摘要
结合压制成型和传统的烧结砖工艺，实验以城市生活污泥、黄河淤泥、煤矸石及砂为原料，制备渗水铺地砖。通过正交试验得到最优工艺参数为w（黄河淤泥）：w（煤矸石）：w（污泥）：w（砂）=33％：22％：15％：30％、成型压力为20MPa、烧结温度为1100℃、保温时间为1．5h，骨料砂的粒径为1～2mm。制备的成品抗压强度为21．8MPa，渗水系数为1．03×10^-2cm／s。并对成型压力及烧结温度对渗水砖抗压强度及渗水系数的影响进行了讨论。
Based on taking shape in pressure and traditional fired bricks process, water permeable bricks were produced with municipal sewage sludge, Yellow River sludge, coal gangue and sand which used in coarse aggregate. Through orthogonal test and range analysis, it was concluded that 15% sludge, 33% Yellow River sludge, 22% coal gangue and 30% sand in grain size of 1 -2 mm under a molding pressure of 20 MPa and a sintering condition of 1 100 ℃ for 1.5 h could generate a brick with a compressive strength of 21.8 MPa and a permeability of 1.03 × 10 ^-2 cm/s. Then the effects of forming pressure and sintering temperature on compressive strength and water penetration ration were discussed.
出处
《环境工程学报》
CAS
CSCD
北大核心
2008年第12期1691-1694,共4页
Chinese Journal of Environmental Engineering
关键词
污泥
抗压强度
渗水系数
sludge
compressive strength
permeability
