Treatments for the Improvement of Recycled Aggregate
Publication: Journal of Materials in Civil Engineering
Volume 16, Issue 6
Abstract
The microstructure of recycled aggregate prepared from the crushing of old concrete was studied. It was found that the recycled aggregate is covered with loose particles that may prevent good bonding between the new cement matrix and the recycled aggregate. The old cement paste that remained on the natural aggregate was porous and cracked, leading to weak mechanical properties of the recycled aggregate. Treatment of the recycled aggregate by impregnation of silica fume solution and by ultrasonic cleaning was studied with the objective of overcoming the above-mentioned limitations. An increase of and in the compressive strength at ages 7 and was observed after the silica fume treatment. Ultrasonic treatment led to an improvement of .
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 16 • Issue 6 • December 2004
Pages: 597 - 603
Copyright
Copyright © 2004 ASCE.
History
Published online: Nov 15, 2004
Published in print: Dec 2004
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