Research on various Drymix mortar additives

The cement-based permeable crystalline waterproof coating is a powdery material prepared from ordinary Portland cement, fine sand, and various active chemical substances. Osmotic crystallization is carried out through the crystallization water of the hydration reaction and capillary action. These active substances play a catalytic activation role, promoting the rapid formation of crystallization on the surface and gradually penetrating the interior through the capillary pores of the surface layer. The free ions in concrete and mortar react with each other to form crystalline objects insoluble in water. It enhances the interfacial bonding force among aggregates, improves the internal microstructure of mortar and concrete, improves the compactness and impermeability of concrete, and essentially solves the cracking and penetrating problems caused by the unstable volume of ordinary concrete and mortar structures.

(1) Advantages and characteristics

1) Osmotic crystallization, permanent waterproof;

2) The waterproof function of the facing water and the backwater is the same;

3) It has a secondary anti-seepage function and can still maintain good water resistance and chemical corrosion resistance even if the surface is damaged;

4) It can increase the compressive strength of mortar;

5) It has a micro-expansion function to prevent micro-cracks due to volume shrinkage;

6) When backfilling, no special protection is required;

7) The construction is quick, and there is no special requirement for the base surface;

8) Good chemical erosion resistance, such as resistance to seawater, groundwater, chloride, sulfate, and carbonic acid, non-toxic and tasteless, in line with environmental protection requirements.

(2) Scope of application

The cement-based permeable crystalline waterproof coating is suitable for tunnels and foundation projects, water towers, pools, kitchens and bathrooms, basements, interior and exterior walls, aquariums, sewage, water storage projects, swimming pools, dams, and bridges.