Theoretical and Experimental Studies on Preparation of OMMT-Based Composite Phase Change Materials Used in Asphalt Pavement

Abstract:

With the global warming, phase change materials are being expected to be applied in asphalt pavement to help lower its surface temperature. In this study, a kind of composite phase change material was prepared and its technique parameters were optimized through theoretical analysis and experimental study. A solid-liquid phase change material, with melt point of 43°C and phase transition heat of 161.6J/g, was used as core. The organophilic montmorillonite (OMMT) was used as a carrier and can prevent leakage of the melted phase change materials. The results showed that the ratio of OMMT to lauric acid was 2.6:1, and the melting temperature and time were 74°Cand 1.5hours, respectively. The composite phase change material prepared in this study had the phase transition latent heat of 36.168J/g and the transition temperature of 40.094°C. And the experimental results are in good agreement with theoretical analysis.

• Periodical: Key Engineering Materials (Volume 599)
• Pages: 355-360
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.599.355
• Online since: February 2014
• Authors: Bin Bin Leng, Mei Zhu Chen*, Shao Ping Zheng, Shao Peng Wu
• Keywords: Asphalt Pavement, Composite Phase Change Materials, Lauric Acid, Organic Montmorillonite

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