Different binding materials, such as cement and lime, used to stabilize soil pose a threat to the environment. This study uses cow dung (CD) as a binding material. This is an alternative to the concurrent practices to reduce the risk of environmental degradation. CD utilizes the concept of binding soil particles using biocementation techniques. This method bonds the soil particles through biologically precipitated cementing agents using extracellular polysaccharide (EPS) and microbially induced calcite precipitate (MICP). This study aims to investigate the strength characteristics of soil after reinforcing the soil with 10% CD by weight. Ground improvement techniques use the premixing of CD and chemicals (magnesium oxide and calcium nitrate). Unconfined compressive strength (UCS) conducted on biocemented soil specimen increases soil strength up to four times after seven days. SEM images further confirmed that calcium carbonate precipitates were observed to bind soil particles. Biocementation techniques have the potential to be used as a ground improvement method on a large scale considering positive environmental impact for long-term sustainability.

错误:搜索内容不能为空,请输入英文关键词
错误:关键词超出字数限制,请精简
高级检索

Strength Analysis of Biocemented Soil Using Cow Dung

  • Tanuj Kumar,
  • Ashutosh Trivedi,
  • Vijay Kumar Minocha

摘要

Different binding materials, such as cement and lime, used to stabilize soil pose a threat to the environment. This study uses cow dung (CD) as a binding material. This is an alternative to the concurrent practices to reduce the risk of environmental degradation. CD utilizes the concept of binding soil particles using biocementation techniques. This method bonds the soil particles through biologically precipitated cementing agents using extracellular polysaccharide (EPS) and microbially induced calcite precipitate (MICP). This study aims to investigate the strength characteristics of soil after reinforcing the soil with 10% CD by weight. Ground improvement techniques use the premixing of CD and chemicals (magnesium oxide and calcium nitrate). Unconfined compressive strength (UCS) conducted on biocemented soil specimen increases soil strength up to four times after seven days. SEM images further confirmed that calcium carbonate precipitates were observed to bind soil particles. Biocementation techniques have the potential to be used as a ground improvement method on a large scale considering positive environmental impact for long-term sustainability.