Article
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Preserved in Portico This version is not peer-reviewed
Simulation-Based Analysis of Micro-Damage to Recycled Concrete Containing Brick Coarse Aggregate
Version 1
: Received: 31 July 2023 / Approved: 1 August 2023 / Online: 1 August 2023 (10:00:18 CEST)
A peer-reviewed article of this Preprint also exists.
Qi, L.; Yu, B.; Yu, M.; Zhang, M. Simulation-Based Analysis of Micro-Damage to Recycled Concrete-Containing Brick Coarse Aggregates. Buildings 2023, 13, 2297. Qi, L.; Yu, B.; Yu, M.; Zhang, M. Simulation-Based Analysis of Micro-Damage to Recycled Concrete-Containing Brick Coarse Aggregates. Buildings 2023, 13, 2297.
Abstract
To achieve sustainable development during urbanization, construction waste is recycled for use as an aggregate in recycled concrete (RC). To determine the influence of the brick content in coarse recycled aggregates on the damage sustained by the resultant RC, the RC was first divided into seven phases: natural crushed stone, old gravel inside waste concrete, bricks, new mortar, old mortar on waste concrete surfaces, and new and old interface transition zones. The Monte Carlo method was then applied to establish a two-dimensional random aggregate model of the RC made with coarse brick aggregates. The ABAQUS software package was used to simulate a uniaxial compression test, the results of which were combined with those of a macro-test to determine the internal damage change rule of brick-containing RC. The stress–strain curves obtained from the simulation coincided well with that of the macroscopic tests. As the brick content increased, the damage zone inside the specimen and the number of microcracks increased. The stress concentration area decreased, as indicated by a lower compressive strength in the macro-test. The results indicate that higher brick contents in RC yield more initial damage inside the concrete and a lower compressive strength.
Keywords
brick concrete aggregate; brick content; random aggregate; interface transition zone; microscopic damage
Subject
Engineering, Civil Engineering
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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