Influence of Temperature on the Mechanical Properties of Modified Low Exothermic Polyurethane Grouting Material and Engineering Applications
Publication: Journal of Materials in Civil Engineering
Volume 35, Issue 11
Abstract
Low exothermic polyurethane grouting material, as a new type of material, is used for road reinforcement and repair engineering in frozen earth areas. This study investigates the mechanical properties of this grouting material under different ambient temperatures. The effects of temperature and density on the expansion pressure, compressive strength, and tensile strength of the materials were determined in this study. The characteristics of the material’s stress–strain curves were analyzed microscopically. The results demonstrate that temperature significantly influenced the material properties. The expansion properties of the material decreased with decreasing temperature. In contrast, the tensile and compression properties of the material increased with decreasing temperature, which is shown in the tensile and compressive strengths. From the view of failure mode, lower temperature makes the material more brittle. Moreover, the constitutive model based on the temperature variation was established according to the experimental results. This provides a basis for a simple evaluation of the compressive strength and elastic modulus of materials. Finally, the mechanical response of road cavitation in cold areas before and after repair was analyzed through finite-element numerical simulation and full-scale model test. The low exothermic polyurethane grouting material effectively reduced the vertical deformation of the wheel load in the distressed area. This study provides a reference for road reinforcement and repair projects in cold regions.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article.
Acknowledgments
The research presented in this work was supported in part by the National Natural Science Foundation of China (Grant Nos. 51878622 and 51878624), Henan Science Fund for Distinguished Young Scholars (Grant No. 202300410354), and Funding Program for Key Scientific Research Projects of Higher Education Institutions in Henan Province (Grant No. 22A580004). The Central Plains talent program—Leading Talents in Basic Research in Central Plains.
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Published In
Journal of Materials in Civil Engineering
Volume 35 • Issue 11 • November 2023
Copyright
© 2023 American Society of Civil Engineers.
History
Received: Oct 12, 2022
Accepted: Mar 15, 2023
Published online: Aug 23, 2023
Published in print: Nov 1, 2023
Discussion open until: Jan 23, 2024
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