NDLI: Uniaxial Compressive Stress–Strain Relation of Recycled Coarse Aggregate Concrete with Different Carbonation Depths

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Uniaxial Compressive Stress–Strain Relation of Recycled Coarse Aggregate Concrete with Different Carbonation Depths

Content Provider	MDPI
Author	Tu, Kun Wu, Jin Wang, Yiyuan Deng, Huachao Zhang, Rui
Copyright Year	2022
Description	The stress–strain relation of recycled aggregate concrete (RAC) after carbonation is very important to the assessment of the durability of RAC. The objective of this study is to investigate the uniaxial compressive stress–strain curves of RAC after carbonation. In this study, the specimens were prepared with 70-mm diameter and 140-mm height cylinders, and the carbonation of the specimens was accelerated after curing 28 days. Then a uniaxial compressive loading test on the specimens was performed by using a mechanical testing machine. The results show that the peak stress ( $σ0$ ) and elastic modulus ( $Ec$ ) of all specimens increase with the increase of carbonation depth. The ratio of ultimate strain to peak strain ( $εu/ε0$ ) and relative toughness of the specimens decrease with the increase of carbonation depth. Furthermore, carbonation has a stronger effect on natural coarse aggregate concrete (NAC) than the 50% replacement rate of RAC with similar compressive strength. Stress–strain models of recycled aggregate concrete with different carbonation depths were established according to experimental results.
Starting Page	5429
e-ISSN	19961944
DOI	10.3390/ma15155429
Journal	Materials
Issue Number	15
Volume Number	15
Language	English
Publisher	MDPI
Publisher Date	2022-08-07
Access Restriction	Open
Subject Keyword	Materials Characterization and Testing of Materials Recycled Coarse Aggregate Concrete Carbonation Uniaxial Compressive Loading Stress–strain Curves Fitting Analysis
Content Type	Text
Resource Type	Article

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