JETI Admin2
Abstract
Industrial wastes can become a useful source of cheap materials for soil stabilization, thereby reducing the cost of construction projects on sites that have unsuitable soils. This research work aimed at stabilizing deficient laterite using iron ore tailings (IOT) and cement to determine its geotechnical properties in order to assess the suitability of the stabilized soil for use as a road pavement material. Tests to determine the particle size distribution, specific gravity, atterberg’s limits, compaction and California bearing ratio (CBR) with varying percentages of IOT and 4 % cement was carried out. The laterite soil was classified as A-7-6. The results showed that adding 4% cement and 2-10% IOT decreased the plasticity index, thus improving the soil's index properties. Increase in IOT increases the MDD of the soil and reduces the OMC, which improves the grading of the soil and increases the density of the laterite mixture. The CBR result shows an increase from 2 to 6 % and slightly decreases from 8 to 10 %, which indicates a maximum increase in CBR value for the mixture of laterite containing 4 % cement and 6 % IOT (164 %), which also improves the condition of sub-grade soil efficiently. The additives of cement and IOT improves the engineering characteristics of deficient soil, reduces its plasticity index and increases its strength properties. Based on strength properties of the stabilized soil, an optimal application of 6% IOT with 4% cement was found suitable for the stabilization of deficient laterite which is recommended as a cheap and sustainable approach.
References
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