EFFECTS OF SOME SILICONATES ON MOLDING AND PROPERTIES OF EXTRUDED ASBESTOS-CEMENT PRODUCTS

The effects of some siliconates on the moulding and properties of extr uded asbestos cement products were studied. Tests on the homogenized m ixtures were made with a Netzch plasticimeter, an adiabatic calorimete r, a hydraulic press, etc. The results yielded values of extrusion res istance, tensile strength, hydration indices, compressive strength and bending strength after 7 and 28 days. It was shown that the presence of siliconates lowers the extrusion resistance, but increases the indu ction period and the speed of the hydration process. Asbestos modifica tion by siliconates therefore appears prospective and effective in the production of extruded fibrous cement products.