IMPROVING SOME GEOTECHNICAL PROPERTIES OF AN ORGANIC SOIL USING CRUSHED WASTE CONCRETE

Yıl 2018, Cilt: 3 Sayı: 3, 101 - 112, 01.01.2019

Mohammed Thafer Ali Fırat Çabalar Muhamd Dafer Abdulnafaa

Öz

ABSTRACT. Many urban areas are now struggling with the high volume of solid wastes, especially the construction and demolition materials. In this study, the crushed waste concrete (CWC), which is considered one of the biggest components of solid waste, was used to improve some geotechnical properties of organic soil. The CWC at the ratios of 5%, 10%, 15%, and 20% were added to organic soil in order to conduct an intensive series of experimental tests. The laboratory tests included the consistency limits by fall cone, modified compaction, unconfined compressive strength (UCS), and swelling percentage. The results show that when the CWC percentages were increased to 50%, there were decreases of about 30% and 60% in liquid limit and plasticity index of clay, respectively. An increase of about 35% in γ_drymax for the organic soil was noticed when the CWC content was increased from 10% to 50%. A reduction of about 50% of w_opt for organic soil was shown by increasing the CWC percentage to 50%. The UCS values of the organic silt increase by around 25% by increasing the CWC percentage up to 50%. The swelling percentage increased by adding CWC up to 30%, and then decreased with the addition of CWC up to 50%.

Anahtar Kelimeler

soil stabilization, organic soil

Kaynakça

• [1] Coduto DP. Geotechnical Engineering Principles and Practices. 2nd ed. Upper Saddle River, NJ07458. Prentice Hall. 1999.
• [2] Hwang J et al. Stabilization and Improvement of Organic Soil. Final Report FHWA / IN / JTRP-2004 / 38, 2005
• [3] Edil TB. Construction over peats and organic soils. In Conference on Recent Advances in Soft Soil Engineering 1997 Mar, pp. 5-7.
• [4] Den Haan EJ. An overview of the mechanical behavior of peats and organic soils and some appropriate construction techniques. In Proc. of the Conf. on Recent Advances in Soft Soil Engineering 1997 Mar Vol. 1, pp. 17-45
• [5] Hashim R, Islam MS. Properties of stabilized peat by soil-cement column method. Electronic Journal of Geotechnical Engineering. 2008; 13:pp.1-9
• [6] Hampton MB, Edil TB. Strength gain of organic ground with cement-type binders. In Soil improvement for big digs 1998 (pp. 135-148). ASCE.
• [7] Janz M, Johansson SE. The function of different binding agents in deep stabilization. Swedish deep stabilization research centre, report. 2002; 9:1-35. [8] Ali, F. (2012). Stabilization of residual soils using liquid chemical. Electronic Journal of Geotechnical Engineering, 17(BUNDLE B), pp. 115-126.
• [9] Huat BB, Maail S, Mohamed TA. Effect of chemical admixtures on the engineering properties of tropical peat soils. American Journal of Applied Sciences. 2005; 2(7):pp.1113-20.
• [10] Kalantari B, Huat BB. Peat soil stabilization, using ordinary portland cement, polypropylene fibers, and air curing technique. Elect. J. Geotech. Eng., Bund. J. 2008:pp.1-3.
• [11] Kalantari B, Huat BK. Load-Bearing Capacity Improvement for Peat Soil. European journal of scientific research. 2009; 32(2):pp.252-9.
• [12] Kalantari B, Huat BB, Prasad A. Effect of polypropylene fibers on the California Bearing Ratio of air cured stabilized tropical peat soil. Am. J. Engg. & Applied Sci. 2010; 3(1):pp.1-6.
• [13] Kazemian S, Huat BB, Prasad A, Barghchi M. Effect of peat media on stabilization of peat by traditional binders. International Journal of Physical Sciences. 2011 Feb 4; 6(3):pp.476-81.
• [14] Tastan EO, Edil TB, Benson CH, Aydilek AH. Stabilization of organic soils with fly ash. Journal of geotechnical and Geoenvironmental Engineering. 2011 Jan 8; 137(9):pp.819-33.
• [15] Sing WL, Hashim R, Ali F. Unconfined compressive strength characteristics of stabilized peat. Scientific Research and Essays. 2011 May 31; 6(9):pp.1915-21.
• [16] Kolay PK, Aminur MR, Taib SN, Zain MM. Stabilization of tropical peat soil from Sarawak with different stabilizing agents. Geotechnical and geological engineering. 2011 Nov 1; 29(6):p.1135. [17] Kolay PK, Sii HY, Taib SN. Tropical peat soil stabilization using class F pond ash from coal fired power plant. International Journal of Civil and Environmental Engineering. 2011; 3(2):pp.79-83. [18] ASTM D. 2166 (2000) Standard test method for unconfined compressive strength of cohesive soil. Annual book of ASTM Standards, American Society for Testing and Materials, Philadelphia. 2003;4(08).
• [19] BS 1377. Part 1–4., “Soils for civil engineering purposes,” British Standards Institution. London, UK, 1990.
• [20] ASTM. American Society for Testing and Materials. (2014). Standard Test Methods for Specific Gravity of Soil Solids by Water Pycnometer, D854-2014 West Conshohocken, PA.
• [21] ASTM. American Society for Testing and Materials. (2010). Standard test methods for liquid limit, plastic limit, and plasticity index of soils. D4318-2010 West Conshohocken, PA.
• [22] ASTM. American Society for Testing and Materials. (2007). Standard Test Method for Particle-Size Analysis of Soils, D422-2007 West Conshohocken, PA.
• [23] ASTM American Society for Testing and Materials. (2014). Standard Test Methods for Moisture, Ash, and Organic Matter of Peat and Other Organic Soils, D1997-2014 West Conshohocken, PA.
• [24] ASTM. American Society for Testing and Materials. (2014). Standard Test Methods for Moisture, Ash, and Organic Matter of Peat and Other Organic Soils, D2974-2014 West Conshohocken, PA.
• [25] ASTM. American Society for Testing and Materials. D2976. (2013). Standard Test Method for pH of Peat Materials, D2976-2013 West Conshohocken, PA.
• [26] ASTM. American Society for Testing and Materials. (2014). Standard Test Method for Estimating the Degree of Humification of Peat and Other Organic Soils (Visual/Manual Method), D5715-2014 West Conshohocken, PA.
• [27] ASTM. American Society for Testing and Materials. (2012). Standard test methods for laboratory compaction characteristics of soil using modified effort. D1557-2012West Conshohocken, PA.
• [28] Hansbo S. A new approach to the determination of the shear strength of clay by the fall-cone test. Royal Swedish Geotechnical Institute; 1957.[29] Wood DM. Some fall cone tests. Geotechnique. 1985 Mar; 35(1).