A Simplified Model for Shear Behavior of Mortar Using Biomimetic Carbonate Precipitation
As a common molecule in biomineralization, L-aspartic acid (L-Asp) has been proven to be able to induce in vitro CaCO<sub>3</sub> precipitation, but its application in sand reinforcement has never been studied. In this study, L-Asp was employed in sand reinforcement for the first time th...
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MDPI AG
2023-08-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/16/16/5613 |
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| author | Yu Diao Jitao Bai Changyou Sun Jianyou Huang Chao Yang Qingsong Hu |
| author_facet | Yu Diao Jitao Bai Changyou Sun Jianyou Huang Chao Yang Qingsong Hu |
| author_sort | Yu Diao |
| collection | DOAJ |
| description | As a common molecule in biomineralization, L-aspartic acid (L-Asp) has been proven to be able to induce in vitro CaCO<sub>3</sub> precipitation, but its application in sand reinforcement has never been studied. In this study, L-Asp was employed in sand reinforcement for the first time through the newly developed biomimetic carbonate precipitation (BCP) technique. Specimens with different number of BCP spray cycles were prepared, and a series of direct shear tests were conducted to investigate the impact of spray number on shear strength, critical displacement, and residual strength. Then a simplified power model for shear stress–displacement behavior was established and calibrated with the measured data. The results show that BCP can significantly improve the shear strength of sand. As the number of spray cycles increases, both the shear strength and residual strength increase, while the critical displacement decreases. Such variations can be described with two sigmoid models and a linear model, respectively. The simplified power model performs well in most cases, especially at higher spray numbers. This study is expected to provide a practical model for the shear behavior of BCP-treated mortar. |
| first_indexed | 2024-03-10T23:46:17Z |
| format | Article |
| id | doaj.art-27c89de2d5be4d0a977110cddb7804c9 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T23:46:17Z |
| publishDate | 2023-08-01 |
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| series | Materials |
| spelling | doaj.art-27c89de2d5be4d0a977110cddb7804c92023-11-19T02:00:09ZengMDPI AGMaterials1996-19442023-08-011616561310.3390/ma16165613A Simplified Model for Shear Behavior of Mortar Using Biomimetic Carbonate PrecipitationYu Diao0Jitao Bai1Changyou Sun2Jianyou Huang3Chao Yang4Qingsong Hu5School of Civil Engineering, Tianjin University, Tianjin 300072, ChinaSchool of Civil Engineering, Tianjin University, Tianjin 300072, China3rd Construction Co., Ltd. of China Construction 5th Engineering Bureau, Changsha 410021, ChinaSchool of Civil Engineering, Tianjin University, Tianjin 300072, ChinaChina State Construction Engineering Corporation, Beijing 100029, ChinaSchool of Civil Engineering, Tianjin University, Tianjin 300072, ChinaAs a common molecule in biomineralization, L-aspartic acid (L-Asp) has been proven to be able to induce in vitro CaCO<sub>3</sub> precipitation, but its application in sand reinforcement has never been studied. In this study, L-Asp was employed in sand reinforcement for the first time through the newly developed biomimetic carbonate precipitation (BCP) technique. Specimens with different number of BCP spray cycles were prepared, and a series of direct shear tests were conducted to investigate the impact of spray number on shear strength, critical displacement, and residual strength. Then a simplified power model for shear stress–displacement behavior was established and calibrated with the measured data. The results show that BCP can significantly improve the shear strength of sand. As the number of spray cycles increases, both the shear strength and residual strength increase, while the critical displacement decreases. Such variations can be described with two sigmoid models and a linear model, respectively. The simplified power model performs well in most cases, especially at higher spray numbers. This study is expected to provide a practical model for the shear behavior of BCP-treated mortar.https://www.mdpi.com/1996-1944/16/16/5613sand reinforcementL-aspartic acidbiomimetic carbonate precipitation (BCP)direct shear testsimplified model |
| spellingShingle | Yu Diao Jitao Bai Changyou Sun Jianyou Huang Chao Yang Qingsong Hu A Simplified Model for Shear Behavior of Mortar Using Biomimetic Carbonate Precipitation Materials sand reinforcement L-aspartic acid biomimetic carbonate precipitation (BCP) direct shear test simplified model |
| title | A Simplified Model for Shear Behavior of Mortar Using Biomimetic Carbonate Precipitation |
| title_full | A Simplified Model for Shear Behavior of Mortar Using Biomimetic Carbonate Precipitation |
| title_fullStr | A Simplified Model for Shear Behavior of Mortar Using Biomimetic Carbonate Precipitation |
| title_full_unstemmed | A Simplified Model for Shear Behavior of Mortar Using Biomimetic Carbonate Precipitation |
| title_short | A Simplified Model for Shear Behavior of Mortar Using Biomimetic Carbonate Precipitation |
| title_sort | simplified model for shear behavior of mortar using biomimetic carbonate precipitation |
| topic | sand reinforcement L-aspartic acid biomimetic carbonate precipitation (BCP) direct shear test simplified model |
| url | https://www.mdpi.com/1996-1944/16/16/5613 |
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