Alkali fiberglass mesh cloth as a reinforcing material of the surface layer of exterior insulation, the main role is: To improve the mechanical strength of the surface layer, guarantee the resistance of continuity of the facing layer, dispersing the surface layer of the systolic pressure and insulation stress, to avoid stress concentration cracking of the surface resistance caused by nature, temperature, humidity changes and accidental impact. This alkali-resistant fiberglass mesh cloth outer insulation system plays an important function and role, and guarantee the quality of the exterior insulation system is also an important part of a good selection of fiberglass mesh. Current national exterior insulation and technical standards (JG149-2003): fiberglass mesh through to and zonal Alkali tensile fracture strength are not less than 750N/50mm, Alkali tensile breaking strength retention rate of not less than 50%, weighing ≥ 130 grams per square meter. And JG158-2004 fiberglass mesh warp and weft alkali tensile breaking strength shall not be less than 1250N/50 mm, alkali-resistant tensile breaking strength retention rate shall not be less than 90%, weight ≥ 160 grams per square meter. Current national exterior insulation and technical standards (JG149-2003): fiberglass mesh through to and zonal Alkali tensile fracture strength are not less than 750N/50mm, Alkali tensile breaking strength retention rate of not less than 50%, weighing ≥ 130 grams per square meter. And JG158-2004 fiberglass mesh warp and weft alkali tensile breaking strength shall not be less than 1250N/50 mm, alkali-resistant tensile breaking strength retention rate shall not be less than 90%, weight ≥ 160 grams per square meter.
For exterior insulation system in our local market mesh per square meter weight about 130g, the intensity is generally low, normal anti-fracture strength 1000N/5cm, or even lower. To this end: For the mesh exterior insulation technology indicators require standardized before use shall be made of alkali-resistant fiberglass mesh procurement qualified to confirm. Insulation material making exterior insulation cracks control requires not only have a certain tensile strength and ultimate tensile crack resistance protective layer material also requires sufficient tensile strength. To this end, the selection of the alkali-resistant fiberglass mesh, the need to focus on the tensile strength of the alkali-resistant fiberglass mesh cloth is in compliance with the standard.
The composite mortar of wiping the surface of the alkali the use of the fiberglass mesh, on the one hand, can be effective to increase the tensile strength of the protective layer, and the other hand, can effectively disperse stress originally wide cracks may be generated can be dispersed into many smaller cracks, thus forming crack resistance. Surface coating materials and coating amount of alkali resistance fiberglass mesh has important significance, while the the fiberglass variety of long-term alkali resistance decisive
