Triple Blending with Fly Ash Microsphere and Condensed Silica Fume to Improve Performance of Cement Paste
Publication: Journal of Materials in Civil Engineering
Volume 25, Issue 5
Abstract
In theory, the addition of fly ash microsphere (FAM), which is finer than cement, and condensed silica fume (CSF), which is even finer, to successively fill the voids between cement grains can increase the packing density of the cementitious materials and reduce the volume of voids to be filled with water. This would release more water to increase the flowability at same water/cementitious materials (W/CM) ratio or allow the W/CM ratio to be lowered to increase the strength at same flowability requirement. This study was aimed to evaluate the effects of FAM and CSF on the packing density of cementitious materials and the water film thickness (WFT) in cement paste and investigate the effects of the WFT on the flowability, cohesiveness, adhesiveness, and strength of cement paste. The results showed that adding FAM and CSF can significantly increase the packing density and WFT and thereby greatly improve the overall performance of cement paste.
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Information
Published In
Journal of Materials in Civil Engineering
Volume 25 • Issue 5 • May 2013
Pages: 618 - 626
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Jan 21, 2012
Accepted: Jun 15, 2012
Published online: Aug 28, 2012
Published in print: May 1, 2013
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