Effective Method of Curing Improving the CBR

Flexible pavements are commonly constructed using locally available natural soils, but many of these soils fail to meet standard specifications, necessitating the use of alternative materials. Soil stabilization involves modifying the properties of soil through chemical or physical means to improve its engineering performance. One common method is to stabilize subgrade soils with stronger materials, such as cement. In this study, cement is used as a stabilizer to enhance the properties of graded gravel soil, making it suitable for use in road construction. The present investigation focuses on mixing graded gravel residue with varying percentages of cement and evaluating the compaction and California Bearing Ratio (CBR) characteristics of the mixes. These mixes were tested for their CBR values after different curing periods, including 3 days of moisture curing followed by 4 days of water curing. The results showed that the gravel residue-cement mixes achieved high dry densities and significant improvements in CBR values, demonstrating their potential for use in sub-base and base course layers of flexible pavements.