Richards and Shehata 2020.pdf (647.72 kB)
Download file

Effects of Curing Method on Properties and Salt-Scaling Resistance of Concrete under Lab Testing

Download (647.72 kB)
journal contribution
posted on 13.10.2021, 16:47 authored by Greg Richards, Medhat ShehataMedhat Shehata
This paper presents a study of the effect of curing on the salt-scaling resistance of concrete containing supplementary cementitious materials (SCMs) under lab conditions. Two curing methods were examined: moist curing and wrapping in a tight plastic sheet. Wrapping concrete slabs in plastic was adopted to represent curing methods that do not supply the concrete with additional water. The two curing methods produced different scaling results; however, the outcomes did not change in terms of meeting or failing the acceptance limit. Curing in plastic wraps produced higher carbonation depth prior to exposing the sample to the salt solution. This could have contributed, partly, to the higher scaling obtained in wrapped samples, other than the sample with 40% high-calcium fly ash. For this sample, there is evidence that curing using plastic wraps maintained high alkali concentration in the surface concrete, which could have enhanced the pozzolanic activity of the fly ash at the surface.

Funding

Funding for this research is supported by a Discovery Grant from the Natural Sciences and Engineering Research Council of Canada. The financial support of this organization is highly appreciated.

History

Publisher Statement

This material may be downloaded for personal use only. Any other use requires prior permission of the American Society of Civil Engineers. This material may be found at https://doi.org/10.1061/(ASCE)MT.1943-5533.0003297