The Experts below are selected from a list of 11361 Experts worldwide ranked by ideXlab platform
Jing Wang - One of the best experts on this subject based on the ideXlab platform.
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Study on shear strength of compacted subgrade soils by test and numerical simulation
2012Co-Authors: Han Bing Liu, Jing WangAbstract:Three different Plasticity Index subgrade soils are selected from seasonal frozen soil region. Test specimens are made under the maximum degree of compaction with optimum moisture content. Static triaxial test is executed on the specimens under different confining pressures. The results show that with the same kind of soil, the shear strength increases with confining pressure; under the same confining pressure, shear strength increases with the Plasticity Index. The relationship between shear strength and confining pressure, Plasticity Index is obtained by means of multiple nonlinear fitting and shows a good correlation. Using ABAQUS finite element software for numerical simulation, Regularity for shear strength of different Plasticity Index subgrade soil has been basically the same rules with the experiment.
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Experimental Research on Shear Strength of Subgrade Soil and Plasticity Index under Different Freeze-Thaw Cycles
Applied Mechanics and Materials, 2012Co-Authors: Jing Wang, Yi Ming XiangAbstract:Three different Plasticity Index subgrade soils are selected from seasonal frozen soil area. Triaxial compression test under different confining pressures are executed on the samples exposed to 0 to 7 times closed-system freeze-thaw cycles. The conclusion gotten is that to the same kind of soil under the same freeze-thaw cycles, the shear strength increases with confining pressure; Shear strength with the same confining pressure decreases with the number of freeze-thaw cycles; With the same confining pressure and the same freeze-thaw cycles, shear strength increases with the Plasticity Index. Exponential function is adopted for multiple nonlinear fitting on the test results. The relationship between shear strength and confining pressure, Plasticity Index, freeze-thaw cycles is obtained and shows a good correlation.
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Influence of freeze-thaw cycles on resilient modulus of different Plasticity Index subgrade soil
2011 International Conference on Remote Sensing Environment and Transportation Engineering, 2011Co-Authors: Jing WangAbstract:Three different Plasticity Index subgrade soil are selected from seasonal frozen soil region. Static triaxial test is executed on the samples exposed to 0 to 7 times closed-system freeze-thaw cycles under different confining pressures. Resilient modulus is obtained from the line segment of deviator stress-strain curve. The results show that the resilient modulus of the same kind of soil increases with confining pressure; under the same freeze-thaw cycles, Resilient modulus with the same confining pressure decreases with the number of freeze-thaw cycles; Under the same confining pressure and the same freeze-thaw cycles, resilient modulus increases with the Plasticity Index. The exponential function is adopted for multiple nonlinear fitting. The relationship between resilient modulus and confining pressure, Plasticity Index, freeze-thaw cycles is obtained and shows a good correlation.
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Correlation Analysis on Frost Heaving Ratio of Subgrade Soil and Plasticity Index under Freeze-Thaw Cycles
Advanced Materials Research, 2011Co-Authors: Han Bing Liu, Jing Wang, K. FengAbstract:Three kinds of subgrade soils with different Plasticity Index are selected from seasonally frozen soil region. Frost heaving ratio of volume and height was performed on the samples exposed to 0 to 8 times closed-system freeze-thaw cycles. The results show that concerning the same kind of soil, the frost heaving ratio increases with the number of freeze-thaw cycles; Frost heaving ratio increases with Plasticity Index under the same number of freeze-thaw cycles. Multiple nonlinear fitting is adopted for test data. The relationship between frost heaving ratio and Plasticity Index, freeze-thaw cycles is obtained and shows a good correlation. The relation can provide useful reference for subgrade design and construction in seasonally frozen soil region.
S. V. Dinesh - One of the best experts on this subject based on the ideXlab platform.
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Effect of plastic fines on initial shear modulus of sand-clay mixtures
KSCE Journal of Civil Engineering, 2017Co-Authors: B. G. Shivaprakash, S. V. DineshAbstract:This paper presents the dynamic properties of sand-fines mixtures based on the results of undrained cyclic triaxial tests. The sand was obtained from Sabarmati River, and three types of fines F1, F2, and F3 were obtained from locally available fine grained soils i.e. Black cotton soil, Suddha soil, and Bentonite soil. Sand-fines mixtures of wide range of Plasticity from non-plastic to highly plastic mixture with PI = 86 were prepared using the fines passing 75 μ size. The initial shear moduli of all sand-fines mixtures are evaluated in terms of fines content, Plasticity Index (IP) and equivalent Plasticity Index (IP*) determined for soil passing 2 mm size IS Sieve. There is good correlation between the initial shear modulus of sand-fines mixtures and equivalent Plasticity Index (IP*) compared to Plasticity Index (IP). An empirical equation for obtaining initial shear modulus is formulated based on equivalent Plasticity Index and mean-effective stress.
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Initial Shear Modulus of Remolded Sand-Clay Mixtures
Journal of Geotechnical and Geoenvironmental Engineering, 2008Co-Authors: Suguru Yamada, Masayuki Hyodo, Rolando P. Orense, S. V. DineshAbstract:This paper presents the dynamic properties of undisturbed and remolded clays and sand-clay mixtures based on the results of undrained hollow cylindrical torsional cyclic simple shear tests. The clays were obtained from different sites having a wide range of Plasticity, covering fluvial and marine sediments. The main focus of this investigation is the dynamic properties of sand-clay mixtures whose properties are intermediate between those of clays and sands. The initial shear moduli are examined in terms of fines content, and conventional Plasticity Index. An equivalent Plasticity Index has been defined in the present investigation and a better correlation is obtained between the initial shear modulus of sand-clay mixtures and this parameter than with the conventional Plasticity Index. Further, a simple method has been suggested to determine the equivalent Plasticity Index based on the conventional consistency limit tests and grain size analysis. An empirical correlation for predicting the initial shear modulus is also proposed.
Paolo Podioguidugli - One of the best experts on this subject based on the ideXlab platform.
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elastic unloading neutral loading and plastic loading in the theory of materials with elastic range
International Journal of Plasticity, 1995Co-Authors: Massimiliano Lucchesi, Paolo PodioguidugliAbstract:Abstract A Plasticity Index is an evolution indicator that allows one to predict, in a situation of potential plastic flow, whether plastic loading, instead of elastic unloading or neutral loading, will actually occur. It is shown in this article how a notion of Plasticity Index arises within the theory of materials with elastic range.
Han Bing Liu - One of the best experts on this subject based on the ideXlab platform.
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Study on shear strength of compacted subgrade soils by test and numerical simulation
2012Co-Authors: Han Bing Liu, Jing WangAbstract:Three different Plasticity Index subgrade soils are selected from seasonal frozen soil region. Test specimens are made under the maximum degree of compaction with optimum moisture content. Static triaxial test is executed on the specimens under different confining pressures. The results show that with the same kind of soil, the shear strength increases with confining pressure; under the same confining pressure, shear strength increases with the Plasticity Index. The relationship between shear strength and confining pressure, Plasticity Index is obtained by means of multiple nonlinear fitting and shows a good correlation. Using ABAQUS finite element software for numerical simulation, Regularity for shear strength of different Plasticity Index subgrade soil has been basically the same rules with the experiment.
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Correlation Analysis on Frost Heaving Ratio of Subgrade Soil and Plasticity Index under Freeze-Thaw Cycles
Advanced Materials Research, 2011Co-Authors: Han Bing Liu, Jing Wang, K. FengAbstract:Three kinds of subgrade soils with different Plasticity Index are selected from seasonally frozen soil region. Frost heaving ratio of volume and height was performed on the samples exposed to 0 to 8 times closed-system freeze-thaw cycles. The results show that concerning the same kind of soil, the frost heaving ratio increases with the number of freeze-thaw cycles; Frost heaving ratio increases with Plasticity Index under the same number of freeze-thaw cycles. Multiple nonlinear fitting is adopted for test data. The relationship between frost heaving ratio and Plasticity Index, freeze-thaw cycles is obtained and shows a good correlation. The relation can provide useful reference for subgrade design and construction in seasonally frozen soil region.
Xilan Zhi - One of the best experts on this subject based on the ideXlab platform.
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effect of repeated freeze thaw cycles on the resilient modulus for fine grained subgrade soils with low Plasticity Index
Road Materials and Pavement Design, 2018Co-Authors: Weina Wang, Yu Qin, Mingxuan Lei, Xilan ZhiAbstract:The resilient modulus of the subgrade is an important material parameter for pavement design. This paper presents an unconfined laboratory testing method for resilient modulus under repeated freeze-thaw cycles. The method was validated by a standard testing method. Specimens of three types of fine-grained subgrade soil with a low Plasticity Index with five different levels of moisture were tested by the proposed testing procedure. The size of the specimen was 50 mm in diameter and 50 mm in height to more accurately illustrate the freeze-thaw conditions. The numbers of freeze-thaw cycles were designated 0, 3, 6, 9 and 12. The results indicate that all the soils exhibited a substantially reduced resilient modulus after the first three freeze-thaw cycles. After six freeze-thaw cycles, the decrease in the resilient modulus was not obvious. The resilient modulus due to six cycles was suggested for use in pavement design. The reduction coefficients for the freeze-thaw effect were also recommended. These reducti...