Experimental Study on the Mechanical Properties and Disintegration Resistance of Microbially Solidified Granite Residual Soil
Microbially induced calcium carbonate (CaCO<sub>3</sub>) precipitation (MICP) is an emerging soil-treatment method. To explore the effect of this technology on granite residual soil, this study investigated the effects of the mechanical properties and disintegration resistance of microbi...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-01-01
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| Series: | Crystals |
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| Online Access: | https://www.mdpi.com/2073-4352/12/2/132 |
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| author | Shihua Liang Xueli Xiao Caixing Fang Deluan Feng Yuxin Wang |
| author_facet | Shihua Liang Xueli Xiao Caixing Fang Deluan Feng Yuxin Wang |
| author_sort | Shihua Liang |
| collection | DOAJ |
| description | Microbially induced calcium carbonate (CaCO<sub>3</sub>) precipitation (MICP) is an emerging soil-treatment method. To explore the effect of this technology on granite residual soil, this study investigated the effects of the mechanical properties and disintegration resistance of microbially cured granite residual soil under different moisture contents by conducting direct shear and disintegration tests. The curing mechanism was also discussed and analyzed. Results showed that MICP can be used as reinforcement for granite residual soil. Compared with those of untreated granite residual soil, the internal friction angle of MICP-treated granite residual soil increased by 10% under a moisture content of 30%, while its cohesion increased by 218%. The disintegration rate of the MICP-treated granite residual soil stabilized after a maintenance time of 5 days under different water contents. Therefore, we provide the explanation that the improvement of the shear strength and disintegration resistance of granite residual soil is due to CaCO<sub>3</sub> precipitation and the surface coating. |
| first_indexed | 2024-03-09T22:16:21Z |
| format | Article |
| id | doaj.art-7cc209cbbabb429ca221cd8314e16434 |
| institution | Directory Open Access Journal |
| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-03-09T22:16:21Z |
| publishDate | 2022-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Crystals |
| spelling | doaj.art-7cc209cbbabb429ca221cd8314e164342023-11-23T19:23:25ZengMDPI AGCrystals2073-43522022-01-0112213210.3390/cryst12020132Experimental Study on the Mechanical Properties and Disintegration Resistance of Microbially Solidified Granite Residual SoilShihua Liang0Xueli Xiao1Caixing Fang2Deluan Feng3Yuxin Wang4School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, ChinaSchool of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, ChinaShenzhen Railway Investment Construction Group Co., Ltd., Shenzhen 518000, ChinaSchool of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, ChinaSchool of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, ChinaMicrobially induced calcium carbonate (CaCO<sub>3</sub>) precipitation (MICP) is an emerging soil-treatment method. To explore the effect of this technology on granite residual soil, this study investigated the effects of the mechanical properties and disintegration resistance of microbially cured granite residual soil under different moisture contents by conducting direct shear and disintegration tests. The curing mechanism was also discussed and analyzed. Results showed that MICP can be used as reinforcement for granite residual soil. Compared with those of untreated granite residual soil, the internal friction angle of MICP-treated granite residual soil increased by 10% under a moisture content of 30%, while its cohesion increased by 218%. The disintegration rate of the MICP-treated granite residual soil stabilized after a maintenance time of 5 days under different water contents. Therefore, we provide the explanation that the improvement of the shear strength and disintegration resistance of granite residual soil is due to CaCO<sub>3</sub> precipitation and the surface coating.https://www.mdpi.com/2073-4352/12/2/132microbially induced calcium carbonate precipitationgranite residual soilmoisture contentshear strengthdisintegration test |
| spellingShingle | Shihua Liang Xueli Xiao Caixing Fang Deluan Feng Yuxin Wang Experimental Study on the Mechanical Properties and Disintegration Resistance of Microbially Solidified Granite Residual Soil Crystals microbially induced calcium carbonate precipitation granite residual soil moisture content shear strength disintegration test |
| title | Experimental Study on the Mechanical Properties and Disintegration Resistance of Microbially Solidified Granite Residual Soil |
| title_full | Experimental Study on the Mechanical Properties and Disintegration Resistance of Microbially Solidified Granite Residual Soil |
| title_fullStr | Experimental Study on the Mechanical Properties and Disintegration Resistance of Microbially Solidified Granite Residual Soil |
| title_full_unstemmed | Experimental Study on the Mechanical Properties and Disintegration Resistance of Microbially Solidified Granite Residual Soil |
| title_short | Experimental Study on the Mechanical Properties and Disintegration Resistance of Microbially Solidified Granite Residual Soil |
| title_sort | experimental study on the mechanical properties and disintegration resistance of microbially solidified granite residual soil |
| topic | microbially induced calcium carbonate precipitation granite residual soil moisture content shear strength disintegration test |
| url | https://www.mdpi.com/2073-4352/12/2/132 |
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