Journal ArticleDOI
Effect of compaction time delay on compaction and strength behavior of lime-treated expansive soil contacted with sulfate
TLDR
In this article, the effect of sodium sulfate solution on compaction and strength behavior of lime-treated expansive soil is brought out in this paper, where the experimental study showed that the maximum dry unit weight decreased and optimum moisture content increased with increase in concentration of sulfate solutions when compacted without any compaction delay.Abstract:
Application of lime as an additive for controlling the volume change behavior and improving the strength of expansive soils has been in use over several decades. However, the contamination of lime-treated expansive soil with sulfate always results in the deterioration of treated expansive soil. Therefore, this paper highlights the effect of sodium sulfate solution on compaction and strength behavior of lime-treated expansive soil. Further, the effect of compaction time delay and contact period of sulfate solution with lime-treated soil is also brought out in this paper. To bring out the above effects, the lime contents corresponding to the initial consumption of lime (ICL) and ICL ± 1% were used along with sulfate solutions of 5000, 10,000 and 20,000 ppm. The experimental study showed that upon mixing the lime-treated expansive soil with sulfate solutions, the maximum dry unit weight decreased and optimum moisture content increased with increase in concentration of sulfate solutions when compacted without any compaction delay. With compaction time delay, the lime-stabilized soils mixed with distilled water led to the formation of flocs and aggregation of clay particles and decreased the maximum dry unit weight and optimum moisture content. However, the effect of compaction time delay was negligible on maximum dry unit weight as the formation of flocs and aggregation of clay particles were inhibited in lime-treated soil mixed with sulfate solutions. These changes in dry unit weights and soil structure were reflected on the strength of lime-treated expansive soil as well.read more
Citations
More filters
Journal ArticleDOI
Effect of compaction delay on the strength and consolidation properties of cement-stabilized subgrade soil
TL;DR: In this article, a set of experimental tests including standard compaction, unconfined compressive strength (UCS), and one-dimensional consolidation tests are performed to evaluate the effect of compaction delay on mechanical and consolidation characteristics of cement-stabilized subgrade soil.
Journal ArticleDOI
Ground improvement using chemical methods: A review.
TL;DR: A review of the recent development in ground improvement techniques, especially chemical stabilisers, is presented in this article, where various available chemical stabilizers are identified and compared with other available methods.
Journal ArticleDOI
Significance of compaction time delay on compaction and strength characteristics of sulfate resistant cement-treated expansive soil
TL;DR: In this paper, the authors used the sulfate resistant cement (SRC) as a stabilizer along with the controlled addition of sulfate solutions to mitigate the negative effect of compaction time delay in stabilizing the expansive soil.
Journal ArticleDOI
Settlement characteristics of bridge approach embankment based on scale model test
TL;DR: In this paper, a scale model was built based on the structural characteristics of bridge approach embankment, and scale model tests were carried out under different conditions, and the results showed that when graded gravels were selected as the backfill materials, the effect of setting approach slab to reduce the differential settlement is more prominent.
Journal ArticleDOI
Novel Approach for Suppression of Ettringite Formation in Sulfate-Bearing Soil Using Blends of Nano-Magnesium Oxide, Ground Granulated Blast-Furnace Slag and Rice Husk Ash
TL;DR: In this paper, the authors investigated the use of different materials (nano-magnesium oxide (M), ground granulated blast-furnace slag (GGBS), and rice husk ash (RHA)) for gypseous soil stabilization to prevent ettringite formation.
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.
Book
Foundations on expansive soils
TL;DR: In this article, an extension of the Fondation Reference Record is described. But this record was created on 2004-09-07, modified on 2016-08-08.
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.
Book
Engineering Principles of Ground Modification
TL;DR: Mechanical modification hydraulic modification physical and chemical modification modification by inclusions and confinement.
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.