A test device and test method for concrete crack resistance with variable constraint degree

A technology of anti-crack performance and testing equipment, which is applied in the field of concrete construction, can solve the problems of affecting the efficiency and accuracy of the test, the degree of constraint is not variable, and the test cycle is long, etc., and achieve the effect of simple assembly, improved experimental efficiency, and fewer instruments

Active Publication Date: 2016-08-24
NANJING CONSTR ENG GRP
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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

Method used

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  • A test device and test method for concrete crack resistance with variable constraint degree
  • A test device and test method for concrete crack resistance with variable constraint degree
  • A test device and test method for concrete crack resistance with variable constraint degree

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Embodiment Construction

[0026] Below in conjunction with accompanying drawing, the present invention will be further described:

[0027] A test device for concrete crack resistance with variable degree of restraint. It consists of a circular concrete mold part and a constraint controller part, such as figure 2 As shown, the concrete mold part is composed of a bottom plate 1, an outer ring 2 and an inner ring 3. The restraint controller section includes a temperature-adjustable heat source and a temperature-controlled heating chamber. Heat source can adopt water, gas or other ways, also can directly control the heating in the heating chamber with the temperature that heater inner ring 3 forms.

[0028] Such as figure 1 As shown, the present embodiment uses water as a heat source, and describes the constraint controller part of the present invention in detail: the temperature control heating chamber 4 is an annular water tank, and there are water inlet 5 and water outlet 6 on the annular water tan...

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Abstract

The invention discloses a test device and a test method for the crack resistance performance of concrete with a variable constraint degree. Wherein the test device includes a concrete mold with an inner ring and an outer ring, a circular cavity of concrete is formed between the inner ring and the outer ring, and is characterized in that it also includes a constraint controller, which includes a heat source and a The heat source heats the inner ring to expand and acts on the temperature-controlled heating cavity on the inner surface of the concrete, and the temperature-controlled heating cavity is located in the inner ring. Compared with the prior art, the invention has the advantages of simple structure, convenient disassembly and reusability. The device can change the constraint degree of the inner ring according to the preset setting, greatly shorten the concrete cracking time, and evaluate the anti-cracking performance of the concrete by comparing the difference in the concrete cracking time, and the whole set of devices can form a self-circulation system to save energy. It is suitable for the determination of the early crack resistance of concrete in scientific research and construction sites, and has broad 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/38
Inventor 姜国庆何瑞张怡逯绍慧
Owner NANJING CONSTR ENG GRP
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