Concrete crack resistance testing device with variable constraint degree and testing method

Abstract

The invention discloses a concrete crack resistance testing device with the variable constraint degree and a testing method. The testing device comprises a concrete mold with an inner ring and an outer ring, and an annular concrete cavity is formed between the inner ring and the outer ring. The testing device is characterized by comprising a constraint controller, the constraint controller comprises a heat source and a temperature control heating cavity which enables the inner ring heated by the heat source to swell and act on the inner surface of concrete, and the temperature control heating cavity is located in the inner ring. Compared with the prior art, the concrete crack resistance testing device is simple in structure, convenient to disassemble and reusable. The constraint degree of the inner ring can be changed according to presetting, the crack time of the concrete is greatly shortened, the concrete crack resistance is evaluated by comparing difference of the crack time of the concrete, and the whole device can form a self-circulation system and save energy. The concrete crack resistance testing device is suitable for determining early-stage concrete crack resistance for scientific researches and construction sites and has wide application prospects.

Description

[0001] background field [0002] The invention relates to a concrete crack resistance test device and a test method with a variable constraint degree, which belong to the field of concrete construction. Background technique [0003] In recent decades, cracking of small-sized concrete structures such as cast-in-place concrete floors, beams, and basement walls has occurred from time to time. The crack resistance of concrete is one of the research hotspots in the field of civil engineering. Traditional experimental research focuses on the basic mechanical properties of concrete such as compressive strength, tensile strength, and elastic modulus. However, there is no unified and effective evaluation method for crack resistance. Therefore, the test device for testing the crack resistance of concrete is studied. has practical significance. [0004] At present, the commonly used test methods mainly include the plate method, the ring method and the uniaxial restraint method, among w...

AI Technical Summary

Problems solved by technology

However, the traditional ring test device provides less constraints and the constraint degree is not variable, the concrete is not easy to crack, the sensitivity is poor, and the test cycle is often very long, which seriously affects the efficiency and accuracy of the test

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