期刊
CONSTRUCTION AND BUILDING MATERIALS
卷 133, 期 -, 页码 73-80出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2016.12.058
关键词
Bio-cement; Stabilization; Sand practices; Paenibacillus; Microstructure
资金
- National Nature Science Foundation of China [51372038]
- Key Research and Development Program of Jiangsu Science and Technology Department [BE2015678]
- Science and Technology Research Program of Jiangsu Transport Department [2015T32]
- Scientific Research Foundation of Graduate School of Southeast University [YBJJ1566]
Bio-cement was used to stabilize sand particles, and the process of cementation of sand particles was verified. Meanwhile, the mechanical properties of sand practices stabilized by bio-cement for different number of spraying were tested. The results show that the hardness and Compressive strength of samples increased with number of spraying: the average hardness and compressive strength of samples could be up to 31.5 Gpa and 0.67 MPa after spraying seven times, respectively. With the increase of number of spraying, the average calcite content of samples increased from 7.08% (one time) to 14.36% (seven times). In addition, the wind erosion resistance and microstructure of samples with different number of spraying were analyzed. The results indicated that the wind erosion resistance and microstructure of samples became increasingly excellent and dense with the increase of number of spraying. Moreover, porosity character of samples was also tested. With the increase of number of spraying, the average porosity of samples reduced from 18.3% (one time) to 13.3% (seven times), while section porosity character of samples increased gradually with the depth. (C) 2016 Elsevier Ltd. All rights reserved.
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