粉煤灰对垃圾填埋场黄土垫层的改性试验_曾正中.pdfVIP

　　　 2009 8 27 4 105 ＊ 曾正中　马力鹤　南忠仁 (, 730000) :通过击实、渗透试验得到粉煤灰改性-黄土的最佳配比为10%。 对压实黄土和压实粉煤灰改性-黄土, 分别用 清水和渗 液进行室内渗透试验, 结果表明:渗 液在压实粉煤灰改性黄土中的渗透系数≤1.0×10-7 cm s, 在压实黄 土中的渗透系数≤1.0×10-5 cm s, 前者可作为填埋场防渗垫层, 后者可作为填埋场防渗保护垫层。 对COD、NH -N 的 3 去除效果前者优于后者。 :粉煤灰改性黄土;压实黄土;渗透系数;渗 液 A TEST OF FLY-ASH MODIFIED LOESS OF LANDFILL LINER MATERIAL Zeng Zhengzhong　Ma Lihe　Nan Zhongren (College of Resource and En ironmental Sciences, Lanzhou Uni ersity, Lanzhou 730000, China) Abstract:It has been found that the better fly-ash modified loess liner could be achie ed while fly-ash filling rate is 10% by the compacting and permeability tests.Two laboratory permeability tests ha e been done for tap water and leachate infiltration, respecti ely.One was for the compacted loess, and the other for the compacted fly-ash modified loess.The findings indicated that the permeability of leachate in the compacted fly-ash modified loess could be less than 1.0×10-7 cm s, and also less than 1.0×10-5 cm s when in compacted loess.The former can be used as the landfill liner, and the latter the landfill protecti e liner.Furthermore, the remo al efficiency of COD and NH -N of the former was better than that of the latter. 3 Keywords:fly-ash modified loess;compacted loess;permeability coefficient;leachate 0　 , , 、、 , , 、、 4.8×10-4 ～5.8×10-5 cm s[4] 。 [1] 、 。, , , , ; , 、