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Asuri Sridharan - One of the best experts on this subject based on the ideXlab platform.
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Static Compaction Characteristics of Coarse and Fine Grained Soils
Solving Pavement and Construction Materials Problems with Innovative and Cutting-edge Technologies, 2018Co-Authors: Binu Sharma, Biplab Gogoi, Asuri SridharanAbstract:The modified Proctor’s Test, the reduced modified Proctor’s Test, the Standard Proctor’s Test and the reduced Standard Proctor’s Test are dynamic methods which are often used in the laboratory to ascertain the compaction characteristics of soils at different energy levels. To perform these Tests considerable time and effort are needed. A laboratory procedure is devised to determine the relationships between moisture content and dry unit weight by using static compaction method for different static pressures. The static compaction pressure Test is performed in the Proctor mould to statically compact the soil at different moisture contents. This method is less laborious and the time involved is less. An attempt was made to predict the compaction characteristics by static compaction method and parabolic curves were obtained between moisture content versus dry unit weight at different static pressures. The static pressure equivalent to the Standard energy input of a Standard Proctor Test to obtain the Proctor’s optimum moisture content (OMC) and maximum dry unit weight (MDUW) was determined for fine grained soil. The main objective of present study is to determine the static compaction characteristics of both coarse and fine grained soils and compare it with that of the dynamic compaction characteristics at different compactive efforts. For this, eleven different soil samples of classification CI, CH, SC, SP and SM were Tested. The analysis shows that the relation between moisture content and dry unit weight in static compaction for different static pressure is parabolic in nature for CI & CH class of soil. For SP class of soil, both the static and dynamic compaction curves show an undulatory pattern with maximum dry unit weight near dry and towards saturated condition. The dynamic compaction curve for both SC and SM class of soil is parabolic in nature. For SM class of soil, static compaction curve show a wavy pattern with maximum dry unit weight at dry and near saturated condition whereas for SC class of soil only one sided compaction part of the curve for the rising portion of the dry of optimum side was generated. In case of coarse grained soils, an equivalent static pressure, at which maximum dry unit weight at optimum moisture content can be obtained corresponding to different dynamic efforts, could not be determined as that of fine grained soils. Further, the static pressure—dry unit weight relationship for a particular moisture content was identified as a rectangular hyperbola.
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Static Method to Determine Compaction Characteristics of Fine-Grained Soils
Geotechnical Testing Journal, 2016Co-Authors: Binu Sharma, Asuri Sridharan, P.h. TalukdarAbstract:Engineering projects such as roads, earthen dams, embankments, and trench backfills require soil compacted at higher dry unit weight. In a majority of geotechnical projects, compaction of soils is involved with increasing strength and decreasing compressibility and permeability. The Proctor compaction Test forms one of the most popular and important Tests in geotechnical engineering practice. The moisture content-dry unit weight relationship of the soil obtained from the Standard Proctor Test forms the basis for specification and field compaction control. Standard Proctor Test, also known as the dynamic compaction Test requires considerable time and effort and has few imperfections. This study examined the possibility of determining the equivalent static pressure to the Standard Proctor Test to obtain the optimum moisture content, OMC, and maximum dry unit weight, of fine-grained soils. For this, a static compaction pressure Test was devised in the Proctor mold itself to statically compact the soil at different water contents. The equivalent static pressure so determined will simplify the compaction procedure and will also result in considerable saving of time, money, and effort, especially so when dealing with highway and earth embankment projects.
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Prediction of Compaction Behaviour of Soils at Different Energy Levels
Uluslararası Muhendislik Arastirma ve Gelistirme Dergisi, 2015Co-Authors: Yesim Gurtug, Asuri SridharanAbstract:Compaction Tests forms one of the important aspects in geotechnical engineering practice. These Tests are time consuming and require large quantity of soil also. In this paper based on the results of the compaction Tests carried out for different soils of varying plasticity characteristics at different compaction energies and on published data, it has been brought that there is a good correlation between the optimum moisture content and plastic limit for the . In addition to this one can predict the modified compaction parameters just knowing the plastic limit of the soil. For the present investigation, three different soils from North Cyprus (Tuzla, Degirmenlik and Akdeniz) and a soil from Turkey (highly plastic montmorillonitic clay) were chosen. These soils are heavily in use for civil engineering activities like construction of pavements, embankments and earth retaining structures. Compaction Tests were carried out at three different energy levels for the four soils described.. They are Standard Proctor Test (SP), reduced modified Proctor (RMP) and modified Proctor (MP). For the Standard Proctor, the compaction energy works out to be 593.7 kJ/m 3 . In the modified Proctor Test, the compaction energy works out to be 2693.3 kJ/m 3 . In the reduced modified Proctor Test the procedure is same as modified Proctor except the number of layers are three instead of five. The compaction energy works out to be 1616 kJ/m 3 . [1] Based on the experimental results obtained for maximum dry density vs. optimum moisture content for the four different soils with different compaction energy levels it has been found that irrespective of soil type and compaction energy levels both the maximum dry density and optimum moisture content are linearly related with a very high correlation coefficient of R= 0.994. Results obtained from laboratory Tests as well as from literature show that the correlation between maximum dry density and OMC for different soils, compacted for two compaction energy levels is very good. It is thus seen that one can predict OMC knowing the plastic limit with reasonable accuracy. Having obtained OMC one can get the maximum dry density from equation(1) obtained in this study. From experimental results it has been found that both OMC and maximum dry density of Proctor’s Test results and that of modified Proctor’s Test results of authors’ as well as data collected from literature correlate very well. It is seen that the correlation is highly satisfactory. Having obtained both OMC and maximum dry density for Proctor’s energy level one can get the OMC and maximum dry density for modified Proctor condition also.
Binu Sharma - One of the best experts on this subject based on the ideXlab platform.
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Static Compaction Characteristics of Coarse and Fine Grained Soils
Solving Pavement and Construction Materials Problems with Innovative and Cutting-edge Technologies, 2018Co-Authors: Binu Sharma, Biplab Gogoi, Asuri SridharanAbstract:The modified Proctor’s Test, the reduced modified Proctor’s Test, the Standard Proctor’s Test and the reduced Standard Proctor’s Test are dynamic methods which are often used in the laboratory to ascertain the compaction characteristics of soils at different energy levels. To perform these Tests considerable time and effort are needed. A laboratory procedure is devised to determine the relationships between moisture content and dry unit weight by using static compaction method for different static pressures. The static compaction pressure Test is performed in the Proctor mould to statically compact the soil at different moisture contents. This method is less laborious and the time involved is less. An attempt was made to predict the compaction characteristics by static compaction method and parabolic curves were obtained between moisture content versus dry unit weight at different static pressures. The static pressure equivalent to the Standard energy input of a Standard Proctor Test to obtain the Proctor’s optimum moisture content (OMC) and maximum dry unit weight (MDUW) was determined for fine grained soil. The main objective of present study is to determine the static compaction characteristics of both coarse and fine grained soils and compare it with that of the dynamic compaction characteristics at different compactive efforts. For this, eleven different soil samples of classification CI, CH, SC, SP and SM were Tested. The analysis shows that the relation between moisture content and dry unit weight in static compaction for different static pressure is parabolic in nature for CI & CH class of soil. For SP class of soil, both the static and dynamic compaction curves show an undulatory pattern with maximum dry unit weight near dry and towards saturated condition. The dynamic compaction curve for both SC and SM class of soil is parabolic in nature. For SM class of soil, static compaction curve show a wavy pattern with maximum dry unit weight at dry and near saturated condition whereas for SC class of soil only one sided compaction part of the curve for the rising portion of the dry of optimum side was generated. In case of coarse grained soils, an equivalent static pressure, at which maximum dry unit weight at optimum moisture content can be obtained corresponding to different dynamic efforts, could not be determined as that of fine grained soils. Further, the static pressure—dry unit weight relationship for a particular moisture content was identified as a rectangular hyperbola.
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Static Compaction Test and Determination of Equivalent Static Pressure
Lecture Notes in Civil Engineering, 2018Co-Authors: Binu Sharma, Animesh DekaAbstract:Soil compaction is a vital part of the construction process. The compaction curve between moisture content and dry unit weight should be prepared for all types of soil in the project area, before earthwork commences as it forms the basis for specification and field compaction control. The relationship between moisture content and dry unit weight of the soil is a function of the compactive effort. The modified Proctor Test, the reduced modified Proctor Test, the Standard Proctor Test and the reduced Standard Proctor Test are dynamic methods which use different compactive efforts. These Tests require considerable time and effort, and also these have some imperfections. In the present study, a laboratory procedure is devised to determine the relationships between moisture content and dry unit weight by using static compaction method for different static pressures. The static compaction pressure Test is devised in the Proctor mould itself to statically compact the soil at different water contents. This method is less laborious, and the time involved is less. For this, seven fine-grained soil samples of various plasticity characteristics were Tested. The analysis shows that the relation between water content and dry unit weight in static compaction for different static pressure is parabolic in nature. In this study, the equivalent static pressures to the modified Proctor Test, the reduced modified Proctor Test, the Standard Proctor Test and the reduced Standard Proctor Test are determined, to obtain the maximum dry unit weight and the optimum water content corresponding to the four different compactive efforts.
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Static Method to Determine Compaction Characteristics of Fine-Grained Soils
Geotechnical Testing Journal, 2016Co-Authors: Binu Sharma, Asuri Sridharan, P.h. TalukdarAbstract:Engineering projects such as roads, earthen dams, embankments, and trench backfills require soil compacted at higher dry unit weight. In a majority of geotechnical projects, compaction of soils is involved with increasing strength and decreasing compressibility and permeability. The Proctor compaction Test forms one of the most popular and important Tests in geotechnical engineering practice. The moisture content-dry unit weight relationship of the soil obtained from the Standard Proctor Test forms the basis for specification and field compaction control. Standard Proctor Test, also known as the dynamic compaction Test requires considerable time and effort and has few imperfections. This study examined the possibility of determining the equivalent static pressure to the Standard Proctor Test to obtain the optimum moisture content, OMC, and maximum dry unit weight, of fine-grained soils. For this, a static compaction pressure Test was devised in the Proctor mold itself to statically compact the soil at different water contents. The equivalent static pressure so determined will simplify the compaction procedure and will also result in considerable saving of time, money, and effort, especially so when dealing with highway and earth embankment projects.
Neyli - One of the best experts on this subject based on the ideXlab platform.
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Influence of Afşin-Elbistan highly limy fly ash on engineering behavior of a cohesive soil
Scientific Research and Essays, 2010Co-Authors: Hakan Guuml, NeyliAbstract:The study was aimed to evaluate effectiveness of utilizing a self-cementing fly ash derived from combustion of lignite at Afsin Elbistan thermal power plant in stabilizing a fine grained clayey soil (CL). Grain size and Atterberg limits analysis, compaction and triaxial compression Tests were carried out on the clayey soil samples (pure soil) and also the samples of soil mixtures added various percentage of fly ash were prepared. The samples were used for triaxial compression Test at optimum moisture contents determined by Standard Proctor Test. The Test results revealed denote that the shear strength of soil increases considerably with both addition of fly ash and curing time. Furthermore, the fly ash treatment and curing process brings also soil in more granular nature due to flocculation of the clay particles by cementation. It is clearly seen that Afsin Elbistan power plant fly ash is a very suitable material for improving of fine grained cohesive soils. Furthermore, utilization of Afsin Elbistan fly ash in soil stabilization was determined a positive influence on the environment and the economy. Key words: Fly ash, cohesive soil, shear strength, soil stabilization.
Hakan Güneyli - One of the best experts on this subject based on the ideXlab platform.
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Influence of Afin-Elbistan highly limy fly ash on engineering behavior of a cohesive soil
2020Co-Authors: Hakan GüneyliAbstract:The study was aimed to evaluate effectiveness of utilizing a self-cementing fly ash derived from combustion of lignite at Afin Elbistan thermal power plant in stabilizing a fine grained clayey soil (CL). Grain size and Atterberg limits analysis, compaction and triaxial compression Tests were carried out on the clayey soil samples (pure soil) and also the samples of soil mixtures added various percentage of fly ash were prepared. The samples were used for triaxial compression Test at optimum moisture contents determined by Standard Proctor Test. The Test results revealed denote that the shear strength of soil increases considerably with both addition of fly ash and curing time. Furthermore, the fly ash treatment and curing process brings also soil in more granular nature due to flocculation of the clay particles by cementation. It is clearly seen that Afin Elbistan power plant fly ash is a very suitable material for improving of fine grained cohesive soils. Furthermore, utilization of Afin Elbistan fly ash in soil stabilization was determined a positive influence on the environment and the economy.
P.h. Talukdar - One of the best experts on this subject based on the ideXlab platform.
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Static Method to Determine Compaction Characteristics of Fine-Grained Soils
Geotechnical Testing Journal, 2016Co-Authors: Binu Sharma, Asuri Sridharan, P.h. TalukdarAbstract:Engineering projects such as roads, earthen dams, embankments, and trench backfills require soil compacted at higher dry unit weight. In a majority of geotechnical projects, compaction of soils is involved with increasing strength and decreasing compressibility and permeability. The Proctor compaction Test forms one of the most popular and important Tests in geotechnical engineering practice. The moisture content-dry unit weight relationship of the soil obtained from the Standard Proctor Test forms the basis for specification and field compaction control. Standard Proctor Test, also known as the dynamic compaction Test requires considerable time and effort and has few imperfections. This study examined the possibility of determining the equivalent static pressure to the Standard Proctor Test to obtain the optimum moisture content, OMC, and maximum dry unit weight, of fine-grained soils. For this, a static compaction pressure Test was devised in the Proctor mold itself to statically compact the soil at different water contents. The equivalent static pressure so determined will simplify the compaction procedure and will also result in considerable saving of time, money, and effort, especially so when dealing with highway and earth embankment projects.