Inspecting the Effects of Organic Content on Compaction and Consolidation Characteristics of Organic Soil Models

Abdulaziz Al-Kifae, Muhannad Abdullah Hamad

Abstract


The main objective of this study is to investigate the behavior of different organic soils percentages under consolidation and compaction. For this purpose, a model of organic soil samples made by the use of leaves of the Eucalyptus tree as an organic matter and then mixed with inorganic silty clay soil taken from a specific district in Baghdad city at three levels (0% as mineral soil, 20% as organic soil, and 40% as highly organic soil or peat by dry weight). The reason of make such models was that because there is no natural organic soils in Iraq with the needed percentages. The physical and the engineering properties of the mixtures where determined by conducting a series of laboratory tests including Atterberg limits, compaction, and consolidation tests. The chemical properties of the mixture where determined by the chemical composition and the pH tests. The results showed that the Atterberg limits (liquid limit L.L. and plastic limit P.L.) are increased with the increase of the organic content (O.C.), while the plasticity index (P.I.) is decreased at (20%, O.C.) then increased slightly at (40%, O.C.). The maximum dry density (M.D.D.) decreased with the increase of the organic content, while the optimum water content (O.W.C.) increased with the increase of the organic content and this concerned with compaction characteristics. Compressibility characteristics showed that the increase in the organic content made a clear increase in the whole compressibility parameters (compression index Cc, coefficient of consolidation Cv, and secondary compression index Cα).    


Keywords


organic matter; Atterberg's limits; compaction characteristics; consolidation.

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References


Abdallah, I. Husein Malkawi, S. Alawneh Ahmed, and T. Abu-Safaqah Osama, 1999, “Effects of Organic Matter on the Physical and the Physicochemical Properties of an Illitic Soil,” Applied Clay Science, Vol. 14, pp.257-278.

Pao-Tsung Huang, Mital Patel, Maria Caterina Santagata, Antonio Bobet, 2009, "Classification of Organic Soil," Final Report, School of Civil Engineering, Purdue University.

Edil, T. B. (1997) “Construction Over Peats and Organic Soil,” Proc. Conf. on Recent Advances in Soft Soil Engineering, Kuching. Referred by Abedin, 2006.

Odell, R. T., Thornburn, T. H., and Mckenzie, L. J. (1960) “Relationships of Atterberg Limits to Some other Properties of Illinois Soils,” Proceedings of Soil Science Society of America, 24, 287-300.

Holtz, R.D., Krizek, R.J., 1970. Properties of slightly organic top soils. Journal of the Construction Division, ASCE 96, 29–43, No. CO1.

Schmidt, N.O., 1965. A Study of the Isolation of Organic Matter as a Variable Affecting Engineering Properties of Soil, Thesis presented to the University of Illinois at Urbana, IL, in 1965 in partial fulfilment of the requirements for the degree of Doctor of Philosophy.

Duraisamy, Y.Bujang B.K and Aziz (2007) "Compressibility Behavior of tropical Peat Reinforced with Cement Columns," University Putra Malaysia, Serdang Selangor. Malaya, American Journal of Applied Sciences, 4(10) pp.786- 791.

Tahia Rabbee, and Islam M. Rafizul, (2012), "Strength and Compressibility Characteristics of Reconstituted Organic Soil at Khulna Region of Bangladesh" International Journal of Engineering and Technology Volume 2 No. 10, October, 2012

ASTM D 421-00. "Standard Test Method for Particle Size Analysis of Soil". Annual Book of ASTM Standards Vol. 04.08

ASTM D 4318-00. "Standard Test Method for Liquid Limit, Plastic Limit, and Plasticity Index of Soil". Annual Book of ASTM Standards Vol. 04.08

ASTM D 854-00. "Standard Test Method for Specific Gravity of Soil". Annual Book of ASTM Standards Vol. 04.08

ASTM D 698-00. "Standard Test Methods for Laboratory Compaction Characteristics". Annual Book of ASTM Standards Vol. 04.08

ASTM D 2166-00. "Standard Test Method for Unconfined Compressive Strength of Cohesive Soil". Annual Book of ASTM Standards Vol. 04.08

ASTM D 2975-00. "Moisture, Ash, and Organic matter of Peat and Other Organic soils". Annual Book of ASTM Standards Vol. 04.08

ASTM D 2435-96. "Standard Test Method for One-Dimensional Consolidation Properties of Soil" Annual Book of ASTM Standards Vol. 04.08

Franklin, A.G., Orozoco, L.F., And Semrav, R., 1973, "Compaction and Strength of Slightly Organic Soils," Journal of Soil Mechanics and Foundation Division, ASCE, Vol.99, No.SM7, Proc. Paper 9873, PP.541-557, July.

Abbas, A., Majeed, A.H. and Hassan, I.M., 1985, "Compaction and Strength of Slightly Organic Soil," Journal of Building Research Center, Vol.4, No.1, Iraq, PP. 1-19, May.

Brady, N.C., 1984, "The Nature and Properties of Soils," Ninth edition, Macmillan Publishing Company.


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