Mesoscale modeling of recycled aggregate concrete under uniaxial compression and tension using discrete element method

Yong, Yu; Zheng, Yu; Zhao, Xinyu

doi:10.1016/j.conbuildmat.2020.121116

Cited by 66 publications

(30 citation statements)

References 40 publications

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“…The 2D mesostructure model with dimensions was adopted. The aggregates decomposed into two dimensions follow the classic Walraven function [4]:…”

Section: Aggregates and Fibersmentioning

confidence: 99%

See 1 more Smart Citation

Mesoscale Modeling of Hooked-End Steel Fiber Reinforced Concrete under Uniaxial Compression Using Cohesive Elements

Feng¹,

Yin²,

Li³

et al. 2021

JAMP

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“…The 2D mesostructure model with dimensions was adopted. The aggregates decomposed into two dimensions follow the classic Walraven function [4]:…”

Section: Aggregates and Fibersmentioning

confidence: 99%

“…presents the area proportion of aggregates with a particle diameter smaller than D 0 ; P k denotes the percentage of the total area of aggregates to the quadrilateral area (about 75% [4]); D max is the maximum size of aggregates. Table 1 lists the aggregate size distribution in mesoscale models.…”

Section: Aggregates and Fibersmentioning

confidence: 99%

Mesoscale Modeling of Hooked-End Steel Fiber Reinforced Concrete under Uniaxial Compression Using Cohesive Elements

Feng¹,

Yin²,

Li³

et al. 2021

JAMP

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“…The same method could be used to simulate the whole stress-strain softening curve of RAC material. Yu et al [18] used finite element and discrete element methods to simulate the uniaxial compression process of recycled concrete while also analyzing adhered mortar content and other variables. Reused concrete components by Raza et al [19,20] used the finite element method on FRP-Reinforced Concrete Structures.…”

Section: Introductionmentioning

confidence: 99%

Finite Element Analysis on the Uniaxial Compressive Behavior of Concrete with Large-Size Recycled Coarse Aggregate

Tan¹,

Singh²

2022

Journal of Renewable Materials

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To model the concrete with complex internal structure of concrete with large sized aggregates the effect of internal structure on uniaxial compression behavior are studied. Large-sized recycled aggregates behave differently in the concrete matrix. To understand the influence on concrete matrix, a finite element model was developed to model recycled aggregate concrete composed of multiple randomly distributed irregular aggregates and cement mortar. The model was used to calculate the effect of large-size recycled coarse aggregate (LRCA) on the strength of recycled aggregate concrete and simulate the compressive strength of cubes and prisms. The factors such as the strength of new concrete, the strength of old concrete, the defective element content, the shape of LRCA, the incorporation ratio of LRCA and the size of LRCA that can affect the strength of concrete are analyzed in this paper. Results showed that the influence of various factors on concrete strength are in the following desending order: (i) strength of newly poured concrete; (ii) original strength of recycled aggregates; and (iii) defects. It can be seen that the cracking of the phase material elements starts along the bonding zones between gravel and mortar or the new and old mortar, then spreads to mortar and finally to LRCA. The cracking tendency is most significant in LRCA, which means that the fracturing is related to the fracture of the LRCA. After evaluating the variations in strength and quality of the recycled concrete, the influences on concrete strength and quality were studied. The results showed that the proposed concrete model with LRCA was successfully applied to studying the uniaxial compressive behavior of concrete with large-size recycled coarse aggregate.

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“…Ying et al [15] employed the three-dimensional base force element technique (BFEM) to simulate the uniaxial compression test of recycled concrete, and the results demonstrated that the method could accurately represent the nonlinear deformation of RAC. Yu et al [16] analyzed the compression failure of recycled concrete using the discrete element approach. The material qualities of aggregate, recycled aggregate, mortar, aggregate damage, and ancient mortar content were examined.…”

Section: Introductionmentioning

confidence: 99%

Discrete Element Simulation Analysis of Biaxial Mechanical Properties of Concrete with Large-Size Recycled Aggregate

Tan

Xiao

2021

Sustainability

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Concrete made with large-size recycled aggregates is a new kind of recycled concrete, where the size of the recycled aggregate used is 25–80 mm, which is generally three times that of conventional aggregate. Thus, its composition and mechanical properties are different from that of conventional recycled concrete and can be applied in large-volume structures. In this study, recycled aggregate generated in two stages with randomly distributed gravels and mortar was used to replace the conventional recycled aggregate model, to observe the internal stress state and cracking of the large-size recycled aggregate. This paper also investigated the mechanical properties, such as the compressive strength, crack morphology, and stress–strain curve, of concrete with large-size recycled aggregates under different confining pressures and recycled aggregate incorporation ratios. Through this research, it was found that when compared with conventional concrete, under the confining pressure, the strength of large-size recycled aggregate concrete did not decrease significantly at the same stress state, moreover, the stiffness was increased. Confining pressure has a significant influence on the strength of large-size recycled aggregate cocrete.

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Mesoscale modeling of recycled aggregate concrete under uniaxial compression and tension using discrete element method

Cited by 66 publications

References 40 publications

Mesoscale Modeling of Hooked-End Steel Fiber Reinforced Concrete under Uniaxial Compression Using Cohesive Elements

Mesoscale Modeling of Hooked-End Steel Fiber Reinforced Concrete under Uniaxial Compression Using Cohesive Elements

Finite Element Analysis on the Uniaxial Compressive Behavior of Concrete with Large-Size Recycled Coarse Aggregate

Discrete Element Simulation Analysis of Biaxial Mechanical Properties of Concrete with Large-Size Recycled Aggregate

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