Device and method for testing early thermal expansion coefficient of concrete based on suspension method

Abstract

The invention relates to a device and a method for testing an early thermal expansion coefficient of concrete based on a suspension method. The device comprises a corrugated pipe test mould for pouring concrete to be tested to form a concrete corrugated pipe test piece, a plurality of rope rings for suspending the concrete corrugated pipe test piece, a device base for suspending the rope rings, a temperature measurement device used for measuring the temperature change of the concrete in the corrugated pipe test mould and having the measurement end of a first thermocouple wire buried in the corrugated pipe test mould, a deformation measurement device for measuring the deformation amount of the concrete corrugated pipe test piece, and a temperature control box used for adjusting the temperature of a test environment and in which a suspension position of the concrete corrugated pipe test piece is located. According to the method, the concrete corrugated pipe test piece is suspended by adopting the device to measure the early thermal expansion coefficient of the concrete. According to the test device and the test method, the friction between the test piece and the test device is effectively reduced, the test precision is improved, the operation is simple, and the using effect is good.

Description

technical field [0001] The invention relates to the technical field of measuring the thermal expansion coefficient of concrete, in particular to a testing device and a testing method for the early thermal expansion coefficient of concrete based on a suspension method. Background technique [0002] Early cracking often occurs in concrete structures, which will affect the safety and service life of concrete structures. Studies have shown that the thermal expansion coefficient of early concrete varies greatly, and it is unreasonable to ignore the time dependence of the thermal expansion coefficient. If the early concrete thermal expansion coefficient cannot be accurately measured, the early cracking mechanism of high performance concrete will not be clear. Through the research and development of early-stage concrete thermal expansion coefficient measurement instruments and methods, the study of early-age concrete thermal expansion coefficient is of great significance for preven...

AI Technical Summary

Problems solved by technology

However, the curing test barrel cannot be deformed together with the specimen, and it also has a certain impact on heat conduction, which affects the test accuracy

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