Correlation between gradational parameters and compaction characteristics of sandy soils

Mujtaba, Hassan; Farooq, Khalid; Sivakugan, Nagaratnam; Das, Braja M.

doi:10.1179/1938636213z.00000000045

Cited by 31 publications

(16 citation statements)

References 6 publications

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“…However, it is recommended that if γdmax and OMC of a finegrained soil is to be predicted either from its plastic or liquid limit, one must use the latter one for better accuracy. This point is also matched with Mujtaba et al [17].…”

Section: Variation Of Omc and Mdd With Plastic Limitsupporting

confidence: 90%

Untitled

2019

CTCSE

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Compaction parameters determination in the laboratory require considerable time and effort that can be saved by using empirical correlations at the early stages. This paper introduces some efforts to predict the compaction properties of soils using the index test results. Apart from the experimental result, the result from other literature have also been considered in the analysis here. Different statistical investigation such as histogram, ACF, PACF, kernel function, correlogram and cross correlogram are used to find the relationship of liquid limit, plastic limit and plasticity index with optimum moisture content and maximum dry density. Regression analyses are done with support vector machine algorithm. The best R squared value found from the predicted equation is 0.86 for optimum moisture content and 0.91 for maximum dry density.

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Section: Variation Of Omc and Mdd With Plastic Limitsupporting

confidence: 90%

Untitled

2019

CTCSE

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“…The correlation coefficient (R 2 ) is an index of the goodness of fit between the predictive correlation and sample data used to develop that correlation. It provides a quantitative index of association between measured and predicted values and indicate the accuracy for the future predictions [9,27]. For γ dmax(m) models, the value of R 2 varied from 0.78 to 0.99 and the R 2 value was 0.78 to 0.94 for w opt(m) models as shown in Figs.…”

Section: Effect Of Plasticity Index On Compaction Parametersmentioning

confidence: 99%

“…Therefore, to minimize the effort and to save the time, many researchers have proposed the regression models to predict the compaction parameters based on the physical properties of soils. Among them, these studies [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] are the most significant. The maximum dry density and optimum water content obtained depend on several soil parameters such as (a) the percent of fines, (b) specific gravity of soil solids (G s ), (c) amount of fine-grained soils, (d) liquid limit and plasticity index, (e) grain size distribution and shape factor of grains in the case of granular soils, and (f ) compaction effort imported to the soil [17].…”

Section: Introductionmentioning

confidence: 99%

“…Noor et al [8] also established a model to predict the standard compaction characteristics of fine-grained soils with three variables such as plastic limit, plasticity index and specific gravity. Mujtaba et al [9] collected 110 samples of sandy soils and developed the correlations of compaction parameters with uniformity coefficient (C u ) and compaction effort and validated these correlations by using the results of 40 similar samples. Moreover, modest efforts have also been made to apprehend the effect of plasticity on compaction parameters of the fine grained soils.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of compaction parameters of fine-grained soils using standard and modified efforts

Khalid

Rehman

2018

Geo-Engineering

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Compaction characteristics of the soil have the great importance for practically achieving the desired strength, permeability and compressibility of soil during the construction. Standard compaction test (SCT) and modified compaction test (MCT) are two very famous laboratory test methods to determine the compaction characteristics of soils worldwide. Modest efforts have been made in the past to correlate the compaction parameters drawn from these two tests with each other. In the present study, authors are established the models to predict the modified compaction parameters (γ dmax(m) and w opt(m)) by using standard compaction parameters (γ dmax(s) and w opt(s)) or vice versa for the fine-grained soils. Such models can extricate from performing additional tedious and laborious compaction tests. Moreover, the effect of plasticity on the compaction parameters obtained using standard and modified effort is also discussed. Total 156 disturbed fine-grained soil samples were collected from different areas of Pakistan. The index properties tests and laboratory compaction tests were performed using these soil samples. On the basis of index properties tests, these soil samples were classified into different subgroups of fine-grained soil as per the Unified Soil Classification System. Relationships between the plasticity index (I P) and compaction parameters of both MCT and SCT were also accomplished. Out of 156 soil samples, test results of 126 samples are used to develop the correlations and test results data of 30 samples was used to validate the developed correlations. The percentage error in the correlation between γ dmax(m) and γ dmax(s) is observed to be only ± 0.4% and for the correlation between w opt(m) and w opt(s) the percentage error is observed to be ± 2.7%.

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“…S. Horpibulsuk et al have reported that the engineering properties are the function of the physical properties of compacted soils. They have further derived a relationship between the relative density of 90-100% and CBR incorporating Ohio's and modified Ohio's curves for different soil types [11,38,39]. Estimation of or from the RC has not been appraised in the presented literature.…”

Section: Literature Reviewmentioning

confidence: 99%

Appraisal of Bearing Capacity and Modulus of Subgrade Reaction of Refilled Soils

Arshid

Kamal

2020

Civ Eng J

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Soil is remoulded, replaced, or improved in place to meet the required engineering properties. Relative compaction is the measure of the resulting engineering improvement. But design engineers need the allowable bearing capacity while the modulus of subgrade reaction is the primary input of modern foundation design software. The current research appraised a correlation between Relative Compaction ( ), Moisture Content ( ), and allowable bearing capacity ( ) and another correlation between , RC, MC, and modulus of subgrade reaction ( ). The test samples were extracted from each trial of the standard proctor test using purpose-built extraction tubes. Allowable bearing capacity has been determined by performing unconfined compression tests on the extracted tubes. The relationships have been established employing statistical analysis. It was noticed that soil samples at the lower moisture content (6-9%) show brittle failure before reaching the allowable strain. The soil samples having a moisture content of 10-14% exhibited shear failure, nearly simultaneous to the allowable strain. The soil samples having higher moisture content undergone a strain of 15% without showing the shear failure. A simple equation has also been appraised to determined Ks involving the three-input variable, i.e., , , and . Moderate correlations have been found to exist between the studied parameters, owing to some other variables' influence. Recommendations for future studies have been drawn to quantify the effect of identified parameters. Doi: 10.28991/cej-2020-03091606 Full Text: PDF

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Correlation between gradational parameters and compaction characteristics of sandy soils

Cited by 31 publications

References 6 publications

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Evaluation of compaction parameters of fine-grained soils using standard and modified efforts

Appraisal of Bearing Capacity and Modulus of Subgrade Reaction of Refilled Soils

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