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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Influence of Moisture Curing on Durability of Fly Ash Concrete for Road Pavements
Author(s): M. Vieira, I. R. de Almeida, and A. F. Goncalves
Publication: Special Publication
Appears on pages(s): 91-102
Keywords: abrasion wear; capillary; compressive strength; concrete pavements; curing; durability; fly ash; permeability; porosity
Abstract:In Portugal, fly ash is sometimes used as a cement replacement material in concrete for road pavements. The percentages of replacement generally range from about 30% in the top pavement layer up to 50% in the bottom layer. A study was carried out to evaluate to what extent the water curing practice could affect some of the properties of concrete with different amounts of cement replaced by fly ash. For this purpose, several properties generally related to the durability of concrete pavements were determined. Abrasion test, as well as determinations of compressive strength, capillary absorption, oxygen permeability and open porosity, were performed on concrete mixtures with different cement and fly ash contents, using limestone coarse aggregate and natural siliceous sand. This paper presents results on the influence of different water curing times on these properties. The results show that fly ash concretes can develop satisfactory resistance to abrasion, even with large amounts of cement replacement. Concretes with lower permeability and higher strength generally tended to exhibit better abrasion resistance. In general, concrete performance was improved with longer water curing times.
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