Investigation of Mechanical Properties, Stiffness, and Flexibility of Cold Recycled Cement-Stabilized Gravel Base Milling Mixes with Foamed Asphalt
Publication: Journal of Materials in Civil Engineering
Volume 35, Issue 12
Abstract
With the growth of service time, semirigid base asphalt pavements have gradually entered the maintenance and reconstruction period. Therefore, the treatment of waste semirigid bases has become an important issue. In this paper, based on the analysis of the properties of cement-stabilized gravel milling material, the waste semirigid base material is cold recycled using foam asphalt. The mechanical properties of the cold recycled mixture of foamed asphalt formed by 100% cement-stabilized gravel milling material (FACRM-CM) were evaluated by splitting strength test, compressive modulus of resilience test, and dynamic modulus test. The softening mechanism of the semirigid base milling material was investigated from a microscopic point of view with the aid of scanning electron microscopy (SEM). The results indicate that FACRM-CM exhibits adequate mechanical strength for use in road base layers. When semirigid base milling materials are cold recycled using foam asphalt, the stiffness of the resulting mixture decreases, whereas its flexibility increases. The results of this research can be applied to the regeneration of semirigid bases, realizing the transformation of the base from rigidity to flexibility and reducing pavement diseases.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
This work was supported by the National Natural Science Foundation of China (No. 51978068) and the Shaanxi Natural Science Foundation (No. 2020JM-217). The authors gratefully acknowledge their financial support.
Author contributions: Qinshi Hu contributed to the conceptualization, methodology, investigation, and writing. Jiupeng Zhang contributed to the supervision and funding acquisition. Yinzhang He contributed to the visualization. Junbo Li contributed to the experimental test. Chuangye Song contributed to the experimental test. Guangcan Li contributed to the resources and data curation.
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Information & Authors
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Published In
Journal of Materials in Civil Engineering
Volume 35 • Issue 12 • December 2023
Copyright
© 2023 American Society of Civil Engineers.
History
Received: Dec 26, 2022
Accepted: Apr 26, 2023
Published online: Sep 25, 2023
Published in print: Dec 1, 2023
Discussion open until: Feb 25, 2024
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