Microstructure and Fatigue Performance of Polyurethane Grout Materials under Compression
Publication: Journal of Materials in Civil Engineering
Volume 29, Issue 9
Abstract
Polyurethane materials can be used for nondestructive maintenance of infrastructure, such as slab lifting through injection in a road or railway. Understanding the mechanical behavior and microstructure characteristics of this material is critical to ensure safe service of the infrastructure. This study investigates stress-strain behavior, microstructure characteristics, fatigue behavior, and failure mode of rigid polyurethane grout materials subject to both static and cyclic compressive loads. The densities of the investigated polyurethanes range from 80 to , which are normally used in grouting. The yielding stress corresponding to 5% strain is measured and predicted based on the microstructure characteristics. The fatigue process of polyurethane can be divided into elastic, incubation, and failure stages. The failure threshold is identified for polyurethanes with different densities and at different stress levels. The failure mode is described based on the microstructure observation.
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Acknowledgments
The authors would like to say thank you for the support received from the National Key Research and Development Plan (2016YFC0802402), and Foundation and Advanced Technology Research Program of Henan Province (Grant No. 142300413205).
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Information & Authors
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Published In
Journal of Materials in Civil Engineering
Volume 29 • Issue 9 • September 2017
Copyright
©2017 American Society of Civil Engineers.
History
Received: Jul 12, 2016
Accepted: Jan 25, 2017
Published ahead of print: Apr 18, 2017
Published online: Apr 19, 2017
Published in print: Sep 1, 2017
Discussion open until: Sep 19, 2017
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