Models for estimating the thermal properties of electric heating concrete containing steel fiber and graphite
Models for estimating the thermal properties of electric heating concrete containing steel fiber and graphite
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DOI：
10.1016/j.compositesb.2018.11.053
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发表时间：
2019-05
期刊：
影响因子：
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通讯作者：
R. Rao;Hanfa Wang;Haihong Wang;C. Tuan;M. Ye
中科院分区：
文献类型：
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作者：
R. Rao;Hanfa Wang;Haihong Wang;C. Tuan;M. Ye
本文介绍了一种用于室外融雪和室内辐射采暖的专用钢纤维石墨电热混凝土（SGEHC）的热工性能试验研究。实验测定了SGEHC的密度、比热容和导热系数。结果表明，SGEHC是一种孔隙率为11.7%的多孔材料，孔隙率对SGEHC的密度、导热系数有较大影响，但对比热容影响不大。将SGEHC看作由钢纤维、石墨、普通混凝土和空气组成的四相复合材料，可以并联和串联导热，提出了SGEHC的密度模型和导热系数模型。结果表明，预测结果与实验结果吻合较好。
This paper presents an experimental investigation for thermal properties of a specialized electric heating concrete containing steel fiber and graphite (SGEHC) which is a specialized concrete used for outdoor snow melting and indoor radiant heating. Experiments were carried out to determine the density, special heat capacity and thermal conductivity of the SGEHC. It shows that the SGEHC is a porous material with 11.7% porosity ratio, which has a great influence on the density, thermal conductivity of the SGEHC but limited effect on its specific heat capacity. Accordingly, a density model and a thermal conductivity model were proposed by treating the SGEHC as a four phases composite made of steel fiber, graphite, regular concrete and air, which could conducts heat in both parallel and series. It shows that the predicted results are in good agreement with the experimental results.