Improving soil surface resistance and stability using EICP process

Articles in Press

Document Type : Research Article

Authors

1 Department of Civil Engineering, K.N. Toosi University of Technology, Valiasr St., Mirdamad Cr., Tehran, Iran

2 Department of Plant Biology, Faculty of Biological Science, Tarbiat Modares University (TMU), Tehran, Iran

Abstract

In recent years, soil surface erosion, especially by wind, has increased the area of deserts and increased problems for the ecosystem. Soil surface resilience using biological methods is one of the new methods to counter with soil erosion. In this study, crude extract of soybean shoots has been used as a rich source of urease enzyme in the process of enzyme induced calcium carbonate precipitation (EICP). In this process, urea is hydrolyzed by urease enzyme and then the produced carbonate is combined with calcium in the EICP solution to produce calcium carbonate which acts as a binder for soil particles. The plant extract is a suitable substitute for pure urease enzyme or enzyme obtained by bacteria, which is costly to prepare. Three types of soils have been sprayed with EICP solution for biocementation using the EICP process and soil strength measurement test has been performed on the soil using a penetrometer. The thickness of the flakes formed by the spraying of the solution has been measured. The results show that the method used increases the soil surface resistance and is a suitable method to prevent soil erosion.

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Amirkabir Journal of Civil Engineering

Articles in Press, Accepted Manuscript
Available Online from 06 September 2025

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