2015 CSCE Annual Conference Regina - Building on our Growth Opportunities Conference
Dr. M. T. Bassuoni, University of Manitoba
Mr. Murray Bruce Peters , City of Winnipeg
Premature deterioration is a common concern for all types of concrete structures. To help mitigating this issue, the concrete hardening process is required to take place in a manner which provides optimum hydration development. This can be achieved through proper and adequate curing practices of concrete. The effect of curing on the performance of concrete is essential at controlling its mechanical and durability performance during service. Depending on the adiabatic conditions, type of application and project specifications, the curing approach may vary considerably (e.g. continuous fog spraying for long time, application of a curing compound, etc.). The aim of this research project is to assess the effect of three different curing compound applications (no curing, one coat of curing compound, two coats of curing compound) on the behavior of concrete pavements, and thus projecting their long-term durability. The project involved experiments on cores extracted from a newly (August 2014) constructed pavement sections in Mulvey Avenue, Winnipeg in comparison to corresponding specimens produced from similar concrete under laboratory conditions. Absorption and rapid chloride permeability tests were conducted on specimens to study the effect of the different curing methods, and the results were statistically analyzed by the analysis of variance method. The overall trends indicate that applying curing compounds is critical to ensure moisture retention in concrete for efficient hydration reactions and microstructural development. Even one coat of curing compound thoroughly applied to concrete is sufficient for achieving target strength and durability characteristics.