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mesoscale fracture analysis of recycled aggregate concrete

mesoscale fracture analysis of recycled aggregate concrete

Mesoscale fracture analysis of recycled aggregate

Since recycled aggregate concrete (RAC) is valuable for green concrete and global sustainability, it has attracted many numerical research studies as a five‐phase material in mesolevel. In this study, the digital image processing (DIP) technique is used to obtain the real aggregate and mortar distribution of recycled concrete specimens.

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Numerical analysis of the failure of recycled aggregate ...

2020-3-1  The random effect of OM on the fracture behaviour of recycled aggregate concrete (RAC) at the mesoscopic scale has then been studied. This numerical approach explicitly takes into account an effective interphase (EI) between RA and cement mortar, which is composed of unknown OM and new forming mortar.

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Mesoscale modeling of recycled aggregate concrete

2021-1-25  The two features distinguish the mesostructure of recycled aggregate concrete (RAC) from that of natural aggregate concrete (NAC). It can be interpreted in Fig. 1 , where RAC is conceived as an eight-phase composite comprising new and old aggregates, new and old mortars, and four types of interfacial transition zones (ITZs) (i.e., ITZ-1 to ITZ-4 shown in Fig. 1 a).

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Peridynamics modeling and simulation of meso-scale ...

The representative microstructure for the recycled aggregate concrete is generated by a stochastic Monte-Carlo method and the related packing algorithm. It is basically a mesoscale model whose microstructure is represented by the shape, size, and ratio of every elements and their interface network in the recycled aggregate concrete specimen.

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Mesoscale Fracture Analysis of Multiphase

Mesoscale Fracture Analysis of Multiphase Cementitious Composites Using Peridynamics. Concrete is a complex heterogeneous material, and thus, it is important to develop numerical modeling methods to enhance the prediction accuracy of the fracture mechanism. In this study, a two-dimensional mesoscale model is developed using a non-ordinary ...

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A mesoscale fracture model for concrete - ScienceDirect

2017-7-1  Concrete is treated at the mesoscale with an explicit representation of coarse aggregates and mortar paste. The propagation and coalescence of cracks are modeled with dynamically inserted cohesive elements. Stress-strain response, dissipated fracture energy and crack evolution are compared under tensile loading at several strain rates.

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Mesoscale finite element modeling of recycled

2021-1-10  Mesoscale simulation is an effective tool to investigate the RAC’s tensile responses. •. Tensile strength of RAC is sharply affected by the relative strength of old to new mortar. •. Old mortar attached to RA always negatively affects the RAC’s elastic modulus. •.

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Peridynamics modeling and simulation of meso-scale fracture ...

2021-4-20  In this paper, we present two non-local mechanics models of recycled coarse aggregate (RCA) concrete based on peridynamics modeling and simulation, i.e. RCA model 1 and RCA model 2. The recycled coarse aggregate concrete is a heterogeneous composite that has five different phases including natural coarse aggregate, old interfacial transition zone (ITZ), old cement mortar, new ITZ,

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Structural Concrete: Vol 22, No S1

2021-2-25  Mesoscale fracture analysis of recycled aggregate concrete based on digital image processing technique. Yijiang Peng. Liping Ying. Mahmoud M. A. Kamel. Yao Wang. Pages: E33-E47. First Published: 16 February 2020. Abstract. Full text.

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北京工业大学研究生招生网--彭一江

2020-10-8  Mesoscale fracture analysis of recycled aggregate concrete based on digital image processing technique. Structural Concrete, 2020, 1–15.(SCI) Yao Wang, Yijiang Peng(通讯作者), Mahmoud M.A. Kamel,...

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Mesoscale Modelling of Concrete with Recycled Aggregates

Mesoscale Modelling of Concrete with Recycled Aggregates ... material, which is investigated at a mesoscale level, i.e. distinguishing concrete into its single components: matrix (cement paste ...

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Structural Concrete: Vol 22, No S1

2021-2-25  Mesoscale fracture analysis of recycled aggregate concrete based on digital image processing technique Yijiang Peng , Liping Ying , Mahmoud M. A. Kamel , Yao Wang , Pages: E33-E47

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Mesoscale Fracture Analysis of Multiphase

Concrete is a complex heterogeneous material, and thus, it is important to develop numerical modeling methods to enhance the prediction accuracy of the fracture mechanism. In this study, a two-dimensional mesoscale model is developed using a non-ordinary state-based peridynamic (NOSBPD) method. Frac

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Peridynamics modeling and simulation of meso-scale fracture ...

2021-4-20  In this paper, we present two non-local mechanics models of recycled coarse aggregate (RCA) concrete based on peridynamics modeling and simulation, i.e. RCA model 1 and RCA model 2. The recycled coarse aggregate concrete is a heterogeneous composite that has five different phases including natural coarse aggregate, old interfacial transition zone (ITZ), old cement mortar, new ITZ,

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Mesoscale Analysis of Stress Distribution along ITZs in ...

Recycled aggregate concrete (RAC) has attracted tremendous attention from engineering practice and academic research throughout the world as an effective way to resolve the problems caused by the construction and demolition waste.

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Concrete mode-I mesoscale fracture model and its ...

At mesoscale, the fracture crack could be regarded as the combination of mortar crack, bond crack and aggregate crack. This paper establishes a mode-I mesoscale fracture model for concrete which could take both intergranular and transgranular crack pattern into consideration based on mesomechanics and fracture mechanics.

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Mesoscale modeling of concrete: Geometry and

Mesoscale analysis is a promising discipline for concrete mix design and damage prediction. Besides many other aspects, its success crucially depends on accurate modeling of the mesoscale geometry and efficient numerical analysis of high resolution, to both of which this article contributes.

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A mesoscale model based on Monte-Carlo method

2012-10-12  An aggregate generation and packing algorithm based on Monte-Carlo method is developed to express the aggregate random distribution in cement concrete. A mesoscale model is proposed on the basis of the algorithm. In this model, the concrete consists of three parts, namely coarse aggregate, cement matrix and the interfacial transition zone (ITZ) between them.

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Mahmoud Kamel - Beijing University of Technology - 中国 ...

Mesoscale fracture analysis of recycled aggregate concrete based on digital image processing technique Structural Concrete Journal of fib 2020 年 1 月 30 日 Since recycled aggregate concrete (RAC) is valuable for green concrete and global sustainability, it has attracted many numerical research studies as a five‐phase material in mesolevel.

get price

Recycled aggregate concrete performance analysis

2019-1-31  Multimedia technology has important practical significance and broad application prospects for promoting the development of the industry. In this paper, digital image processing multimedia technology is applied in the research of recycled aggregate concrete performance, which proposes a new research method to study the performance of recycled aggregate concrete.

get price

Mesoscale Fracture Analysis of Multiphase

Concrete is a complex heterogeneous material, and thus, it is important to develop numerical modeling methods to enhance the prediction accuracy of the fracture mechanism. In this study, a two-dimensional mesoscale model is developed using a non-ordinary state-based peridynamic (NOSBPD) method. Frac

get price

Concrete mode-I mesoscale fracture model and its ...

At mesoscale, the fracture crack could be regarded as the combination of mortar crack, bond crack and aggregate crack. This paper establishes a mode-I mesoscale fracture model for concrete which could take both intergranular and transgranular crack pattern into consideration based on mesomechanics and fracture mechanics.

get price

Mesoscale Analysis of Stress Distribution along ITZs in ...

Mesoscale Analysis of Stress Distribution along ITZs in Recycled Concrete with Variously Shaped Aggregates under Uniaxial Compression. Recycled aggregate concrete (RAC) has attracted tremendous attention from engineering practice and academic research throughout the world as an effective way to resolve the problems caused by the construction and demolition waste.

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A mesoscale model based on Monte-Carlo method

2012-10-12  An aggregate generation and packing algorithm based on Monte-Carlo method is developed to express the aggregate random distribution in cement concrete. A mesoscale model is proposed on the basis of the algorithm. In this model, the concrete consists of three parts, namely coarse aggregate, cement matrix and the interfacial transition zone (ITZ) between them.

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Discrete Element Mesoscale Modeling of Recycled

The samples in Case II were recycled lump concrete, and the strengths of the new and old concrete were both set at 45.29 MPa (again, this implies that the new and old concretes adopt the mesoscale parameters of the concrete with the strength of 45.29 MPa in Table 5), the same as in Case I. The replacement ratio of DCLs in Case II was 33%.

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3D Mesoscale Finite Element Modelling of Concrete

2020-10-15  numerical analysis of fracture in a Finite Element context [1]. This work addresses the mechanical behavior of concrete in a 3D mesoscale finite element model. Softening behavior is represented di erently in compression and tension. It proposes to combine damage plasticity to account for compressive softening behavior and interface cohesive ...

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Mahmoud Kamel - Beijing University of Technology - 中国 ...

Mesoscale fracture analysis of recycled aggregate concrete based on digital image processing technique Structural Concrete Journal of fib 2020 年 1 月 30 日 Since recycled aggregate concrete (RAC) is valuable for green concrete and global sustainability, it has attracted many numerical research studies as a five‐phase material in mesolevel.

get price

Recycled aggregate concrete performance analysis

2019-1-31  Multimedia technology has important practical significance and broad application prospects for promoting the development of the industry. In this paper, digital image processing multimedia technology is applied in the research of recycled aggregate concrete performance, which proposes a new research method to study the performance of recycled aggregate concrete.

get price

胡守旺-东莞理工学院 - 生态环境与建筑工程学院 - dgut.cn

2021-7-14  Mesoscale finite element modeling of recycled aggregate concrete under axial tension. Construction and Building Materials. [7] 胡守旺 , 彭建新 , 张建仁 , 涂光亚 , 钢管混凝土拱桥核心混凝土徐变效应可靠度分析 , 中国公路学报 , 2017, 30(03):183-190.

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【成果分享】细观混凝土多尺度数值仿真:概述之建模方法篇

[7] Huang Y J, Yan D M, Yang Z J, Liu G H. 2D and 3D homogenization and fracture analysis of concrete based on in-situ X-ray Computed Tomography images and Monte Carlo simulations[J]. Engineering Fracture Mechanics, 2016, 163: 37-54.

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