Failure Process of Modeled Recycled Aggregate Concrete

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Failure Process of Modeled Recycled Aggregate Concrete ...

This paper investigates the failure processes of recycled aggregate concrete by a model test and numerical simulations. A micromechanical numerical modeling approach to simulate the progressive cracking behavior of the modeled recycled aggregate concrete, considering its actual meso-structures, is established based on the discrete element method (DEM).

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Failure processes of modeled recycled aggregate concrete ...

Nov 01, 2012  Modeled cement-based materials were designed to investigate the failure processes of natural aggregate concrete and recycled aggregate concrete under uniaxial compression. The related conclusions are summarized as follows: (1) Compared to MNAC, MRAC and MCAC presented lower elastic moduli and compressive strength.

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Failure processes of modeled recycled aggregate concrete ...

In order to investigate the failure processes of Recycled Aggregate Concrete (RAC), cracking behavior of modeled RAC specimens under compressive loading was investigated using Digital Image Correlation (DIC). Strain and displacement contour maps were produced to analyze the cracks’ initiation and propagation during loading.

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Failure processes of modeled recycled aggregate concrete ...

In order to investigate the failure processes of Recycled Aggregate Concrete (RAC), cracking behavior of modeled RAC specimens under compressive loading was investigated using Digital Image Correlation (DIC). Strain and displacement contour maps were produced to analyze the cracks' initiation and propagation during loading.

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Failure Process of Modeled Recycled Aggregate Concrete ...

adshelp[at]cfa.harvard The ADS is operated by the Smithsonian Astrophysical Observatory under NASA Cooperative Agreement NNX16AC86A

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Experimental study on failure mechanism of modeled ...

Experimental study on failure mechanism of modeled recycled aggregate concrete under uniaxial compression. Wengui Li *, Jianzhuang Xiao, Weijian Yi, Surendra P Shah ... an in-depth analysis was carried out on the whole failure process to reveal the failure mechanism and the crack evolution of recycled aggregate concrete.",

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Numerical Discrete-Element Method Investigation on Failure ...

Jan 01, 2019  The initiation, propagation, and coalescence of microcracks and subsequent nonlinear deformation behaviors of cement mortar, modeled natural aggregate, and recycled aggregate concrete are captured through DEM numerical simulations and

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Failure processes of modeled recycled aggregate concrete ...

Li et al. (2012b) investigated the failure mechanism and cracking process of modeled recycled aggregate concrete (MRAC) using a digital image correlation (DIC) technique, and the results showed ...

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Experimental study on failure mechanism of modeled ...

Experimental study on failure mechanism of modeled recycled aggregate concrete under uniaxial compression. Wengui Li *, Jianzhuang Xiao, Weijian Yi, Surendra P Shah ... an in-depth analysis was carried out on the whole failure process to reveal the failure mechanism and the crack evolution of recycled aggregate concrete.",

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Numeral modeling of fracture failure of recycled aggregate ...

the numerical model did not agree very well with test data. This is due to the fact that the maximum forces of RAC notched beams exhibited size effect, which was not considered in the fracture criteria adopted in ABAQUSR and not in the two new material models. This will be a topic for future research. Keywords Recycled aggregate concrete ...

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Failure Process of Recycled Concrete Aggregate Mortars ...

Mar 31, 2017  Apedo K.L., Braymand S., Hoerd F., Feugeas F., Fond C. (2017) Failure Process of Recycled Concrete Aggregate Mortars Based on Digital Image Correlation. In: Sutton M., Reu P. (eds) International Digital Imaging Correlation Society. Conference Proceedings of the Society for Experimental Mechanics Series.

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Modeling the Failure Pattern of Prenotched Recycled ...

Feb 08, 2021  The reuse of recycled aggregate concrete (RAC) is being researched all over the world and lots of works are focused on the notched specimen to study the crack path of RAC. A mathematical algorithm of RAC meshing was presented to explore the failure pattern in RAC. According to this algorithm, the interfacial transition zone can be defined to be an actual thickness at the micron level.

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Crack Propagation and Failure Characteristics of Modeled ...

Dec 09, 2020  Abstract: The failure characteristics of recycled concrete containing brick aggregates are still indistinct, especially how the angular aggregates effect the crack propagation. Based on the concept of modeled concrete, the development of cracks in concrete containing the natural aggregate and brick aggregate under a compression loading was studied.

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Micromechanical Numerical Modelling on Compressive Failure ...

This paper investigates the failure processes of recycled aggregate concrete by a model test and numerical simulations. A micromechanical numerical modeling approach to simulate the progressive cracking behavior of the modeled recycled aggregate concrete, considering its actual meso-structures, is established based on the discrete element method (DEM).

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Numerical discrete-element method investigation on failure ...

RAC is modeled by a combination of rigid Voronoi blocks cemented to each other using contacts for interfaces. The determination procedure of contact microparameters is analyzed, and a series of microscopic contact parameters in different components of modeled recycled aggregate concrete (MRAC) is calibrated using nanoindentation results.

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10.1016/j.cemconcomp.2012.06.017 DeepDyve

Jun 11, 2020  Among different modeling approaches, using modeled concrete was found to be effective to study the cracking process in concrete. Modeled concrete is a concrete model, which uses aggregates in particular shape and sizes to assist studying the complex behavior of concrete under loading, e.g. crack initiation and propagation.

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Mesoscale fracture analysis of recycled aggregate concrete ...

Feb 16, 2020  Based on the base force element method (BFEM), a mesomechanical model is constructed to simulate the uniaxial tension and compression tests of recycled concrete specimens subjected to displacement loads. The damage and the cracking mechanisms of RAC are analyzed in the mesolevel. Moreover, the failure process and the failure mode are investigated.

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Effects of Recycled Aggregate Replacement Rate on ...

A meso-analysis method which is derived from the base force element method (BFEM) was proposed for recycled aggregate concrete (RAC). A simple algorithm was used to generate the convex recycled concrete aggregate (RCA) model. Uniaxial compression numerical simulations were carried out on the numerical specimens with different replacement rates of RCA.

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Crack propagation in recycled aggregate concrete under ...

N2 - In this study, systematic experimental research was carried out to investigate the crack propagation of modeled recycled aggregate concrete (MRAC) and recycled aggregate concrete (RAC) under uniaxial compressive loading.

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1. Introduction

Xiao et al. [16] reported that the Weibull model could accurately describe the damage variation for the recycled concrete under sulfate attack and freeze-thaw cycles. Dong et al. [17] described the freeze-thaw damage process for the lightweight aggregate concrete using an improved Weibull two-parameter probability model. However, there have ...

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Recycled aggregate concrete: Localized failure assessment ...

evaluation of the sensitivity of the concrete material failure form with the content of recycled aggregates. The results in this paper demonstrate the capabilities of the proposed model to reproduce failure behaviors of RAC under arbitrary stress states recycled aggregate contents. The localization analyses demonstrate,

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Modeling recycled aggregate concrete crack by extended ...

are employed to predict the failure of recycled aggregate concrete. The recycled aggregate concrete was modeled based on a realistic concrete model with randomly distributed recycled aggregates. The arbitrary shapes of aggregates, and the new and old interfacial transition

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Effects of nano-particles on failure process and ...

Effects of nano-particles on failure process and microstructural properties of recycled aggregate concrete. Wengui Li, Chu Long, Vivian W. Y. Tam, Chi-Sun Poon, Wen Hui Duan. Civil Engineering; Research output: Contribution to journal › Article › Research › peer-review.

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Mesoscale fracture analysis of recycled aggregate concrete ...

Feb 16, 2020  Based on the base force element method (BFEM), a mesomechanical model is constructed to simulate the uniaxial tension and compression tests of recycled concrete specimens subjected to displacement loads. The damage and the cracking mechanisms of RAC are analyzed in the mesolevel. Moreover, the failure process and the failure mode are investigated.

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(DOC) AN INTRODUCTION TO RECYCLED AGGREGATE CONCRETE ...

2.2 Process of Making Recycled Aggregate Concrete Steps involved in recycled aggregate concrete:- Crushing Pre-sizing Sorting Screening Contaminant elimination Production Sequence of RAC:- 1) Crushing and screening systems start with primary jaws, cones and/or large impactor taking rubble from 30 inches to 4 feet.

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Aggregate Concrete Based on a 3D Model - MDPI

Jan 12, 2020  Wang et al. [7] proposed a convex aggregate to model crushed stone based on a round aggregate. Wriggers et al. [19] and Chen et al. [20] proposed a 3D geometrical model for NAC according to the random mesostructure of natural aggregates in a specimen. These natural aggregate models have provided e ective reference methods to simulate recycled ...

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Concrete with Recycled Aggregates from CDW

Jan 26, 2021  ity. Consequently, recycled aggregate concrete generally exhibits lower mechanical and durability-related properties than natural aggregate concrete. Most researchers conclude that the mechanical properties, such as compressive and tensile strengths and Young’s modulus, of concrete with RA from several CDW streams such as mixed CDW [10–13],

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Numerical and experimental studies on fracture process of ...

Mar 14, 2012  In this paper, an improved lattice model of heterogeneous cohesive frictional solids is developed to simulate the fracture process of recycled concrete under tensile and compressive loadings. In this numerical simulation, the recycled concrete is considered as a composite material of five phases, including natural aggregates, old hardened ...

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Influence of amount of recycled coarse aggregates and ...

Influence of amount of recycled coarse aggregates and production process on properties of recycled aggregate concrete M. Etxeberria⁎, E. Vázquez, A. Marí, M. Barra Universitat Politécnica de Catalunya (UPC), Department of Construction Engineering, Faculty of Civil Engineering, 08034 Barcelona, Spain

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‪Wengui Li‬ - ‪Google Scholar‬

Effects of nano-particles on failure process and microstructural properties of recycled aggregate concrete. W Li, C Long, VWY Tam, CS Poon, WH Duan. Construction and Building Materials 142, 42-50. , 2017. 101. 2017. Effects of nanoparticle on the dynamic behaviors of recycled aggregate concrete under impact loading.

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Numerical Simulation of Recycled Concrete Using Convex ...

By using the Base Force Element Method (BFEM) on potential energy principle, a new numerical concrete model, random convex aggregate model, is presented in this paper to simulate the experiment under uniaxial compression for recycled aggregate concrete (RAC) which can also be referred to as recycled concrete. This model is considered as a heterogeneous composite which is

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Effects of Recycled Aggregate Replacement Rate on ...

A meso-analysis method which is derived from the base force element method (BFEM) was proposed for recycled aggregate concrete (RAC). A simple algorithm was used to generate the convex recycled concrete aggregate (RCA) model. Uniaxial compression numerical simulations were carried out on the numerical specimens with different replacement rates of RCA.

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Recycled Aggregate Concrete Scientific.Net

Abstract: This study also investigates the effectiveness of multiple surface modification of recycled concrete aggregate (RCA) with respect to mechanical properties of the resultant recycled aggregate concrete (RAC) when exposed to various curing conditions, namely, normal water (N w) and seawater (S w).The properties included compressive and flexural strength and impact resistance.

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Crack propagation in recycled aggregate concrete under ...

Jul 01, 2012  In this study, systematic experimental research was carried out to investigate the crack propagation of modeled recycled aggregate concrete (MRAC) and recycled aggregate concrete (RAC) under uniaxial compressive loading.

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