Concrete axial tension fixed-section breaking device and method

Abstract

The invention discloses a concrete axial tension fixed-section breaking device and method. The concrete axial tension fixed-section breaking device comprises a base, a drive mechanism, a clamping groove and a clamping mechanism; by putting a concrete specimen in the clamping groove as well as fixing the drive mechanism and supporting the clamping groove through the base, through clamping and fixing of the clamping mechanism, a broken surface is positioned; the clamping groove is driven by the drive mechanism to perform rotary tensioning breaking; and data is recorded through a laser device. The concrete axial tension fixed-section breaking device provided by the invention overcomes the problem that the randomness at the broken part of the original specimen is large to cause inaccurate testdata, has the characteristics of simple structure, realizing of fixing of the broken section of the specimen at a fixed point, reduction in the influence of random error and capability of accuratelycalculating the tensile strength of the concrete and the method is precise in positioning the section, convenient to operate and accurate in specimen data.

Description

technical field [0001] The invention belongs to the technical field of concrete tests, and relates to a concrete axial tensile constant section fracture device and method. Background technique [0002] At present, the main testing methods for the tensile strength of concrete are bending tensile test, splitting tensile test and axial tensile test. Compared with bending and splitting tests, the axial tensile test can more accurately reflect the real tensile strength of concrete, and can directly obtain the tensile properties of the material, without assumptions and complicated calculations to analyze the axial tensile stress-strain of the material backward curve. Although the test data and result processing of the axial tension test are straightforward, due to the difficulty in clamping the specimen and easy eccentric loading, the axial tension test has certain difficulties in ensuring the uniform distribution of the tensile stress in the section and the stability of the test...

AI Technical Summary

Problems solved by technology

Although the test data and result processing of the axial tension test are straightforward, due to the difficulty in clamping the specimen and easy eccentric loading, the axial tension test has certain difficulties in ensuring the uniform distribution of the tensile stress in the section and the stability of the test. The experiment itself is difficult to design and difficult to actually conduct

Especially in actual engineering, it is difficult to do axial tensile strength test of concrete

[0003] In addition, in the current axial tensile test, the fracture surface of the concrete sample is randomly distributed, and a fixed section cannot be determined, which further increases the test error

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