... a kind of new and safe environmental protection calcium silicate board,which adopts the latest technique,is 100% asbestos free. ... functions and represents the outstanding function of the calcium silicate board. It can be used in many kinds of suspended ... sport facility,textile factory,Engine room Physical propertyRaw material:Tobermorite,cement,Quartz sand,pulpBore diameter:5,6,8,10mmPerforation rate: ...