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

发布时间：2018-05-24 16:38

本文选题：碱激发矿渣 + 膨润土　；参考：《东南大学学报(自然科学版)》2016年S1期

【摘要】：采用碱激发矿渣-膨润土系隔离墙材料以研究其施工和易性及强度特性,并研究其满足可二次开发利用的污染场地条件下的工程特性,在不同砂土比、碱激发矿渣掺量、膨润土掺量以及不同龄期条件下进行了坍落度、无侧限抗压强度和直剪试验.坍落度试验结果表明,标准坍落度Ss与迷你坍落度Sm之间具有线性关系,满足施工和易性要求的含水率范围所对应的迷你锥坍落度为25.5~75.5 mm.无侧限抗压强度试验结果表明,无侧限抗压强度qu随养护龄期增长和碱激发矿渣掺量增大而增大,而膨润土掺量对无侧限抗压强度影响微小.直剪试验结果表明,随着养护龄期由14 d增长至28 d、碱激发矿渣掺量由5%增大到15%,黏聚力显著增加,内摩擦角降低,而膨润土掺量对内摩擦角影响较小.
[Abstract]:In order to study the construction, easiness and strength characteristics of the wall material of slag bentonite system excited by alkali, and to study its engineering characteristics under the condition of secondary development and utilization of polluted site, the slag content is stimulated by alkali at different sand / soil ratios. The slump, unconfined compressive strength and direct shear tests of bentonite were carried out under the conditions of bentonite content and different ages. The results of slump test show that there is a linear relationship between standard slump S _ s and mini-slump S _ m, and the slump of mini-cone corresponding to the range of moisture content that meets the requirements of construction and ease is 25.5 ~ 75.5 mm. The results of unconfined compressive strength test show that the unconfined compressive strength increases with the increase of curing age and the amount of alkali-activated slag, while the content of bentonite has little effect on the unconfined compressive strength. The results of direct shear test show that with the increase of curing age from 14 days to 28 days, the amount of alkali-stimulated slag increases from 5% to 15, the cohesion increases significantly and the angle of internal friction decreases, while the amount of bentonite has little effect on the angle of internal friction.
【作者单位】：东南大学岩土工程研究所;东南大学江苏省城市地下工程与环境安全重点实验室;
【基金】：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)
【分类号】：X505

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