Plastic Shrinkage Cracking Prediction in Cement-Based Materials Using Factorial Design
Publication: Journal of Materials in Civil Engineering
Volume 27, Issue 9
Abstract
Shrinkage cracking is a major issue that affects the durability of concrete structures. Plastic shrinkage of cementitious materials can lead to cracking within 24 h of casting and sets the stage for premature deterioration. Although test techniques exist that can be used to evaluate the plastic shrinkage cracking potential of cement-based materials, mathematical models that predict the influence of various parameters such as water-cement ratio (w/c), aggregate to cement ratio, and the effect of fibers on cracking are not available. This paper presents a model that can be used to predict plastic shrinkage cracking in cement-based materials. The model is developed by using factorial design and utilizes representative data generated with a technique developed by the authors. The effectiveness and limitations of the model in predicting crack areas and width are discussed. The effect of variables such as w/c, sand/cement ratio, fiber dosage, and the interaction between these variables is also presented in this paper.
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Acknowledgments
Financial support from Natural Sciences and Engineering Research Council (NSERC) of Canada for this project is acknowledged. The assistance of various undergraduate and graduate students, including the assistance of the laboratory technicians, is greatly appreciated.
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Published In
Journal of Materials in Civil Engineering
Volume 27 • Issue 9 • September 2015
Copyright
© 2014 American Society of Civil Engineers.
History
Received: May 3, 2014
Accepted: Oct 7, 2014
Published online: Nov 5, 2014
Discussion open until: Apr 5, 2015
Published in print: Sep 1, 2015
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