Glass fiber mesh is a commonly used thermal insulation reinforcement material for modern building exterior walls, and the breaking strength and alkali resistance are important properties of constant glass fiber mesh. The breaking strength of glass fiber cloth is inseparable from the glass count or weight. Domestic product standards require that the weight of fiberglass mesh per square meter should be more than 160g (120g is the mainstream in the market, and the cost is low).
In the process of using glass fiber mesh, it is necessary to improve the breaking strength standard. In particular, polymer cement plastering mortars with higher cement content and cement strength grades. The damage of these things to the glass fiber mesh is not only chemical corrosion, but also the crystallization pressure corrosion of calcium hydroxide and calcium sulfoaluminate. At the same time, the higher water absorption rate of mineral materials also has an adverse effect on the fiberglass mesh. Experiments show that after soaking in distilled water, the strength of glass fiber mesh will lose about 30%.
The cement-free pure polymer plastering mortar has no alkali corrosion and low water absorption, and the glass fiber mesh can function normally for a long time in it, which is undoubtedly very safe for the long-term crack resistance of the protective surface layer.