Abstract
In the recent studies many chemical have been emerged and used as stabilizing agent. One of such chemical (Bio-enzyme) was used in this study as a stabilizing agent. Bio-enzyme is prepared locally from fermented vegetable and fruits waste. These products are natural, nontoxic, non-corrosive, nonflammable liquid and environmentally harmless. In this research, Bio-enzyme was prepared and used in varying proportion to stabilize laterite samples collected from different locations. Detailed laboratory experiments (Classification tests and CBR) were conducted to evaluate the effects of Bio-enzyme at varying dosage after 24 hours of curing of specimens. The percentage passing through sieve No. 200(75 micron) was less than 35%., according to ASHTO and clause 6201 of Federal Ministry of Works and Housing (F.M.W & H) Specification Requirements, sample A is (A-2-5), sample B is (A-2-4) while sample C is classified as A-2-6 and they are silty or clayed gravel and sand. Sample A is a good subgrade, subbase or base materials based on highest CBR values (at 20% bio-enzyme dosage, Sample A (102.50%) and sample B (69.40%) & at 10% sample C (33.2%). Sample B can also be used as subgrade or subbase materials where light traffic is considered and sample C is suitable as filling materials as evident in their CBR value. It has been observed that Bio-enzyme treated soil shows significant improvement in terms of the dry density and CBR value. Presence of Bio-enzyme in the soil samples led to increase in the C.B.R by 10-20% as compared to the control). However, it is recommended that assumption should not be made that Bio-enzyme is considered suitable for all type of soil and long term effect of it should also be examined.
Highlights
In the present study, a type of bio-enzyme was used for stabilization of lateritic soil with varying bio-enzyme dosage
After comprehensive investigation into the impact, influence and suitability of Bio-enzyme on the geotechnical properties of soil samples from various location, The Bioenzyme at various concentration were introduced to the samples and the geotechnical and chemical properties were determined over a period of 24 hours
1) Presence of Bio-enzyme in the soil samples react in relation with the nature, characteristic and type of sample
Summary
A type of bio-enzyme was used for stabilization of lateritic soil with varying bio-enzyme dosage. Bio-Enzyme are natural, nontoxic, non-corrosive, nonflammable liquid enzyme formulation, fermented from vegetables and fruit extract that improves the engineering properties of soil which can be mixed with water at the optimum moisture content. It is perfectly soluble in water, brown in color and smell like molasses. The chemical bonding (Bio cementation) of the soil particles is increased by the use of enzyme, and a permanent structure is formed which is resistant to wear and tear, weathering and Published on May 30, 2020. Bio-mediated method of soil improvement has been considered as an inventive and new approach in geotechnical engineering that can be utilized to prevent liquefaction and landslide in loose sand which usually results in foundation deformation and/or failure
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