Standardized Testing for Determining the Durability of High-Volume Fly Ash Mixtures
Publication: Journal of Materials in Civil Engineering
Volume 26, Issue 1
Abstract
Fly ash is becoming increasing used in concrete structures for enhanced durability. This research investigated two types of fly ash in conjunction with four cements. The cements were both high and low alkali, with and without blended silica fume. Mortar and concrete mixtures were prepared containing from 0 to 80% fly ash replacement. Standardized tests were performed for compressive strength, as well as sulfate, chloride, and alkali resistance. High replacement levels performed relatively well in sulfate and alkali resistance, but poorly in regards to compressive strength and chloride resistance. From a durability perspective, 40% fly ash replacement was found to have the best overall performance from these mixtures. Standardized test methods are comparative by nature, and as such cannot replicate the complexity of concrete mixtures and their exposure conditions; higher replacements have been successfully used in practice.
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 26 • Issue 1 • January 2014
Pages: 206 - 210
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Jul 19, 2012
Accepted: Nov 16, 2012
Published online: Nov 20, 2012
Discussion open until: Apr 20, 2013
Published in print: Jan 1, 2014
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