用应变片测量水泥混凝土热膨胀系数的试验方法

热膨胀系数是评价水泥混凝土热学性能的一项基本参数,在大体积混凝土和超长结构混凝土温度应力计算中起着至关重要的作用。提出了一种用电阻应变片测量混凝土热胀系数的方法并进行了试验研究。用线性回归的方法对试验数据进行分析,得到了混凝土的热胀系数,同时,试验结果也表明,用电阻应变片能够实现对混凝土热膨胀系数的测量。

Test Method of Strain Gauge to Measure Thermal Expansion Coefficient of Cement Concrete

The thermal expansion coefficient is a basic parameter to evaluate the thermal properties of cement concrete,and plays the important role in the temperature stress calculation of the mass concrete and super-long structure.The article puts forward a method of the resistance strain gauge to measure the thermal expansion coefficient of concrete under the testing study.The linear regression method is used to analyze the testing data,and the thermal expansion coefficient of concrete is given.The testing result also shows that the use of resistance strain gauge can realize the measurement of the thermal expansion coefficient of concrete.