Effects of compaction moisture content on the shear strength of an unsaturated clay

Date

2004-05-12

Author

Çokça, Erdal
Armangil, F.

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

73
views

0
downloads

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 suction-moisture content relationship of the soil sample was obtained. The trends for suction, angle of friction and cohesion, which change below and above optimum moisture content, were analyzed. The compacted clay behaves like a granular soil on the dry side of optimum water content; and a reduction in angle of friction and an increase in cohesion are observed as the compaction water contents approach the optimum value. The angle of friction is not affected by soaking, but after soaking cohesion of the sample reduces.

Subject Keywords

Angle of friction , Unsaturated soil, Suction , Compacted clay, Cohesion

URI

https://hdl.handle.net/11511/57854

Journal

Geotechnical and Geological Engineering

DOI

https://doi.org/10.1023/b:gege.0000018349.40866.3e

Collections

Department of Civil Engineering, Article

Suggestions

OpenMETU
Core

Effect of different clay concentrations on crude oil combustion kinetics by thermogravimetry Kök, Mustafa Verşan (2010-03-01) The objective of this research was to investigate the effect of different clay composition and concentrations on the thermal behaviour and kinetics of heavy crude oil in limestone matrix by thermogravimetry (TG/DTG). In TG/DTG experiments, three distinct reaction regions were identified in all of the crude oil + limestone mixture known as low temperature oxidation (LTO), fuel deposition (FD) and high temperature oxidation (HTO) respectively. Addition of clay to porous matrix significantly affected the react...
Relationship between suction and shear strength parameters of compacted METU campus clay Tilgen, Hüseyin Pars; Çokça, Erdal; Department of Civil Engineering (2003) In this study, the relationship between soil suction and shear strength parameters of compacted METU campus clay were investigated at different moisture contents. Soil samples were tested at optimum moisture content (i.e. w=20.8%), at dry side of optimum moisture content (i.e. w=14.8%, 16.8%, 18.8%) and at wet side of optimum moisture content (i.e. w=22.8%, 24.8%, 26.8%). Direct shear tests were performed to measure shear strength parameters (c', F') and soil suctions were measured by filter paper method af...
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...
Effect of clay pretreatment on photofermentative hydrogen production from olive mill wastewater Eroglu, Ela; Eroglu, Inci; Gündüz, Ufuk; Yuecel, Meral (2008-10-01) The aim of this paper was to gain further insight into the effect of the clay pretreatment process oil photofermentative hydrogen production. This two-stage process involved a clay pretreatment step followed by photofermentation. which was performed under anaerobic conditions with the illumination by Tungsten lamps. Rhodobacter sphaeroUts O.U.001 was used for photofermentation. Higher amounts of color (65%), total phenol (81%) and chemical oxygen demand (3%) removal efficiencies were achieved after clay pre...
Effect of clay on crude oil combustion by thermal analysis techniques Kök, Mustafa Verşan (Springer Science and Business Media LLC, 2006-05-01) This research was aimed to investigate the role of clay on the combustion and kinetic behavior of crude oils in limestone matrix. For this purpose, simultaneous TG (thermogravimetry) and DTA (differential thermal analysis) experiments were performed at three different heating rates as 10-15 and 20 degrees C min(-1), respectively. A uniform trend of decreasing activation energies was observed with the addition of clay. It was concluded that clays surface area affects the values of Arrhenius constant, while i...

Citation Formats

E. Çokça and F. Armangil, “Effects of compaction moisture content on the shear strength of an unsaturated clay,” Geotechnical and Geological Engineering, pp. 285–297, 2004, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/57854.