Testing using a dynamic shear rheometer (DSR) and rheological analysis were conducted to analyse the detachment behaviour of bio-cemented soil at a microstructural level. Preventing detachment of soil particles from the ground surface is the key to mitigating the generation of fugitive dust due to wind-blown soil, a significant environmental problem in arid and semi-arid regions. Bio-cementation by way of enzyme-induced carbonate precipitation (EICP) has shown potential for mitigating soil particle detachment and the associated fugitive dust emissions. A strong correlation between particle detachment rate measured in wind tunnel tests and amplitude sweep test results using the DSR demonstrates the ability of the device to capture the detachment potential of soil bio-cemented using EICP. In addition to facilitating optimisation of bio-cementation for dust control, the rheometer tests also give an insight into the efficacy of rheometry for assessing soil microstructure strength for other geotechnical applications.

中文翻译：

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生物胶结砂壳微观结构强度的流变学评价

使用动态剪切流变仪 (DSR) 进行测试和流变分析，以在微观结构水平上分析生物胶结土壤的分离行为。防止土壤颗粒从地表脱离是减少风吹土壤产生扬尘的关键，这是干旱和半干旱地区的一个重大环境问题。通过酶诱导碳酸盐沉淀 (EICP) 进行的生物胶结已显示出减轻土壤颗粒脱离和相关扬尘排放的潜力。在风洞测试中测量的颗粒脱离率与使用 DSR 的振幅扫描测试结果之间的强相关性证明了该设备能够捕获使用 EICP 进行生物胶结的土壤的脱离潜力。