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通过人工气候环境的温度控制,研究混凝土内温度响应规律和预计模型.在建立混凝土内温度响应的理论预计模型基础上,开展混凝土升温、降温的响应规律试验研究,通过对混凝土内部温度的实时测量,得出混凝土内部一定深度位置处温度的响应曲线;开展对不同组成混凝土的导热系数测定试验.结果表明:恒定的人工气候环境下,混凝土内温度需要一定时间才能达到与环境温度一致,而且混凝土内温度均在初期响应较快;混凝土导热系数受混凝土水灰比和含水率的影响明显,且影响规律基本服从线性关系.通过理论预计和试验实测的响应曲线比较,证明本文的混凝土温度响应预计模型是可行的.
Through the temperature control of artificial climatic environment, the law of temperature response in concrete and its prediction model are studied.On the basis of establishing the theoretical prediction model of temperature response in concrete, the experiment research on the response law of concrete temperature rise and cooling is carried out. Through the real-time measurement of internal temperature of concrete , The response curve of the temperature at a certain depth inside the concrete is obtained.The experiment on the determination of the thermal conductivity of concrete with different composition is carried out.The results show that the temperature in the concrete takes a certain amount of time to reach the same temperature under a constant artificial climate environment and the concrete The internal temperature is faster in the initial response; the thermal conductivity of concrete is significantly affected by the water-cement ratio and moisture content of concrete, and the impact of the law basically obeys the linear relationship.Compared with the response curves predicted by the theory and experiment, it is proved that the temperature response of the concrete Model is feasible.