TY - JOUR
T1 - Preparation, microstructure, performance and mortar application of paraffin/titanium-bearing blast furnace slag phase change aggregate
AU - Jiang, Jun
AU - Lei, Luo
AU - Jin, Chao
AU - Liu, Tie
AU - Huang, Jinqiao
AU - Wu, Yanping
AU - Lv, Shuzhen
AU - Lu, Zhongyuan
AU - Zheng, Li
AU - Li, Jun
N1 - Funding Information:
Authors would like to acknowledge the funding from Ningbo Science and Technology Planning Project ( 2022T003 ), Natural Science Foundation of Sichuan Province ( 2022NSFSC1135 ) and the Open Project of State Key Laboratory of Environment-friendly Energy Materials ( 19kfhg16 ).
Publisher Copyright:
© 2023 The Authors
PY - 2023/12
Y1 - 2023/12
N2 - The application of phase change materials (PCM) in building energy saving is limited by the cost and performance of PCM carriers. Using solid waste as a PCM carrier can reduce cost and environmental impacts. In this study, lightweight and porous titanium-bearing blast furnace slag (Ti-BFS) was innovatively used as PCM carrier to prepare paraffin/Ti-BFS phase change aggregate (PTA) by vacuum impregnation, and then PTA was used to develop thermal energy storage cement mortar by replacing sand. The microstructure and performance of aggregate and mortar were also investigated. The results indicated that PTA has a paraffin loading rate of 21.9%, latent heat of 65.7 J/g for melting and 65.0 J/g for freezing, and good chemical compatibility. The microstructure reveals that PTA has good compatibility with cement matrix. Compared with ordinary cement mortar, a reduction percentage of 28-day compressive strength, dry density and thermal conductivity at 100% PTA substitution rate are respectively 39.8%, 29.1% and 52.5%. However, a significant capacity to weaken temperature fluctuation was observed.
AB - The application of phase change materials (PCM) in building energy saving is limited by the cost and performance of PCM carriers. Using solid waste as a PCM carrier can reduce cost and environmental impacts. In this study, lightweight and porous titanium-bearing blast furnace slag (Ti-BFS) was innovatively used as PCM carrier to prepare paraffin/Ti-BFS phase change aggregate (PTA) by vacuum impregnation, and then PTA was used to develop thermal energy storage cement mortar by replacing sand. The microstructure and performance of aggregate and mortar were also investigated. The results indicated that PTA has a paraffin loading rate of 21.9%, latent heat of 65.7 J/g for melting and 65.0 J/g for freezing, and good chemical compatibility. The microstructure reveals that PTA has good compatibility with cement matrix. Compared with ordinary cement mortar, a reduction percentage of 28-day compressive strength, dry density and thermal conductivity at 100% PTA substitution rate are respectively 39.8%, 29.1% and 52.5%. However, a significant capacity to weaken temperature fluctuation was observed.
KW - Expanded titanium-bearing blast furnace slag
KW - Leakage
KW - Phase change material
KW - Stability
KW - Thermal energy storage cement mortar
UR - http://www.scopus.com/inward/record.url?scp=85163971002&partnerID=8YFLogxK
U2 - 10.1016/j.cscm.2023.e02262
DO - 10.1016/j.cscm.2023.e02262
M3 - Article
AN - SCOPUS:85163971002
SN - 2214-5095
VL - 19
JO - Case Studies in Construction Materials
JF - Case Studies in Construction Materials
M1 - e02262
ER -