Experimental investigation of thermal and mechanical properties of magnesium oxychloride cement with form-stable phase change material
| Autor: | Chunxi Hai, Weixin Zheng, Xiang Li, Chenggong Chang, Ren Xiufeng, Shen Yue, Xinxing Zhang, Zeng Jinbo, Yuan Zhou |
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| Rok vydání: | 2018 |
| Předmět: |
Cement
Materials science 020209 energy Enthalpy 0211 other engineering and technologies 02 engineering and technology Building and Construction Microstructure Thermal energy storage Phase-change material Thermal conductivity Compressive strength Flexural strength 021105 building & construction 0202 electrical engineering electronic engineering information engineering General Materials Science Composite material Civil and Structural Engineering |
| Zdroj: | Construction and Building Materials. 186:670-677 |
| ISSN: | 0950-0618 |
| Popis: | To increase the heat storage efficiency of the building enclosure structure, form-stable phase change material (FSPCM) was implanted into the magnesium oxychloride cement (MOC) system to generate MOC/FSPCM composites with both high heat storage efficiency and considerable mechanical strength. The microstructure, mechanical properties, hydration process and thermal properties of MOC/FSPCM composites were investigated. The results indicated the structure of MOC was not destroyed and the hydration rate, hydration temperature and total hydration heat also dropped after adding FSPCM. The compressive strength and flexural strength of the MOC/FSPCM composites with 30 wt% FSPCM can still reach to 52.9 MPa and 5.9 MPa, respectively, and the melting and crystallizing enthalpy of MOC/FSPCM composites were 29.91 J/g and 26.52 J/g, respectively. Thermal performance tests indicated that thermal conductivity of MOC/FSPCM composites decreased with the increase in the mass percentage of FSPCM. Meanwhile, MOC/FSPCM composites show excellent performance of indoor temperature regulate, conserve energy and thermal comfort. |
| Databáze: | OpenAIRE |
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