Stabilization/solidification characteristics of organic clay contaminated by lead when using cement

被引：75

作者：

Pan, Yize ^{[1
,2
,3
]}

Rossabi, Joseph ^{[3
]}

Pan, Chonggen ^{[2
]}

Xie, Xinyu ^{[1
,2
]}

机构：

[1] Zhejiang Univ, Res Ctr Coastal & Urban Geotech Engn, Hangzhou 310058, Zhejiang, Peoples R China

[2] Zhejiang Univ, Ningbo Inst Technol, Ningbo 315100, Zhejiang, Peoples R China

[3] Northwestern Univ, Dept Civil & Environm Engn, Evanston, IL 60208 USA

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2019年 / 362卷

关键词：

Stabilization; Strength; Lead leaching; Humic acid; Fulvic acid; SOIL; SOLIDIFICATION/STABILIZATION; REMEDIATION; ADDITIVES; ELEMENTS; WASTE; ACIDS; PB;

D O I：

10.1016/j.jhazmat.2018.09.010

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Research about cement treated soil has examined various characteristics of strengthened and stabilized soil, but has mainly focused on either the unconfined compressive strength or potentially toxic element (PTE) stabilizing results respectively in response to cement dosing. This study investigates how factors including cement concentration, lead concentration, humic/fulvic acid content and curing age affect these two geotechnical and environmental characteristics. A laboratory study was conducted to measure unconfined compressive strength, and lead leaching under several test conditions. Knowing that humic acid and fulvic acid can weaken cementation in cement treated soil but can stabilize PTEs such as lead by different chemical reactions, it was found that the acids generally reduce lead stabilization in cement treated soil. In addition, the stabilized strength reaches a peak at a specific lead content in soil. Finally, scanning electron microscopy was used to observe more detailed changes and mechanisms.

引用

页码：132 / 139

页数：8

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