Quantitative evaluation of soil stabilization using RCA and GGBS: a statistical perspective

• Published in: Journal of building pathology and rehabilitation 2024-12, Vol.9 (2), Article 89
• Main Authors: Nanda, Sourav Kumar, Giri, Jyoti Prakash, Priyadarshini, Monalisa
• Format: Article
• Language: English
• Subjects: Building Materials; Building Repair and Maintenance; Energy Efficiency; Engineering; Engineering Thermodynamics; Heat and Mass Transfer; Research Article; Structural Materials
• ISSN: 2365-3159; 2365-3167
• DOI: 10.1007/s41024-024-00444-0

    The primary objective of this research was to explore the potential utilization of waste materials, specifically recycled concrete aggregate (RCA) and granulated blast-furnace slag (GGBS), in combination with black cotton soil for pavement infrastructure. To achieve this goal, the study undertook both experimental and statistical analyses of subgrade layer properties stabilized with RCA and GGBS. Various mechanical properties, like California bearing ratio (CBR) and unconfined compressive strength (UCS), were examined with different compositions. These compositions involved with the 15% replacement of soil to aggregate (natural and RCA) and binder (cement and GGBS). As a benchmark, no stabilization soil also considered in the investigation. The experimental findings indicated that soil stabilized with 10% natural aggregate and 5% cement offered higher result compared to other combinations considered. However, black cotton soil stabilized with 10% RCA and 5% GGBS also exhibited promising results in terms of CBR and UCS tests. To further validate these results, a probabilistic study was conducted, considering ten different probabilistic distributions. The selection of the best-fit distribution was based on goodness-of-fit (GOF) tests performed on available experimental data. However, out of ten distributions, the Log-normal distribution observed as most suitable for the soil, stabilized with RCA and GGBS. In summary, the integration of waste materials such as RCA and GGBS not only promising an acceptable result but also offering environmental benefits by contribute to the development of sustainable pavement construction.