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Stream/Area:
-
Subject:
-
Paper ID:
IJSREM68034
Volume:
10 |
10 |
Oct 2026
Pages:
1-6
Publication Frequency:
Monthly (12 issues per year)
License:International Journal of Scientific Research in Engineering and Management follows the Creative Commons Attribution 4.0 (CC BY 4.0) License, allowing free use and distribution with proper attribution.
Civil engineering
Sardar Beant Singh State University, Gurdaspur, Punjab, India
Civil engineering
Sardar Beant Singh State University, Gurdaspur, Punjab, India
Civil engineering
Sardar Beant Singh State University, Gurdaspur, Punjab, India
Expansive soils are difficult to work with as subgrade materials because they change a lot in size when the water content changes. This can lead to problems and damage in the roads built on them. This study looks at how natural coir fibre and waste plastic can help make expansive soil better for use in road building. The original soil without any changes was used as a base for comparison. Different amounts of coir fibre, waste plastic and a mix of both were tested. The findings show that adding coir fibre and waste plastic changes how the soil behaves. The original soil had a liquid limit of 40% and a plasticity index of 14%. When 0.3% coir fibre was added the liquid limit dropped to about 30%. The plasticity index dropped to about 11%. In a CBR test the original soil had a CBR of about 4.04%.. When coir fibre was used the CBR values went up. The highest was 9.60% with 0.3% coir fibre. A mix of 0.3% coir fibre and 10% waste plastic gave a CBR of about 6.08%. These results show that coir fibre and waste plastic can help make expansive soil better. They improve some of its properties compared to the soil. The mix of coir fibre and waste plastic also shows that it is possible to use waste and plastic waste in making better soil for roads. More lab tests are needed to find the mix and to check how long these materials last, in real road conditions.
KEYWORDS
· The addition of 0.3% coir fibre and 10% MSWPP modified the engineering behaviour of expansive soil. · Liquid Limit reduced from 40% to 30% and Plasticity Index from 14% to 11%. · CBR increased from 4.04% to 6.08%, showing improved subgrade bearing performance. · The treatment provides a practical way to reuse waste plastic and coir fibre in soil stabilization. · The combined approach has potential to improve expansive soil for pavement subgrade applications. · Further field trials, durability studies and detailed cost analysis are required before large-scale implementation.
o Khalak, A. A., & Juremalani, J. (2024). Evaluation of combined coir fibre and micro-shredded waste plastic for stabilising black cotton soil in road subgrades. Journal of Environmental Protection and Ecology, 25(6), 1866–1879. o Hassan, H. J. A., Rasul, J., & Samin, M. (2021). Effects of plastic waste materials on geotechnical properties of clayey soil. Transportation Infrastructure Geotechnology, o Peter, L., Jayasree, P. K., Balan, K., & Raj, S. A. (2016). Laboratory investigation in the improvement of subgrade characteristics of expansive soil stabilised with coir waste. Transportation Research Procedia, o Jayasree, P. K., Balan, K., Peter, L., & Nisha, K. K. (2015). Volume change behavior of expansive soil stabilized with coir waste. Journal of Materials in Civil Engineering, o Kumar, M., Pratap, B., Azhar, M., Mondal, S., & Singh, R. P. (2025). The utilization of plastic waste for stabilizing expansive soil subgrade: A critical review. Civil Engineering Infrastructures Journal o Naresh, T., Bandipally, S., Prasad, N. S. S., Skrzypkowski, K., Zagórski, K., & Zagórska, A. (2025). Sustainable stabilisation of expansive clay with shredded PET fibers: Multi-scale performance and microstructural analysis. Resources,
Publication Date
10/17/2026
Peer Review Type
Double-Blind Peer Review
Review Rounds: 2
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Conflict of Interest
The authors declare no conflict of interest related to this research work.
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