Study on strength and volume change behavior of stabilized black cotton soil with different pH of soil-lime mixes for pavement subgrade

Chitragar, Srinivas F.; Shivayogimath, C. B.; Mulangi, Raviraj H.

doi:10.1007/s42947-020-0117-x

Cited by 12 publications

(8 citation statements)

References 21 publications

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“…The SEM, an advanced technique that aids in understanding the soil structure's behavior when combined with various industrial waste materials and fibers. This method enables a detailed examination of how the soil responds to different mixtures (43). The SEM image distinctly reveals the presence of crystalline particles, which illustrates the flocculation of soil and reduction of voids.…”

Section: Scanning Electron Microscopy (Sem) and Energy Dispersive Spe...mentioning

confidence: 99%

Unconfined Compressive Strength of Cement Stabilized Soil Using Industrial Wastes Including Optimization of Polypropylene Fiber

Girinivas,

Hanamasagar

2024

IJE

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This Study is focused on suitability of industrial wastes in cement stabilized soil. The investigation is based on Unconfined compressive strength (UCS) tests. Experimental work is carried out to compare the UCS of cement stabilized soil specimens with different proportion of industrial wastes like Iron ore tailing, Quarry dust, Fly ash and Bagasse ash. The mix proportion is designed such that clay content is maintained at 10.5% for fine grained soil and density of 17.5 kN/m 3 . It is observed that the mix comprising industrial wastes and fiber have improved the mechanical properties compared to cement stabilized soil. Fiber addition has improved post peak behavior of soil specimen. The Scanning Electron Microscopy (SEM) microstructure images depict soil particle flocculation, leading to an increase in compressive strength and Energy Dispersive X-ray Spectroscopy (EDS) studies suggest the use of industrial wastes with natural soil helps in strengthening of soil cement stabilization, as well as to minimize the environmental pollution.

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Section: Scanning Electron Microscopy (Sem) and Energy Dispersive Spe...mentioning

confidence: 99%

Unconfined Compressive Strength of Cement Stabilized Soil Using Industrial Wastes Including Optimization of Polypropylene Fiber

Girinivas,

Hanamasagar

2024

IJE

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“…This test gives information for evaluating the lowest soil-lime percentage, which resulted in a maximum pH of 11.98 indicating the specification of lime for soil improvement. Chitragar, et al [37] reported a pH value of 12.4 for the 7% lime and soil solution used for soil stabilization. The test was performed on a 25gm soil sample with different percentages of lime such as 0, 2, 3, 4, 5, 6, 8 and 10% mixed in 100 ml distilled water.…”

Section: Optimal Percentage Of Lime From Lime-soil Phmentioning

confidence: 99%

Mechanism of improvement and best-fit models for the prediction of geotechnical properties of lime stabilized expansive soil used in pavement subgrade

Naveed,

Ahmed,

Ullah

et al. 2024

Mehran Univ. res. j. eng. technol.

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The performance of a pavement mainly depends on the quality of the subgrade layer. Expansive soils (ES) are extensively found worldwide including Pakistan. The inadequate strength and swelling behaviour of these soils are the main problems in any road construction project. Several researchers in the last decades have attempted to improve expansive soil utilizing various materials such as lime, brick kiln dust and fly ash. The purpose of this research was to evaluate the effect of lime on the engineering properties of the ES of a highway subgrade in the Sialkot region of Pakistan. The influence of different lime dosages (0%, 2%, 4% and 6%) at curing ages (1, 7, 14 and 28 days) has been examined by pH tests, plasticity tests, compaction tests, unconfined compressive strength (UCS), free swell index, and California Bearing Ratios (CBR). A field CBR and plate load test (PLT) on the natural soil and optimum lime-treated soil with various curing periods have been carried out for applicability as subgrade material. The test findings demonstrated that higher lime dosages increased the strength and ultimate bearing capacity (𝑞𝑢𝑙𝑡) of improved ES and at the same time decreased the free swelling index (FSI), optimum moisture content (OMC), maximum dry density (MDD) and permanent deformation of the subgrade soil. The UCS values of soil treated with 2%, 4% and 6% lime increased almost by 324%, 523%, and 249% for unsoaked samples and 285%, 351% and 231% for soaked samples respectively as compared to the plain soil at 28 days curing period. The laboratory CBR values significantly increased 2.35-8.50 times and field CBR improved 5.6 times as compared to the plain soil. The 𝑞𝑢𝑙𝑡 of lime-treated soil increased by 162% as compared to the plain soil and permanent deformation reduced from 33 mm to 2 mm after 28 days. Furthermore, equations were developed to estimate the best fit for the prediction of various geotechnical parameters and coefficient of determination (R2 ) values for all equations were found higher than 0.90. From the results, it has been concluded that adding the optimum lime content of 4% by weight satisfies the requirement for the subgrade construction of highways and the developed expressions can provide a scientific basis for estimating the geotechnical parameters.

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“…Materials 2022, 15, x FOR PEER REVIEW 6 of 20 14.04%, respectively. At this time, the particle grading curves of the soil specimens evidently tend to be stable, indicating that the reaction rate of lime slows down and the particle influence on size composition of soil specimens slows down.…”

Section: Particle Gradationmentioning

confidence: 99%

“…As a repair material, lime is widely used to improve the mechanical properties of rammed soils in the restoration of ancient rammed earth projects [3][4][5][6][7][8][9][10][11]. However, due to the differences in external environment, material composition and construction technology [12][13][14][15][16][17], a large number of cracks, flakes and other diseases often appear on the outer surface of earthen city walls repaired with lime soil. As shown in Figure 1, the quality of the newly built earthen city wall is inferior to that of the old original city wall.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Cracking and Mechanical Properties of Lime Soil with Different Slaking Conditions of Newly Repaired Earthen City Walls

Yue

Song

et al. 2022

Materials

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In this paper, a method to control the lime reaction by different slaking conditions is proposed to reduce the occurrence of cracks in newly repaired earthen city walls. The effects and mechanisms of the slaking time (0 h, 12 h, 24 h, 48 h and 72 h), lime content (10%, 15% and 20%), and moisture content (14%, 18% and 22%) on the cracking and mechanical properties of lime soil were analyzed by the test results of surface cracks, triaxial compression, particle gradation, pH value, X-ray diffraction and scanning electron microscope. The results show that proper slaking of lime soil specimens can reduce surface cracks and improve mechanical properties. After 12 h of appropriate slaking, the crack rate of the lime soil with 20% content decreased by 97.13%, the cohesion increased by 20.27%, and the internal friction angle decreased by 11.27%. However, the mechanical properties decreased when the slaking time was too long. After 72 h of slaking, the cohesion of 20% lime soil decreased by 8.21% and the internal friction angle increased by 2.82%. Further analysis shows that the appropriate slaking conditions can regulate the reaction rate and alkali environment, control the lime produced cementitious substances, improve the particle gradation and further reduce the occurrence of surface cracks. These results provide a basis for the restoration technology of newly repaired earthen city walls.

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Study on strength and volume change behavior of stabilized black cotton soil with different pH of soil-lime mixes for pavement subgrade

Cited by 12 publications

References 21 publications

Unconfined Compressive Strength of Cement Stabilized Soil Using Industrial Wastes Including Optimization of Polypropylene Fiber

Unconfined Compressive Strength of Cement Stabilized Soil Using Industrial Wastes Including Optimization of Polypropylene Fiber

Mechanism of improvement and best-fit models for the prediction of geotechnical properties of lime stabilized expansive soil used in pavement subgrade

Experimental Study on the Cracking and Mechanical Properties of Lime Soil with Different Slaking Conditions of Newly Repaired Earthen City Walls

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