1.用料要求 瓷砖要求表面无隐伤、边缘整齐、楞角无损伤、板面平整无翘曲、表面色泽一致。水泥质量不得低于325号矿渣硅酸盐水泥或普通硅酸盐水泥;如用小窑水泥应抽样试验安定性。砂宜用中砂,使用前应过5毫米孔径筛,含泥量不得大于3％。石灰膏应用淋化滤浆后熟化的石灰膏,不得含有未熟 1. Material requirements Tiles require no surface damage, neat edges, no damage to the horns, flat surface without warping, the same surface color. The quality of cement shall not be lower than slag portland cement No. 325 or ordinary portland cement; if using small kiln cement, the stability of the sample shall be tested. Sand should be used in sand, should be used before the 5 mm aperture sieve, the mud content shall not exceed 3%. Lime Paste Applying lime paste after leaching and sifting, must not contain unripe