用石英尾砂制备蒸压加气混凝土

Preparation of Autoclaved Aerated Concrete with Silica Tails

利用秦皇岛鑫华玻璃厂的石英尾砂制备石英尾砂-水泥-石灰体系蒸压加气混凝土,在石英尾砂粉磨至比表面积为321.57 m2/kg,4种原料石英尾砂、石灰、水泥、脱硫石膏的质量比为65∶20∶10∶5,铝粉膏加入量为原料总量的0.06%,水料比为0.57,拌和水温为55℃,静停养护温度和时间分别为50±2℃和4 h,蒸养压力、温度、时间分别为1.25 MPa、185℃、12 h的条件下,制品的强度达到A3.5级,干密度达到B06级。X射线衍射分析和场发射扫描电镜分析结果显示,制品中主要水化产物为托贝莫来石和C-S-H凝胶。

The autoclaved aerated concrete（AAC） of silica tails,cement and lime is prepared with the silica tails from Qinhuangdao Xinhua Glass Factory.Under the conditions of specific surface area of 321.57 m^2/kg by grinding of quartz tailings,the mass ratio of 4 kinds of raw materials quartz tailing,lime,cement and desulfurized gypsum 65∶20∶10∶5,aluminum powder addition with total raw materials of 0.06%,the water ratio 0.57,the mixing water temperature at 55 ℃,the static curing temperature at 50±2 ℃ for 4 h,and the steam curing pressure,temperature and time of 1.25 MPa,185 ℃ and 12 h respectively,the strength of the product reaches A3.5 level and its dry density is at B06 level.X-ray diffraction analysis and field emission scanning electron microscopy analysis indicate that the main hydration masses in the product are tobermorite and C-S-H gel.