Experimental Investigation of Mechanical Properties of Centrifugal Concrete in Circular Pipes
Publication: Journal of Materials in Civil Engineering
Volume 29, Issue 4
Abstract
To investigate the cracking of concrete in reinforced concrete circular pipe culverts, which are mostly manufactured by a process of centrifugal roller suspension, buried more than 5,000 mm under soil, a series of tests were designed to determine the strength of the pipe wall concrete. The experimental results demonstrate that a process of two-step centrifugal molding contributes to greater average concrete strength, better crack resistance, and improved impermeability. Both the tensile and compressive strength of the outer walls are greater using the two-step centrifugal molding than walls constructed using the vertical vibration casting method. The inner wall concrete strength manufactured by one-step centrifugal molding is lower than the strength for concrete using the other two methods. Based on tests and analysis, calculation factors of concrete strengths of the inner and outer pipe walls are proposed. Three-edge-bearing experiments were also carried out to validate the effectiveness of the proposed factors.
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Acknowledgments
The authors wish to express their gratitude and sincere appreciation to Fundamental Research Funds for the Central Universities (2012QNB28) for financing this research work, and also thank Professor Zhi Fang of Hunan University for his valuable help for the experiments.
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Information & Authors
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Published In
Journal of Materials in Civil Engineering
Volume 29 • Issue 4 • April 2017
Copyright
©2016 American Society of Civil Engineers.
History
Received: Nov 20, 2015
Accepted: Jul 29, 2016
Published online: Oct 26, 2016
Discussion open until: Mar 26, 2017
Published in print: Apr 1, 2017
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