Waterproof mortar has good weather resistance, durability, impermeability, compactness, extremely high adhesion, and strong waterproof and anti-corrosion effects. Can withstand the corrosion of soda ash production media, urea, ammonium nitrate, seawater hydrochloric acid, and acidic and alkaline salts. It is mixed with ordinary cement and special cement to form cement mortar, which is cast or sprayed by blending cement mortar, and manually applied to form a strong waterproof and anti-corrosion mortar layer on the concrete and surface. It is a rigid and tough waterproof and anti-corrosion material. Mixing with cement and sand can modify the mortar, which can be used for the treatment of building walls and floors, as well as underground waterproofing layers.
The cement paste prepared by adding water to cement and the cement mortar prepared by cement, sand, and water are layered and alternately pressed and compacted, so that most of the capillary channels in each layer are cut off, and the remaining small number of capillary pores cannot form a continuous permeable pore network. The hardened waterproof layer has high waterproof and anti-seepage performance.
Various waterproofing agents are added to cement mortar to improve its waterproof performance. Commonly used waterproofing agents include chloride metal waterproofing mortar, ferric chloride waterproofing mortar, metal soap waterproofing mortar, and ultra early strength agent waterproofing mortar.
A light yellow liquid prepared by mixing metal salts such as calcium chloride and aluminum chloride with water in a certain proportion, and added to cement mortar to interact with cement and water. During the solidification and hardening process of mortar, compounds such as hydrated calcium chlorosilicate and calcium chloroaluminate are generated and filled in the gaps of the mortar to improve its density and waterproofing.
Ferric chloride waterproofing agent is mainly made from iron oxide scale, hydrochloric acid, and aluminum sulfate as raw materials. It is a dark brown solution and mainly composed of ferric chloride, ferrous chloride, and aluminum sulfate. The waterproofing agent is first diluted with water and then mixed with cement and sand to form a waterproof mortar with good waterproofing performance. The reaction between ferric chloride in mortar and calcium hydroxide precipitated during cement hydration produces calcium chloride and iron hydroxide colloids. Calcium chloride can stimulate the activity of cement and improve the strength of mortar, while iron hydroxide colloids can reduce the water separation of mortar and improve its compactness.
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