利用矿山尾矿制作蒸压砖的试验研究

Experimental study on making autoclaved brick using mill tailings

对利用矿山尾矿制作蒸压砖进行可行性试验研究,制得蒸压砖的密度为1900～2000kg/m3,原料配比为m(尾矿)∶m(石灰)∶m(石膏)=78∶20∶2,水灰比为0.15,蒸压制度:升温2h、恒温12h、自然降温3h,成型压力25MPa,抗压强度检测结果为:单块最小值为15.2MPa,平均值为17.5MPa,达到GB 11945—1999《蒸压灰砂砖》标准规定的MU15级砖的要求。

Feasibility and experimental study is made for making autoclaved brick using mill tailings and obtained autoclaved brick with density of 1900-2000 kg/m^3,raw materials proportioning of m （tailings） ：m （lime） ：m （gypsum） =78：20：2,water-eement ratio of 0.15, autoclave＇system：temperature rise 2 h,constant temperature 12 h. natural cooling down 3 h, forming pressure 25 MPa. The result of compression strength test is as follows： the minimum value of single brick 15 2 MPa, average value 17.5 MPa that is up to the requirement of MU15 brick stipulated in national standard of GBl1945-1999 ＂Autoclaved Sand Lime Brick＂ ：