The Experts below are selected from a list of 303 Experts worldwide ranked by ideXlab platform
Akshaya Kumar Sabat - One of the best experts on this subject based on the ideXlab platform.
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application of artificial intelligence to maximum dry density and unconfined compressive strength of cement stabilized Soil
Geotechnical and Geological Engineering, 2011Co-Authors: Pijush Samui, Akshaya Kumar SabatAbstract:This paper describes two artificial intelligence techniques for prediction of maximum dry density (MDD) and unconfined compressive strength (UCS) of cement stabilized Soil. The first technique uses various artificial neural network (ANN) models such as Bayesian regularization method (BRNN), Levenberg- Marquardt algorithm (LMNN) and differential evolution algorithm (DENN). The second technique uses the support vector machine (SVM) that is firmly based on the theory of statistical learning theory, uses regression technique by introducing e-insensitive loss function has been adopted. The inputs of both models are liquid limit (LL), plasticity index (PI), clay fraction (CF)%, sand (S)%, gravel Gr (%), moisture content (MC) and cement content (Ce). The sensitivity analyses of the input parameters have been also done for both models. Based on different statistical criteria the SVM models are found to be better than ANN models for the prediction of MDD and UCS of cement stabilized Soil.
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Application of Artificial Intelligence to Maximum Dry Density and Unconfined Compressive Strength of Cement Stabilized Soil
Geotechnical and Geological Engineering, 2011Co-Authors: Pijush Samui, Akshaya Kumar SabatAbstract:This paper describes two artificial intelligence techniques for prediction of maximum dry density (MDD) and unconfined compressive strength (UCS) of cement stabilized Soil. The first technique uses various artificial neural network (ANN) models such as Bayesian regularization method (BRNN), Levenberg- Marquardt algorithm (LMNN) and differential evolution algorithm (DENN). The second technique uses the support vector machine (SVM) that is firmly based on the theory of statistical learning theory, uses regression technique by introducing ε-insensitive loss function has been adopted. The inputs of both models are liquid limit (LL), plasticity index (PI), clay fraction (CF)%, sand (S)%, gravel Gr (%), moisture content (MC) and cement content (Ce). The sensitivity analyses of the input parameters have been also done for both models. Based on different statistical criteria the SVM models are found to be better than ANN models for the prediction of MDD and UCS of cement stabilized Soil.
Pijush Samui - One of the best experts on this subject based on the ideXlab platform.
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application of artificial intelligence to maximum dry density and unconfined compressive strength of cement stabilized Soil
Geotechnical and Geological Engineering, 2011Co-Authors: Pijush Samui, Akshaya Kumar SabatAbstract:This paper describes two artificial intelligence techniques for prediction of maximum dry density (MDD) and unconfined compressive strength (UCS) of cement stabilized Soil. The first technique uses various artificial neural network (ANN) models such as Bayesian regularization method (BRNN), Levenberg- Marquardt algorithm (LMNN) and differential evolution algorithm (DENN). The second technique uses the support vector machine (SVM) that is firmly based on the theory of statistical learning theory, uses regression technique by introducing e-insensitive loss function has been adopted. The inputs of both models are liquid limit (LL), plasticity index (PI), clay fraction (CF)%, sand (S)%, gravel Gr (%), moisture content (MC) and cement content (Ce). The sensitivity analyses of the input parameters have been also done for both models. Based on different statistical criteria the SVM models are found to be better than ANN models for the prediction of MDD and UCS of cement stabilized Soil.
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Application of Artificial Intelligence to Maximum Dry Density and Unconfined Compressive Strength of Cement Stabilized Soil
Geotechnical and Geological Engineering, 2011Co-Authors: Pijush Samui, Akshaya Kumar SabatAbstract:This paper describes two artificial intelligence techniques for prediction of maximum dry density (MDD) and unconfined compressive strength (UCS) of cement stabilized Soil. The first technique uses various artificial neural network (ANN) models such as Bayesian regularization method (BRNN), Levenberg- Marquardt algorithm (LMNN) and differential evolution algorithm (DENN). The second technique uses the support vector machine (SVM) that is firmly based on the theory of statistical learning theory, uses regression technique by introducing ε-insensitive loss function has been adopted. The inputs of both models are liquid limit (LL), plasticity index (PI), clay fraction (CF)%, sand (S)%, gravel Gr (%), moisture content (MC) and cement content (Ce). The sensitivity analyses of the input parameters have been also done for both models. Based on different statistical criteria the SVM models are found to be better than ANN models for the prediction of MDD and UCS of cement stabilized Soil.
Adam G. Tennant - One of the best experts on this subject based on the ideXlab platform.
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Finite element model application to flexural behavior of cement stabilized Soil block masonry
Materials and Structures, 2020Co-Authors: David A. Weed, Mohammad Hosein Motamedi, K. Gourav, Craig D. Foster, Adam G. Tennant, B. V. Venkatarama ReddyAbstract:A finite element model for Cement-Stabilized Soil block (CSSB) masonry members—including nonlinear stress-strain relationship—has been developed and compared with experimental results. Primarily, this model serves as a simulation tool to study various problems for a large number of stress–strain state and loading conditions of CSSB masonry elements. The model presented is characterized by several parameters experimentally ascertained through triaxial and other testing. Furthermore, these parameters allow the model to capture the elastic, plastic, and softening behavior of CSSB masonry. From a constitutive behavioral standpoint, at small strain levels, the material is approximated as linear elastic. Plastic deformation of the material is captured with a modified version of the Sandia Geomodel, which is specifically designed to replicate geological material behavior. Lastly, at localized softening failure, a damage-like constitutive model which takes into account the normal and shear traction balance on the slip-weakening surface is employed. This model includes cohesion degradation as well as friction under compression. Within the finite element framework, the Strong Discontinuity Approach is used to track localized material failure from element to element. In addition to this, a novel method for modeling interfaces in finite elements is used to replicate the behavior of brick-mortar interfaces. The two featured experiments which are simulated in this study are normal to bedjoint and parallel to bedjoint masonry setups, simplified via a plane strain approximation.
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Behavior of Cement-Stabilized Soil Block Masonry Under Flexure
2016Co-Authors: Adam G. TennantAbstract:A study of Cement-Stabilized Soil block (CSSB) masonry under flexure was carried out using an experimental, practical, and a theoretical approach. Initially, some field work was conducted, monitoring block production and use in Bangalore India. Quality control parameters were also observed such as maintaining standards of clay content, block density, and curing. The first laboratory experimental work conducted was to obtain the basic geotechnical material properties of the raw material used in producing both the blocks and the mortar. A second set of experiments were performed to ascertain the material properties of the components that make up masonry. For example, compressive strength and Young's modulus were determined for both the block and mortar to be used in making various assemblages. A variety of other parameters of the block and mortar were recorded to be later used in finite element modeling (FEM). The third and final set of experiments was performed in the form of five-block prisms and one-meter tall wallettes. The five block prisms were used for testing compressive strength, modulus of elasticity of the masonry, and the flexural bond strength. The experimental portion culminated in the wall panels tested in flexure. A practical application on the experimental data is to see if traditional masonry design codes could be used when constructing out of CSSB units. Since the structural design codes of traditional masonry buildings have been well developed over the past century, many of the same principles may be applicable to CSSB masonry buildings. Though the above research answered critical questions, uncertainty remains on how this material will perform globally. Exploring the detailed mechanical and structural behavior through a finite element model developed specifically for masonry with material parameters for CSSB is also finally explored in this research work.
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Detailed Experimental Review of Flexural Behavior of Cement Stabilized Soil Block Masonry
Journal of Materials in Civil Engineering, 2016Co-Authors: Adam G. Tennant, Craig D. Foster, B. V. Venkatarama ReddyAbstract:Cement stabilized Soil block (CSSB) is a modern earthen building material that is used in the construction of masonry structures. Most studies involving CSSB have focused on how its composition affects strength characteristics and material properties such as erosion. In contrast, very little is currently known about CSSB structural behavior. This study set forth to address the absence of data in this research area, focusing on flexural panel testing, including separate horizontal and vertical bending tests. It was found that CSSB follows traditional masonry reactions; also, through experimental observation, two separate failure modes were identified. A linear elastic analysis confirmed these failure modes and predicted the cracking moment in the specimens analyzed. (C) 2016 American Society of Civil Engineers.
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verification of masonry building code to flexural behavior of cement stabilized Soil block
Journal of Materials in Civil Engineering, 2013Co-Authors: Adam G. Tennant, Craig D. Foster, B. V. Venkatarama ReddyAbstract:AbstractMost studies involving Cement-Stabilized Soil blocks (CSSB) concern material properties, such as the characteristics of erosion and strength and how the composition of the block affects these properties. Moreover, research has been conducted on the performance of various mortars, investigating their material properties and the tensile bond strength between CSSB units and mortar. In contrast, very little is currently known about CSSB masonry structural behavior. Because structural design codes of traditional masonry buildings were well developed over the past century, many of the same principles may be applicable to CSSB masonry buildings. This paper details the topic of flexural behavior of CSSB masonry walls and whether the Masonry Standards Joint Committee (MSJC) code can be applied to this material for improved safety of such buildings.
B. V. Venkatarama Reddy - One of the best experts on this subject based on the ideXlab platform.
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Finite element model application to flexural behavior of cement stabilized Soil block masonry
Materials and Structures, 2020Co-Authors: David A. Weed, Mohammad Hosein Motamedi, K. Gourav, Craig D. Foster, Adam G. Tennant, B. V. Venkatarama ReddyAbstract:A finite element model for Cement-Stabilized Soil block (CSSB) masonry members—including nonlinear stress-strain relationship—has been developed and compared with experimental results. Primarily, this model serves as a simulation tool to study various problems for a large number of stress–strain state and loading conditions of CSSB masonry elements. The model presented is characterized by several parameters experimentally ascertained through triaxial and other testing. Furthermore, these parameters allow the model to capture the elastic, plastic, and softening behavior of CSSB masonry. From a constitutive behavioral standpoint, at small strain levels, the material is approximated as linear elastic. Plastic deformation of the material is captured with a modified version of the Sandia Geomodel, which is specifically designed to replicate geological material behavior. Lastly, at localized softening failure, a damage-like constitutive model which takes into account the normal and shear traction balance on the slip-weakening surface is employed. This model includes cohesion degradation as well as friction under compression. Within the finite element framework, the Strong Discontinuity Approach is used to track localized material failure from element to element. In addition to this, a novel method for modeling interfaces in finite elements is used to replicate the behavior of brick-mortar interfaces. The two featured experiments which are simulated in this study are normal to bedjoint and parallel to bedjoint masonry setups, simplified via a plane strain approximation.
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Detailed Experimental Review of Flexural Behavior of Cement Stabilized Soil Block Masonry
Journal of Materials in Civil Engineering, 2016Co-Authors: Adam G. Tennant, Craig D. Foster, B. V. Venkatarama ReddyAbstract:Cement stabilized Soil block (CSSB) is a modern earthen building material that is used in the construction of masonry structures. Most studies involving CSSB have focused on how its composition affects strength characteristics and material properties such as erosion. In contrast, very little is currently known about CSSB structural behavior. This study set forth to address the absence of data in this research area, focusing on flexural panel testing, including separate horizontal and vertical bending tests. It was found that CSSB follows traditional masonry reactions; also, through experimental observation, two separate failure modes were identified. A linear elastic analysis confirmed these failure modes and predicted the cracking moment in the specimens analyzed. (C) 2016 American Society of Civil Engineers.
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verification of masonry building code to flexural behavior of cement stabilized Soil block
Journal of Materials in Civil Engineering, 2013Co-Authors: Adam G. Tennant, Craig D. Foster, B. V. Venkatarama ReddyAbstract:AbstractMost studies involving Cement-Stabilized Soil blocks (CSSB) concern material properties, such as the characteristics of erosion and strength and how the composition of the block affects these properties. Moreover, research has been conducted on the performance of various mortars, investigating their material properties and the tensile bond strength between CSSB units and mortar. In contrast, very little is currently known about CSSB masonry structural behavior. Because structural design codes of traditional masonry buildings were well developed over the past century, many of the same principles may be applicable to CSSB masonry buildings. This paper details the topic of flexural behavior of CSSB masonry walls and whether the Masonry Standards Joint Committee (MSJC) code can be applied to this material for improved safety of such buildings.
Hiroshi Takahashi - One of the best experts on this subject based on the ideXlab platform.
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Study on Strength of Modified Sludge Produced By Fiber-Cement Stabilized Soil Method Using Several Kinds of Fiber Materials
Lecture Notes in Civil Engineering, 2017Co-Authors: Thanh Nga Duong, Tomoaki Satomi, Hiroshi TakahashiAbstract:In the South of Viet Nam, every year, a large amount of excavated sludge from construction sites has been disposed directly in the final disposal, but the recycling rate of sludge is low. Therefore, in this study, fiber-cement stabilized Soil method was applied to recycle sludge in Viet Nam. Moreover, paper, rice straw, rice husk, and cornsilk were used as fiber materials in this method because they are waste materials and easily obtained in Viet Nam. Four kinds of fiber and cement were used to improve sludge and unconfined compression tests were carried out to collect failure strength and strain data. The experiments were performed under 28 mixing conditions. The water, fiber, and cement content were changed to find out which fiber material is the most suitable to modify sludge in Viet Nam. The results showed that rice straw gave the best results to modify sludge by using fiber-cement stabilized method.
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Evaluation of deformation-strength characteristics of Fiber-Cement-Stabilized Soil by using Distinct Element Method
Journal of Japan Society of Civil Engineers, 2011Co-Authors: Tomoaki Satomi, N. Konda, Hiroshi TakahashiAbstract:Fiber-Cement-Stabilized Soil method is an effective way to recycle high-water content mud. The modified Soil has several advantages such as high failure stress and high failure strain. However, the quality of the modified Soil is not constant and depends on the water content of the mud and additives. Therefore, experimental verification to obtain the strength characteristics of the modified Soil is necessary, but conducting experiments under various conditions is ineffective and uneconomic. In this study, a numerical model to estimate deformation-strength characteristics of the modified Soil is investigated by using Distinct Element Method (DEM). It was shown that the developed model was effective way to estimate deformation-strength characteristics. Moreover, it was confirmed that the modified Soil had high earthquake resistance.
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A New Recycling System of Waste Gypsum Board Paper : Application of Waste Gypsum Board Paper for Soil Improvement
International journal of the Society of Materials Engineering for Resources, 2010Co-Authors: Hiroshi Takahashi, Hirokazu KanahamaAbstract:We have already developed a new recycling system for high water content mud such as construction sludge by using paper debris (fragments of the newspaper) to increase the recycling rate of the construction sludge. However, recently, the price of old newspaper is increasing. Therefore, development of inexpensive fiber materials are strongly desired in order to reduce the recycling cost. In this study, the applicability of waste gypsum board paper instead of paper debris was experimentally investigated. The waste gypsum board paper was crushed by the hammer mill and crushed paper was used in fiber-Cement-Stabilized-Soil method. It was found through the unconfined compression tests that the failure strength and failure strain of modified Soils by using crushed board paper are almost the same as those of modified Soils by using paper debris. That is, it was confirmed that the crushed board paper can become a substitute of paper debris.