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Incorporating PCM-enabled thermal energy storage into 3D printable cementitious composites

Journal Article · · Cement and Concrete Composites
This paper delineates the feasibility of incorporating microencapsulated phase change materials (mPCM) into 3D printable cementitious composite materials. A comprehensive experimental program was carried out to evaluate the impacts of mPCM on the printability, microstructures, mechanical and thermal properties of cementitious 3D printing ‘inks’. Results showed that the mPCM affected the printability of the cementitious ink material based on its physical properties (e.g., particle size) and volume loading – at lower volume loadings, mPCM increased the flowability of the cementitious ink material while leading to increased compressive strength and thermal conductivity for the hardened printed material. However, further increase in mPCM dosage led to a decrease in printability and, therefore, decrease in compressive strength and thermal conductivity as compared to the reference mixture. Here the results also showed that the inclusion of mPCM influence the printing parameters. In general, the inclusion of higher volume contents of mPCM necessitates a higher extrusion rate to achieve a desirable extrudability. Lastly, a thermal network model was formulated for 3D printed mPCM charged building components (e.g., wall). The study shows that microencapsulated PCM materials have good potential to be used in 3D printable cementitious mixtures for improving the thermal and energy performance of 3D printed buildings.
Research Organization:
University of Alabama, Tuscaloosa, AL (United States); University of Tennessee, Knoxville, TN (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE); University of Tennessee
Grant/Contract Number:
EE0008677
OSTI ID:
1976934
Journal Information:
Cement and Concrete Composites, Journal Name: Cement and Concrete Composites Journal Issue: C Vol. 129; ISSN 0958-9465
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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