生蚝壳作为微生物固化砂土钙源的试验研究

梁仕华; 林坚鹏; 牛九格; 冯德銮; 龚星; 罗庆姿

doi:10.12052/gdutxb.190078

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生蚝壳作为微生物固化砂土钙源的试验研究

综合研究 | 更新时间：2026-05-27

- 生蚝壳作为微生物固化砂土钙源的试验研究
- An Experimental Study of Oyster Shell as Calcium Source for Microbial Solidification
- 广东工业大学学报 2020年37卷第1期页码：48-52
- 作者机构：
  
  1. 广东工业大学土木与交通工程学院,广东,广州,510006
  2. 桂林联勤保障中心 76174部队,广西,桂林,512200
- 作者简介：
  
  梁仕华(1977–)，男，副教授，主要研究方向为环境岩土和微生物岩土，E-mail：shihua_l@126.com
  林坚鹏(1992–)，男，硕士研究生，主要研究方向为微生物岩土，E-mail：837089849@qq.com
- 基金信息：
  
  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(2017A030310244)
- DOI：10.12052/gdutxb.190078
  中图分类号： TU441
- 网络首发：2020-01-25，
  
  纸质出版：2020
- 稿件说明：
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梁仕华, 林坚鹏, 牛九格, 冯德銮, 龚星, 罗庆姿. 生蚝壳作为微生物固化砂土钙源的试验研究[J]. 广东工业大学学报, 2020, 37(1): 48-52.

Liang Shi-hua, Lin Jian-peng, Niu Jiu-ge, et al. An Experimental Study of Oyster Shell as Calcium Source for Microbial Solidification[J]. 2020, 37(1): 48-52.
梁仕华, 林坚鹏, 牛九格, 冯德銮, 龚星, 罗庆姿. 生蚝壳作为微生物固化砂土钙源的试验研究[J]. 广东工业大学学报, 2020, 37(1): 48-52. DOI： 10.12052/gdutxb.190078.

Liang Shi-hua, Lin Jian-peng, Niu Jiu-ge, et al. An Experimental Study of Oyster Shell as Calcium Source for Microbial Solidification[J]. 2020, 37(1): 48-52. DOI： 10.12052/gdutxb.190078.

摘要

微生物诱导碳酸钙沉淀(microbial induced calcium carbonate precipitation

MICP)是一种新兴的环保地基加固技术

使用该技术需消耗大量化学分析级试剂

如尿素、钙盐等

对环境等造成一定的不良影响。基于利用废弃资源的理念

选取厨余垃圾生蚝壳作为MICP固化砂土钙源

并与用硝酸钙、氯化钙作为钙源进行对比。通过无侧限抗压强度试验、渗透试验、碳酸钙质量分数测试、干密度试验和扫描电镜试验(SEM)等探讨该方法的可行性。试验结果表明

以生蚝壳为钙源的MICP固化砂柱的平均孔径最大

但其表观孔隙率最低

无侧限抗压强度、渗透系数、碳酸钙质量分数、干密度等物理力学指标均优于化学钙。SEM试验结果显示

不同钙源固化砂柱砂颗粒表面均有碳酸钙沉淀生成

生蚝壳钙源获得的碳酸钙沉淀晶体形态是表面比较粗糙

伴有微小孔隙的球体形态; 硝酸钙获得的碳酸钙沉淀是介于球状和棱柱体之间的多棱角的簇状; 氯化钙获得的碳酸钙沉淀呈现颗粒相互交错堆积的簇状。

Abstract

Microbial-induced calcium carbonate precipitation (MICP) is an emerging environmentally friendly foundation reinforcement technology that requires the consumption of a large number of chemical analysis-grade reagents

such as urea

calcium salts

etc.

which have certain adverse effects on the environment. Based on the idea of utilizing waste resources

oyster shells from kitchen waste were selected as calcium sources of MICP solidified sandy soil and compared with chemical calcium sources such as calcium nitrate and calcium chloride. Through unconfined compressive strength test

permeability test

calcium carbonate content test

dry density test and scanning electron microscopy (SEM)

the feasibility of oyster shells as calcium source of MICP solidified sand was discussed. The experimental results show that the MICP solidified sand column with raw clam shells as the calcium source has the largest average pore size

but the lowest apparent porosity

and the physical strength indexes such as unconfined compressive strength

permeability coefficient

calcium carbonate content and dry density are all higher than chemical calcium. SEM test results show that different calcium source solidified sand column sand particles have calcium carbonate precipitation on the surface

and the calcium carbonate precipitated crystal obtained from the raw clam shell calcium source has a relatively fine surface with a small pore shape; and nitric acid obtained from calcium carbonate precipitate is in a cluster of polygonal angles between the spherical and prismatic bodies; and calcium chloride obtained from calcium carbonate precipitate exhibits clusters in which the particles are interlaced with each other.

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references

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