混凝土湿热传导与湿热扩散特性试验研究(Ⅰ)——试验设计原理

Experimental Study on Thermal Conductivity and Thermal Diffusivity of Moist Concrete(Ⅰ)--Design Pinciple of Experimental Device

了解不同含湿状态下混凝土的热物性与湿物性 ,对研究混凝土坝在不同时期的温度控制与表面保护措施具有重要意义 论述了“常功率平面热源法”测定混凝土湿热传导与湿热扩散特性的原理和方法 ,对影响测试精度的各个参数进行了误差传递分析 ,讨论了进行加热片热容修正的必要性 ,使整个试验能在设计的试验精度范围内展开 。

It is important to understand the thermal properties and moisture properties of concrete under different relative humidity so as to control its temperature as well as to take surface protection during its lifespan The principles and test methods to measure the thermal conductivity and thermal diffusivity of moist concrete using stable power plane heater,are described And some error transfer relationships in the test for several factors are analyzed Based on analysis,it is necessary to modify the thermal parameters of concrete because of heat capacity of the heater so that to control the precision of the results