Thermal Conductivity of Dry Sands Treated with Microbial-Induced Calcium Carbonate Precipitation
With an increasing energy demand, exploration and utilization of new energy resources become more significant recently. Geothermal energy, characterized as a clean, renewable, and sustainable energy, has various engineering applications. Microbial-induced calcium carbonate precipitation (MICP) techn...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2019/4562958 |
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| author | Zhaoyu Wang Nan Zhang Fei Lin Jinhua Ding Huimin Yang |
| author_facet | Zhaoyu Wang Nan Zhang Fei Lin Jinhua Ding Huimin Yang |
| author_sort | Zhaoyu Wang |
| collection | DOAJ |
| description | With an increasing energy demand, exploration and utilization of new energy resources become more significant recently. Geothermal energy, characterized as a clean, renewable, and sustainable energy, has various engineering applications. Microbial-induced calcium carbonate precipitation (MICP) technique has a potential to improve soil thermal properties for geothermal applications. In this study, thermal conductivity of dry sands treated using MICP technique with different treatment cycles was investigated in laboratory. The results showed that thermal conductivity of MICP-treated sands was much higher than that of the untreated sand under dry condition and it increased with increasing treatment cycles. Based on the scanning electron microscopy (SEM) analyses, it is found MICP-induced CaCO3 crystals are being formed among sand particles functioned as “thermal bridge,” which provided more highly effective heat transfer path. It is concluded that the MICP technique could significantly improve the thermal conductivity of sands and the overall heat transfer efficiency. It is advantageous to use MICP-treated soils as enhanced grout materials for underground energy geostructures. |
| format | Article |
| id | doaj-art-5a76e79142764b748efdc2e5673339da |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-5a76e79142764b748efdc2e5673339da2025-02-03T01:31:28ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422019-01-01201910.1155/2019/45629584562958Thermal Conductivity of Dry Sands Treated with Microbial-Induced Calcium Carbonate PrecipitationZhaoyu Wang0Nan Zhang1Fei Lin2Jinhua Ding3Huimin Yang4College of Civil Engineering, Yancheng Institute of Technology, Yancheng, Jiangsu 224051, ChinaDepartment of Civil Engineering, The University of Texas at Arlington, Arlington, Texas 76019, USACollege of Civil Engineering, Yancheng Institute of Technology, Yancheng, Jiangsu 224051, ChinaCollege of Civil Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212003, ChinaCollege of Civil Engineering, Yancheng Institute of Technology, Yancheng, Jiangsu 224051, ChinaWith an increasing energy demand, exploration and utilization of new energy resources become more significant recently. Geothermal energy, characterized as a clean, renewable, and sustainable energy, has various engineering applications. Microbial-induced calcium carbonate precipitation (MICP) technique has a potential to improve soil thermal properties for geothermal applications. In this study, thermal conductivity of dry sands treated using MICP technique with different treatment cycles was investigated in laboratory. The results showed that thermal conductivity of MICP-treated sands was much higher than that of the untreated sand under dry condition and it increased with increasing treatment cycles. Based on the scanning electron microscopy (SEM) analyses, it is found MICP-induced CaCO3 crystals are being formed among sand particles functioned as “thermal bridge,” which provided more highly effective heat transfer path. It is concluded that the MICP technique could significantly improve the thermal conductivity of sands and the overall heat transfer efficiency. It is advantageous to use MICP-treated soils as enhanced grout materials for underground energy geostructures.http://dx.doi.org/10.1155/2019/4562958 |
| spellingShingle | Zhaoyu Wang Nan Zhang Fei Lin Jinhua Ding Huimin Yang Thermal Conductivity of Dry Sands Treated with Microbial-Induced Calcium Carbonate Precipitation Advances in Materials Science and Engineering |
| title | Thermal Conductivity of Dry Sands Treated with Microbial-Induced Calcium Carbonate Precipitation |
| title_full | Thermal Conductivity of Dry Sands Treated with Microbial-Induced Calcium Carbonate Precipitation |
| title_fullStr | Thermal Conductivity of Dry Sands Treated with Microbial-Induced Calcium Carbonate Precipitation |
| title_full_unstemmed | Thermal Conductivity of Dry Sands Treated with Microbial-Induced Calcium Carbonate Precipitation |
| title_short | Thermal Conductivity of Dry Sands Treated with Microbial-Induced Calcium Carbonate Precipitation |
| title_sort | thermal conductivity of dry sands treated with microbial induced calcium carbonate precipitation |
| url | http://dx.doi.org/10.1155/2019/4562958 |
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