rakesh kumar Dutta - Academia.edu (original) (raw)

Papers by rakesh kumar Dutta

International Journal of Geological and Geotechnical Engineering, Dec 26, 2019

The paper presents a study on the prediction of the shear wave velocity (Vs) for all soils using ... more The paper presents a study on the prediction of the shear wave velocity (Vs) for all soils using ANN model from cone penetration test data. The input parameters in the obtained of ANN models were vertical effective stress, sleeve friction, cone tip resistance and output was the shear wave velocity. These parameters were considered to construct the ANN model which has 3-2-1 topology in prediction of shear wave velocity. Further, utilizing the RMSE, MAE, MSE, MAPE, determination coefficient (R2) and correlation coefficient (r) for training and testing data set, performance of artificial neural networks was investigate utilizing different activation function. The created ANN model had an adequate precision. The contribution of input parameters on prediction of shear wave velocity was determined by sensitivity analysis and it is found that the contribution of vertical effective stress was 84% on the output shear wave velocity. It was much more as compared to other parameters. Therefore, the ANN model having topology of 3-2-1 was better as compared to the one developed using multi linear regression analysis (MLRA) as well as previously reported correlations in literature to estimate the shear wave velocity. Finally, an equation was proposed for the ANN model based on trained of weights and biases obtained.

The effect of chemically treated coir fibres on the strength characteristics of clayis presented ... more The effect of chemically treated coir fibres on the strength characteristics of clayis presented in this study. A series of consolidated undrained test were performed on soil reinforced with untreated, sodium hydroxide treated and potassium permanganate treated fibres. The coir fibre content was varied from 0.25% to 1.5%. The results indicated that the optimum moisture content of clay reinforced with untreated/treated coir fibres increases with the increase in fibre content. The optimum moisture content of clay reinforced with treated coir fibres was less in comparison to untreated coir fibres. KMnO4 treated coir fibre absorbs slightly less water in comparison to NaOH treated coir fibres in clay. The dry unit weight of clay reinforced with untreated/treated coir fibres decreases with the increase in fibre content. The dry unit weight of clay reinforced with treated coir fibres was higher in comparison to untreated coir fibres. Reinforcing clay with KMnO4 treated coir fibre results i...

Lecture Notes in Civil Engineering, 2021

The assessment of soil properties for the design of structure requires a wide range of tests. Sam... more The assessment of soil properties for the design of structure requires a wide range of tests. Sampling difficulty, time and cost constraints forces the practitioners to adopt correlations existing among the in situ tests and the physical or mechanical properties of soils. This paper presents the application of neural network to predict the cone side resistance (qs) obtained in the cone penetration test (CPT) for the cohesive soil based on plasticity index (PI), consistency index (CI) and the under drained shear strength (Su). Feed-forward back propagation algorithm was used for this purpose for the development of neural network model which was developed using 50 in situ dataset collected from the literature. Finally, the cone side resistance obtained from the developed neural network model was compared with the measured cone side resistance obtained from the CPT tests reported in literature. Further, the sensitivity analysis was performed to study the impact of plasticity index, con...

The paper presents the prediction of the ultimate bearing capacity of different regular shaped sk... more The paper presents the prediction of the ultimate bearing capacity of different regular shaped skirted footing resting on sand using the artificial neural network. The input parameters for the artificial neural network model were normalised skirt depth, area of the footing and the friction angle of the sand, while the output was the ultimate bearing capacity. The artificial neural network algorithm uses a back propagation model. The training of artificial neural network model has been conducted and the weights were obtained which described the relationship between the input parameters and output ultimate bearing capacity. Further, the sensitivity analysis has been performed and the parameters affecting the ultimate bearing capacity of different regular shaped skirted footing resting on the sand were identified. The study shows that the prediction accuracy of the ultimate bearing capacity of different regular shaped skirted footing resting on sand using artificial neural network mode...

Transportation Infrastructure Geotechnology, 2021

The investigation aims to check the effect of variation of gypsum and water content on the engine... more The investigation aims to check the effect of variation of gypsum and water content on the engineering properties of expansive soil by different experiments, namely, mini compaction test, Atterberg limit’s test, and unconfined compressive strength test along with microstructural analysis. The effect of gypsum (0%, 2%, 4%, 6%, 8%, and 10%), water content (ωopt − 3%, ωopt, and ωopt + 3%), and curing period up to 28 days on the strength of bentonite-gypsum mixtures was highlighted. The results of bentonite-gypsum mixtures showed an increment in maximum dry unit weight and decrement in the optimum water content up to 4% inclusion of gypsum. A gradual reduction in the liquid limit and plastic limit of bentonite-gypsum mixtures was observed with the increase in gypsum content and curing period. The unconfined compressive strength of the bentonite-gypsum mixtures increased continuously with the increase in gypsum content, water content, and curing period. The microstructural behavior of be...

The objective of the present study is to investigate the effect of randomly distributed tire chip... more The objective of the present study is to investigate the effect of randomly distributed tire chips, derived from waste tires on the durability of reference mix containing fly ash, lime and gypsum. The dry, water, sodium hydroxide and carbon tetra chloride treated tire chips were used in the study. The tire chip content was varied from 5% to 15% and specimen were cured for 7, 28, 90, and 180 days with two different curing methods (in a dessicator and water filled container). The results of the study revealed that the weight loss of reference mix mixed with dry tire chips can be decreased with treatment with water, sodium hydroxide and carbon tetra chloride. Decrease in weight loss was highest with carbon tetra chloride followed by sodium hydroxide and water. Further, the weight loss of reference mix with dry/treated tire chip decreased with the increase in curing period and the decrease was highest when specimens were cured in water filled container. The weight loss of the reference ...

Journal of Geotechnical Engineering, 2020

In the present paper, the effect of alccofine and tyre buffings addition on the compression and b... more In the present paper, the effect of alccofine and tyre buffings addition on the compression and bearing ratio of sand are evaluated through laboratory study. On the basis of compaction test, a reference mix composed of sand + 12 % alccofine + 2 % tire buffing was selected for further study. The unconfined compression and bearing ratio test on the reference mix was then carried out by curing the sample for 7, 14 and 28 days respectively. The compression strength and penetration resistance of the reference mix were found to increase substantially with increase in curing period. The obtained compression strength and bearing ratio of the reference mix suggests that the reference mix can be effectively used for pavement application and further will help in utilizing the waste quantity of tire buffings.

Jordan Journal of Civil Engineering, 2014

This paper presents the engineering properties such as compaction, unconfined compressive strengt... more This paper presents the engineering properties such as compaction, unconfined compressive strength, consistency limits, free swell index, California bearing ratio and consolidation of bentonite stabilized with lime and modified with gypsum. The content of lime and gypsum was varied from 0 to 10% and from 0.5 to 8%, respectively, to check the improvement in the engineering properties. The results of this study revealed that the dry unit weight and optimum moisture content of bentonite + 8% lime increased with the addition of 4% gypsum. The unconfined compressive strength of bentonite did not change with the increase in curing period. The unconfined compressive strength of bentonite + 8% lime increased with the addition of 4% gypsum. Beyond 4%, the unconfined compressive strength decreased. The unconfined compressive strength of bentonite-lime-gypsum mix increased with the increase in curing period. The liquid limit, plastic limit and free swell index of bentonite + 8% lime decreased;...

The present study tries to predict the settlement of shallow foundation on granular soil using a ... more The present study tries to predict the settlement of shallow foundation on granular soil using a mathematical model. The application of feed-forward neural networks with back propagated algorithm is followed for the same. For the development of ANN model, 193 in situ tests data were collected from the literature. The inputs required for the development of model were the foundation pressure, width of footing and the standard penetration number. The predicted settlement using this model was found to compare favourably with the measured settlement. Further the results of sensitivity analysis indicated that the width of foundation has highest impact on the predicted settlement in comparison to other input variables. The present study confirms the ability of ANN models to predict a complex relationship between the nonlinear data as in present case.

The effect of chemically treated coir fibres on shear strength, bearing ratio and settlement beha... more The effect of chemically treated coir fibres on shear strength, bearing ratio and settlement behavior of clay is presented in this study. The clay in the present study is reinforced with untreated, sodium hydroxide-treated and potassium permanganate-treated coir fibres. The shear strength behavior of unreinforced as well as reinforced clay is examined by conducting a series of unconfined compression strength, direct shear tests. Additionally, the load deformation and compressibility characteristics of unreinforced and reinforced soil are studied by performing bearing ratio and consolidation tests. The coir fibre content was varied from 0.25% to 1.5%. The results of unconfined compression strength tests on saturated and unsaturated clay indicated that the deviator stress at failure of clay and clay with untreated coir fibres can be increased by treatment with potassium permanganate and sodium hydroxide. Further, the results of direct shear tests on clay in saturated and unsaturated s...

The paper presents the bearing ratio behavior of sand overlying clay with two woven and two non-w... more The paper presents the bearing ratio behavior of sand overlying clay with two woven and two non-woven treated coir geotextiles at the interface. The chemicals such as p-aminophenol, sodium periodat...

The paper presents the suitability of flyash-limephosphogypsum composite for its use in road pave... more The paper presents the suitability of flyash-limephosphogypsum composite for its use in road pavements. The content of lime and phosphogypsum was varied from 2 to 10% and 0.5 to 4% respectively in flyash. The specimen prepared was cured for 7, 28, 56 and 90 days with burlap method of curing. Compaction tests were conducted on different flyash-lime-phosphogypsum composite and these results were used for casting cylindrical specimens for unconfined compressive strength, split tensile strength, slake durability and for determination of bearing ratio. It has been concluded that flyash-lime-phosphogypsum composite satisfy the unconfined compressive strength, split tensile strength, slake durability criteria as well as giving higher bearing ratio values at 28 days of curing. Good agreement is observed between the experimental values and predicted values for tensile strength, bearing ratio, slake durability indices. The developed models will be useful for making preliminary estimate of the...

In the recent past, the soft computing techniques have received a significant attention for solut... more In the recent past, the soft computing techniques have received a significant attention for solution of the geotechnical stability problems. Following the trend, the present study tries to explore the use of different soft computing techniques such as random forest regression, support vector machines (SVM) RBF kernel, SVM poly kernel and M5P model tree for the prediction of deviator stress of sand reinforced with waste plastic strips. The deviator stress (s) was assumed to be dependent on strip content (SC), strip elongation at failure (ets), aspect ratio (AR) of strip, confining pressure (CP), and strain at failure of the composite specimen (e). The performance of each soft computing technique was assessed with the help of various standard statistical parameters. The findings of the present study revealed that the SVM RBF kernel approach was quick and accurate tool for predicting the deviator stress of sand reinforced with waste plastic strips. Further the sensitivity analysis con...

Journal of Natural Fibers

ABSTRACT The paper presents the bearing ratio behavior of sand overlying silty sandy with two wov... more ABSTRACT The paper presents the bearing ratio behavior of sand overlying silty sandy with two woven and two non-woven treated coir geotextiles at the interface under unsoaked and soaked condition. The chemicals such as sodium hydroxide and potassium permanganate were used to treat the coir geotextiles. The coir geotextiles were placed at two different locations (Designated as Series A and Series B). The results indicated that the bearing ratio of the sand overlying silty sand with untreated/ treated woven/non-woven coir geotextiles at the interface was higher in the unsoaked condition in comparison to soaked condition for the Series A and Series B. The improvement in the bearing ratio of the sand overlying silty sand with untreated/ treated woven/non-woven coir geotextiles at the interface in the unsoaked/soaked condition was higher for the Series A in comparison to the Series B. The bearing ratio of the sand overlying silty sand increased when the woven/non-woven coir geotextiles at the interface were treated with sodium hydroxide. The improvement in the bearing ratio of the sand overlying silty sand with potassium permanganate treated woven/non-woven coir geotextiles at the interface was higher in comparison to the sodium hydroxide treated woven/non-woven coir geotextiles. The highest improvement in the bearing ratio was achieved when both the woven/non-woven coir geotextiles were treated with sodium hydroxide followed by potassium permanganate.

Periodica Polytechnica Civil Engineering, 2015

The effect of treated coir fibres on the shear strength behaviour of clay is presented in this st... more The effect of treated coir fibres on the shear strength behaviour of clay is presented in this study. A series of consolidated undrained test were performed on soil reinforced with untreated, sodium hydroxide treated and carbon tetrachloride treated fibres. The coir fibre content was varied from 0.4% to 1.6%. The results indicated that the deviator stress at failure of the clay and clay with untreated coir fibres can be increased by treatment with carbon tetrachloride and sodium hydroxide. A significant increase was also observed in shear strength parameters of clay reinforced with coir fibres at different percentages. The two parameter dependent hyperbolic models were used for predicting the experimental results. The back predicted stressstrain curve at different fibre percentage was found to compare well with the experimental results. The clay reinforced with untreated/treated coir fibres has shown improved strength behaviour, it can be used for short term stability problems.

Journal of Materials in Civil Engineering, 2011

The paper presents the potential and effect of treated tire chips on the unconfined compressive s... more The paper presents the potential and effect of treated tire chips on the unconfined compressive strength in the reference mix containing fly ash, lime, and gypsum. Dry, sodium hydroxide–, and carbon tetrachloride–treated tire chips were used in the study. The tire chip content varied from 5 to 15%. The specimen prepared was cured for 7, 28, 90, and 180 days with three different curing methods (in a dessicator, burlap, and water-filled container). The results indicated that the unconfined compressive strength of the reference mix with dry tire chips can be increased by treatment with carbon tetrachloride and sodium hydroxide. The increase in unconfined compressive strength was highest with carbon tetrachloride treatment. The results further revealed that the increase in unconfined compressive strength was highest when cured in water-filled container, followed by burlap and dessicator. The unconfined compressive strength increased with curing period, and the increase was significant up to a curing period of...

ejge.com

... 12% cement content is the optimum for use as a base course in highway pavements. REFERENCES. ... more ... 12% cement content is the optimum for use as a base course in highway pavements. REFERENCES. Al-Khanbashi, A., AMO Mohamed, A. Moet, and B. Hadi (2000) Stabilization of desert sand using water-born polymers. Proceedings ...

Prediction of the free swell index of the expansive soil using artificial neural network has been... more Prediction of the free swell index of the expansive soil using artificial neural network has been presented in this paper. Input parameters for the artificial neural network model were plasticity index and shrinkage index, while the output was the free swell index. Artificial neural network algorithm used a back propagation model. Training of the artificial neural network model was conducted on the data collected from literature and the weights and biases were obtained which described the relation among the input variables and the output free swell index. Further, the sensitivity analysis was performed and the parameters affecting the free swell index of the expansive soil were identified. The sensitivity analysis results indicated that the plasticity index (63.97 %) followed by shrinkage index (36.03 %) was affecting the free swell index in this order. The study shows that the prediction accuracy of the free swell index of the expansive soil using artificial neural network model wa...

Revista Ingenieria E Investigacion, 2020

This paper presents the application of artificial neural networks (ANN) and multivariable regress... more This paper presents the application of artificial neural networks (ANN) and multivariable regression analysis (MRA) to predict the bearing capacity and the settlement of multi-edge skirted footings on sand. Respectively, these parameters are defined in terms of the bearing capacity ratio (BCR) of skirted to unskirted footing and the settlement reduction factor (SRF), the ratio of the difference in settlement of unskirted and skirted footing to the settlement of unskirted footing at a given pressure. The model equations for the prediction of the BCR and the SRF of the regular shaped footing were first developed using the available data collected from the literature. These equations were later modified to predict the BCR and the SRF of the multi-edge skirted footing, for which the data were generated by conducting a small scale laboratory test. The input parameters chosen to develop ANN models were the angle of internal friction (ϕ) and skirt depth (Ds) to the width of the footing (B)...