Advantages and disadvantages of silane impregnant and epoxy coating

Advantages of silane impregnation silane impregnants can be divided into liquid (isobutyl triethoxysilane) and paste (isooctyl triethoxysilane). Commonly used liquids are colorless and transparent, and are naturally absorbed when sprayed on the concrete surface. Depending on the grade of concrete, it can be immersed in the surface layer for several millimeters to more than ten millimeters. Its main advantages are: (1) simple construction and easy control of construction period; After silane impregnation, other coatings can still be applied without affecting the adhesion. (2) Hydrophobic, alkali-resistant, acid-resistant, rain-resistant and ultraviolet-resistant, to prevent cracking and peeling caused by freezing and weathering. It chemically bonds with the base material to form a long-term stable protective layer, which prolongs the life of the coagulation structure by more than 15-20 years and reduces the cost of subsequent maintenance. (3) Maintaining the natural appearance of concrete, without affecting the surface color, preventing the surface blackening and microbial growth caused by mold breeding, which is beneficial to the neatness of municipal buildings and structures and the improvement of urban appearance. Three. Disadvantages of Silane Impregnation The current silane impregnation process also has disadvantages: (1) The cost is relatively high, and the shrinkage material for concrete surface construction is about 40 ~ 60 yuan/m2. Because it is a patented technology product, it was first introduced from abroad. As a high-quality and difficult-to-produce product, silane impregnating machine has very strict technical requirements. There are few domestic manufacturers. I believe that with the continuous popularization in the future, the use cost will be reduced and the application will be more extensive. (2) If cracks appear on the concrete surface, moisture or moisture enters, and silane loses its waterproof function, so the width of cracks on the surface of components shall be strictly controlled. (3) The products and brands on the market are uneven, the professional institutions for material testing and witness sampling testing are not popular, and the professional engineers and technicians for testing are lacking.