Cork flooring to buy like this

Whether the floor sanding surface is smooth, whether there is bulging particles, and whether the cork particles are pure.

Second, whether the length of the floor is straight or not is obtained by taking four identical floors, laying them on a glass plate, or on a relatively flat ground, and assembling them to see whether they meet each other.

Three test board bending strength, the method is to close the two diagonals of the floor, see if the curved surface cracks, no quality products.

Four bonding strength test: Put a small sample into open blisters, and found that the smooth surface of its sanding becomes suede-like, uneven surface, this product is unqualified product, quality product should not change significantly in case of boiling water .

Five-density selection: density is divided into three levels, the average family is 400-500kg/m3.

Nature Flooring Del Floor Glass

Silica Fume For Petroleum Cementing

This silica fume is added to cement used in oil cementing to isolate gas, water and oil layers in the borehole. Silica fume-added cement protects oil and gas well pipelines, increasing the life of the well and improving oil and gas production.

silica fume for petroleum cementing, silica ash for petroleum cementing, silica powder for petroleum cement

Chengdu Rongjian Engineering Materials Co.Ltd , https://www.rjsilicafume.com