Mesostructural modelling in recycled aggregate concrete
Welcome to Cina Charm

Mesostructural modelling in recycled aggregate concrete.

Meso-structural modelling in recycled aggregate concrete ...

Jan 01, 2019  Most meso-structural models for conventional concrete assume the material to consist in three phases, whereas the models for recycled concrete aggregate envisage five. Peak stress is located in the ITZ, formation site of the microcracks that subsequently propagate across the

Get Price

Elastoplastic-damaged meso-scale modelling of concrete ...

May 01, 2018  To realistically model a concrete sample [ 44, 45 ], made with NAs and RCAs at the meso-scale level, a laser scanner has been used to get a digital 3D representation of the external geometry of a few single samples of aggregates from recycled concrete. This technology is ideal for the measurement and inspection of contoured surfaces and complex ...

Get Price

Mesoscale Modelling of Concrete with Recycled Aggregates

Mesoscale Modelling of Concrete with Recycled Aggregates ... description of concrete at the meso-level can be appreciated; then, creep of cement paste and ITZ allows to incorporate in the model ...

Get Price

Peridynamics modeling and simulation of meso-scale ...

Aug 01, 2021  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 ...

Get Price

Meso-scale modelling of compressive fracture in concrete ...

Feb 01, 2021  This paper presents a meso-scale modelling framework to investigate the fracture process in concrete subjected to uniaxial and biaxial compression accounting for its mesostructural characteristics. 3D mesostructure of concrete consisting of coarse aggregates, mortar and interfacial transition zone between them was developed using an in-house code based on the Voronoi

Get Price

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.

Get Price

Elastoplastic-damaged meso-scale modelling of concrete ...

May 01, 2018  To realistically model a concrete sample [ 44, 45 ], made with NAs and RCAs at the meso-scale level, a laser scanner has been used to get a digital 3D representation of the external geometry of a few single samples of aggregates from recycled concrete. This technology is ideal for the measurement and inspection of contoured surfaces and complex ...

Get Price

Elastoplastic-damaged meso-scale modelling of concrete ...

Request PDF Elastoplastic-damaged meso-scale modelling of concrete with recycled aggregates The use of recycled concrete aggregates is very attractive from the point of view of reducing ...

Get Price

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.

Get Price

The Meso-level Numerical Experiment Research of the ...

This paper is focused on developing meso-level finite element model of recycled concrete. Based on the existed researching findings and the Fuller curve, the constitution of aggregate can be determined. Using the Monte Carlo method (MC) to place the aggregate, the meso sample of RC can be developed randomly and the graded mesh

Get Price

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

May 12, 2021  The 3-D base force element method (BFEM) for damage problems is proposed, which is applied to analyze the damage mechanism of recycled aggregate concrete (RAC). A piecewise curve damage constitutive model is given to simulate the constitutive relationships of RAC phases.

Get Price

Meso-Analysis of Dynamic Compressive Behavior of Recycled ...

In this paper, the base force element method (BFEM) for dynamic damage problems is proposed. And the BFEM model was applied to investigate the dynamic mechanical behavior of recycled aggregate conc...

Get Price

3D mesoscopic investigation of specimen size effect on the ...

A novel mesoscale model considering meso-structural characteristic of aggregate Significance Concrete is widely used in the building and construction industry owing to its excellent properties.

Get Price

A Simple Approach for Generating Random Aggregate Model of ...

Generating random aggregate models (RAMs) plays a key role in the mesoscopic modelling of concrete-like composite materials. The arbitrary geometry, wide gradation, and high volume ratio of aggregates pose a great challenge for fast and efficient numerical construction of concrete meso-structures. This paper presents a simple strategy for generating RAMs of concrete based on Laguerre ...

Get Price

(PDF) On the effect of ITZ thickness in meso-scale models ...

1. ITZ thickness has a pronounced effect on the concrete tensile. behaviour – when thickness is varied from 0.05 (ITZ real thick-. ness) to 1 mm the tensile strength is reduced by about 26% ...

Get Price

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 Price

Behavior of meso-scale heterogeneous concrete under ...

In order to model the meso-scale structure of concrete, a ran- domaggregate generation and packing program is developed while H. Chen et al./Construction and Building Materials 178 (2018) 418 ...

Get Price

Understanding variability in recycled aggregate concrete ...

Understanding variability in recycled aggregate concrete mechanical properties through numerical simulation and statistical evaluation ... localizations were observed near the aggregate boundaries due to large material stiffness discontinuities in the RAC meso-level structure. ... Finite element modeling, Material stiffness, Mechanical ...

Get Price

A mesoscale model based on Monte-Carlo method for concrete ...

Oct 12, 2012  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.

Get Price

A concurrent multiscale approach for modeling recycled ...

The use of recycled concrete aggregates in new concrete is an alternative that can provide economical and environmental benefits. However, the influence of the inert particles on the mechanical ...

Get Price

Meso-scale simulation of the post-cracking behavior of ...

The New Boundaries of Structural Concrete Session SUPERCONCRETE Meso-scale simulation of the post-cracking behavior of hybrid industrial/recycled steel fiber-reinforced concrete A. Caggiano1, D. Said Schicchi2, E. Martinelli3 and G. Etse1 ABSTRACT: This paper aims at investigating the mechanical behavior of concrete reinforced with

Get Price

Discrete Element Mesoscale Modeling of Recycled Lump ...

In the past decade, directly reusing large pieces of coarsely crushed concrete (referred to as demolished concrete lumps or DCLs) with fresh concrete in new construction was demonstrated as an efficient technique for the recycling of waste concrete. Previous studies investigated the mechanical properties of recycled lump concrete (RLC) containing different sizes of DCLs; however, for actual ...

Get Price

3D meso-scale modelling of concrete material in spall ...

Mar 12, 2014  In the meso-scale model, concrete specimen is assumed to be a two-phase composite material consisting of coarse aggregates with volume percentage 35 % and mortar matrix. Three series of coarse aggregates, namely 4–8, 8–12 and 12–16 mm, are considered in the numerical model.

Get Price

Spall Behaviors of Metaconcrete: 3D Meso-Scale Modelling ...

This study establishes 3D meso-scale model of metaconcrete including mortar, randomly distributed natural aggregates and engineered aggregates to simulate spall behaviors of metaconcrete via the software LS-DYNA. The responses of metaconcrete composed of engineered aggregates with single bandgap and multiple bandgaps are studied.

Get Price

A Simple Approach for Generating Random Aggregate Model of ...

Generating random aggregate models (RAMs) plays a key role in the mesoscopic modelling of concrete-like composite materials. The arbitrary geometry, wide gradation, and high volume ratio of aggregates pose a great challenge for fast and efficient numerical construction of concrete meso-structures. This paper presents a simple strategy for generating RAMs of concrete based on Laguerre ...

Get Price

A concurrent multiscale approach for modeling recycled ...

The use of recycled concrete aggregates in new concrete is an alternative that can provide economical and environmental benefits. However, the influence of the inert particles on the mechanical ...

Get Price

Meso-structural study of concrete fracture using interface ...

A recently developed FE-based mesostructural model for the mechanical behavior of heterogeneous quasi-brittle materials is used systematically to analyze concrete specimens in 2D. The numerical model is based on the use of zero-thickness interface elements equipped with a normal-shear traction-separation constitutive law representing non-linear fracture, which may be considered a mixed-mode ...

Get Price

Recycled Aggregate Concrete Structures SpringerLink

Dr. Xiao’s main areas of research are in the material behavior and structural performance of recycled aggregate concrete, aspects he has been exploring for the past 15 years. He is the author or co-author of more than 300 papers on material properties and material behavior, interfacial layer mechanisms, and modeled recycled aggregate concrete.

Get Price

Reciclado de materiales - IETCC

Título del Capítulo: Meso-structural modelling in recycled aggregate concrete (Chapter 15) Título del Libro: ECO-EFFICIENT CONCRETE Subtitle: New trends in concrete with Recycled Aggregates. Editors: Jorge de Brito and Francisco Agrela. Autores: C. Medina, J. Sánchez, I.F. Sáez del Bosque, M. Frías, M.I. Sánchez de Rojas

Get Price

Toward a codified design of recycled aggregate concrete ...

Dec 09, 2020  The use of recycled aggregate (RA) to produce recycled aggregate concrete (RAC) is a proven way of decreasing the consumption of natural aggregate (NA) and the landfilling of construction and demolition waste. However, adoption of codes for the design of

Get Price

Key Engineering Materials Vols. 417-418 p. 18 ...

The numerical model proposed in the paper is in the first time used to analyze the mechanical properties of recycled aggregate concrete. Efficiency and accuracy of the numerical model has been demonstrated. It is indicated that this model has potential to be extended for 3 dimensional structural analysis of recycled aggregate concrete.

Get Price

Computational Modelling of Concrete Structures ...

Feb 07, 2018  Coupled C-M meso-scale model for ASR expansion in concrete J. Liaudat, C.M. López I. Carol. Numerical strategies for the modelling of reinforced concrete structures affected by internal swelling in variable thermo-hydric conditions B. Nedjar C. Rospars. A finite element implementation of delayed ettringite formation in concrete structures

Get Price

Effects of interfacial transition zones on the stress ...

Together with the meso/micro-scale mechanical properties of each phase in Modeled Recycled Aggregate Concrete (MRAC), the plastic-damage constitutive models are employed in numerical studies on MRAC under uniaxial compression and uniaxial tension loadings to predict the overall mechanical behavior, particularly the stress-strain relationship.

Get Price

Computational Modelling of Concrete Structures - 1st ...

Mar 26, 2014  Constitutive and multiscale modelling of concrete. Hierarchical multiscale models for localization phenomena within the framework of FE2-X1 J.F. Unger. Modeling of Alkali-Silica Reaction in concrete: A multiscale approach for structural analysis R. Esposito M.A.N. Hendriks. A novel strain-rate model for concrete and its influence on wave ...

Get Price
Copyright © 2021.Cina Charm All rights reserved.Cina Charm