TY - JOUR
T1 - Development of structural thermal energy storage concrete using paraffin intruded lightweight aggregate with nano-refined modified encapsulation paste layer
AU - Afgan, Sher
AU - Khushnood, Rao Arsalan
AU - Memon, Shazim Ali
AU - Iqbal, Naseem
N1 - Funding Information:
This study was financed by NUST Institute of Civil Engineering (NICE) and Nazarbayev University Faculty Development Competitive Research Grant No. 090118FD5316 for which the authors are grateful. Furthermore, expression of gratitude and sincere regards to all the faculty and technical staff, of Institute of Environmental Sciences and Engineering (IESE), Atta-ur-Rahman School of Applied Biosciences (ASAB) and US-Pakistan Center for Advance Studies in Energy (USPCAS-E), for providing assistance and technical support through the entire period of research. Sincere appreciation goes to Dr. Jamal Taheem, Engr. Sara Farooq and Engr. Hafiz Saeed, for their valuable suggestions and guidance.
Funding Information:
This study was financed by NUST Institute of Civil Engineering (NICE) and Nazarbayev University Faculty Development Competitive Research Grant No. 090118FD5316 for which the authors are grateful. Furthermore, expression of gratitude and sincere regards to all the faculty and technical staff, of Institute of Environmental Sciences and Engineering (IESE), Atta-ur-Rahman School of Applied Biosciences (ASAB) and US-Pakistan Center for Advance Studies in Energy (USPCAS-E), for providing assistance and technical support through the entire period of research. Sincere appreciation goes to Dr. Jamal Taheem, Engr. Sara Farooq and Engr. Hafiz Saeed, for their valuable suggestions and guidance.
PY - 2019/12/20
Y1 - 2019/12/20
N2 - Nano-refined epoxy paste is formulated using the optimum fractions of nano-silica fume and graphite powder to effectively encapsulate the aggregate storing phase change materials. The refined recipe offered delays in setting by 3–3.5 hrs accompanied with 15 times reduction in the thickness of coated layer, contributing in added workability, reduced consumption and strong adhesion to the established interfacial bond. The developed macro encapsulated phase change materials were found to be thermally stable, chemically compatible and thermally reliable. The melting and freezing temperatures were determined as 17.12 °C and 32.90 °C respectively with the latent heat storage capacity of 12.6 J/g. The developed thermocrete via 100% integration of macro-encapsulated aggregates showed compressive strength of more than 15 MPa and owed the potential to conserve energy by lowering the internal temperature (6.4 °C), resistance to high fluctuation in temperature while maintaining a narrow range (22 °C−30.2 °C) and by shifting the energy loads during peak periods (15-min).
AB - Nano-refined epoxy paste is formulated using the optimum fractions of nano-silica fume and graphite powder to effectively encapsulate the aggregate storing phase change materials. The refined recipe offered delays in setting by 3–3.5 hrs accompanied with 15 times reduction in the thickness of coated layer, contributing in added workability, reduced consumption and strong adhesion to the established interfacial bond. The developed macro encapsulated phase change materials were found to be thermally stable, chemically compatible and thermally reliable. The melting and freezing temperatures were determined as 17.12 °C and 32.90 °C respectively with the latent heat storage capacity of 12.6 J/g. The developed thermocrete via 100% integration of macro-encapsulated aggregates showed compressive strength of more than 15 MPa and owed the potential to conserve energy by lowering the internal temperature (6.4 °C), resistance to high fluctuation in temperature while maintaining a narrow range (22 °C−30.2 °C) and by shifting the energy loads during peak periods (15-min).
KW - Macro-encapsulated phase change materials
KW - Nano-silica fume
KW - Paraffin
KW - Phase change materials
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U2 - 10.1016/j.conbuildmat.2019.116768
DO - 10.1016/j.conbuildmat.2019.116768
M3 - Article
AN - SCOPUS:85071399767
VL - 228
JO - Construction and Building Materials
JF - Construction and Building Materials
SN - 0950-0618
M1 - 116768
ER -