Method and device for testing dynamic shear properties of aggregate-mortar transition region

A test device and transition zone technology, applied in the direction of applying stable shear force to test the strength of materials, etc., to achieve the effect of simple structure, high measurement accuracy and cost reduction

Inactive Publication Date: 2011-10-26
HOHAI UNIV
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing concrete aggregate-mortar transition zone test method, and provide a test method and corresponding test device that can accurately measure the dynamic shear mechanical properties of the concrete interface layer at different strain rates

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  • Method and device for testing dynamic shear properties of aggregate-mortar transition region

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Embodiment Construction

[0025] The technical scheme of the present invention is described in detail below in conjunction with accompanying drawing:

[0026] The test device of the present invention is as attached figure 1 As shown, it includes a test platform 1, a first reaction force frame 2, a second reaction force frame 3, a specimen support 4, a specimen fixture 5, a jack 6, a pressure sensor 7, a load testing machine 8, a loading tool 9, Loading plate 10, shear displacement measuring device 11, sensor fixture 12, jack fixture 13;

[0027] Wherein the first reaction force frame 2 and the second reaction force frame 3 are both H-shaped steel frame structures, which are fixed on the test platform 1 by long bolts penetrating through the middle of the steel frame structure, the second reaction force frame 3 and the first reaction force frame Two screw holes are respectively opened symmetrically on the 2, and the two can be rigidly fixedly connected in the horizontal direction by a screw rod.

[002...

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Abstract

The invention discloses a method for testing dynamic shear properties of an aggregate-mortar transition region. The test method comprises the following steps of A, manufacturing a test piece divided into two parts of an aggregate part and a cement mortar part along the axial direction, B, applying an axial load to the test piece, applying shear loads to the test piece and measuring corresponding shear displacements simultaneously, and drawing a shear load-shear displacement curve of an aggregate-mortar interfacial layer of the test piece according to the shear loads and the corresponding shear displacements, wherein the shear displacements occur under the axial load, C, adjusting a value of the axial load and repeating the step B to obtain shear bearing capacities under different axial loads, and D, drawing a shear bearing strength line, wherein axial loads are utilized as abscissa values; shear bearing capacities are utilized as ordinate values; an included angle of the shear bearing strength line and its abscissa axis is equal to an internal friction angle of the aggregate-mortar interfacial layer; and the ordinate axis intercept is equal to a cohesive force of the aggregate-mortar interfacial layer. The invention also discloses a device for testing dynamic shear properties of an aggregate-mortar transition region. Through the invention, dynamic shear mechanical properties of a concrete interfacial layer under different strain rates can be determined accurately.

Description

technical field [0001] The invention relates to a test method and a test device, in particular to a test method and a test device for the dynamic shear performance of an aggregate-mortar transition zone (ie interface layer), which are used for research on the performance of the concrete interface layer. Background technique [0002] Concrete is a heterogeneous multiphase composite material, and its macroscopic mechanical properties depend on the material properties and interactions of the mesoscopic components (aggregate, mortar, interface layer), and the influence of the interface layer on the macroscopic mechanical properties of concrete structures Especially obvious. According to the influence of the interface layer on the macroscopic mechanical properties of concrete, the research on the performance of the interface layer at home and abroad is mainly divided into two categories: tensile performance and shear performance, and the corresponding material tests are tensile t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/24
Inventor 赵海涛吴胜兴王潘绣王瑶陈育志沈德建周继凯王岩黄冬辉潘韡静
Owner HOHAI UNIV
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