Effect of fly ash on swell pressure of an expansive soil

Date

1999-12-01

Author

Çokça, Erdal

Metadata

Show full item record

Item Usage Stats

307
views

0
downloads

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 influence on the soil plasticity, swell characteristics and unconfined compression strength are discussed. Additions of Fly ash to the three soils resulted in significant improvement in the strength and reduction in plasticity and swell properties of soils. The unconfined compression strength of soils treated with 10% Fly ash showed almost 2 times improvement compared with untreated soils. For the addition of 10% fly ash, the reduction in free swell, swell pressure and swell potential is in the range 50% to 70%. Further addition of fly ash caused a reduction in the swell characteristics of 90% at 25% fly ash. Hence, it is concluded that the fly ash has a good potential to be used as a additive for improving the engineering properties of expansive soil

Subject Keywords

Stabilization, Improvement, Expansive soil, Fly ash

URI

https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=2442712660&origin=inward
https://hdl.handle.net/11511/80768

Journal

Electronic Journal of Geotechnical Engineering

Collections

Department of Civil Engineering, Article

Suggestions

OpenMETU
Core

Influence of fly ash composition on non-gray particle radiation in combusting systems Ates, CİHAN; Selçuk, Nevin; Külah, Görkem (2018-08-01) In this study, chemical composition dependency of both radiative properties of ash particles and radiative heat exchange are investigated for conditions typically encountered in industrial coal-fired furnaces. For that purpose, chemical composition dependent / independent complex index of refraction models are utilized to evaluate (i) spectral particle absorption efficiencies, scattering efficiencies and asymmetry factors, (ii) particle cloud properties representing pulverized coal fired furnaces (PC-Fired)...
Effects of compaction moisture content on the shear strength of an unsaturated clay Çokça, Erdal; Armangil, F. (2004-05-12) This paper deals with the results of an experimental study carried out on compacted clay (PL=23%) to investigate the influence of compaction water content on the shear strength of the clay. For the measurement of shear strength parameters, direct shear tests were done on samples compacted at optimum moisture content (i.e. w=24%), at the dry side of optimum (i.e. w=18%, 20% and 22%) and at the wet side of optimum (i.e. w=26% and 28%). Thermocouple psychrometers were used for suction measurements and the suct...
Effects of the rock mass parameters on the dragline excavation performance Demirel, Nuray (2011-07-01) This paper investigates impacts of rock mass properties on dragline performance. Performances of two draglines operated in different rock formations in Tuncbilek Coal mines were analyzed using modified geological strengths index (GSI). Results showed that draglines' performance change with the rock mass properties. Based on the available data, an empirical relationship was generated to estimate dragline production capacity. The estimated excavation amount by the proposed model was found to be consistent wit...
Effect of limestone addition on radiative heat transfer during co-firing of high-sulfur content lignite with biomass in fluidized bed combustors Ates, CİHAN; Selçuk, Nevin; Külah, Görkem (2018-01-01) In this study, influence of limestone addition on radiative heat transfer during co-firing of high-sulfur content lignite with olive residue in the freeboard of 300 kW(t) Atmospheric Bubbling Fluidized Bed Combustor (ABFBC) is investigated by using an in-house developed radiation code based on Method of Lines (MOL) solution of Discrete Ordinates Method (DOM). The freeboard is treated as a 3D rectangular enclosure containing gray, absorbing, emitting gas with absorbing, emitting, anisotropically scattering p...
Effects of mix composition and water-cement ratio on the sulfate resistance of blended cements Sahmaran, M.; Kasap, O.; Duru, K.; Yaman, İsmail Özgür (2007-03-01) This paper presents an experimental investigation on the sulfate resistance of blended cements containing various amounts of natural pozzolan and/or Class-F fly ash. The performance of blended cements was monitored by exposing the prepared mortar specimens to a 5% Na2SO4 Solution for 78 weeks. For comparison, an ordinary Portland cement (produced with the same clinker as blended cements) and it sulfate resistant Portland cement (produced from a different clinker) were also used. In addition to the cement ch...

Citation Formats

E. Çokça, “Effect of fly ash on swell pressure of an expansive soil,” Electronic Journal of Geotechnical Engineering, pp. 0–0, 1999, Accessed: 00, 2021. [Online]. Available: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=2442712660&origin=inward.