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Journal of Environmental Biology

pISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP

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    Abstract - Issue Sep 2016, 37 (5)                                     Back

nstantaneous and historical temperature effects on a-pinene

Application of bioenzymatic soil stabilization in comparison to macadam in the construction of transport infrastructure


Uzaira Rafique1*, Saima Nasreen2, Rabbiya Naveed1 and Muhammad Aqeel Ashraf3,4*

1Department of Environmental Sciences, Fatima Jinnah Women University, The Mall Rawalpindi, 46000, Pakistan

2Department of Environmental Sciences, International Islamic University, Islamabad, 44000, Pakistan

3Faculty of Science & Natural Resources, University Malaysia Sabah 88400 Kota Kinabalu, Sabah, Malaysia

4Department of Environmental Science and Engineering, School of Environmental Studies, China University of Geosciences, 430074 Wuhan, P.R. China

*Corresponding Author E-mail:


Publication Data

Paper received:

01 October 2015


Revised received:

27 April 2016


Re-revised received:

5 May 2016



23 June 2016



Over ninety percent of roads and highways are paved with asphalt as it is less expensive, flexible 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 of 60 % as compared to normal water bound Macadam road.   



 Key words

Environment friendly, Macadam, Soil stabilization, Terra Zyme, Transport infrastructure



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