Effect of Fly Ash on Swell Behaviour of a Very Highly Plastic Clay

Date

2018-08-16

Author

Çokça, Erdal
Lav, Musaffa Ayşen

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Swelling of expansive soils causes excessive heave. Resulting expansion can lead to considerable distress to pavements and/or lightweight structures which are settled on that kind of subsoils. Several methods can be applied to control the swelling problem. One of the most commonly used method is the addition of stabilizing agents, such as lime or fly ash to the expansive soil. Soil samples that are very highly plastic have been taken from clay deposits of Ankara in Turkey in this study. Both disturbed and undisturbed specimens have been obtained in order to perform laboratory tests. Fly ash has been used as the chemical stabilizer. Firstly, reference tests have been carried out on natural soil samples. Then the clay is mixed with fly ash at different percentages of dry weight of the soil and the engineering properties of the stabilized soil samples have been determined. Index properties and swelling characteristics of the soil samples have been found. Results are evaluated and the changes in these properties especially with regard to swell potential, have been interpreted in this paper. Optimum values have been determined for swell potential. The correlations between the index properties, the swell percentage and the swell pressure are presented.

Subject Keywords

Expansive clay, Fly ash treatment, Swell potential

URI

https://hdl.handle.net/11511/39652

DOI

https://doi.org/10. 1007/978-3-3 19-97 1 12-4_1 8lj

Collections

Department of Civil Engineering, Conference / Seminar

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Stabilization of Expansive Clays Using Granulated Blast Furnace Slag (GBFS) and GBFS-Cement Çokça, Erdal; Ozaydin, Vehbi (2009-08-01) Expansive clays undergo swelling when subjected to water. This can cause damage, especially to light weight structures, water conveyance canals, lined reservoirs, highways, and airport runways unless appropriate measures are taken. In this study, granulated blast furnace slag (GBFS) and GBFScement (GBFSC) were utilized to overcome or to limit the expansion of an artificially prepared expansive soil sample (sample A). GBFS and GBFSC were added to sample A in proportions of 5-25% by weight. The effects of the...
Effect of fly ash on swell behaviour of a very highly plastic clay Süt-Ünver, I.; Lav, Musaffa Ayşen; Çokça, Erdal (2018-01-01) Swellingofexpansivesoilscausesexcessivelreave.Resultingexpansion can leacl to cıınsiclerable distress to pavements and/or lightweightstnıctures whrclr are settlecl on tbat kincl of subsoils. Several methtıds can [.ıeapplieil to control the swelling ploblem. one cıf the ınost ct)ınıı]onlv usedmethocl is the addition of stabilizing agents, such as lime or fly ash tr,ı theexpansivesoil.Soilsamplesthatareveryhighlyplastichırvebeentır]cenfi.oırrclayciepositsofAnkarainT..rkeyinthisstucly.Bothdisturbeclandunci-ist...
Prediction of swelling potential of Ankara soils by methylene blue test Çokça, Erdal (Scientific and Technical research Council of Turkey - TUBITAK/Turkiye Bilimsel ve Teknik Arastirma Kurumu, 1993-01-01) The swelling potential characteristics of Ankara soils by using different swelling potential classification methods developed by different researchers were investigated. The influence of the mineralogical composition of swelling potential of expansive clay soils and the use of Methylene Blue Test in order to predict their swelling potential were studied. A swelling potential classification method has been proposed by using clay content versus methylene blue value chart.
Effect of fly ash on swell pressure of an expansive soil Çokça, Erdal (1999-12-01) This paper discusses the effect of Fly ash on the engineering properties of expansive soils. As reviewed in literature, many previous investigations have shown promising results for improvement of expansive soil after stabilization with Fly ash. Laboratory tests have been conducted on expansive soils obtained from three different regions in Khartoum state. Various percentages of Fly ash such as 0%, 10%, 20%, 25%, and 30% by weight of soil were added to the three soils and their inf...
Use of Class C fly ashes for the stabilization of an expansive soil Çokça, Erdal (American Society of Civil Engineers (ASCE), 2001-07-01) Excessive heave associated with swelling of expansive soils can cause considerable distress to lightweight civil engineering structures. Several methods have been suggested to control this problem. The most commonly used method is addition of stabilizing agents, such as lime or cement to the expansive soil. In this study, high-calcium and low-calcium class C fly ashes from the Soma and Tuncbilek thermal power plants, respectively, in Turkey, were used for stabilization of an expansive soil. An evaluation of...

Citation Formats

E. Çokça and M. A. Lav, “Effect of Fly Ash on Swell Behaviour of a Very Highly Plastic Clay,” 2018, vol. 1, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/39652.