Unconfined compressive strength characteristics of stabilized peat

Wong, L.S. and Hashim, Roslan and Ali, F. (2011) Unconfined compressive strength characteristics of stabilized peat. Scientific Research and Essays, 6 (9). pp. 1915-1921. ISSN 19922248,

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Deep stabilized peat columns could be considered as attractive and economical foundation for construction of highway embankments on deep peat ground. However, peat itself is very problematic and failure in the formation of the columns with adequate strength was often attributed to unsuitable type and insufficient dosage of binder added to the organic soil. Organic matter in peat was known to impede the cementing process in the soil, thus, retarding the early strength gain of stabilized peat. To evaluate the strength characteristics of stabilized peat, laboratory investigation on early strength gain of the stabilized soil was conducted to formulate a suitable and economical mix design that can be effectively used for the soil stabilization. To achieve such purpose, the study examined the effect of binder, sodium chloride as cement accelerator and silica sand as filler on the unconfined compressive strength of stabilized peat after 7 days of curing in water. Binders used to stabilize the peat were Ordinary Portland cement, ground granulated blast furnace slag, sodium bentonite, kaolinite, lime and bentonite. All the stabilized peat specimens were tested using unconfined compression apparatus. The test results revealed that the stabilized peat specimen (80 OPC: 10 GGBS: 10 SB) with addition of 4 sodium chloride by weight of binder and 50 well graded silica sand by volume of wet peat at 300 kg m -3 binder dosage yielded the highest unconfined compressive strength of 196 kPa. This implied that, the higher the dosage of silica sand in stabilized peat, the more solid particles will be available for the binder to unite and form a load sustainable stabilized peat. It could be summarized that, as the rate of hydration process of stabilized peat was accelerated by inclusion of sodium chloride, the solid particles contributed to the hardening of stabilized peat by providing the cementation bonds to form between contact points of the particles.

Item Type: Article
Additional Information: Cited By (since 1996):1 Export Date: 16 December 2013 Source: Scopus Language of Original Document: English Correspondence Address: Wong, L. S.; Department of Civil Engineering, College of Engineering, Universiti Tenaga Nasional, Km 7, Jalan Kajang-Puchong, Kajang, Selangor 43009, Malaysia; email: wongls79@gmail.com References: Axelsson, K., Johansson, S.E., Andersson, R., (2002) Stabilization of organic soils by cement and puzzolanic reactions: Feasibility study, , www.swedgeo.se/sd/pdf/SD-R3E.pdf, Linkoping (Sweden): 3rd Report of Swedish Deep Stabilization Research Centre. URL; Chen, H., Wang, Q., The behaviour of soft soil stabilization using cement (2006) Bull. Eng. Geol. Environ., 65, pp. 445-448; Hartlen, J., Wolski, W., (1996) Embankments on organic soils, p. 6. , 1st edn. Elsevier Science B.V., Amsterdam, Holland. ISBN: 0-444-88273-1; Head, K.H., Manual of Soil Laboratory Testing (1994) Permeability, Shear Strength and Compressibility Tests, 2, p. 582. , 2nd edn., Pentech Press Limited, London, UK, ISBN: 0-7273 1319-3; Ismail, M.A., Joer, H.A., Randolph, M.F., Meritt, A., Cementation of porous materials using calcite (2002) Geotechnique, 52, pp. 313-324; Janz, M., Johansson, S.E., The function of different binding agents in deep stabilization (2002) 9th Report of Swedish Deep Stabilization Research Centre, , www.swedgeo.se/Sd/pdf/SD-R9E.pdf, Linkoping (Sweden), URL; Karlsson, R., Hansbo, S., (1981) Soil classification and identification, , 1st edn. Stockholm: Swedish Council for Building Research; Kezdi, A., (1979) Stabilized Earth Roads, p. 110. , 1st edn., Akademiai Kiado, Budapest, Hungary. ISBN: 0-444-99786-5; Landva, A.O., Pheeney, P.E., Peat fabric and structure (1980) Geotechnique, 17, pp. 416-435; Terzaghi, K., Peck, R.B., Mesri, G., (1996) Soil Mechanics in Engineering Practice, p. 127. , www.ejge.com/2008/Ppr0862/Ppr0862.pdf, 3rd edn. John Wiley and Sons, New York, USA. ISBN: 978-0-471-08658-1, URL; Wong, L.S., (2010) Stabilization of chemical binders and silica sand, , Ph. D dissertation, University of Malaya, Kuala Lumpur, Malaysia; Wong, L.S., Hashim, R., Ali, F., Compression rates of untreated and stabilized peat soils (2008) Elect. J. Geotech. Eng., 13, pp. 1-13; Wong, L.S., Hashim, R., Ali, F., Influence of curing under stress on the engineering properties of stabilized peat soil (2008) Proceedings of the International Conference on Construction and Building Technology, pp. 159-179. , June 16-20, Grand Seasons Hotel, Kuala Lumpur, Malaysia; Xing, H., Yang, X., Xu, C., Ye, G., Strength characteristics and mechanisms of salt-rich soil-cement (2009) Eng. Geol., 103, pp. 33-38
Uncontrolled Keywords: Binder, Organic matter, Silica sand, Sodium chloride, Unconfined compressive strength
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Faculty of Engineering
Depositing User: Mr Jenal S
Date Deposited: 18 Feb 2014 01:31
Last Modified: 31 May 2019 05:06
URI: http://eprints.um.edu.my/id/eprint/8862

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