今年,我厂石棉水泥小波瓦的质量有了很大提高,主要采取了以下措施: 一、降低湿坯水分湿坯水分越少,产品吸水率越小,容重越大,耐寒性能越好。如表1所示,湿坯水分降到23～24%,产品吸水率就降到19～21%左右,容重提高到1.62～1.70吨/m~3,耐寒性能試驗合格率提高到85%以上。 This year, the quality of the asbestos-cement compact wavelet of our plant has been greatly improved. The following measures have been taken: 1. Reducing the wet billet moisture The lower the moisture content of the wet billet, the lower the water absorption rate of the product, the greater the bulk density, and the better the cold resistance. As shown in Table 1, the moisture content of the wet greens dropped to 23-24%, the water absorption rate of the products dropped to about 19-21%, the bulk density increased to 1.62-1.70 tons/m-3, and the cold-resistance test pass rate increased to over 85%. .