Of a thin

In the industry of prefabricated reinforced concrete parts, the following types of cements are used:

Portland cement (GOST 970-41)-a caring substance that is solid in water and in the air, is a product of a thin grinding of a port-cement clinker, obtained by firing a proper composition of the proper composition, providing a predominance of calcium silicates in the clinker. According to the standard, this cement has brands: “200”, “250”, “300”, “4i0”, “500” and “600”.