Laboratory Study on the Cyclic and Postcyclic Behavior of Plastic Concrete Used in Cutoff Walls of Embankment Dams

Pisheh, Y. Pashang; Hosseini, S. Majdeddin Mir Mohammad

doi:10.1061/(asce)mt.1943-5533.0003172

Cited by 8 publications

(3 citation statements)

References 19 publications

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“…9 However, bentonite (or clay) also reduces the growth rate of concrete strength. The strength of plastic concrete still increases significantly after reaching the age of 28d, 10,11 which is quite different from that of ordinary concrete. The failure mode of plastic concrete is similar to that of normal concrete when the confining pressure is zero or lower, and the stress-strain curve has a definite peak, followed by stress softening.…”

Section: Introductionmentioning

confidence: 84%

Stress–strain behavior and constitutive relation of rubberized plastic concrete under uniaxial and triaxial compression

Feng

Chen

Liu

2023

Structural Concrete

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Plastic concrete is a kind of flexible concrete cutoff wall material, which is used to solve the problem of poor coordinated deformation ability between ordinary concrete cutoff wall and surrounding soil. It has the characteristics of small elastic modulus and large limit strain, which greatly improves the operation condition of cutoff wall. In order to save bentonite resources and recycle waste automobile tires, this paper crushed waste automobile tires into rubber particles and mixed them into plastic concrete, through the uniaxial compression test and triaxial compression test, obtained the corresponding stress–strain curve, rubberized plastic concrete strength and deformation properties are studied and the rubber particles and the relationship between dosage. The test results show that the compressive strength of rubberized plastic concrete decreases with the increase of rubber particles content, but the deformation capacity increases with the increase of rubber particles content. In this paper, the regression analysis of rubberized plastic concrete constitutive relation and failure criterion including the influence factor of rubber particles are helpful to promote the engineering application of rubberized plastic concrete and reduce the exploitation of natural resources and environmental pollution.

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Section: Introductionmentioning

confidence: 84%

Stress–strain behavior and constitutive relation of rubberized plastic concrete under uniaxial and triaxial compression

Feng

Chen

Liu

2023

Structural Concrete

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“…The failure mode of plastic concrete was largely affected by the confined pressure. Under low limiting pressure, the failure mode was the same as that of brittle materials, and there was an obvious peak strength point when the sample fails; For higher confining pressures, the specimen behaved as a ductile material [21]. Song et al [22] considered that the stress-strain curve of plastic concrete could generally be divided into four sections through a true triaxial compression stress test.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of road performance and micro-mechanism analysis of bentonite plastic concrete subgrade

Guoming,

Xiaolin,

Zenghui

et al. 2024

Mater. Res. Express

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This study evaluated the performance of bentonite plasticized concrete with good deformation coordination as a road base material, to address the poor deformation coordination of rigid base layers in roads. Through tests such as slump, strength, permeability, and scanning electron microscopy (SEM) and X-ray diffraction (XRD), the study analyzed the variations in workability, mechanical properties, and durability of plastic concrete as a base material under different bentonite and cement contents, as well as the underlying micro-mechanisms. The results showed that plastic concrete exhibited good workability, which improved with increased bentonite and cement content. The 28-day mechanical properties of the plastic concrete met the design criteria for road base layers and had features of higher load-bearing capacity, good toughness, slow strength attenuation, and overall integrity. In durability, the increase of bentonite content enhanced the concrete's permeability, but decreased abrasivenes and shrinkage. From economic, performance, and engineering perspectives, the optimal bentonite and cement contents for the plastic concrete base were in the ranges of 90kg/m3 to 120kg/m3 and 110kg/m3 to 150kg/m3, respectively.

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“…Several researches have been carried out on the mechanical behavior of plastic concrete in unconfined and triaxial compression tests through which the experimental investigations conducted by Pashang Pisheh et al [4][5][6] and Mahboubi et al [7] assessed an extensive range of various mechanical characteristics of such a main material required for construction of cut-off walls of embankment dams. It must be noted that in the current research, the mix proportions of materials suggested by Pashang Pisheh et al [4][5][6] were used with some minor revisions to perform the laboratory experiments of the study. Moreover, other researchers performed laboratory tests to evaluate the hydraulic and mechanical behavior of this material [8,9].…”

Section: Introductionmentioning

confidence: 99%

A parametric study on behavior of plastic concrete material in earth dams

Bakhtiari¹

2020

Glob. J. Eng. Tech. Adv.

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In the current research, the mechanical behavior of plastic concrete in cut-off walls of embankment dams has been investigated. To do so, several triaxial compression tests have been carried out on the specimens with various mix designs under different confining pressures. It has been observed that the compressive strength of such a material increases dramatically with the confining pressures applied on the samples. Moreover, the material behavior is substantially dependent on the confining pressure values; so that, as the confining pressure increases, the material behavior intends to be more ductile. Furthermore, a parametric study has been done to investigate the influence of mix design on these materials. The results showed that the strength and elasticity modulus of plastic concrete increase with the increase of cement factor and decrease of bentonite content. However, the rate of increase is apparently dependent on the mix design changes.

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Laboratory Study on the Cyclic and Postcyclic Behavior of Plastic Concrete Used in Cutoff Walls of Embankment Dams

Cited by 8 publications

References 19 publications

Stress–strain behavior and constitutive relation of rubberized plastic concrete under uniaxial and triaxial compression

Stress–strain behavior and constitutive relation of rubberized plastic concrete under uniaxial and triaxial compression

Evaluation of road performance and micro-mechanism analysis of bentonite plastic concrete subgrade

A parametric study on behavior of plastic concrete material in earth dams

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