PCM-optimised wheat straw fibre cement composite bricks
Description
This study hypothesises that combining organic phase-change materials with wheat straw fibres can significantly enhance the thermal storage capacity and thermal inertia of cement-based bricks, whilst maintaining good mechanical properties. The data demonstrate the effects of different composite processes (dry mixing and pre-impregnation), five types of PCM, and different loading levels on the microstructure, mechanical properties, and thermal properties of the materials. Notable findings include: composite bricks prepared using the pre-impregnation process exhibited a compressive strength of up to 18.93 MPa, a heat storage coefficient of 26.31 W/(m²·K), and a phase change enthalpy of 15.68 J/g; SEM-EDS analysis confirmed that the PCM was uniformly distributed within the straw bundles, with reduced porosity and dense interfacial bonding. The data were interpreted through a comparative analysis of the mechanical strength, thermal storage coefficient, TG-DSC curves and microstructure of each group, revealing the structure-property relationship between the PCM composite method and material performance.
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Institutions
- Inner Mongolia University of TechnologyInner Mongolia, Hohhot