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: uzairaiqbal@yahoo.com
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Publication
Data
Paper received:
01 October 2015
Revised received:
27 April 2016
Re-revised received:
5 May 2016
Accepted:
23 June 2016
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Abstract
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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