First, function and standard:

Alkali-resistant fiberglass mesh for the outer wall insulation layer of the strengthening material, the main role is to: improve the mechanical strength of the surface layer to ensure that the resistance of the finish layer continuity, the surface layer of the shrinkage stress and insulation stress, , Resistance to natural temperature and humidity changes and accidental impact caused by the surface layer cracking. This alkali-resistant fiberglass mesh in the external insulation system plays an important function and role, so the selection of good fiberglass mesh is to ensure that the overall quality of the external insulation system, an important part.

(JG149-2003): The warp and weft alkali-resistant tensile breaking strength of the fiberglass mesh shall not be less than 750N / 50mm, and the alkali-resistant tensile breaking strength retention rate shall not be less than 50%, per square meter of the outer wall thermal insulation technical standard (JG149-2003) M Weight ≥ 130 grams. The JG158-2004 fiberglass mesh warp and weft alkali tensile breaking strength shall not be less than 1250N / 50mm, alkali-resistant tensile breaking strength retention rate shall not be less than 90% per square meter weight ≥ 160 grams.

At present, China's market for the external wall insulation system mesh cloth per square meter weight of 130g or so, the strength is generally low, the normal resistance to fracture strength is only 1000N / 5cm, or even lower. To this end: external wall insulation for the project's grid layout of the technical indicators require standardization, the use of alkali-resistant fiberglass mesh before purchase to be qualified to confirm. In the external wall insulation control of the crack, not only requires insulation material must have a certain tensile strength and ultimate tensile, also requires anti-cracking protective layer material to have sufficient tensile strength. To this end, the use of alkali-resistant fiberglass mesh, it is necessary to pay attention to alkali-resistant glass fiber mesh itself is consistent with the standard tensile strength. 

Second, the compound in the plaster mortar in the use of alkali-resistant fiberglass mesh

On the one hand can effectively increase the tensile strength of the protective layer, on the other hand due to the effective dispersion of stress, can be originally possible to produce a wide crack into many smaller cracks, thus forming its crack. The surface coating material and the coating amount have important meaning to the alkali resistance of the fiberglass mesh cloth, and the glass fiber varieties have the decisive significance to the long-term alkali resistance. 

Fiberglass mesh in the use of the process:

Alkali between the grid layout of the lap width of not less than 50mm, the corners of the alkali-resistant mesh grid to be pressed stubble lap, the width ≥ 50mm, Yang angle at ≥ 200mm. In the construction, alkali-resistant grid layout to smooth, no wrinkles, mortar full degree of 100%, at the same time to smooth, find straight, to maintain the positive and negative angle of the Founder and perpendicularity.