COMPARATIVE STUDY OF STABILIZATION OF SUB-BASE ROAD PAVEMENT LAYER USING MOLASSES AND CEMENT

ABSTRACT

Road construction has become very expensive due to the increase costs on raw materials especially cement. This research seeks to come up with an appropriate technology that is suitable, sustainable and economically adaptable.  Molasses is thereby investigated to establish its suitability as an improvement material for neat lateritic gravel.

 

This research involves an investigation on the effect of molasses on some geotechnical properties of a lateritic soil for sub-base purposes. The investigation includes evaluation of properties such as compaction, attergbergs limits and strength of the soil with molasses and cement content of various ratios by weight of the dry soil.

The possibility of including molasses in the process of soil improvement/stabilization was carried out during this study with results supporting the same. Laboratory tests were carried out and the results from this study indicate that molasses can be used as an additive to cement when improving the engineering properties of the gravel used with an impact of reducing the cost of the improvement while still achieving the set standards.

Molasses, being a sugar, retards the setting of cement by about 4 hours. The results from this study have shown that addition of 1.0% molasses has an improving quality on the strength of cement improved gravel improving the CBR by about 8.2%. The combination of the increase in strength and delay in setting can be a welcome relief in road construction where there would be a reduction in cost and shorter construction periods respectively.

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