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Application of bioenzymatic soil stabilization in comparison to macadam in the construction of transport
Abstract:
uver ninety percent or roaas anc nignways are pavea witn aspnait as it is less expensive, iexime and easy to construct and repair in comparison to concrete. The increasing effect of climatic change and cost of construction materials have forced to consider environment friendly methods to build roads. One economically feasible solution for achieving these objectives is use of enzyme soil stabilization. Use of bioenzymes is known to improve the stability of aggregates and soil materials in the roadways and other pavement structures. The present study was designed to introduce environment friendly TerraZyme to increase engineering qualities of soil for road construction. Soil classification and earth work characteristics were analyzed for two soil types representing pulverized local and transported soil with and without TerraZyme. Obtained results confirmed that treatment with TerraZyme increased engineering characteristics as indicated by increase in CBR values from 10.47 to 16.28 with 55 % improvement, increase of 4.28 % and 2.20 % in dry density and decrease of 18.13 % and 6.17 % in moisture content for untreated and treated soils, respectively. TerraZyme constructed roads will be effective for cost saving upto 15-20 % and maintenance cost reduction of60 % as compared to normal water bound Macadam road.
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