High-Volume Fly Ash Concrete with and without Hydrated Lime: Chloride Diffusion Coefficient from Accelerated Test
Publication: Journal of Materials in Civil Engineering
Volume 25, Issue 3
Abstract
Fly ash changes the microstructure of paste and can increase concrete durability. Calcium hydrated lime was added to concrete with 50% of the cement, by weight, substituted with fly ash, with the intent of replacing some of the calcium hydroxide consumed by the pozzolanic activity. Three proportions of mixes were studied: concrete with high early strength cement (HESC), concrete with 50% HESC and 50% fly ash, and concrete with 50% HESC, 50% fly ash and an additional 20% of hydrated lime. They were then tested according to ASTM C1202, but with the application of a voltage of 30 V during 35 h. Results revealed that concretes containing fly ash and hydrated lime presented a lower accumulated charge density and coefficient of chloride diffusion than the HESC concrete used as a reference.
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Acknowledgments
The authors thank the Fundação de Amparo à Pesquisa do Estado de São Paulo—FAPESP—for the financial support to develop this investigation.
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Information
Published In
Journal of Materials in Civil Engineering
Volume 25 • Issue 3 • March 2013
Pages: 411 - 418
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Jan 25, 2012
Accepted: May 25, 2012
Published online: May 31, 2012
Published in print: Mar 1, 2013
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