Low-temperature and ultralow-temperature thermal deformation transient type test device and method for concrete

Abstract

The invention discloses a low-temperature and ultralow-temperature thermal deformation transient type test device and method for concrete. The device comprises a cooling medium storage tower, a low-temperature heat preservation box, a displacement sensor, a deformation recording system connected with the displacement sensor, and a temperature recording system, wherein the cooling medium storage tower is communicated with the inner part of the low-temperature heat preservation box through a cooling medium spraying pipe; an electromagnetic valve is arranged on the cooling medium spraying pipe; an electronic valve is connected with a temperature control system; a first temperature sensor is arranged in the temperature control system, penetrates through the side wall of the low-temperature heat preservation box and extends into the low-temperature heat preservation box. By the adoption of a three-dimensional two-end method, the deformation condition of a concrete test piece along with the temperature change is continuously traced within the range of 20-(-250) DEG C at the cooling speed of 0-20 DEG C / min; the operation is convenient, and the deformation, which is caused by cooling of the concrete test piece, can be precisely traced; the test precision and the data accuracy are guaranteed. The low-temperature and ultralow-temperature thermal deformation transient type test device can be widely applied to thermal deformation transient type tests of the concrete.

Description

technical field [0001] The invention relates to a concrete thermal deformation transient testing device and method. Background technique [0002] As one of the most important clean energy sources, liquefied natural gas (LNG) has been widely used all over the world. Since the liquefaction temperature of LNG is -165°C, its storage conditions are very harsh. At present, the terminal tower for storing LNG is mainly based on the synergistic structure of the inner steel sealing layer and the outer reinforced concrete protective layer. Therefore, in order to ensure that the concrete used can meet the quality requirements, it is necessary to study the temperature deformation of the concrete used in the ultra-low temperature environment. [0003] At present, when domestic and foreign scholars design the temperature deformation test of concrete in low-temperature or ultra-low temperature environments, they consider that the sensor cannot work normally in ultra-low temperature environ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a concrete low-temperature and ultra-low temperature thermal deformation transient test device and method, to solve the technical problems of insufficient test accuracy and inaccurate test data of concrete thermal deformation transient test; and to ensure that the test process is simple and easy The problem

Images