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Effects of ground granulated blast furnace slag (GGBS) on the strength and swelling properties of lime-stabilized kaolinite in the presence of sulphates

Published online by Cambridge University Press:  09 July 2018

S. Wild ,
J. M. Kinuthia ,
R. B. Robinson  and
I. Humphreys
S. Wild
Affiliation:
Department of Civil Engineering and Building, University of Glamorgan, Pontypridd, Mid Glamorgan, South Wales, CF37 1DL, UK
J. M. Kinuthia
Affiliation:
Department of Civil Engineering and Building, University of Glamorgan, Pontypridd, Mid Glamorgan, South Wales, CF37 1DL, UK
R. B. Robinson
Affiliation:
Department of Civil Engineering and Building, University of Glamorgan, Pontypridd, Mid Glamorgan, South Wales, CF37 1DL, UK
I. Humphreys
Affiliation:
Department of Civil Engineering and Building, University of Glamorgan, Pontypridd, Mid Glamorgan, South Wales, CF37 1DL, UK
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Abstract

The use of ground granulated blast furnace slag (ggbs) is well established in many cement applications where it provides enhanced durability, including high resistance to chloride penetration, resistance to sulphate attack and protection against alkali silica reaction (ASR). The use of ggbs in soil stabilization is, however, still a novel process in the UK although it has been used in South Africa. This paper reports on efforts to extend the use of ggbs to highway and other foundation layers by determining the beneficial effect which it has on the reduction of expansion due to the presence of sulphates. The paper describes the results of laboratory tests on lime-stabilized kaolinite containing different levels of added sulphate to which different amounts of ggbs have been added. The tests determine the strength development of compacted cylinders, moist cured in a humid environment at 30°C, and the linear expansion of these moist cured cylinders on soaking in water. The results illustrate that small additions of ggbs to sulphate containing clays which are stabilized with lime reduce substantially their expansion when exposed to water and have no significant deleterious effect on strength development.

Type
Research Article
Information
Clay Minerals , Volume 31 , Issue 3 , September 1996 , pp. 423 - 433
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1996

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