石棉瓦的制作技术
Making technology of asbestos tile
石棉水泥瓦是利用石棉纤维与水泥为原料经制板加压而成的屋顶防水材料，从规格上共分为大波,中波,小波三种,此外还有分别与这三种瓦配套的覆盖屋脊用的人字形背瓦。石棉瓦的特点是单张面积大，有效利用面积大，还具有防火、防潮、防腐、耐热、耐寒、质轻等特性，而且制作生产简便，造价低，用途广， [1]  其规格见下表1、配方配方 （1）重量份高强度 普通水泥50；细黄砂40；石棉纤维10；配方（2）中强度 普通水泥35；细黄砂60；石棉纤维5；2、配制与制作方法（1）首先准备好各种规格波型瓦模型、塑料布、铁抹子等工具及工作……石棉瓦的历史：石棉瓦最早是崇庆县(现在是崇洲市)白马乡3大队的一潘姓农民，在做大瓦容易烂的情况下，加上麻丝做成最初的石棉瓦。因为当时大瓦在农村比较实用。然后经过潘姓的改进，用了石棉，玻纤，在80年代初石棉还比较贵，一般都用玻纤，所以也叫玻纤瓦。在84，85年间潘姓家族到全国各地去做瓦，在此之后石棉瓦全国风靡。
Asbestos cement tile is a rooftop waterproof material made of asbestos fiber and cement as raw material, and it is divided into three kinds of large wave, medium wave and wavelet from the specifications. In addition, there are human shaped back tiles covering the roof of the roof of the three kinds of tiles. The features of asbestos tile are large area, large area, fire protection, moisture proof, anticorrosion, heat resistance, cold resistance and light quality. The production is simple, low cost, and wide use. [1] specifications see below table 1, formula formula (1) weight, high strength ordinary cement 50, fine yellow sand 40, asbestos fiber 10 In the formula (2), the strength ordinary cement 35, the fine yellow sand 60, the asbestos fiber 5; 2, the preparation and making method (1) first prepared various specifications of wave type tile model, plastic cloth, iron Bush and other tools and work... The history of asbestos tile: the earliest asbestos tile was a farmer in the 3 brigade of Baima Township, Chong Qing county (now Chong Zhou City). In the case of making big tiles easily rotten, it was made of hemp silk to make the initial asbestos tiles. Because it was out in the countryside is more practical. Then, after the improvement of Pan's name, asbestos and glass fiber were used. In the early 80s, asbestos was still more expensive. Generally it was made of glass fiber, so it's also called glass fiber tile. In 84, 85 years to the country to do Panxing family after asbestos tile, the popular.