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Improvement in the unconfined compressive strength of sand test pieces cemented with calcium phosphate compound by addition of calcium carbonate
| Title: | Improvement in the unconfined compressive strength of sand test pieces cemented with calcium phosphate compound by addition of calcium carbonate |
| Authors: | Akiyama, Masaru Browse this author | | Kawasaki, Satoru Browse this author →KAKEN DB |
| Keywords: | Biogrout | | Calcium carbonate | | Calcium phosphate compound | | Ground improvement | | Seed crystal | | Unconfined compressive strength |
| Issue Date: | Oct-2012 |
| Publisher: | Elsevier B.V. |
| Journal Title: | Ecological Engineering |
| Volume: | 47 |
| Start Page: | 264 |
| End Page: | 267 |
| Publisher DOI: | 10.1016/j.ecoleng.2012.07.008 |
| Abstract: | We added calcium carbonate (CC) powder to a novel grout made from calcium phosphate compound (CPC-chem) to increase the ground strength improvement afforded by CPC-chem. We conducted the unconfined compressive strength (UCS) test and scanning electron microscopy (SEM) observation on test pieces cemented with CPC-chem and CC powder. The UCS of test pieces cemented with CPC-chem and CC powder was significantly higher than that of test pieces cemented without CC powder, and it reached a maximum of 209.7 kPa. The UCS of test pieces cemented with CC powder and deionized water was 12.5 kPa, which was similar to that of test pieces cemented with deionized water only (10 kPa). SEM observation revealed mesh-like and three-dimensional structures in the segment of the test piece cemented with CPC-chem and 1 wt% of CC, which showed UCS of over 200 kPa and the minimum axial strain rate among all cases in this study. These results suggest that the addition of CC powder significantly enhances the ground improvement afforded by CPC-chem. |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/50409 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 川﨑 了
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