Is it necessary to add 2 times of alkali resistant fiberglass mesh on the first floor?
The current national standard of exterior insulation technology (JG149-2003): fiberglass mesh fabric warp and weft tensile strength of not less than 750N/50mm alkali resistant tensile strength retention of 50%, weight more than 130 grams per square meter of.JG158-2004 glass fiber mesh cloth base warp and weft tensile strength shall not be less than 1250N/50 mm, the tensile strength retention rate is not alkali resistant less than 90%, weight more than 160 grams per square meter.This is China market exterior wall external thermal insulation system net weight per square meter is about 130g, the intensity is generally low, the normal anti fracture strength of 1000N/5cm, or even lower. Therefore: requirements for Standardization Technical Indexes of grid exterior insulation, before use should be alkali resistant glass fiber mesh purchase qualification. Insulation materials, exterior control insulation cracks not only have a certain tensile strength and ultimate tensile cracking resistance protective layer material, but also need to have sufficient tensile strength. Therefore, alkali resistant fiberglass mesh selection, need concentration of alkali resistant glass fiber mesh cloth, the tensile strength is in compliance with the standard.Two, the use of alkali glass fiber net composite in mortar, on the one hand, can effectively increase the tensile strength of the protective layer, on the other hand, can effectively disperse the stress or may have spread into many small cracks wide cracks, thus forming the anti cracking effect. Has important significance of alkali resistance glass fiber mesh the surface coating material and coating amount, and alkali resistant glass fiber long-term variety of decisive.
Alkali resistant glass fiber mesh cloth, external wall external insulation layer of reinforced materials, the main role is to: improve the mechanical strength of the surface layer, in order to ensure the continuity of the surface resistance of the surface layer of the dispersed shrinkage of the pressure and stress of insulation, to avoid stress concentration caused by the surface properties and anti crack. The changes of temperature and humidity, unexpected effects. Play an important function and role in the system of the alkali resistant glass fiber mesh insulation, an important part of the selection of the glass fiber net exterior insulation system is also a very good quality.
1. glass fiber mesh cloth is the worst market price is usually around 1 yuan -1.60, glass fiber is usually made of clay crucible drawing glass beer bottle some kind of waste? Forbidden state in the production process, the surface coating resistant to alkali emulsion. Intuitively: rough sales of more general market theory, often not long enough the weight is less than 2 times, with no sound easy to shift, easy to hurt the skin. This type of network is used in the insulation layer is generally two months after losing power, if the mortar net downed just gently removed, grinding, glass fiber yarn into powder.
