Compression Behavior of Fibrous Peat Stabilized with Admixtures of Lime CaCO3+Rice Husk Ash and Lime CaCO3+Fly Ash

Noor Endah Mochtar, Faisal Estu Yulianto

Abstract


Compression behavior of stabilized fibrous peat has similar behavior with the initial one.  Therefore, one step loading consolidation test is still applicable for the stabilized fibrous peat to predict its compression. The stabilized fibrous peat behavior, however, still depends on the type of the admixture used and stabilization age or curing period. Based on that reason, this study was carried out to study the change of compression behavior of the stabilized peat and to know whether the correction curves developed for laboratory compression parameters are still applicable to predict the settlement of the stabilized peat in the field. For this purpose, two types of stabilizing material adopted, admixtures lime CaCO3+Rice Husk Ash (admix-1) and lime CaCO3+Fly Ash (admix-2). The stabilized peats were cured and tested at different curing periods 20, 30, 45, 60 and 90 days to check their behavior changes. Besides, laboratory models of peat stabilized at different layer thicknesses 1/3H, 2/3H, and H (H=peat sample thickness) were carried out to monitor their settlement under 50kPa load at different curing periods. This settlement is then compared with the predicted settlement. The results show that the fibrous peat stabilized with admixture-2 gives better behavior improvement than the one stabilized with admix-1; it is, however, then slightly decreases after 60 days of curing periods due to the fiber decomposition. Peat stabilized with admix-2 also give first settlement prediction when it is compared to the settlement of stabilized peat in the laboratory model.

Keywords


admixture; compression; fibrous peat; fly ash; laboratory model; lime CaCO3; rice husk ash; stabilization

Full Text:

PDF

References


MacFarlane, I.C. (1959). â€Muskeg Engineering Handbookâ€. National Research Council of Canada, University of Toronto Press, Toronto, Canada.

MacFarlane, I.C. dan Radforth, N.W. (1965). â€A Study of Physical Behaviour of Peat Derivatives Under Compression. Proceeding of The Tenth Muskeg Research Conference. National Research Council of Canada, Technical Memorandum No 85.

Mochtar, Noor E. dan Mochtar, Indrasurya B. (1991). Studi Tentang Sifat Phisik dan Sifat Teknis Tanah Gambut Banjarmasin dan Palangkaraya Serta Alternatif Cara Penanganannya untuk Konstruksi Jalan. Dipublikasi sebagai hasil penelitian BBI dengan dana dari DIKTI Jakarta.

Mochtar, Noor E. dan Eding I. Imananto (2000). “Pengaruh Rasio Penambahan Beban Terhadap Perilaku Pemampatan Tanah Gambut Berserat Asal Riau dan Usulan Metode Hardin untuk Prakiraan Pemampatannyaâ€. Majalah IPTEK ITS Vol 11no 2, Mei.

Terzaghi, K. (1925), Principles of Soil Mechanics. Engr. News Record, Vol. 95, pp. 832-836.

Edil, T.B., and Dhowian, A,W.(1979). Analysis of Long-Term Compression of Peats. Geotechnical Engineering, Southeast Asian Society of Soil Engineering, Vol. 10, pp159-178

Gibson,R.E., and Lo, K.Y. (1961). A Theory of Consolidation of Soil Exhibiting Secondary Compression. Acta Polytechnica Scandinavica.

Edil,T.B. and N.E.Mochtar (1984). Prediction of Peat Settlement. Proceeding of a Symposium: Sedimentation Consolidation Models. ASCE. San Francisco, USA.

Mochtar, N.E. and Marzuki, A. (2010). Method to Predict Compression Behavior of Tropical Fibrous Peat in The Field. The International Symposium on Lowland Technology (ISLT). Saga, Japan.

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.

[

Yulianto, F.E., and Mochtar, N.E. (2012). The behavior of Fibrous Peat Soil Stabilized with Rice Husk Ash (RHA) and Lime. Proceedings of 8th International Symposium on Lowland Technology. September 11-13, 2012, Bali, Indonesia.

Harwadi, F. and Mochtar, N.E. (2010), “Compression Behavior of Peat Soil Stabilized with Environmentally Friendly Stabilizer. Proceedings of the First Makassar International Conference on Civil Engineering (MICCE2010), March 9-10, 2010.

Day, J.H., Rennie, W., Stanek, G.P., and Raymond (Editorial Committee) (1979). Peat Testing Manual. Sponsored by: Muskeg Subcommittee. Technical Memorandum No 125.

ASTM Annual Book (1992) Reapproved 1996. Standard Classification of Peat Samples by Laboratory Testing (D4427-92). ASTM, Section 4, Volume 04.08 Soil and Rock, Philadelphia.

Mochtar, Noor E., Mustain A., and Trihanyndio R. (2009). Pemakaian Campuran Bahan Pozolan dan Kapur sebagai Bahan Stabilisasi Tanah Gambut yang Ramah Lingkungan untuk Konstruksi Jalan. Hasil Penelitian Strategis Nasional dengan Dana dari DIKTI Jakarta.

Huttunen, E., and Kujala, K. (1996), On the stabilization of organic soils. Proceedings of the 2nd International Conference on Ground Improvement Geosystem, Tokyo 96. Vol. 1, pp.411-414.

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.

Mullin, J. W. (1982), Crystallization, Butterworths, London.

Toyukara, Ken et all (1982), Crystallization, Volume I & II , JACE Design Manual Series, Tokyo.

Mochtar, N.E., Yulianto, N.E., Satria, T.R., (2014). Pengaruh Usia Stabilisasi Pada Tanah Gambut Berserat yang Distabilisasi dengan Campuran CaCO3 dan Pozolan. Jurnal Teknik Sipil Institut Teknologi Bandung, Vol.21, No. 1, April.

Yulianto, F.E., Ma’ruf, A.M., Mochtar, N.E. (2014). Pengaruh filtrasi Air pada Tanah Gambut yang Distabilisasi dengan Campuran Kapur+Abu Sekam Padi. Prosiding Konsferensi Teknik Sipil_8 (KONTEKS_8), 16-18 Oktober, Bandung.

Ingles, O.G. and Metcalf, J.B (1979). Soil Stabilization (Principles and Practice), Butterworths, Sydney, Australia.




DOI: http://dx.doi.org/10.18517/ijaseit.8.3.4317

Refbacks

  • There are currently no refbacks.


Published by INSIGHT - Indonesian Society for Knowledge and Human Development