concrete surfaces enclosing class waterproofing agent of some description

Concrete surfaces enclosing class waterproofing agent is applied to the concrete surface coated with a layer of a surface layer can penetrate into the pores of the hydrophobic manipulation of waterproof material , such as commonly used in China silicone waterproofing agent, waterproofing agent  Impact modifier for PVC like sodium silicate , and the use of foreign methacrylate monomer waterproof Qi carbazole vinegar and so on. 1 penetrate the surface of the closed water causes and mechanism of concrete seepage mainly due to external pressure , or as a result of which the pores of the concrete surface adsorbed water, or because of the combined effect of both . Pore ​​water is due  iron oxide yellow to the pores on the surface acting on the surface tension of water in the concrete grout generated driving force of the adsorbed water . Concrete interface between water and the contact angle of the meniscus is generally less than 90 degrees, the force to drive water into the pores ( as shown in Figure la ) , which can wet the surface . When using a  plastic processing aid certain way ( brushing, spraying , etc. ) in the surface layer of the concrete surface coating applied waterproofing agent enclosing class , due to water repellent and coagulation Rui Qian Zhu Xi air bundle wrapped in cloth which fluorine anxious when Chongqing a flute into the water " containing ) doors ,, (a) normal coagulation on the surface of the twist 90 ' ) ST 1 contact angle ( wetting of the surface of the concrete filling the pores of the soil and the water repellent composition of the reaction itself, or because of the chemical properties of the pores of the concrete ( micropores , pores , etc. ) and water contact angle is increased to more than 90 degrees ...