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SM Rao

Bio: SM Rao is an academic researcher. The author has contributed to research in topics: Silt & Calcium oxide. The author has an hindex of 1, co-authored 1 publications receiving 21 citations.

Papers
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Journal ArticleDOI
TL;DR: In this paper, the authors investigated the effect of lime-attributed changes occurring in the particle growth of soil systems in a marine environment, and found that there is an increase in the size of clay particles towards silt or fine sand fraction due to lime treatment.
Abstract: Lime is commonly used to improve the engineering behavior of marine clay. But there is a need to investigate the lime-attributed changes in a particulate system in a marine environment. Lime columns 50 mm in diameter and 500 mm in length were installed in test tanks 600 mm in diameter at a depth of 550 mm, while lime injection was attempted in a test tank, 1000 by 1000 by 750 mm. The present investigation deals with experimental work carried out in the laboratory using lime column and lime injection techniques to stabilize an Indian marine clay in a salt water environment. Different inorganic additives were used with lime as column filler material to study the effect of lime-attributed changes occurring in the particle growth of soil systems. Grain-size distribution tests and SEM technique were carried out to study the lime-induced changes on the constituent particles. The test results indicate that there is an increase in the size of clay particles towards silt or fine sand fraction due to lime treatment. The formation of aggregates due to lime-soil reactions can be seen in the micrographs of different lime-treated soil systems, and the same has been confirmed using the SEM technique.

21 citations


Cited by
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Journal ArticleDOI
TL;DR: In this paper, the authors reviewed the earlier reported case histories of sulphate attack in lime and cement stabilized clays and a list of precautionary measures to be adopted for controlling the ettringite formation have been suggested.

203 citations

Journal ArticleDOI
TL;DR: In this paper, the performance of different mixtures in terms of soil stabilization was assessed by performing mechanical tests on samples submitted to several curing conditions (temperature and humidity) and the results showed that the tested compounds are likely to alter the soil stabilization processes and thus lower the mechanical performance of the stabilized soil.

85 citations

Journal ArticleDOI
TL;DR: The use of lime to improve the behavior of soft clays is not new. as mentioned in this paper examined lime-induced changes in the compressibility of marine clay and found that a reduction of 1/2 to 1/3 in the soil system within 30 to 45 days of treatment.

77 citations

Journal ArticleDOI
TL;DR: In this paper, the fuel oil contaminated soil samples exhibit drastic changes in their geotechnical parameters, such as decrease in maximum dry density (−4), cohesion (−66), angle of internal friction (−23%), and unconfined compressive strength (−35%) and increase in liquid limit (+11%).
Abstract: Fuel oil contamination brings adverse effect on basic geotechnical properties of foundation soil. The present study pertains to one such case, from the petrochemical complex near Vadodara City in Gujarat State, India. Here, the fuel oil contaminated soil samples exhibit drastic changes in their geotechnical parameters. Noteworthy among such deleterious changes are: decrease in maximum dry density (−4%), cohesion (−66%), angle of internal friction (−23%) and unconfined compressive strength (UCS) (−35%) and increase in liquid limit (+11%). An attempt has been made to stabilize the contaminated soil using various additives viz., lime, fly ash and cement independently as well as an admixture of different combinations. It is apparent from the test results that the stabilization agents improved the geo-technical properties of the soil by way of cation exchange, agglomeration, and pozzuolanic actions. The best results were observed when a combination of 10% lime, 5% fly ash and 5% cement was added to the contaminated soil. The improvement in unconfined compressive strength (UCS), cohesion and angle of internal friction can be attributed to neo-formations such as Calcium Silicate Hydrates (CSH, CSH-1) that coats and binds the soil particles. Formation of stable complex between oil and metallic cations, results in reduction of leachableoil.

72 citations