Analysis of tensile behavior of recycled aggregate concrete using acoustic emission technique
Artikel i vetenskaplig tidskrift, 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 aggregates

Tensile behavior

Recycled aggregate concrete

Författare

Natalie Williams Portal

RISE Research Institutes of Sweden

Mathias Flansbjer

RISE Research Institutes of Sweden

Diego Carró‐lopez

Universidade da Coruña

Ignasi Fernandez

Chalmers, Arkitektur och samhällsbyggnadsteknik, Konstruktionsteknik

RILEM Technical Letters

25180231 (eISSN)

Vol. 5 131-140

Ämneskategorier

Infrastrukturteknik

Annan materialteknik

Husbyggnad

DOI

10.21809/rilemtechlett.2020.121

Mer information

Senast uppdaterat

2021-04-28