TY - JOUR
T1 - Enhanced performance of high temperature aluminate cementitious materials incorporated with Cu powders for thermal energy storage
AU - Yuan, Huiwen
AU - Shi, Yu
AU - Lu, Chunhua
AU - Xu, Zhongzi
AU - Ni, Yaru
AU - Lan, Xianghui
N1 - Publisher Copyright:
© 2014 Elsevier Ltd.
PY - 2015/1
Y1 - 2015/1
N2 - Cementitious materials have been extensively developed in thermal energy storage system of solar thermal power. This paper deals with the volume heat capacity, thermal conductivity, thermal expansion coefficient, and compressive strength of aluminate cementitious thermal energy storage materials with the addition of metal Cu powders. The specimens were subjected to heat-treatment at 105, 350, and 900 °C, respectively. In the heating process, Cu powders gradually oxidized to Cu2O and CuO, providing a so-called mass compensation mechanism for the composite paste. Meanwhile, it indicates that volume heat capacity and thermal conductivity both increase with increasing Cu powders content and decrease with the rising temperature. The optimum thermal properties were obtained at 15 wt% Cu powders loading. In addition, Calorimetric Test, XRD, TG-DSC, and MIP are performed for characterizing the hydration rates, the phases, the mass/heat evolution, and the pore distribution, respectively.
AB - Cementitious materials have been extensively developed in thermal energy storage system of solar thermal power. This paper deals with the volume heat capacity, thermal conductivity, thermal expansion coefficient, and compressive strength of aluminate cementitious thermal energy storage materials with the addition of metal Cu powders. The specimens were subjected to heat-treatment at 105, 350, and 900 °C, respectively. In the heating process, Cu powders gradually oxidized to Cu2O and CuO, providing a so-called mass compensation mechanism for the composite paste. Meanwhile, it indicates that volume heat capacity and thermal conductivity both increase with increasing Cu powders content and decrease with the rising temperature. The optimum thermal properties were obtained at 15 wt% Cu powders loading. In addition, Calorimetric Test, XRD, TG-DSC, and MIP are performed for characterizing the hydration rates, the phases, the mass/heat evolution, and the pore distribution, respectively.
KW - Cementitious material
KW - Cu powders
KW - Properties
KW - Thermal energy storage
UR - http://www.scopus.com/inward/record.url?scp=84908093586&partnerID=8YFLogxK
U2 - 10.1016/j.cemconcomp.2014.08.006
DO - 10.1016/j.cemconcomp.2014.08.006
M3 - 文章
AN - SCOPUS:84908093586
SN - 0958-9465
VL - 55
SP - 139
EP - 144
JO - Cement and Concrete Composites
JF - Cement and Concrete Composites
ER -