Thermoregulation Performance and Mechanical Properties of Phase Change Asphalt Mortars
Publication: Journal of Materials in Civil Engineering
Volume 36, Issue 8
Abstract
This study investigated the effects of a diatomite/tetradecane composite shaped phase change material (CSPCM) on the mechanical properties and thermoregulation performance of styrene-butadiene-styrene (SBS)- and styrene-butadiene-styrene/crumb rubber (SBS/CR)-modified asphalt binders. The heat transfer and latent heat characteristics of phase change asphalt mortars (PCAMs) were analyzed using a thermal constant analyzer and differential scanning calorimeter. Furthermore, a thermoregulation test was devised to confirm the temperature-regulating characteristics of PCAMs. The rheological properties of PCAMs were analyzed using the dynamic mechanical analysis (DMA) method, and low-temperature fracture characteristics were evaluated using the single edge notched beam (SENB) test. The results indicated that the incorporation of CSPCM decreased the thermal conductivity and thermal diffusivity of SBS- and SBS/CR-modified asphalt binders but increased their specific heat capacity. CSPCM can be stably present in modified asphalt and still have good phase change properties in the phase change temperature range, as well as the temperature regulation effect of PCAMs is excellent. The melting enthalpy for the PCAMs was as high as . Compared to the modified asphalts, the heating time of the PCAMs increased by up to 34.1% as the dosage of CSPCM gradually increased. The incorporation of CSPCM enhanced the viscous components of modified asphalt binders, improved intermediate-temperature fatigue resistance and low-temperature fracture resistance, and reduced high-temperature permanent deformation resistance.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article.
Acknowledgments
This work was supported by the National Second Qinghai-Tibet Scientific Expedition Special Project of China (Grant No. 2021QZKK0205), the National Natural Science Foundation of China (Grant Nos. 52278447 and U20A20315), and the Outstanding Youth Fund of Heilongjiang Province (Grant No. YQ2021E032). The authors gratefully acknowledge their financial support.
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 36 • Issue 8 • August 2024
Copyright
© 2024 American Society of Civil Engineers.
History
Received: Sep 28, 2023
Accepted: Jan 23, 2024
Published online: May 23, 2024
Published in print: Aug 1, 2024
Discussion open until: Oct 23, 2024
ASCE Technical Topics:
- Binders (material)
- Building materials
- Composite materials
- Engineering fundamentals
- Engineering materials (by type)
- Engineering mechanics
- Material mechanics
- Material properties
- Materials engineering
- Measurement (by type)
- Mechanical properties
- Mortars
- Temperature (by type)
- Temperature effects
- Temperature measurement
- Thermal properties
- Thermodynamics
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