Analysis of tensile behavior of recycled aggregate concrete using acoustic emission technique
Journal article, 2020

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.

Acoustic emission

Recycled aggregate concrete

Tensile behavior

Recycled aggregates

Author

Natalie Williams Portal

RISE Research Institutes of Sweden

Mathias Flansbjer

RISE Research Institutes of Sweden

Diego Carró‐lopez

University of A Coruña

Ignasi Fernandez

Chalmers, Architecture and Civil Engineering, Structural Engineering

RILEM Technical Letters

25180231 (eISSN)

Vol. 5 131-140

Återvunnen betongkross i klimatneutrala konstruktioner inom transportinfrastruktur (ReConStruct)

VINNOVA (2017-02687), 2017-10-01 -- 2019-09-30.

Subject Categories

Infrastructure Engineering

Other Materials Engineering

Building Technologies

DOI

10.21809/rilemtechlett.2020.121

More information

Latest update

11/27/2021