Performance of Volcanic Ash Based Precast and In Situ Blended Cement Concretes in Marine Environment
Publication: Journal of Materials in Civil Engineering
Volume 17, Issue 6
Abstract
This paper reports on the results of the investigation on concrete specimens made with different plain (ASTM I, II, and V) and blended cements incorporating different percentages of volcanic ash (VA) up to 30% (as cement replacement). The specimens were exposed to marine environment for a period of . A set of combinations with mixing water and initial curing conditions were studied such that cast in situ and precast conditions of concrete in marine environment were simulated. It is found that blending of Types I and II cement with VA (between 10 and 20%) has shown better resistance against seawater attack than Type V cement with low . The performance of VA based concrete mixtures is assessed based on the strength reduction criteria and is supported by data from rapid chloride permeability, porosity, and differential scanning calorimetry tests. It is recommended that Type I cement with VA content between 10 and 20% would be a better choice in a marine environment. Results also showed that the use of precasting could mitigate the deleterious effect of marine environment on concrete specimens considerably rather than casting in situ.
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Acknowledgments
The writer is grateful to the Papua New Guinea University of Technology and other local and provincial authorities of Papua New Guinea (PNG) for providing financial assistance in this project. He is also grateful to the technical staffs of the materials laboratory of the Department of Civil Engineering and National Analysis Laboratory. Sincere thanks also go to the PNG Halla Cement Factory, the PNG Department of Works, and the PNG Ready Mixed Concrete Co. Ltd. for their assistance.
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 17 • Issue 6 • December 2005
Pages: 694 - 702
Copyright
© 2005 ASCE.
History
Received: Mar 2, 2004
Accepted: Apr 8, 2005
Published online: Dec 1, 2005
Published in print: Dec 2005
Notes
Note. Associate Editor: Zhishen Wu
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