benzene and other harmful materials, green building materials ... cheap, it is 1/3 of cement tile,and 1/5 of color steel tile.3.Good effect of fire proof, dame proof, corrosion ...