The influence of aging on the fracture characteristics of recycled aggregate concrete through three methods

In this research, to assess the impact of aging on the fracture properties of recycled aggregate concrete (RAC), three‐point bending tests were carried out on 260 specimens. Then, work of fracture method (WFM), size effect method (SEM), and boundary effect method (BEM) were utilized for analysis of...

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Bibliographic Details
Published inStructural concrete : journal of the FIB Vol. 22; no. S1; pp. E74 - E93
Main Authors Fallahnejad, Hossein, Davoodi, Mohammad Reza, Nikbin, Iman Mohammadpour
Format Journal Article
LanguageEnglish
Published Weinheim WILEY‐VCH Verlag GmbH & Co. KGaA 01.01.2021
Wiley Subscription Services, Inc
Subjects
Aging (natural)
boundary effect method
brittleness
Concrete aggregates
Energy value
fracture toughness
recycled aggregate concrete
Recycled materials
Size effects
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Summary:In this research, to assess the impact of aging on the fracture properties of recycled aggregate concrete (RAC), three‐point bending tests were carried out on 260 specimens. Then, work of fracture method (WFM), size effect method (SEM), and boundary effect method (BEM) were utilized for analysis of fracture parameters. The result showed that fracture energy values for RAC were 4.2%, 7.1%, 22.7% and 24.2% less than natural aggregate concrete (NAC) ones at 3, 7, 28 and 90 days, respectively. Based on calculation of the characteristic length, the behavior of RAC is more ductile than NAC at early ages. However, through time, the ductility of RAC becomes less than NAC. On average, the ratio of fracture energy achieved from WFM (GF) to initial fracture energy achieved from SEM (Gf) for RAC and NAC was 2.38 and 2.14, respectively. The comparison of fracture energy obtained by BEM and modified WFM showed that these values were close to each other.
Bibliography:Discussion on this paper must be submitted within two months of the print publication. The discussion will then be published in print, along with the authors’ closure, if any, approximately nine months after the print publication.
ISSN:1464-4177
1751-7648
DOI:10.1002/suco.202000119