failure process of modeled recycled aggregate concrete

specializing in the production of large, medium and small concrete mixers, concrete mixing stations, stabilized soil mixing stations and other equipment. It is a heavy industry enterprise integrating R & production and sales.

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).

Get PriceEmail Inquiry

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.

Get PriceEmail Inquiry

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.

Get PriceEmail Inquiry

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.

Get PriceEmail Inquiry

Failure Process of Modeled Recycled Aggregate Concrete ...

Sep 01, 2020  adshelp[at]cfa.harvard The ADS is operated by the Smithsonian Astrophysical Observatory under NASA Cooperative Agreement NNX16AC86A

Get PriceEmail Inquiry

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.",

Get PriceEmail Inquiry

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 compared with

Get PriceEmail Inquiry

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

Get PriceEmail Inquiry

Experimental study on failure mechanism of modeled ...

Experimental study on failure mechanism of modeled recycled aggregate concrete under uniaxial compression November 2014 Jianzhu Jiegou Xuebao/Journal of Building Structures 35:340-348

Get PriceEmail Inquiry

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 ...

Get PriceEmail Inquiry

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.

Get PriceEmail Inquiry

Numerical Discrete-Element Method Investigation on Failure ...

Jan 01, 2019  This study numerically investigates the failure processes of recycled aggregate concrete (RAC) and natural aggregate concrete (NAC). A two-dimensional simulation based on a discrete-element method (DEM) is conducted with a universal distinct-element code (UDEC) program.

Get PriceEmail Inquiry

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.

Get PriceEmail Inquiry

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.

Get PriceEmail Inquiry

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.

Get PriceEmail Inquiry

3‐D base force element method on meso‐damage analysis for ...

May 12, 2021  A spatial random aggregate model of RAC is proposed. 3-D numerical simulations of RAC under uniaxial mechanical stress are carried out. The macroscopic stress–strain relationship and failure process of RAC under uniaxial stress based on the 3-D BFEM are obtained. The numerical results show a good consistency with the experimental results.

Get PriceEmail Inquiry

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).

Get PriceEmail Inquiry

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 zones are constructed by

Get PriceEmail Inquiry

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.

Get PriceEmail Inquiry

Experimental study on behavior of mortar-aggregate ...

摘要 A push-out test program was designed and conducted to study the meso-scale behavior of mortar-aggregate interface for concrete after elevated temperatures ranging from 20°C to 600°C with the concept of modeled concrete (MC) and modeled recycled aggregate concrete (MRAC).

Get PriceEmail Inquiry

‪Wengui Li‬ - ‪Google Scholar‬

2015. Effects of interfacial transition zones on the stress–strain behavior of modeled recycled aggregate concrete. J Xiao, W Li, DJ Corr, SP Shah. Cement and Concrete Research 52, 82-99. , 2013. 167. 2013. Recent studies on mechanical properties of recycled aggregate concrete in China—A review. JZ

Get PriceEmail Inquiry

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 zones are constructed by

Get PriceEmail Inquiry

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.

Get PriceEmail Inquiry

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.

Get PriceEmail Inquiry

Analysis of Compressive Fatigue Failure of Recycled ...

Using recycled aggregate in concrete is effective in recycling construction and demolition waste. It is of critical significance to understand the fatigue properties of recycled aggregate concrete (RAC) to implement it safely in structures subjected to repeated or fatigue load. In this study, a series of fatigue tests was performed to investigate the compressive fatigue behavior of RAC.

Get PriceEmail Inquiry

Mesoscale fracture analysis of recycled aggregate concrete ...

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.

Get PriceEmail Inquiry

Mechanisms Investigation of Basalt Fiber Concrete with ...

Sep 10, 2020  strength of recycled concrete. The damage mechanism of recycled aggregate concrete is analyzed by the acoustic emission technique. With the method of acoustic emission (AE) b-value analysis, the evolution and failure process of recycled concrete from the initial defect microcrack formation to the macroscopic crack is studied.

Get PriceEmail Inquiry

(PDF) Fractal characteristic of recycled aggregate and its ...

In this paper, an overview focusing on the bond behavior of recycled coarse aggregate concrete (RAC) with steel bar is carried out. The results show that the failure modes of RAC specimen were not ...

Get PriceEmail Inquiry

Study on the Effect of Recycled Aggregate on the ...

Using Trial algorithm, the proportion of recycled aggregates in two particle size ranges is 10-30mm: 5-10mm = 9:1, and the composite grading curves of recycled aggregate, as shown in Figure1. Fig.1. The composite grading curves of recycled aggregate C. Mix proportion The compressive strength, thermal insulation coefficient and

Get PriceEmail Inquiry

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.

Get PriceEmail Inquiry

3‐D base force element method on meso‐damage analysis for ...

May 12, 2021  A spatial random aggregate model of RAC is proposed. 3-D numerical simulations of RAC under uniaxial mechanical stress are carried out. The macroscopic stress–strain relationship and failure process of RAC under uniaxial stress based on the 3-D BFEM are obtained. The numerical results show a good consistency with the experimental results.

Get PriceEmail Inquiry

CONSTITUTIVE MODEL FOR RECYCLED AGGREGATE

Keywords: recycled aggregate concrete, performance parameter, constitutive formulation, fracture energy, triaxial compression. Abstract. In this paper, the Performance Dependent Model previously proposed by Folino Etse is reformu-lated in order to capture the mechanical behavior of Recycled Aggregate Concrete (RAC), a special type

Get PriceEmail Inquiry

Peridynamics modeling and simulation of meso-scale ...

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, and new ...

Get PriceEmail Inquiry

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

Get PriceEmail Inquiry

Experimental study on the compressive strength, damping ...

Dec 04, 2019  At present, many modification methods have been proposed to improve the performance of recycled aggregate concrete (RAC). In this study, tests on the compressive strength and damping properties of modified RAC with the addition of different proportions of recycled coarse aggregate (RCA) (0, 50, 100%), rubber powder (10, 15, 20%), steel fibre (5, 7.5, 10%) and fly ash (15, 20, 5%) are carried

Get PriceEmail Inquiry