Experimental Study to Determine an EICP Application Method Feasible for Field Treatment for Soil Erosion Control
Experimental Study to Determine an EICP Application Method Feasible for Field Treatment for Soil Erosion Control
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DOI：
10.1061/9780784482834.023
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发表时间：
2020-02
期刊：
影响因子：
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通讯作者：
R. Ossai;Lucas Rivera;P. Bandini
中科院分区：
文献类型：
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作者：
R. Ossai;Lucas Rivera;P. Bandini
本研究的最终目标是评估使用酶诱导碳酸盐沉淀 (EICP) 形成胶结顶层以控制倾斜沙土径流侵蚀的可行性。本文介绍了对 EICP 处理的砂子进行小规模测试的实验研究结果，以确定适合该应用现场放置的处理方法。测试的土壤是两种天然沙子和用作对照的渥太华 20-30 沙子。 EICP的应用方法有重力渗滤、一步混合压实和两步混合压实。其他考虑的条件包括处理前预冲洗沙子、处理前调整土壤 pH 值以及改变 EICP 溶液浓度。当土壤在压实之前首先与脲酶溶液混合时，使用两步混合压实获得了该现场应用的有希望的结果。考虑到EICP反应在所有组分添加完毕后就开始，该方法将确保在处理土壤的保护层安装之前反应不会发生。在整个试验条件下，预冲洗天然砂的效果并不一致，其对改善天然砂的土壤胶结作用的作用有待进一步研究。
The end goal of this research is assessing the feasibility of using enzyme induced carbonate precipitation (EICP) to create a cemented top layer to control runoff erosion in sloping sandy soil. The paper presents the results of an experimental study of bench-scale tests on EICP-treated sands to determine a treatment method feasible for field placement for this application. The soils tested were two natural sands and Ottawa 20–30 sand used as control. The EICP application methods were percolation by gravity, one-step mix-compact, and two-step mix-compact. Other conditions considered were pre-rinsing the sand prior to treatment, adjusting soil pH prior to treatment, and changing the EICP solution concentration. Promising results for this field application were obtained using the two-step mix-compact when the soil was first mixed with the urease enzyme solution before compaction. Considering that the EICP reaction starts once all components are added, this method would ensure that the reaction does not take place before the protective layer of treated soil has been installed. The effect of pre-rinsing the natural sand was not consistent throughout the testing conditions and its role in improving soil cementation in natural sand needs further study.