Reduction of Expansive Index, Swelling and Compression Behavior of Kaolinite and Bentonite Clay with Sand and Class C Fly Ash

Kolay, Prabir K.; Ramesh, KJ

doi:10.1007/s10706-015-9930-4

Cited by 59 publications

(28 citation statements)

References 13 publications

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“…Similar positive effects have been proven when fly ash is used in clays [6,7]. Kolay and Ramesh [8] found a reduction of the Atterberg limits and swelling when fly ash was added to clayey soils. Horpibulsuk et al [9] also reported a strength increase of clayey soils when using fly ash as a binder [10], with similar results to those obtained by other researchers [11][12][13].…”

Section: Introductionsupporting

confidence: 63%

Evaluation of the Improvement Effect of Limestone Powder Waste in the Stabilization of Swelling Clayey Soil

et al. 2019

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The natural stone industry generates large amounts of industrial waste every year. Limestone powder produced by the activity of this industry is dumped into landfills, generating an environmental impact that could be reduced by using this waste as a binder in building materials. In the present work, the use of this by-product as an addition for soil improvement of clayey soils has been studied. The tested natural soil is a soft clay from southeastern Spain, which has been mixed by adding 5, 10, 15, 20, and 25% of dry limestone dust by total dry weight of the soil. The natural soil and the additive have been characterized, in addition to the common geotechnical tests, by means of X-Ray diffraction and X-Ray Fluorescence. The improvement of the geotechnical properties of the mixed soil has been evaluated by means of the change in the Atterberg limits, free swell index, unconfined compressive strength, and one-dimensional consolidation test. The change in the microstructure of the mixed soil has been studied by scanning electron microscopy. In general, the results obtained show an increase in the strength of the soil and a reduction of its deformability when limestone powder is added.

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Section: Introductionsupporting

confidence: 63%

Evaluation of the Improvement Effect of Limestone Powder Waste in the Stabilization of Swelling Clayey Soil

et al. 2019

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“…erefore, the plasticity index decreases significantly with the reduction of the amount of clay particles and hydrophilic minerals. e results obtained in this study are similar to Feng et al [11] and Kolay and Ramesh [14]. It is found that the plasticity index is a good indicator of swelling behaviors, namely, a lower plasticity index indicates a weaker expansibility [21].…”

Section: Physical-mechanical Test Resultssupporting

confidence: 88%

“…In aspect of physical stabilization, sand is a nonexpansive soil with minimum plasticity and has no type of charge on its surface. e addition of sand into expansive soil helps to balance the electrical charge in expansive soil and then mitigates the expansion [14]. In addition, sand is broadly applied in civil engineering materials by its abundant source and low price.…”

Section: Introductionmentioning

confidence: 99%

Experimental Research on Microstructure and Physical‐Mechanical Properties of Expansive Soil Stabilized with Fly Ash, Sand, and Basalt Fiber

Cao

Yuan

2018

Advances in Materials Science and Engineering

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Expansive soil is a source of risk to the foundations or subgrade engineering. Stabilization of expansive soil is imperative for practical engineering. A series of laboratory experiments were performed to analyze the physical-mechanical properties and microstructures of stabilized soil. Three stabilizers used in this study are fly ash, sand, and basalt fiber. Different percentages of fly ash (0, 5, 10, 15, and 20%), sand (0, 8, 16, and 24%), and basalt fiber (0 and 0.4%) were added by weight into natural soil. Experimental results indicate that the optimum moisture content of stabilized soil increases with the increase of fly ash content for a given sand content, whereas the maximum dry density shows a decreasing trend. The variation trend of optimum moisture content and maximum dry density turns reverse with the increase of sand content for a given fly ash content. Plasticity index is decreased by both increasing fly ash content and sand content. It is found that the maximum unconfined compressive strength and optimum growth rate of strength are obtained by selected mixtures of 10% fly ash, 8% sand, and 0.4% basalt fiber contents. As the analysis of complementary effect suggests, most of the mixt treatments applied in this study have produced good results associated with the strength enhancement of expansive soil. In line with the results of SEM tests, the connection among clay particles has been enhanced through the generation of hydration products (C-S-H and AFt) of fly ash. The filling effect of sand has increased the integrality and compactness of stabilized soil. Moreover, the gripping effect between fibers and soil particles notably improves the strength of stabilized soil. The effect of sand on reinforced soil with 0.4% basalt fiber increases the interfacial force between fibers and soil particles.

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“…The review of literature reveals that a good number of research works have been carried out for stabilizing the expansive soils by using various industrial wastes via, fly ash, cement kiln dust, lime kiln dust, GGBS, rice husk ash, iron ore tailing, etc. [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. Many others have studied the improvement of various engineering properties of expansive soil on addition of industrial wastes and lime.…”

Section: Introductionmentioning

confidence: 99%

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2018

AAOA

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Reduction of Expansive Index, Swelling and Compression Behavior of Kaolinite and Bentonite Clay with Sand and Class C Fly Ash

Cited by 59 publications

References 13 publications

Evaluation of the Improvement Effect of Limestone Powder Waste in the Stabilization of Swelling Clayey Soil

Evaluation of the Improvement Effect of Limestone Powder Waste in the Stabilization of Swelling Clayey Soil

Experimental Research on Microstructure and Physical‐Mechanical Properties of Expansive Soil Stabilized with Fly Ash, Sand, and Basalt Fiber

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