广东工业大学学报 ›› 2017, Vol. 34 ›› Issue (05): 80-85.doi: 10.12052/gdutxb.160107

• 综合研究 • 上一篇    下一篇

石灰与水泥固化南沙锌污染软土试验研究

梁仕华1, 罗祺1, 王蒙2, 刘勇健1, 尹应梅1, 江志源1   

  1. 1. 广东工业大学 土木与交通工程学院, 广东 广州 510006;
    2. 交通运输部 南海第一救助飞行队, 广东 珠海 519000
  • 收稿日期:2016-08-20 出版日期:2017-09-09 发布日期:2017-07-10
  • 作者简介:梁仕华(1976-),男,副教授,博士,主要研究方向为环境岩土工程及地下空间工程.
  • 基金资助:
    国家自然科学基金资助项目（51508109）；广东省自然科学基金资助项目（2016A030313692）

An Experimental Study of Nansha Zinc Contaminated Sludge Solidification with Cement and Lime

Liang Shi-hua1, Luo Qi1, Wang Meng2, Liu Yong-jian1, Yin Ying-mei1, Jiang Zhi-yuan1   

  1. 1. School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, China;
    2. The South China Sea No.1 Flying Rescue Team, The Ministry of Transport, Zhuhai 519000, China
  • Received:2016-08-20 Online:2017-09-09 Published:2017-07-10

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摘要： 利用石灰与水泥混合固化剂对广州南沙锌污染淤泥进行固化/稳定处理.通过无侧限抗压强度试验和淋滤试验分别对固化土体的力学性能和锌离子浸出率进行研究，得出无侧限抗压强度随固化剂中石灰掺量和龄期的变化关系及石灰掺量与锌离子浸出量之间的变化关系；通过扫描电镜研究了不同配比下固化土样微观结构特征.研究表明：随着石灰掺量的增加，固化土体强度随龄期和石灰掺量均有较大提高，同时锌离子浸出质量浓度有大幅度降低；其中15%水泥+10%石灰修复3 000 mg/kg以下锌污染土锌离子浸出率为零.综合来说，H2（15%水泥+10%石灰）固化修复效果较好，这与固化土体的微观结构中的水化产物有关.

关键词: 南沙软土, 锌离子, 无侧限抗压强度, 淋滤试验, 扫描电镜

Abstract: Zinc pollution sludge in Nansha (Guangzhou) was solidified and stabilized by the lime and cement. The mechanical property of solidified soil and zinc ions leaching rate were studied respectively through the unconfined compressive strength test and leaching test. The relationship of the unconfined compressive strength with the changes of lime dosage and the age has been obtained, meanwhile the relationship of the lime dosage and zinc ions leaching quantity also derived. The solidified soil samples with different ratio of composition are observed that they have different microstructure characteristics by the electronic microscope. Research shows that the strength of solidified soil has significant increase with the increasing of age and the amount of lime, and the zinc ions leaching concentration has greatly reduced. What's more, zinc ions leaching rate in the zinc pollution soil was to zero with the 15% cement+10% lime repair below 3 000 mg/kg. In conclusion, H2 (15% cement+10% lime) has better effect in curing and repairing, which is associated with the microstructure of hydration products of solidified soil.

Key words: Nansha soft soil, zinc ions, the unconfined compressive strength (UCS), leaching test, scanning electronic microscope (SEM)

中图分类号: 

  • X53
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