![]() Geotechnical tests were used to determine the physical and compaction characteristics of the studied materials. The manufactured soil concrete is a mixture of granitic aggregates and lateritic gravels. This blend was estimated to be 21.6 % cheaper to stabilize than lime stabilization.Ī methodology of in-situ mixing of soil concrete in a quarry has been proposed to guarantee the required characteristics after implementation. A blend of 50 % crushed rock aggregates and 50 % lateritic soils was found to be the most effective in producing base material meeting the requirements of CBR above 80 % as per the General Specifications for Road and Bridges (2004) of the Ministry of Works, Housing and Communication in Uganda. ![]() All the soils were improved by the stabilizer for use in base course construction. The laboratory program included particle size distribution, specific gravity, Atterberg limits, standard compaction, strength and mechanical tests such as Aggregate Crushing Value, Los Angles Abrasion value and California Bearing Ratio. Three locally available and marginally suitable base materials, typical of the soils within Eastern Uganda were blended with varying proportions of readily available crushed rock aggregates. ![]() However, in Uganda, observations from previous road projects nationwide has shown none or little opportunity of locating the desired resources. ![]() Utilization of local construction materials, especially for low volume unpaved gravel roads in third world countries, lowers road construction costs hence making them feasible. ![]()
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