This is an open access article distributed under the CC BY 4.0
Volume 20 article 929 pages: 276-284
Peat is a type of soil with high organic content, very low bearing capacity, and high uneven settlement. Some methods to improve soil have been applied to peat in order to make it strong enough for civilization-building foundation situated on it. Peat stabilization is a method that is continuously developed considering that the cost it needs is lower and this approach is more environmentally friendly compared to other methods. The admixture of lime (CaCO3) and Rice husk ash, a new ecofriendly stabilizer material, has been applied to peat soil and showed a good result. However, in studies conducted previously, the effect of water infiltration from surrounding areas of soil was stabilized was not involved as variable influencing the change of parameter. Based on that, this laboratory study was carried out to model the real condition in the field when the stabilization is performed and to identify the physical and engineering changes of peat soil in the 10th, 20th, and 30th days of stabilization in its border and middle parts, with the percentage of material stabilizer 5%, 10%, 15% and 20% of the unit weight of the initial condition of peat. The result of laboratory test shows that the addition of admixture of lime (CaCO3) and rice husk ash can improve the physical and engineering properties of peat soil are stabilized. Water infiltration occurred on peat soil is stabilized has not affected the physical and engineering properties of the soil. It can be seen from the physical and engineering properties of the border and central parts of peat soil is stabilized that still have a similar value. It is assumed to be caused by CaSiO3 gel formed still needs a longer duration to become stable gel. However, in this initial study it was known that the more stabilizers added, made the better the parameters of the stabilized peat soil.
1. Transportation Infrastructure Research and Development Center (2001), Geotechnical Guide 1st (Pusat Litbang Prasarana Transportasi, 2001), Panduan Geoteknik 1), WSP Internasional.
2. Jelisic, N., Leppänen, M., (2001), Mass Stabilization of Peat in Road and Railway construction, ISRM International Symposium, Melbourne, Australia, ISRM-IS-2000-352, November 2000.
3. Harwadi, F. and Mochtar, N.E. (2010), Compression Behavior of Peat Soil Stabilized with Enviromentally Friendly Stabilizer, Proceedings of the First Makassar International Conference on Civil Engineering (MICCE2010), March 9-10, 2010), ISBN 978-602-95227-0-9.
4. Kolay, P.K., Sii, H. and Taib, S.N.L. (2011), Tropical Peat Soil Stabilization using Class F Pond Ash from Coal Fired Power Plant, International Journal of Civil and Environmental Engineering Vol. 3 No.2.
5. Kusumawardani, M & Mochtar, N.E. (2012), Experiment on Fibrous Peat Subjected to Reduction of Water Content, Proceeding of 8th International Symposium on Lowland Technology, September 11-13, ISBN 978-602-95227-1-6.
6. Yulianto, F.E., Mochtar, N.E., Febrianti, M (2015), Parameters Change of Fibrous Peat Stabilized with [Ca(OH)2+Fly Ash] and [CaCO3+Fly Ash], Journal of Academic Research Internasional, Volume: 15, No. 3, ISSN: 0973-4562.
7. Yulianto, F.E. and Mochar. N.E. (2016). The Effect of Curing Period and Thickness of The Stabilized Peat Layer to The Bearing Capacity and Compression Behavior of Fibrous Peat. ARPN Journal of Engineering and Applied Sciences, Vol. 11, No. 19, October 2016. Page: 2150-2153.
8. Mochar. N.E. and Yulianto, F.E. (2017), Behavior Change in Peat Stabilized with Fly Ash and Lime CaCO3 Due to Water Iniltration, ARPN Journal of Engineering and Applied Sciences, Vol. 12, No. 17, October 2017. Page: 4967-4972.
9. S.N.M. Razali, A.Zainorabidin, I. Bakar, and H.M. Mohamad., (2018), Strength Changes in Peat – Polymer Stabilization Process; An Introduction of New Material for Peat Condition, International Journal of Integrated Engineering, Vo. 10, No.9.
10. Mochtar, NE, Yulianto, FE., Satria, TR., (2014), Pengaruh Usia Stabilisasi pada Tanah Gambut Berserat yang Distabilisasi dengan Campuran CaCO3 dan Pozolan, Jurnal Teknik Sipil ITB (Civil Engineering Journal ITB), Vol. 21, No. 1, Hal 57-64.
11. Prasad, Ram; Pandey Monika (20212), Rice Husk Ash as a Renewable Source for the Production of Value Added Silica Gel and its Application: An Overview, Bulletin of Chemical Reaction Engineering & Catalysis, 7 (1), DOI: https://doi.org/10.9767/bcrec.7.1.1216.1-25.
12. Yulianto, F.E. and Mochtar, N.E. (2010), Mixing of Rice Husk Ash (RHA) and Lime For Peat Stabilization, Proceedings of the First Makassar International Conference on Civil Engineering (MICCE2010), March 9-10, 2010.
13. Hikmatullah and Sukarman (2014), Physical and Chemical Properties of Cultivated Peat Soils in Four Trial Sites of ICCTF in Kalimantan and Sumatra, Indonesia, Journal of Tropical Soils, Vol. 19, No.3, 2014: 131-141, DOI : 10.5400/jts.2014.19.3.131
14. Aazokhi Waruwu, Hary Christady Hardiyatmo, and Ahmad Rifa’I (2016), “Compressive Behavior of Bagansiapiapi-Riau Peat in Indonesia” Electronic Journal of Geotechnical Engineering, 2016 (21.16), pp 5217-5227
15. Mochtar, NE. et al. (1998), Koefesien Tekanan Tanah ke Samping At Rest (Ko) Tanah Gambut Berserat serta Pengaruh Overconsolidation Ratio (OCR) Terhadap Harga Ko, Jurnal Teknik Sipil, ITB, Vol. 5 N0. 4.
16. Mochtar, NE. et al. (1999), Aplikasi Model Gibson & Lo untuk Tanah Gambut Berserat di Indonesia, Jurnal Teknik Sipil, ITB, Vol. 6 N0. 1.
17. Adnan Zainorabidin, Mohamad Niizar Abdurahman, Azman Kassim, Mohd Firdaus Md Dan Azlan, Siti Nooraiin Razali, and Engku Shahrulerizal Engku Ab Rahman, (2019), Settlement Behaviour Of Parit Nipah Peat Under Static Embankment, International Journal of GEOMATE, Aug, 2019, Vol.17, Issue 60, pp.151-155
18. Dhowian, A,W and T.B. Edil (1980), Consolidation Behaviour of Peat, Geotechnical Testing Journal, Vol.3. No. 3. pp 105-144.
19. G. Mesri, and M. Ajlouni (2007), Engineering Properties of Fibrous Peats, Journal of Geotechnical and Geoenvironmental Engineering, Vol. 133, No. 7, July 1, 2007. ©ASCE, ISSN 1090-0241/ 2007/7-850–866
20. Day, J.H., Rennie, P. J., et.all., (1979), Peat Testing Manual, National Research Council of Canada, Associate Committee on Geotechnical Research, Technical Memorandum N0. 125
21. Yulianto, FE., Mochtar, NE., (2018)’ Compression of Fibrous Peat Stabilized with Admixtures of Lime CaCO3 Rice Hsuk Ash and Lime CaCO3 Fly Ash, International Journal on Advanced Science Engineering Informatio Technology, Vol. 8, No. 3.
22. Huttunen, E., and Kujala, K. (1996), On the stabilization of organic soils, In Proceedings of the 2nd International Conference on Ground Improvement Geosystem, IS-Tokyo 96. Vol. 1, pp. 411-414.
23. Yulianto, F.E., and Widodo, B (2019)., Modelling of Crystal Growth in Peat Soil Stabilized with Mixing of Lime CaCO3 and Fly Ash, International Journal of Civil Engineering and Technology, Volume 10, Issue 03, March 2019, pp. 349-360, ISSN Print: 0976-6308 and ISSN Online: 0976-631.