东南大学学报（自然科学版）2016，Vol.46Issue(z1)：25-30,6.DOI:10.3969/j.issn.1001-0505.2016.S1.005
碱激发矿渣膨润土系竖向隔离墙体材料施工和易性及强度特性
Workability and strength characteristics of alkali-activated slag-bentonite backfills for vertical slurry cutoff wall
摘要
Abstract
MgO-activated slag and bentonite ( GMB) is used to research the workability and strength performance of vertical slurry cutoff wall. And engineering characteristics of GMB cutoff wall meet-ing the requirements of redevelopment and utilization of contaminated site are studied. The slump tests, unconfined compressive strength test and direct shear test are conducted under different sand-soil ratio, MgO-activated slag dosage, bentonite dosage and different curing time. The slump test re-sults show that the standard slump Ss and the mini slump Sm of GMB backfill have a linear relation-ship. When the value of mini slump is in the range of 25. 5 to 75. 5 mm, the GMB backfill is able to meet its construction workability requirements. The unconfined compressive strength test results show that the qu values of GMB specimens increase with the curing time and the content of MgO-activated slag increasing, while the content of bentonite puts insignificant impact on qu. The direct shear test results show that the cohesive force of GMB specimens increases remarkably and the friction of GMB decreases when the curing time changes from 14 d to 28 d and the content of MgO-activated slag in-creases from 5% to 15%, while the content of bentonite has little effect on the friction.关键词
碱激发矿渣/膨润土/隔离墙/工程特性Key words
alkali-activated slag/bentonite/cutoff walls/engineering characteristic分类
建筑与水利引用本文复制引用
伍浩良,杜延军,王菲,梅丹兵,冯亚松..碱激发矿渣膨润土系竖向隔离墙体材料施工和易性及强度特性[J].东南大学学报（自然科学版）,2016,46(z1):25-30,6.基金项目
国家自然科学基金重点资助项目(41330641)、国家自然科学基金资助项目(51278100,41472258)、国家高技术研究发展计划(863计划)资助项目(2013AA06A206)、江苏省自然科学基金资助项目(BK 2012022)、江苏省普通高校研究生科研创新计划资助项目(KYLX16_0242) （41330641）
