Comparative Study on the Enhancement of Soil Cement Strength Using Bentonite and Polyurethane Foam

Pornkanok Rattanapituk; Salisa Chaiyaput; Jiratchaya Ayawanna; Namthip Kingnoi; Lindung Zalbuin   Mase; Thanadol  Kongsomboon

doi:10.55003/ETH.430302

Authors

Pornkanok Rattanapituk School of Engineering, King Mongkut’s Institute of Technology Ladkrabang, Thailand
Salisa Chaiyaput School of Engineering, King Mongkut’s Institute of Technology Ladkrabang, Thailand
Jiratchaya Ayawanna School of Ceramic Engineering, Institute of Engineering, Suranaree University of Technology, Thailand
Namthip Kingnoi School of Engineering, King Mongkut’s Institute of Technology Ladkrabang, Thailand
Lindung Zalbuin Mase Faculty of Engineering, University of Bengkulu, Indonesia
Thanadol Kongsomboon School of Engineering, King Mongkut’s Institute of Technology Ladkrabang, Thailand

DOI:

https://doi.org/10.55003/ETH.430302

Keywords:

Bentonite, Ground improvement, Polyurethane foam, Soil cement, Soil stabilization

Abstract

The construction of buildings and infrastructure on soft ground, such as soft Bangkok clay, presents significant geotechnical challenges due to its high compressibility, high settlement potential, and low bearing capacity. Consequently, soil-cement stabilization is widely applied to improve the strength of soft ground. This study evaluated the effects of bentonite and polyurethane foam as additive admixtures to increase the strength of soil cement. The primary purpose was to investigate compressive strength. Moreover, Scanning Electron Microscopy (SEM) was employed to examine the microstructure, which supports the primary purpose. The control specimen consisted of 80% soil and 20% cement by dry weight of the total soil-cement mixture. Bentonite and polyurethane foam contents of 10%, 20%, and 30% by dry weight of the total soil-cement mixture were investigated and added as additive admixtures to the soil-cement mixture. The results showed that adding bentonite and polyurethane foam can increase the strength of soil cement. The suitable ratios of bentonite and polyurethane foam were 30% and 10% by dry weight of the total soil-cement mixture, respectively. Moreover, both bentonite and polyurethane foam can increase compressive strength. This approach offers a pathway to more efficient, sustainable soil-cement stabilization methods to improve soft soils.

References

Engineering Institute of Thailand under H.M. the King’s Patronage, “Overview: Bangkok soft clay layer,” in Soil Profile of the Lower Chao Phraya River Basin. Bangkok, Thailand: Judthong Co., Ltd., 2002, ch. 4, sec. 4.1, pp. 4-1–4-6.

J. Ayawanna, N. Kingnoi, O. Sukchaisit, and S. Chaiyaput, “Utilization of ladle furnace slag from a steelwork for stabilization of soil cement,” Geomechanics and Engineering, vol. 31, no. 2, pp. 149–158, 2022, doi: 10.12989/gae.2022.31.2.149.

K. S. Thwe, J. Ayawanna, L. Z. Mase, and S. Chaiyaput, “Utilization of ladle furnace slag and fly ash as partially replacement of cement,” Cleaner Engineering and Technology, vol. 25, 2025, Art. no. 100910, doi: 10.1016/j.clet.2025.100910.

P. Sertsoongnern, J. Ayawanna, N. Kingnoi, and S. Chaiyaput, “Utilization of asphalt waste dust with fly ash in mixed cement materials for sustainable construction,” Sustainable Chemistry and Pharmacy, vol. 41, 2024, Art. no. 101699, doi: 10.1016/j.scp.2024.101699.

P. Sertsoongnern, J. Ayawanna, and S. Chaiyaput, “Performance evaluation of developed mixed cement containing asphalt waste dust and class-C fly ash in sulfate salt solution test,” Sustainable Chemistry and Pharmacy, vol. 42, 2024, Art. no. 101824, doi: 10.1016/j.scp.2024.101824.

J. Ayawanna, T. Suksawat, P. Sertsoongnern, and S. Chaiyaput, “The use of asphalt waste dust for stabilization of sustainable pavement recycling,” Construction and Building Materials, vol. 446, 2024, Art. no. 137936, doi: 10.1016/j.conbuildmat.2024.137936.

A. S. Devapriya and T. Thyagaraj, “Evaluation of red soil-bentonite mixtures for compacted clay liners,” Journal of Rock Mechanics and Geotechnical Engineering, vol. 16, no. 2, pp. 697–710, 2024, doi: 10.1016/j.jrmge.2023.04.006.

A. A. Ata, T. N. Salem, and N. M. Elkhawas, “Properties of soil-bentonite-cement bypass mixture for cutoff walls,” Constr. Build. Mater., vol. 93, pp. 950-956, 2015, doi: 10.1016/j.conbuildmat.2015.05.064.

K. Pruemphonchai, S. Tiyasangthong, and C. Suksiripatanapong, “Influence of Polymer Materials on Unconfined Compressive Strength of Soft Bangkok Clay Mixed with Portland Cement,” in The 27th National Convention on Civil Engineering, Chiang Rai, Thailand, Aug. 24–26, 2022, pp. GTE10-1–GTE10-5. [Online]. Available: https://conference.thaince.org/index.php/ncce27/article/view/1766/1083.

A. L. Yong, K. Ahmad, S. Saleh, N. Z. M. Yunus, and K. N. Mat Said, “Improving the Bearing Capacity of Marine Clay using Polyurethane Columns,” IOP Conference Series: Earth and Environmental Science, vol. 682, no. 1, 2021, Art. no. 012023, doi: 10.1088/1755-1315/682/1/012023.

P. Rattanapitak, A. Shelina, J. Ayawanna, N. Kingnoi, L. Z. Mase, and S. Chaiyaput, “Partial soil replacement in soil cement using bentonite and polyurethane foam,” Results in Engineering, vol. 30, 2026, Art. no. 111107, doi: 10.1016/j.rineng.2026.111107.

Standard Test Methods for Liquid Limit, Plastic Limit, and Plasticity Index of Soils, ASTM D4318-93, ASTM International, West Conshohocken, PA, USA, 1993.

Standard test method for laboratory determination of water (moisture) content of soil and rock by mass, ASTM D2216-98, ASTM International, West Conshohocken, PA, USA, 1998.

Standard Practice for Correction of Unit Weight and Water Content for Soils Containing Oversize Particles, ASTM D4718-87, ASTM International, West Conshohocken, PA, USA, 1987.

Standard Test Methods for Specific Gravity of Soil Solids by Water Pycnometer, ASTM D854-00, ASTM International, West Conshohocken, PA, USA, 2000.

Standard Test Method for Particle-Size Distribution (Gradation) of Fine-Grained Soils Using the Sedimentation (Hydrometer) Analysis, ASTM D7928-17, ASTM International, West Conshohocken, PA, USA, 2017.

Standard Test Methods for Particle-Size Distribution (Gradation) of Soils Using Sieve Analysis, ASTM D6913-17, ASTM International, West Conshohocken, PA, USA, 2017.

HYDRAULIC CEMENT, TIS 2594-2567, Thai Industrial Standards Institute, Ministry of Industry, Bangkok, Thailand, 2025.

Standard Performance Specification for Hydraulic Cement, ASTM C1157, ASTM International, West Conshohocken, PA, USA, 2023.

F. Wang, K. Li, and Y. Liu, “Optimal water-cement ratio of cement-stabilized soil,” Construction and Building Materials, vol. 320, 2022, Art. no. 126211, doi: 10.1016/j.conbuildmat.2021.126211.

SCG Cement-Building Materials, “SCG Hybrid Structural Cement” (2020). Distributed by SCG Cement-Building Materials. https://dam-production.scghome.com//files/assets/Product Application Media/Brochure/Brochure/Mortar/Catalog Hibrid.pdf.

Krungthepchemi Co., Ltd., “Calcium bentonite product specification and physical-chemical properties,” Krungthepchemi Co., Ltd., Bangkok, Thailand, Technical Data Sheet, 2025.

S. Saleh, N. Z. M. Yunus, K. Ahmad, and N. Ali, “Stabilization of Marine Clay Soil Using Polyurethane,” MATEC Web of Conferences, vol. 250, 2018, Art. no. 01004, doi: 10.1051/matecconf/201825001004.

M. Sabri, A. Bugrov, S. Panov, and V. Davidenko, “Ground improvement using an expandable polyurethane resin,” MATEC Web of Conferences, vol. 245, 2018, Art. no. 01004, doi: 10.1051/matecconf/201824501004.

Standard Test Method for Water Absorption of Rigid Cellular Plastics, ASTM D2842-19,ASTM International, West Conshohocken, PA, USA, 2019.

Standard Test Method for Compressive Strength of Cylindrical Concrete Specimens, ASTM C39/C39M-23, ASTM International, West Conshohocken, PA, USA, 2023.

Standard Practice for Making and Curing Concrete Test Specimens in the Laboratory, ASTM C192/C192M-24, ASTM International, West Conshohocken, PA, USA, 2024.

H. H. M. Darweesh and Z. A. Nagieb, “Hydration of calcined bentonite Portland blended cement pastes,” Indian Journal of Chemical Technology, vol. 14, pp. 301–307, 2007.

Standard Test Method for Compressive Strength of Molded Soil-Cement Cylinders, ASTM D1633-17, ASTM International, West Conshohocken, PA, USA, 2017.

A. M. Neville, “Further aspects of hardened concrete,” in Properties of Concrete, 5th ed. Harlow, England: Pearson Education Limited, 2011, ch. 7, pp. 518–582.

Z. Feng, Z. Zhang, Q. Tang, and Y. Zhou, “Mechanical properties and microscopic research of different types of bentonite in conjunction with cement and fine sand,” Soils and Foundations, vol. 65, no. 2, 2025, Art. no. 101573, doi: 10.1016/j.sandf.2025.101573.

H. Nath, M. H. Kabir, A. A. Kafy, Z. A. Rahaman, and M. T. Rahman, “Geotechnical properties and applicability of bentonite-modified local soil as landfill and environmental sustainability liners,” Environmental and Sustainability Indicators, vol. 18, 2023, Art. no. 100241, doi: 10.1016/j.indic.2023.100241.

M. M. Salah, M. S. Hammad, A. L. Fayed, and A. M. Ebid, “The influence of Bentonite content on the properties of its mixture with Kaolinite,” Scientific Reports, vol. 15, no. 1, 2025, Art. no. 10982, doi: 10.1038/s41598-025-89001-4.

N. Cristelo, S. Glendinning, L. Fernandes, and A. T. Pinto, “Effect of calcium content on soil stabilisation with alkaline activation,” Construction and Building Materials, vol. 29, pp. 167–174, 2012, doi: 10.1016/j.conbuildmat.2011.10.049.

Y. H. M. Amran, N. Farzadnia, and A. A. Abang Ali, “Properties and applications of foamed concrete; A review,” Constr. Build. Mater., vol. 101, pp. 990–1005, 2015, doi: 10.1016/j.conbuildmat.2015.10.112.

M. Amran, Y. H. Lee, N. Vatin, R. Fediuk, S. Poi-Ngian, Y. Y. Lee, and G. Murali, “Design Efficiency, Characteristics, and Utilization of Reinforced Foamed Concrete: A Review,” Crystals, vol. 10, no. 10, 2020, Art. no. 948, doi: 10.3390/cryst10100948.

NRMCA, “Testing Compressive Strength of Concrete,” National Ready Mixed Concrete Association, Alexandria, VA, USA, CIP 35, 2021. Accessed: Oct. 30, 2025. [Online]. Available: https://www.nrmca.org/wp-content/uploads/2021/01/35pr.pdf.

S. Chaiyaput, N. Arwaedo, N. Kingnoi, T. Nghia-Nguyen, and J. Ayawanna, “Effect of curing conditions on the strength of soil cement,” Case Studies in Construction Materials, vol. 16, 2022, Art. no. e01082, doi: 10.1016/j.cscm.2022.e01082.

A. R. Estabragh, P. Namdar, and A. A. Javadi, “Behavior of cement-stabilized clay reinforced with nylon fiber,” Geosynthetics International, vol. 19, no. 1, pp. 85–92, 2012, doi: 10.1680/gein.2012.19.1.85.

M. Szycher, “Polyurethanes,” in Szycher's Handbook of Polyurethanes, 2nd ed. Boca Raton, FL, USA: CRC Press, 2012, ch. 1, sec. 1.2, pp. 2–12.

B. Pokharel and S. Siddiqua, “Effect of calcium bentonite clay and fly ash on the stabilization of organic soil from Alberta, Canada,” Engineering Geology, vol. 293, 2021, Art. no. 106291, doi: 10.1016/j.enggeo.2021.106291.