Five basic conditions for choosing waterproof coatings

Many people have vague knowledge about waterproofing. What kind of waterproof coating is a good material? This is the biggest problem encountered in waterproof engineering now, because waterproof coating is fundamental. If it is not done at all, the following work is only It can be in vain.

　　Waterproof material should meet 5 conditions:

　　1, coating performance should be fully utilized

　　Different waterproof coatings have their own strengths and shortcomings. Use their strengths while avoiding their weaknesses. For example, high-density polyethylene geomembrane has poor flexibility and is difficult to use in roof waterproofing. But it has high strength and strong root puncture resistance. It has a width of up to 7m and can be welded. These advantages are just for the waterproofing of large garbage landfills and rivers and lakes. Other materials cannot be replaced.

　　 The performance of cement-based propionic acid waterproof coatings is not as good as polyurethane coatings, but acrylic coatings can be applied on wet bases, while polyurethane coatings cannot.

　　2, the physical properties of the waterproof coating are better

　　Physical properties such as tensile strength, elongation at break, water impermeability, high temperature resistance, flexibility, and natural aging resistance can reach the national standards. In addition, there is also the construction operability, that is to say, it is simple and convenient, does not generate gas that damages the construction, and has many advantages and few disadvantages compared with other waterproof materials. Such materials are considered good materials.

　　3, match the importance of the building

　　 The high-quality and high-priced SBS modified asphalt coils and EPDM rubber coils are good materials for first- and second-level construction, and they are used for low-end construction. Such as construction sheds, short-term warehouses, disaster relief sheds, etc., to be demolished after one or two years, using high-quality paint is a waste.

　　4. Good adaptability to building parts

　　 Different types of waterproof coatings have different adaptability to different building parts. Coiled material is used to pave a large area of u200bu200bwaterproof parts, which is quick to construct and easy to ensure quality. However, it is useless for waterproofing in the toilet and bathroom, and waterproof coating is a handy material. Rigid waterproof materials are used in structurally stable parts with no vibration and deformation, such as basement wall and floor waterproofing as a waterproofing process, but if used for bridges and large-span roof waterproofing, the effect is poor, heavy and waste materials.

　　 5. Pay attention to the operability of construction

　　 Some waterproof materials have good physical properties, but they are difficult to construct and operate. Such as anti-adhesive coiled materials, it is difficult to seal the joints, and powdery materials are difficult to spread evenly, and it is more difficult to seal them when exposed or spread.