Use of gypsum and bagasse ash for stabilization of low plastic and high plastic clay

Document Type: Research Paper


NUST Institute of Civil Engineering, National University of Science and Technology, NUST, Islamabad, Pakistan.



Clays have a tendency to undergo volumetric changes when they interact with water. These soils are a very common reason for most of the foundation failures due to their degraded properties. With the growing need of infrastructure development, avoiding these soils for future constructions may not be possible. The present research is intended to examine the effect of gypsum and bagasse ash on the properties of clays and evaluate their potential for the stabilization and improvement of engineering properties of these soils. Gypsum is naturally occurring mineral and bagasse ash is a waste product produced by sugar-mills. Two types of swelling clays i.e. Low plastic, and high plastic clay, are used in this research for stabilization. Atterberg’s limits, compaction characteristics, unconfined compressive strength, California Bearing Ratio and swell potential of these soils are determined in both untreated as well as in treated form with varying content of gypsum and bagasse ash. The improvement observed for the combination of gypsum and bagasse ash is more significant as compared to the individual effect of gypsum or bagasse ash. Results obtained indicate that gypsum and bagasse ash can provide an effective and economical method for the improvement of Low and high plastic clays.


[1]     Alavéz-Ramírez, R., Montes-García, P., Martínez-Reyes, J., Altamirano-Juárez, D. C., & Gochi-Ponce, Y. (2012). The use of sugarcane bagasse ash and lime to improve the durability and mechanical properties of compacted soil blocks. Construction and building materials, 34, 296-305. doi: 10.1016/j.conbuildmat.2012.02.072

[2]     ASTM D1883-99. (n.d.). Standard test method for cbr (california bearing ratio) of laboratory-compacted soil. Retrieved from

[3]     ASTM D2166 / D2166M-16. (n.d.). Standard test method for unconfined compressive strength of cohesive soil. Retrieved from

[4]     ASTM D2216-10. (n.d.). Standard test methods for laboratory determination of water (moisture) content of soil and rock by mass. Retrieved from

[5]     ASTM D422-63 (2007) e2.  (2016). Standard test method for particle-size analysis of soils (Withdrawn 2016). Retrieved from

[6]     ASTM D4546-14. (n.d.). Standard test methods for one-dimensional swell or collapse of soils. Retrieved from

[7]     ASTM D698-12e2. (n.d.). Standard test methods for laboratory compaction characteristics of soil using standard effort (12 400 ft-lbf/ft3 (600 kn-m/m3)). Retrieved from

[8]     ASTM D7928-17. (n.d.). Standard test method for particle-size distribution (gradation) of fine-grained soils using the sedimentation (hydrometer) analysis. Retrieved from

[9]     Basha, E. A., Hashim, R., Mahmud, H. B., & Muntohar, A. S. (2005). Stabilization of residual soil with rice husk ash and cement. Construction and building materials, 19 (6), 448-453. doi:10.1016/j.conbuildmat.2004.08.001

[10] Holtz, R. D., & Kovacs, W. D. (1981). An introduction to geotechnical engineering (No. Monograph). Prentice Hall, Englewood.

[11] Jones, D. E., & Holtz, W. G. (1973).  Expansive soils -- the hidden disaster. Emmitsburg, MD: National Emergency Training Center.

[12] Kolay, P. K., & Pui, M. P. (2010). Peat stabilization using gypsum and fly ash. UNIMAS E-journal of civil engineering, 1 (2)

[13] Negi, A. S., Faizan, M., Siddharth, D. P., & Singh, R. (2013). Soil stabilization using lime. International journal of innovative research in science, engineering and technology, 2(2), 448-453.

[14] Nsaif, A. L. M. H. (2013). The behavior of soils strengthened by plastic waste materials. Journal of engineering and development, 17 (4).

[15] Osinubi, K. J., Bafyau, V., & Eberemu, A. O. (2009). Bagasse ash stabilization of lateritic soil. In Appropriate technologies for environmental protection in the developing world (pp. 271-280). Springer Netherlands

[16] Rajakumaran, K. (2015). An experimental analysis on stabilization of expansive soil with steel slag and fly ash. International journal of advances in engineering & technology, 7 (6), 1745.

[17] Jamsawang, P., Poorahong, H., Yoobanpot, N., Songpiriyakij, S., & Jongpradist, P. (2017). Improvement of soft clay with cement and bagasse ash waste. Construction and building materials, 154, 61-71

[18] Rengasamy P., & Sumner, M. E. (1998). Processes involved in sodic behavior. In Sodic soils, distribution, properties, management, and environmental consequences, M. E. Sumner & R. Naidu (Eds.), pp. 35-50. New York Press, New York.

[19] Seed, H. B., & Lundgren, R. (1962). Prediction of swelling potential for compacted clays. Journal of the soil mechanics and foundations division, 88(3), 53-88.

[20] Walworth, J. (2012). Using gypsum and other calcium amendments in southwestern soils. Publication   AZ1413, College of Agriculture and Life Sciences, University of Arizona.

[21] Yilmaz, I. (2004). Relationships between liquid limit, cation exchange capacity, and swelling potentials of clayey soils. Eurasian soil science, 37(5), 506-512.

[22] Rajeswari, K., Naidu, C. D., Rao, K. B., & Kumari, G. H. (2018). Study of soil stabalization on subgrade using bagasse ash and phosphogypsum. Int. J. Technol. Res. Eng, 5, 3133-3142.