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17.YJ弹性粉-聚酯树脂的减缩剂和增韧剂以不饱和聚酯树脂为胶结料的聚合物砂浆,具有良好的和易性、耐硝酸、氢氟酸稳定性,且价格低。但是,由于聚酯树脂固化过程中物理化学变化的结果,聚酯砂浆的收缩率和脆性均较环氧砂浆严重,其中收缩率约为环氧砂浆的5～6倍,进而导致内应力偏大,抗裂性能较差,因而在施工聚酯砂120～150浆整体无缝面层时,或在使用过程中由于温度
17. YJ elastic powder-reducing agent and toughening agent of polyester resin The unsaturated polyester resin is a polymer mortar with good workability, resistance to nitric acid and hydrofluoric acid, and low price. However, due to the physical and chemical changes in the curing process of the polyester resin, the shrinkage and brittleness of the polyester mortar are more severe than that of the epoxy mortar. The shrinkage rate is about 5-6 times that of the epoxy mortar, and the internal stress is larger. , The anti-cracking performance is poor, so when the construction of polyester sand 120 ~ 150 slurry seamless surface, or in use due to temperature