The role of ettringite in the deterioration of artificial lime stabilised soils: a microstructural study
TLDR
In this article, the authors report the dimensional and strength changes of a range of artificial lime stabilised cohesive soils subject to two swell test procedures: the UK linear California Bearing Ratio swell test (BS1924-2) and the European accelerated swell test(EN13286-49).Abstract:
The formation of ettringite has been defined as a major failure mechanism of lime stabilised cohesive soils. It can result in both disruptive volumetric changes and loss of mechanical strength. The mechanisms of its formation and the role it plays in deleterious processes are complex. This paper reports the dimensional and strength changes of a range of artificial lime stabilised cohesive soils subject to two swell test procedures: the UK linear California Bearing Ratio swell test (BS1924-2) and the European accelerated swell test (EN13286-49). The resulting microstructural composition was analysed using a combination of scanning electron microscopy and electron dispersive X-ray spectroscopy. The results are explained in terms of established theories of crystal formation and subsequent expansion mechanisms.read more
Citations
More filters
Journal ArticleDOI
Calcium-free geopolymer as a stabilizer for sulfate-rich soils
TL;DR: In this article, metakaolin based geopolymer (MKG) was used to stabilize a synthetic lean clay premixed with 1000, 5000 and 10,000 pm gypsum (equivalent to the sulfate concentration of 565, 2825 and 5650 pm, respectively).
Journal ArticleDOI
Role of crystalline silica admixture in mitigating ettringite-induced heave in lime-treated sulfate-rich soils
TL;DR: In this paper, the applicability of using crystalline silica-rich material as a co-additive with calcium-based stabilisers to treat sulfate-rich expansive s...
Journal ArticleDOI
Role of crystalline silica admixture in mitigating ettringite-induced heave in lime-treated sulfate-rich soils
TL;DR: In this article , the applicability of using crystalline silica-rich material as a co-additive with calcium-based stabilisers to treat sulfate-rich expansive soils was evaluated.
Experimental study on mechanical properties and microstructure of metakaolin based geopolymer stabilized silty clay
Journal ArticleDOI
Effects of freeze-thaw cycles on the characteristics of the expansive soils treated by nanosilica and Electric Arc Furnace (EAF) slag
TL;DR: In this paper, the impacts of nanosilica and the electric arc furnace (EAF) slag on the improvement of the swelling potential, volume changes, and unconfined compressive strength of the expansive clay samples were experimentally investigated.
References
More filters
Journal ArticleDOI
Lime stabilization of clay minerals and soils
TL;DR: In this paper, three of the most frequently occurring minerals in clay deposits, namely, kaolinite, montmorillonite and quartz, were subjected to a series of tests.
Journal ArticleDOI
Mechanism of expansion associated with ettringite formation
TL;DR: In this paper, it is shown that in the presence of lime the nature of ettringite formed is colloidal, and not long lath-like crystals, which can attract a large number of water molecules which cause interparticle repulsion, thus causing an overall expansion of the system.
Journal ArticleDOI
Lime-Induced Heave in Sulfate-Bearing Clay Soils
TL;DR: In this article, the authors found abundant thaumasite, a complex calcium-silicate-hydroxide-sulfate-carbonate-hyd rate mineral, forming a solid solution series with ettringite.
Journal Article
A quick test to determine lime requirements for lime stabilization
James L Eades,Ralph E Grim +1 more
TL;DR: In this paper, the authors describe the reaction of LIME and soil to changes in the PLASTICITY, SWELL, SHRINKAGE or COMPRESSIVE STRENGTH of the soil.
Journal ArticleDOI
Practical problems from surprising soil behavior
TL;DR: In this paper, the aging of quick clay after sampling, the remolded strength increases in samples maintained at constant water content, time effects in freshly densified or deposited sand, in which natural sand deposits can lose strength if disturbed but regain strength over time periods of weeks to months, and apparently sound lime-stabilized soil that swells and disintegrates starting a few years after construction.