Concrete crack potential predictions with the aid of a novel plastic ring, electrical resistivity and setting time
Keywords:
concrete, electrical resistivity, restrained shrinkage crack, setting timeAbstract
Hydration and restrained shrinkage crack behaviours of different concrete grades were independently monitored using a non-contact electrical resistivity apparatus and a novel plastic ring mould respectively. The electrical resistivity curve trend is similar for all the concrete samples, in which the lowest concrete grade has the highest resistivity until reaching acceleration point which was then overtaken by the highest concrete grade. Four different hydration periods were identified upon which the hydration process can be based; these periods are classified into dissolution, induction, acceleration and deceleration periods. Also, initial and final setting times for the samples were examined, which confirmed that the decreasing rate of resistivity development for the lower concrete grade corresponds to its initial setting time range. Restrained shrinkage crack result shows that the highest concrete grade propagated cracks earlier than the lowest concrete grade and thereby the higher cracking potential of higher strength mixture was confirmed. Linear fitting was then developed to estimate concrete crack potential based on its electrical resistivity. Hence, both electrical resistivity measurement and novel plastic mould (which is very cheap, user-friendly and fast filled) are hereby proposed as a convenient alternative means of assessing concrete cracking potential.Downloads
Published
Issue
Section
License
Engineering review uses the Creative Commons Attribution-NonCommercial-NoDerivatives (CC-BY-NC-ND) 4.0 International License, which governs the use, publishing and distribution of articles by authors, publishers and the wider general public.
The authors are allowed to post a digital file of the published article, or the link to the published article (Enginering Review web page) may be made publicly available on websites or repositories, such as the Author’s personal website, preprint servers, university networks or primary employer’s institutional websites, third party institutional or subject-based repositories, and conference websites that feature presentations by the Author(s) based on the published article, under the condition that the article is posted in its unaltered Engineering Review form, exclusively for non-commercial purposes.
The journal Engineering Review’s publishing procedure is performed in accordance with the publishing ethics statements, defined within the Publishing Ethics Resource Kit. The Ethics statement is available in the document Ethics Policies.