Method for keeping ambient temperature of concrete constraint stress equipment constant

Abstract

The invention provides a method for keeping the environment temperature of concrete constraint stress equipment constant, which comprises the following steps: designing an environment box according to the size of the concrete constraint stress equipment, and arranging the concrete constraint stress equipment in the environment box; arranging a temperature control system in the environment box, so that the temperature in the environment box is kept constant, wherein the temperature in the environmental box is kept at 20 DEG C. The temperature control system comprises a water cooling system and an air cooling system. According to the invention, the temperature in the environment box is kept constant by controlling the temperature in the environment box, so that the problem of measurement error caused by the change of the temperature of the environment where the test equipment is located is solved, and the accuracy of deformation data measurement of the concrete constraint stress equipment is greatly improved. Meanwhile, the temperature control space range of the test equipment is reduced to the three-dimensional space of the test equipment, so that compared with the traditional overall temperature control of a laboratory, the temperature control device is more reliable, and the realization degree and the precision are higher.

Description

technical field [0001] The invention relates to a method for keeping the ambient temperature of concrete confining stress equipment in a laboratory constant. Background technique [0002] Due to the thick section of the mass concrete structure, the heat generated by the rapid hydration reaction inside the concrete after pouring cannot be dissipated in time, resulting in an increase in the internal temperature of the mass concrete structure. When the temperature rise of the internal concrete reaches its peak value, the temperature difference between the internal temperature and the external environment slowly decreases. At this time, the elastic modulus of the concrete is higher than that of the initial stage, and the creep capacity is weaker. Therefore, the mass concrete structure In the late age stage, tensile stress will be generated due to constraints. Once the tensile stress exceeds the tensile strength of the corresponding age, temperature cracks will occur in the mass ...

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