Hydraulic Conductivity of Soil-Bentonite Cutoff Walls Constructed at the Ground Containing Cement Stabilized Soil
Because of high deformability even after construction,soil-bentonite(SB)cutoff walls,which are constructed by blending slurry and powder bentonite with in situ soil,are occasionally conjunct with soil-cement(SC)walls or cement stabilized soil having relatively high strength in the case that both strength and barrier performance is partly required.In this study,barrier performance of SBs containing cement at different proportions was experimentally evaluated using a flexible-wall permeameter.Specifically,SCs made with cement proportions of 100,300,500 kg/m3 were crushed after certain periods of curing time and used as a parent material of SBs.Experimental results demonstrate that hydraulic conductivity of SB containing cement can sufficiently decrease with time when bentonite is blended three hours after cement addition,while barrier performance of SB is insufficiently high when bentonite is added after 7-day and 28-day curing.Thus,a bentonite powder content of 100 kg/m3,which is a conventional proportion for construction of SB walls,is insufficient when cement stabilized soil exists in the ground.
Bentonite Containment Cement Hydraulic conductivity
Atsushi Takai Kazuki Yamaguchi Toru Inui Takeshi Katsumi
Kyoto University,Yoshida-honmachi,Sakyo-ku,Kyoto 6068501,Japan
国际会议
The 8th International Congress on Environmental Geotechnics(第八届国际环境土工大会)
杭州
英文
558-566
2018-10-28（万方平台首次上网日期，不代表论文的发表时间）