Effect of Relative Density Variation on The Effectiveness of Fly Ash in Stabilization of Sandy Soils for Liquefaction Mitigation

  • Yunan Yakuta Wangsawitana Department of Civil and Environmental Engineering, IPB University, Bogor, INDONESIA
  • Muhammad Fauzan Department of Civil and Environmental Engineering, IPB University, Bogor, INDONESIA
  • Heriansyah Putra Department of Civil and Environmental Engineering, IPB University, Bogor, INDONESIA
  • Erizal Department of Civil and Environmental Engineering, IPB University, Bogor, INDONESIA
  • Minson Simatupang Departement of Civil Engineering, Halu Oleo University, Kendari, INDONESIA
DOI: https://doi.org/10.22146/jcef.26551
Keywords: Fly Ash, liquefaction, relative density, saturated sand, UCS

Abstract

Indonesia is highly vulnerable to earthquakes that can trigger soil liquefaction, particularly in coastal regions where saturated sandy soils with low relative densities are prevalent. This study investigated the influence of varying Class C fly ash contents (5%, 10%, and 15%), relative densities (50%, 70%, and 90%), and curing periods (7 and 14 days) on the unconfined compressive strength of fully saturated sandy soils as a liquefaction mitigation approach. The methodology included physical soil characterization, sample preparation with specific fly ash and relative density variations, and unconfined compressive strength testing after the curing period. The results demonstrated that increasing the fly ash content, relative density, and curing time significantly enhanced the strength of the samples. The highest strength occurred at 15% fly ash and 90% relative density, with 426.22 kPa (7 days) and 438.57 kPa (14 days). The most notable improvement occurred with an increase in fly ash content from 5% to 10% and relative density from 50% to 70%. Fly ash was more effective at enhancing the strength of sandy soil by promoting interparticle cementation, whereas excessive compaction tended to disrupt the soil structure and generate fine particles that reduced cohesion, as evidenced by the UCS test results and SEM observations. The most significant strength gain between 7 and 14 days was observed at 50% relative density and 5% fly ash, with a twofold increase. The combination of 10% fly ash and 70% relative density was optimal for field implementation, as it yielded strength values exceeding the liquefaction resistance thresholds, while maintaining practical compaction levels and material efficiency. A comparative cost assessment considering materials, labor, equipment, and construction time is recommended to evaluate the practical feasibility of fly ash stabilization relative to alternative ground improvement methods for Indonesian projects.

References

Adinda, B. T. D., Prabowo, A. and Muchtaranda, I. H. (2019), ‘Pengaruh perkuatan geotekstil tipe woven gx-50 terhadap keruntuhan pondasi pada pasir pantai dengan variasi kedalaman muka air’, Spektrum Sipil 6(1), 23–31. URL: https://doi.org/10.29303/spektrum.v6i1.150

American Society for Testing and Materials (2009), Standard test method for density, relative density (specific gravity), and absorption of fine aggregate (astm c128-78), Technical report, ASTM International, West Conshohocken. URL: https://www.astm.org

American Society for Testing and Materials (2011), Standard practice for classification of soils for engineering purposes (unified soil classification system) (astm d2487-11), Technical report, ASTM International, West Conshohocken. URL: https://doi.org/10.1520/D2487-11

Andariana, O. A., Hasyim, A., Hamsyah, E. F. and Yusuf, M. (2024), ‘Pelatihan ipa sederhana bagi peserta didik di pulau bonetambu’, Jurnal Pengabdian Kepada Masyarakat (J-ABDI) 3(11), 2279–2288.

Anidhea, N. O. and Suliyanah (2021), Identifikasi karakteristik struktur tanah dan mitigasi bencana likuifaksi di sulawesi tengah, in ‘Prosiding Seminar Nasional Fisika (SNF)’, Surabaya, Indonesia.

Annisa, R. and Widayanti, A. (2025), ‘Karakteristik limbah keramik, agregat alam, dan filler fly ash untuk campuran lapis aus asphalt concrete – wearing course (ac-wc)’, Jurnal Media Publikasi Terapan Transportasi 3(1), 61–69. URL: https://doi.org/10.26740/mitrans.v3n1.p61-69

Arumningsih, D. (2013), ‘Biaya dan kebutuhan alat berat untuk pemindahan tanah’, Jurnal Teknik Sipil Dan Arsitektur 14(18), 1–15.

Aydilek, A. H. and Arora, S. (2005), ‘Class f fly ash amended soils as highway base materials’, Journal of Materials in Civil Engineering 17(6), 1–10. URL: https://doi.org/10.1061/(ASCE)0899-1561(2005)17:6(640

Bagheri, I., Kalhori, S. B., Akef, M. and Khormali, F. (2012), ‘Effect of compaction on physical and micromorphological properties of forest soils’, American Journal of Plant Sciences 03(01), 159–163. URL: https://doi.org/10.4236/ajps.2012.31018

Baloochi, H. (2022), Use of alternative materials in soil stabilization: mechanical and environmental aspects, Doctoral thesis report, Universitat Politècnica de Catalunya, UPC BarcelonaTech, Barcelona.

Bensoula, M., Bousmaha, M. and Missoum, H. (2022), ‘Relative density influence on the liquefaction potential of sand with fines’, Revista de la Construcción 21(3), 692–702. URL: https://doi.org/10.7764/RDLC.21.3.692

Briaud, J. L. (2013), Geotechnical Engineering: Unsaturated and Saturated Soils, second edition edn, John Wiley & Sons, New Jersey.

Chyliński, F. (2024), ‘Microstructural assessment of pozzolanic activity of ilmenite mud waste compared to fly ash in cement composites’, Materials 17(11), 1–18. URL: https://doi.org/10.3390/ma17112483

Cristelo, N., Glendinning, S. and Pinto, A. T. (2011), ‘Deep soft soil improvement by alkaline activation’, Proceedings of the Institution of Civil Engineers - Ground Improvement 164(2), 73–82. URL: https://doi.org/10.1680/grim.900032

Darwis (2018), Dasar-Dasar Mekanika Tanah, Pena Indis, Yogyakarta.

Di Sante, M., Khan, M. K., Calò, L., Fratalocchi, E. and Mazzieri, F. (2025), ‘The combined use of fly ash and lime to stabilize a clayey soil: a sustainable and promising approach’, Geosciences 15(9), 1–17. URL: https://doi.org/10.3390/geosciences15090346

Dissanayake, T. B. C. H., Senanayake, S. M. C. U. and Nasvi, M. C. M. (2017), ‘Comparison of the stabilization behavior of fly ash and bottom ash treated expansive soil’, Engineer: Journal of the Institution of Engineers, Sri Lanka 50(1), 11–19. URL: https://doi.org/10.4038/engineer.v50i1.7240

Dong, L., Cao, J. and Liu, X. (2022), ‘Recent developments in sea-level rise and its related geological disasters mitigation: a review’, Journal of Marine Science and Engineering 10(3), 1–20. URL: https://doi.org/10.3390/jmse10030355

Febrian, L., Susilo, A. J. and Setiawan, A. P. (2024), ‘Analisis perubahan kuat geser pada tanah lempung dan pasir akibat penambahan fly ash tipe c’, JMTS: Jurnal Mitra Teknik Sipil 4(7), 1137–1144. URL: https://doi.org/10.24912/jmts.v7i4.30820

Frempong, E. B. and Shukla, S. K. (2018), ‘Stability analysis and design charts for a sandy soil slope supporting an embedded strip footing’, International Journal of Geo-Engineering 9(1), 1–23. URL: https://doi.org/10.1186/s40703-018-0082-2

Golewski, G. L. (2022), ‘The role of pozzolanic activity of siliceous fly ash in the formation of the structure of sustainable cementitious composites’, Sustainable Chemistry 3(4), 520–534. URL: https://doi.org/10.3390/suschem3040032

Government of the Republic of Indonesia (2021), Peraturan pemerintah nomor 22 tahun 2021 tentang penyelenggaraan perlindungan dan pengelolaan lingkungan hidup, Technical report, Kementerian Sekretariat Negara, Jakarta.

Gunawan, G. and Nono (2019), ‘Potensi pemanfaatan bahan limbah fly ash dan bottom ash untuk lapisan fondasi jalan semen (potential for utilization of fly ash and bottom ash waste materials for cement road foundation)’, Jurnal Jalan-Jembatan 36(1), 19–29.

Gupta, G., Sood, H. and Gupta, P. K. (2024), ‘Economic and environmental assessment of industrial wastes stabilized clay and sand soil subgrades using experimental and theoretical approaches’, Construction and Building Materials 422(1), 1–55. URL: https://doi.org/10.1016/j.conbuildmat.2024.135787

Herwandi, Marsudi and Aprianto (2017), Pengaruh gradasi dan kepadatan relatif (dr) terhadap nilai permeabilitas tanah pasir, Technical report, Universitas Tanjungpura, Pontianak.

Igwe, O. (2018), ‘The combined effect of particle size distribution and relative density on the large strain behavior of sandy soils’, Geotechnical and Geological Engineering 36(2), 1037–1048. URL: https://doi.org/10.1007/s10706-017-0372-z

Karthikeyan, K. R. and George, E. H. (2023), ‘A review on effect of soil stabilization using alkali activated geopolymer’, Sustainability, Agri, Food and Environmental Research 10(10), 1–11. URL: https://doi.org/10.7770/safer-V10N1-art2463

Keramatikerman, M., Chegenizadeh, A. and Nikraz, H. (2017), ‘Experimental study on effect of fly ash on liquefaction resistance of sand’, Soil Dynamics and Earthquake Engineering 1(93), 1–6. URL: https://doi.org/10.1016/j.soildyn.2016.11.012

Koester, J. P. and Tsuchida, T. (1988), Earthquake-induced liquefaction of fine-grained soils-considerations from japanese research, Technical report, Port and Harbor Research Institute, Yosaka.

Kolias, S., Kasselouri-Rigopoulou, V. and Karahalios, A. (2005), ‘Stabilisation of clayey soils with high calcium fly ash and cement’, Cement and Concrete Composites 27(2), 301–313. URL: https://doi.org/10.1016/j.cemconcomp.2004.02.019

Laia, B. (2015), ‘Pengaruh kerapatan tanah pasir kali opak pleret yogyakarta terhadap potensi likuifaksi berdasarkan uji shaking table’, Jurnal Inersia 7(1), 40–49.

Legrans, R. R. (2016), ‘Studi potensi likuifaksi berdasarkan uji penetrasi standar (spt) di pesisir pantai belang minahasa tenggara’, TEKNO 14(65), 37–48. URL: https://doi.org/10.35793/jts.v14i65.11924

Lestari, P. (2022), Hubungan antara permeabilitas dengan diameter efektif (d10) pada tanah pasir di pantai padang, Bachelor thesis report, Universitas Andalas, Padang.

Mahvash, S., López-Querol, S. and Bahadori-Jahromi, A. (2017), ‘Effect of class f fly ash on fine sand compaction through soil stabilization’, Heliyon 3(3), e00274. URL: https://doi.org/10.1016/j.heliyon.2017.e00274

Marsindi, D., Simatupang, M. and Kadir, A. (2022), ‘Pengaruh curing time dan derajat kejenuhan terhadap kuat tekan bebas dan kuat tarik belah pada campuran pasir dan fly ash’, Jurnal Ilmiah Teknik Sipil 10(3), 116–123. URL: https://doi.org/10.55679/jts.v10i3.31247

Mawlood, Y., Salih, A., Hummadi, R., Hasan, A. and Ibrahim, H. (2021), ‘Comparison of artificial neural network (ann) and linear regression modeling with residual errors to predict the unconfined compressive strength and compression index for erbil city soils, kurdistan-iraq’, Arabian Journal of Geosciences 14(485), 1–14. URL: https://doi.org/10.1007/s12517-021-06712-4

Mehta, P. K. (2004), High-performance, high-volume fly ash concrete for sustainable development, Master thesis report, University of California, Berkeley.

Ministry of Public Works and Public Housing (PUPR) (2022), Peta deagregasi bahaya gempa indonesia untuk perencanaan dan evaluasi infrastruktur tahan gempa, Technical report, Direktorat Bina Teknik Permukiman dan Perumahan, Jakarta.

Misra, A. (1998), ‘Stabilization characteristics of clays using class c fly ash’, Transportation Research Record: Journal of the Transportation Research Board 1611(1), 46–54. URL: https://doi.org/10.3141/1611-06

Mohsen, M. O., Aburumman, M. O., Al Diseet, M. M., Taha, R., Abdel-Jaber, M., Senouci, A. and Abu Taqa, A. (2023), ‘Fly ash and natural pozzolana impacts on sustainable concrete permeability and mechanical properties’, Buildings 13(8), 1–19. URL: https://doi.org/10.3390/buildings13081927

National Standardization Agency of Indonesia (2008), Cara uji berat jenis tanah (sni 1964:2008), Technical report, BSN, Jakarta. URL: http://www.bsn.go.id

National Standardization Agency of Indonesia (2012), Metode uji kuat tekan-bebas tanah kohesif (sni 3638:2012), Technical report, BSN, Jakarta. URL: http://www.bsn.go.id

Noaman, M. F., Khan, M. A., Ali, K. and Hassan, A. (2022), ‘A review on the effect of fly ash on the geotechnical properties and stability of soil’, Cleaner Materials 6(1), 1–14. URL: https://doi.org/10.1016/j.clema.2022.100151

Nurdiyanto, T. D., Fatah, I. A. N. and Rochim, A. (2024), ‘Pengaruh penambahan fly ash dan kapur pada tanah lempung ekspansif terhadap uji cbr’, Jurnal Ilmiah Sultan Agung 3(3), 208–218.

Osok, F. K., Simatupang, M. and Makmur, M. (2023), ‘Penerapan fly ash sebagai bahan sementasi dalam pendekatan perbaikan tanah’, Jurnal Ilmiah Teknik Sipil 11(2), 97–103.

Pandian, N. S. (2004), ‘Fly ash characterization with reference to geotechnical applications’, Journal of the Indian Institute of Science 84, 189–216.

Pangaribuan, E. A. S., Darmawati, A. and Budiyanto, S. (2020), ‘Pertumbuhan dan hasil tanaman pakchoy pada tanah berpasir dengan pemberian biochar dan pupuk kandang sapi’, Agrosains: Jurnal Penelitian Agronomi 22(2), 72–78. URL: https://doi.org/10.20961/agsjpa.v22i2.42093

Park, D. Y., Chang, I., Lee, M. and Cho, G. C. (2025), ‘Enhancing soil liquefaction resistance and small-strain dynamic properties using cation-crosslinked biopolymer hydrogel’, Soil Dynamics and Earthquake Engineering 190, 1–12. URL: https://doi.org/10.1016/j.soildyn.2025.109212

Pratiwi, D. S. (2020), ‘Evaluasi perbaikan tanah menggunakan rapid impact compaction pada tanah berpotensi likuefaksi’, Jurnal Teknologi Ramah Lingkungan 4(2), 82–92. URL: https://doi.org/10.26760/jrh.v4i2.82-92

Rahmayanti, R., Bahar, F. F. and Nuklirullah, M. (2023), ‘Pemanfaatan dan pengaruh fly ash batu bara sebagai substitusi sebagian semen terhadap nilai kuat tekan bata ringan jenis cellular lightweight concrete (clc)’, Siklus: Jurnal Teknik Sipil 9(2), 218–228. URL: https://doi.org/10.31849/siklus.v9i2.11438

Ruiz-Chávez, F. D. J., Gutiérrez-Villalobos, J. M. and Arroyo, H. (2022), ‘Characterization of the relationship soil density and simple compression resistance of silty soils’, Revista de Ingeniería Mecánica 6(18), 15–20. URL: https://doi.org/10.35429/jme.2022.18.6.15.20

Sakaguchi, A., Nishimura, T. and Kato, M. (2005), ‘The effect of entrapped air on the quasi-saturated soil hydraulic conductivity and comparison with the unsaturated hydraulic conductivity’, Vadose Zone Journal 4(1), 139–144. URL: https://doi.org/10.2136/vzj2005.0139

Santana, T., Gonçalves, J., Pinho, F. and Micaelo, R. (2021), ‘Effects of the ratio of porosity to volumetric cement content on the unconfined compressive strength of cement bound fine grained soils’, Infrastructures 6(7), 1–19. URL: https://doi.org/10.3390/infrastructures6070096

Sholihah, S. M., Hoesain, I. M. and Sulistyowati, T. (2019), ‘Pengaruh variasi kedalaman muka air terhadap keruntuhan pondasi pada tanah pasir pantai dengan perkuatan anyaman bambu’, Spektrum Sipil 6(1), 69–77. URL: https://doi.org/10.29303/spektrum.v6i1.147

Siddique, R. (2004), ‘Performance characteristics of high-volume class f fly ash concrete’, Cement and Concrete Research 34(3), 487–493. URL: https://doi.org/10.1016/j.cemconres.2003.09.002

Simatupang, M., Edwin, R. S., Sulha, Mustika, W., Putra, H. and Yanto, D. H. Y. (2022), ‘Splitting tensile strength of fly ash-modified sand at various saturation and curing time’, Infrastructures 7(126), 1–16. URL: https://doi.org/10.3390/infrastructures7100126

Simatupang, M., Mangalla, L. K., Edwin, R. S., Putra, A. A., Azikin, M. T., Aswad, N. H. and Mustika, W. (2020), ‘The mechanical properties of fly-ash-stabilized sands’, Geosciences 10(132), 1–19. URL: https://doi.org/10.3390/geosciences10040132

Temiz, C. (2022), Retracted: Scanning electron microscopy, in ‘Electron Microscopy’, IntechOpen. URL: https://doi.org/10.5772/intechopen.103956

Transportation Research Board (1986), State of the art report 5: Reactions, properties, design, and construction, Technical report, National Academy Press, Washington DC.

Turan, C., Javadi, A. A. and Vinai, R. (2022), ‘Effects of class c and class f fly ash on mechanical and microstructural behavior of clay soil—a comparative study’, Materials 15(5), 11–24. URL: https://doi.org/10.3390/ma15051845

Turan, C., Javadi, A., Vinai, R., Shariatmadari, N. and Farmani, R. (2020), Use of class c fly ash for stabilization of fine-grained soils, in ‘E3S Web of Conferences’, Vol. 195, pp. 1–5. URL: https://doi.org/10.1051/e3sconf/202019506001

Ulum, M. B. (2014), Karakteristik fisik dan kimia fly ash dari perusahaan ready mix beton dan limbah pabrik terhadap sifat mekanik pasta dan mortar, Bachelor thesis report, Institut Teknologi Sepuluh Nopember, Surabaya.

Upadhyay, A., Kamal, M., Pal, B. K. and Tripathy, D. P. (2007), Characterization and utilization of fly ash, Bachelor thesis report, National Institute Of Technology Rourkela, Orissa.

Vennapusa, C. S. R. and Eluru, A. (2025), ‘Microstructural and mechanical evaluation of hvfac incorporating recycled plastic flakes and pozzolanic additives for environmental sustainability’, Environmental Challenges 20(1), 1–29. URL: https://doi.org/10.1016/j.envc.2025.101196

Yadav, V. K., Yadav, K. K., Tirth, V., Jangid, A., Gnanamoorthy, G., Choudhary, N., Islam, S., Gupta, N., Son, C. T. and Jeon, B. H. (2021), ‘Recent advances in methods for recovery of cenospheres from fly ash and their emerging applications in ceramics, composites, polymers and environmental cleanup’, Crystals 11(9), 1–20. URL: https://doi.org/10.3390/cryst11091067

Yazici, E. and Unsever, Y. S. (2024), ‘Investigation of cement and fly ash on the improvement of fine sand soil’, Applied Sciences 14(7), 1–10. URL: https://doi.org/10.3390/app14072908

Zen, K., Jeng, D., Hsu, J. and Ohyama, T. (1998), ‘Remedial measures for reclaimed land by premixing method’, Soil Mechanics and Foundation Engineering 42(3), 37–42.

Zeybek, A. and Madabhushi, G. S. P. (2017), ‘Durability of partial saturation to counteract liquefaction’, Proceedings of the Institution of Civil Engineers: Ground Improvement 170(2), 102–111. URL: https://doi.org/10.1680/jgrim.16.00025

Zhang, H., Ren, H., Mu, C., Wu, X., Huang, K. and Wang, F. (2023), ‘Experiment study on the influence of density and confining pressure on triaxial shear properties of calcareous sand’, Materials 16(4), 1–14. URL: https://doi.org/10.3390/ma16041683

Published
2026-05-04
How to Cite
Wangsawitana , Y. Y., Fauzan , M., Putra, H., Erizal, & Simatupang, M. (2026). Effect of Relative Density Variation on The Effectiveness of Fly Ash in Stabilization of Sandy Soils for Liquefaction Mitigation. ournal of the ivil ngineering orum, 12(3), 293-304. https://doi.org/10.22146/jcef.26551
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Vol. 12 No. 3 (September 2026)
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Articles

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