The influence of cracks on the salt scaling resistance of recycled aggregate concrete

Author(s): Vedran N. Carević, Ivan S. Ignjatović
Paper Category: proceedings
Book Title: Proceedings of the International Conference on Sustainable Materials,
Systems and Structures (SMSS2019)
Editor(s): Ivana Carević Stjepan Lakušić Dirk Schlicke
ISBN: 978-2-35158-217-6
e-ISBN: 978-2-35158-218-3
Publisher: RILEM Publications SARL
Publication Year: 2019
Pages: 72 - 73
Total Pages: 2
Language: English

Abstract: The use of recycled concrete aggregate (RCA) for the production of new concrete can be a
promising solution for enormous use of raw materials, great energy consumption and large
waste production. However, durability of recycle aggregate concrete (RAC) remains as an
important issue regarding its sustainability. With relatively low tensile strength of concrete, the
cracking of structural elements is almost inevitable due to the effect of load, so the influence of
cracks on concrete durability also must be taken into consideration. Furthermore, the real
environmental impact on concrete elements is not only one but a combination of different
deterioration mechanisms. The influence of loading induced cracks (0.08 mm and 0.20 mm
width) on natural or recycled aggregate concrete (NAC or RAC) resistance to salt scaling and
the impact of previous carbonation on the salt scaling resistance of both concrete types was
presented in this paper. Experimental results show that the presence of cracks on the concrete
surface can increase the salt scaling resistance. Both the crack width and a number of cracks
proved to be an important factor influencing concrete resistance to salt scaling. Also, it is shown
that previous carbonation of RAC decreases the salt scaling resistance of concrete for more than
2.5 times.

Online Publication: 2019
Publication Type: full text
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