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Abstract
Pollution is a very predominant problem in Nigeria. As a developing nation, we face
challenges of constant economic recession and this can have effect on so many facets of life
including construction. Road construction is now so expensive. In other to combat pollution
and bad roads, waste can be used with other construction materials to construct better
roads.
In this study, the geotechnical properties of natural soil were determined, the effect of
mixture of orange peels in proportions of 2%, 4%, 6% and 8% were observed and the
appropriate mix ratio was ascertained. The soil samples were obtained from Faculty of
Engineering, University of Benin, Benin City, Edo State, from two locations. The following
tests were carried out; Moisture content Test, Specific Gravity Test, Sieve analysis, Atterberg
Limit tests, Compaction tests, California Bearing Ratio tests and on the treated and
untreated laterite soil. This laboratory tests were carried out to determine the suitability of
these waste materials when mixed with the soil samples. For the control sample, the specific gravity was obtained to be 2.69 and 2.73 which is above
2.50 but not greater than 3.0 for lateritic soils, this shows a high plasticity. The plasticity
index was obtained as 39.49% which indicates that the soil is not medium in plasticity. Also, from the sieve analysis, the soil is classified as an A-2-6 soil according to AASTHO. This value
indicates that it is good for subgrade material. Therefore, these soil reinforcement
techniques with orange peel can only be used for Trunk D roads or as subgrade materials
which require a minimum soaked CBR of 5%. For Trunk A, B and C roads, the mixture would
require a binder like cement before being considered as subbase and base course materials
challenges of constant economic recession and this can have effect on so many facets of life
including construction. Road construction is now so expensive. In other to combat pollution
and bad roads, waste can be used with other construction materials to construct better
roads.
In this study, the geotechnical properties of natural soil were determined, the effect of
mixture of orange peels in proportions of 2%, 4%, 6% and 8% were observed and the
appropriate mix ratio was ascertained. The soil samples were obtained from Faculty of
Engineering, University of Benin, Benin City, Edo State, from two locations. The following
tests were carried out; Moisture content Test, Specific Gravity Test, Sieve analysis, Atterberg
Limit tests, Compaction tests, California Bearing Ratio tests and on the treated and
untreated laterite soil. This laboratory tests were carried out to determine the suitability of
these waste materials when mixed with the soil samples. For the control sample, the specific gravity was obtained to be 2.69 and 2.73 which is above
2.50 but not greater than 3.0 for lateritic soils, this shows a high plasticity. The plasticity
index was obtained as 39.49% which indicates that the soil is not medium in plasticity. Also, from the sieve analysis, the soil is classified as an A-2-6 soil according to AASTHO. This value
indicates that it is good for subgrade material. Therefore, these soil reinforcement
techniques with orange peel can only be used for Trunk D roads or as subgrade materials
which require a minimum soaked CBR of 5%. For Trunk A, B and C roads, the mixture would
require a binder like cement before being considered as subbase and base course materials
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