Thermophysical Properties Characterization of Sulphoaluminate Cement Mortars Incorporating Phase Change Material for Thermal Energy Storage

Xiaoling Cui, Xiaoyun Du, Yanzhou Cao, Guochen Sang, Yangkai Zhang, Lei Zhang and Yiyun Zhu
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Xiaoling Cui: School of Civil Engineering and Architecture, Xi’an University of Technology, Xi’an 710048, China
Xiaoyun Du: School of Civil Engineering and Architecture, Xi’an University of Technology, Xi’an 710048, China
Yanzhou Cao: School of Civil Engineering and Architecture, Xi’an University of Technology, Xi’an 710048, China
Guochen Sang: School of Civil Engineering and Architecture, Xi’an University of Technology, Xi’an 710048, China
Yangkai Zhang: School of Civil Engineering and Architecture, Xi’an University of Technology, Xi’an 710048, China
Lei Zhang: School of Civil Engineering and Architecture, Xi’an University of Technology, Xi’an 710048, China
Yiyun Zhu: School of Civil Engineering and Architecture, Xi’an University of Technology, Xi’an 710048, China

Energies, 2020, vol. 13, issue 19, 1-17

Abstract: Efficient use of solar energy by thermal energy storage composites and utilizing environmentally friendly cementitious materials are important trends for sustainable building composite materials. In this study, a paraffin/low density polyethylene (LDPE) composite shape-stabilized phase change material (SSPCM) was prepared and incorporated into a sulphoaluminate cement (SAC) mortar to prepare thermal energy storage mortar. The thermal and mechanical properties of SSPCM and a SAC-based thermal energy storage material (SCTESM) were investigated. The result of differential scanning calorimeter (DSC) analysis indicates that the latent heat of SCTESM is as high as 99.99 J/g. Thermogravimetric analysis demonstrates that the SCTESM does not show significant decomposition below 145 °C. The volume stability test shows the volume shrinkage percentage of the SCTESM is less than that of pure SAC mortar and far less than that of ordinary Portland cement mortar. The SCTESM has high early strength so that the compressive strength at 1-, 3-, and 7-day curing age is up to that at 28-day curing age of 67.5%, 78.3%, and 86.7%, respectively. Furthermore, a mathematical prediction model of the SCTESM compressive strength was proposed. The investigation of latent heat storage characteristics and the thermoregulating performance reveals that SCTESMs have the excellent capacity of heat storage and thermoregulating.

Keywords: thermal energy storage; SAC-based composite; thermophysical property; mechanical property (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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