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TitleDurability of high-performance concrete with fly ash
Author(s)Camões, Aires
Ferreira, Rui Miguel
Aguiar, J. L. Barroso de
Jalali, Said
KeywordsHigh performance concrete
High volume fly ash concrete
Chloride diffusion
Electrical resistivity
Capillary absorption
Issue dateSep-2002
Abstract(s)High-performance concrete (HPC) is usually produced using high quality materials. These high quality constituents drastically increase the initial cost of HPC, hence hindering its more widespread use. Therefore, the main goal of this research project was to produce a low cost enhanced performance concrete or even a low cost HPC, using low quality fly ash and locally available crushed aggregates. In this way, a significant reduction in the use of Portland cement, as well as that of scarce natural resources, would be obtained. The effect of high percentages of fly ash and crushed aggregates on concrete performance was studied by comparing the mechanical and durability performances of such concretes with nominally similar types of concrete with no fly ash incorporated. The results obtained indicate that it is possible to produce concrete in the low range of HPC with up to 65 MPa at 56 days by replacing up to 40% of cement with as received fly ash using crushed granite aggregates. Furthermore, it was observed that workability and durability both increased significantly when fly ash partially replaced Portland cement.
TypeConference paper
AccessOpen access
Appears in Collections:C-TAC - Comunicações a Conferências Internacionais

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