Abstract
The structures which are constructed over black cotton soil may tend to easy deformations due to its volume change and shrinking tendency. Among various soil deposits in Indian terrain, Black cotton soil belongs to the soil type’s most prevalent constituents. Due to rapid urbanization, constructions over these soils are unavoidable. Development of roads in places having black cotton soil affects strength and durability of the pavement to a large degree. It is vital to increase the soil's bearing capacity & behaviour in order for the pavement to endure its load. It is approximately that the building sector in India creates 10 to 12 million metric tonnes of garbage yearly, leading to a significant disposal challenge. These construction and demolition waste can be added in soil which may affect soil properties. For the present study, brick powder from debris has been used as a stabilizer in order to strengthen black cotton soil used in construction sub grades in pavements. In the current research, it is recommended to determine the optimal proportion of brick powders to be applied to black cotton soil or to investigate the features of BCS. The optimum percentage fixed by studying the literature. In this study the influence of brick powder with black cotton soil is observed separately. Black cotton soil and 6%, 8%, 10%, 12% brick powder blended soils were subjected to sieve analysis, Atterberg's limits, modified proctor, unrestricted compressive strength, and California bearing ratio examinations. The experiments were conducted with various quantities of brick powder, including 6%, 8%, 10%, and 12%. At the conclusion of all CBR testing, the findings indicated that the highest strength was achieved while 10% brick powder when combined with BCS. This shows that the minimum 10% brick powder is to be added in BCS which result in increase in the strength of soil as well as reduction in pavement construction cost as compared to less proportion (6%, 8%) which were tested. Finally, the pavement designing for 5%, 6%, and 7% CBR has been carried out, and the cost of constructing the pavement has been estimated. For available locally black cotton soil, the cost may be decreased by stabilizing it with waste brick powder.
Keywords: Sieve Analysis, Atterberg’s Limit, Modified Proctor, California Bearing Ratio test, Soil Stabilization, brick powder, Construction and Demolition waste, cost of construction.