碱激发高炉矿渣固化铅污染土酸缓能力、强度及微观特性研究

伍浩良; 薄煜琳; 杜延军; 魏明俐; 薛强

doi:10.11779/CJGE2019S1035

碱激发高炉矿渣固化铅污染土酸缓能力、强度及微观特性研究 English Version

伍浩良^{1, 2},
薄煜琳^{1, 2},
杜延军^1,2, ,,
魏明俐³,
薛强³

1. 东南大学江苏省城市地下工程与环境安全重点实验室,江苏南京 210096;
2.东南大学交通学院岩土工程研究所,江苏南京 210096;
3. 中国科学院武汉岩土力学研究所,岩土力学与工程国家重点实验室,湖北武汉 430071

基金项目: 国家自然科学基金重点项目（41330641）; 国家自然科学基金项目（41472258）; “863”计划项目（2013AA06A206）; 江苏省自然科学杰出青年基金项目（BK2012022）; 江苏省研究生创新项目（KYLX16_0242）; 东南大学优秀博士学位论文培育基金项目（YBJJ1735）

详细信息

作者简介:
伍浩良(1990—),男,博士研究生,主要从事环境岩土工程和高延性ECC研究。E-mail:wuhaoliang90@163.com。

通讯作者:
杜延军，E-mail：duyanjun@sedu.edu.cn

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出版历程
- 收稿日期: 2019-04-28
- 发布日期: 2019-07-14

Acid neutralization capacity, strength properties and micro-mechanism of Pb-contaminated soils stabilized by alkali-activated GGBS

WU Hao-liang^{1, 2},
BO Yu-ling^{1, 2},
DU Yan-jun^1,2, ,,
WEI Ming-li³,
XUE Qiang³

1. Jiangsu Key Laboratory of Urban Underground Engineering & Environmental Safety, Southeast University, Nanjing 210096, China;
2. Institute of Geotechnical Engineering, Southeast University, Nanjing 210096, China;
3. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China

摘要

摘要: 采用碱激发高炉矿渣对铅污染土进行固化稳定处理,并研究其固化稳定机理。结果表明：随着固化剂掺量提高,GGBS-MgO固化铅污染土酸缓能力的固化污染土酸缓冲系数β随之提高;铅能够抑制GGBS-MgO进行水化反应,致使GGBS-MgO固化铅污染土比表面积远低于同掺量的固化未污染土;GGBS-MgO固化铅污染土q_u均低于相同掺量下固化未污染土,且无侧限抗压强度与其比表面积间存在明显的线性关系;SEM和XRD结果显示,GGBS-MgO固化铅污染土和固化未污染土的试样,主要水化产物都为C-S-H与Ht;累积进汞量和孔径直径结果显示,GGBS-MgO固化未污染土累积进汞量高于固化铅污染土。
- 固化/稳定技术 /
- 碱激发高炉矿渣 /
- 酸缓冲能力 /
- 无侧限抗压强度 /
- 微观特性
Abstract: The Pb-contaminated soils stabilized by alkali-activated GGBS and the mechanism are researched. The results show that the acid capacity value ascended with the binder dosage increases for the contaminated-soils stabilized by GGBS-MgO. The specific surface area of soils stabilized by GGBS-MgO is higher than that of uncontaminated soil as the Pb inhibites the hydration reaction of GGBS-MgO. The strength of stabilized soils with GGBS-MgO is higher than that of uncontaminated ones, which has a liner relationship with the specific surface area. The SEM and XRD results indicate that the main hydration products of stabilized contaminated and uncontaminated soil are C-S-H and Ht and can be analyzed using the XRD methods. The accumulative mercury and pore diameter results show that the accumulative mercury mass of the stabilized uncontaminated soils is higher than that of the contaminated soils stabilized by GGBS-MgO.
- solidification/stabilization /
- alkali-activated GGBS /
- acid neutralization capacity /
- strength property /
- micro- mechanism

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参考文献(9)

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