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Investigation on thermophysical properties of reactive powder concrete 被引量:13

Investigation on thermophysical properties of reactive powder concrete
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摘要 The thermophysical properties,such as thermal conductivity,thermal diffusivity,specific heat capacity and linear thermal expansion of reactive powder concrete(RPC) with different steel fiber volumetric fractions are investigated by means of high temperature tests. The thermophysical characteristics of RPC with different fiber volumes under different temperatures are analyzed and compared with those of the common high-strength concrete and high-performance concrete. The empirical relationships of thermophysical properties with temperature and fiber volume are identified. By the heat transfer and solid physics methods,the microscopic physical mechanism of heat transfer process and heat conduction properties of RPC are investigated,and the theoretical formulas of specific heat capacity and thermal expansion coefficient are derived,respectively. The effects of temperature and steel fibers on the specific heat capacity and the thermal expansion coefficient are quantitatively analyzed and the discriminant conditions are provided. It is shown that the experimental results are consistent with the theoretical prediction.
出处 《Science China(Technological Sciences)》 SCIE EI CAS 2011年第12期3382-3403,共22页 中国科学(技术科学英文版)
基金 supported by the National Natural Science Foundation of China (Grant No. 50974125) the National Basic Research Program of China ("973" Project) (Grant Nos.2010CB226804,2002CB412705) the Beijing Key Laboratory Projects
关键词 reactive powder concrete (RPC) thermophysical properties high temperature fiber reinforcement heat conduction specific heat capacity thermal expansion coefficient 活性粉末混凝土 热物理性质 纤维体积分数 线性热膨胀 高性能混凝土 高强度混凝土 传热过程 热物理性能
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