Anisotropic Compressive Behaviour of Concrete from Slabs Damaged by Alkali-Silica Reaction

Søren Gustenhoff Hansen*, Linh Cao Hoang

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Abstract

This paper investigates the anisotropy of the compressive strength and stiffness of concrete in ASR-damaged concrete slabs through an in-depth literature review and experiments. Using Digital Image Correlation (DIC), deformations and crack propagation are closely monitored and analysed. The results show that: (i) The vertical compressive strength and stiffness are lower than the horizontal; (ii) the reduction of the vertical strength and stiffness is mainly due to closure of the horizontal ASR-induced macro-cracks and; (iii) the reduction of the horizontal strength and stiffness is mainly due to the presence of ASR-induced micro-cracks in the cement paste. It is found that the load-carrying capacity and the serviceability for ASR-damaged slabs should be assessed based on the horizontal strength and stiffness.

OriginalsprogEngelsk
Artikelnummer120377
TidsskriftConstruction and Building Materials
Vol/bind267
ISSN0950-0618
DOI
StatusUdgivet - 18. jan. 2021

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