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Analysis of tensile behavior of recycled aggregate concrete using acoustic emission technique
RISE Research Institutes of Sweden, Materials and Production, Applied Mechanics.ORCID iD: 0000-0002-0033-1841
RISE Research Institutes of Sweden, Materials and Production, Applied Mechanics.ORCID iD: 0000-0002-3481-1368
Universidade da Coruña, Spain.
Chalmers University of Technology, Sweden.
2020 (English)In: RILEM Technical Letters, ISSN 2518-0231, Vol. 5, p. 131-140Article in journal (Refereed) Published
Abstract [en]

Recycled concrete aggregate (RCA) was processed from reinforced concrete edge beams sourced from a demolished bridge in Sweden. This material replaced different ratios of coarse aggregate in a benchmark concrete. The tensile behavior of the developed concrete mixes was characterized via monotonic and cyclic uniaxial tensile tests performed on notched cylinders. Such tensile tests allow for the quantification of the fracture energy and softening behavior of the concrete. Moreover, acoustic emission (AE) measurements were conducted in conjunction with the cyclic tests to characterize e.g. micro‐crack initiation and development, as well as crack localization. The tensile behavior of the various materials was found to be similar with minimal variation in the results. However, the softening behavior suggests that the RCA materials are slightly more brittle compared to both the mother and benchmark materials, which could be indicative of differences in the interface transition zones. The corresponding AE measurements also indicated similarities between the micro‐crack initiation and development for these mixes. It can be constituted that if the concrete used to produce RCA is of high quality and from one source, the resulting RAC will have adequate tensile properties with minimal variation, despite the aggregate replacement ratio. © The Author(s) 2020.

Place, publisher, year, edition, pages
RILEM Publications SARL , 2020. Vol. 5, p. 131-140
Keywords [en]
Acoustic emission, Recycled aggregate concrete, Recycled aggregates, Tensile behavior
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-51964DOI: 10.21809/rilemtechlett.2020.121Scopus ID: 2-s2.0-85099143025OAI: oai:DiVA.org:ri-51964DiVA, id: diva2:1519855
Note

Funding text 1: The presented research was made possible with the support of Vinnova Infrasweden 2030: a strategic innovation program (project no. 2017-02687) and ÅForsk foundation (project no. 18-429).

Available from: 2021-01-19 Created: 2021-01-19 Last updated: 2023-05-26Bibliographically approved

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Williams Portal, NatalieFlansbjer, Mathias

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