Test device and test method of shearing strength of UHPC-NC (Ultrahigh Performance Concrete-Normal Concrete) boning interface

A UHPC-NC, shear strength technology, applied in the field of testing, can solve the problems of large specimen size and difficult to control the normal stress accurately, and achieve the effect of clear force performance, strong repeatability and convenient operation

Inactive Publication Date: 2018-11-06
SOUTHEAST UNIV
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Problems solved by technology

The disadvantages of this test method are that the size of the specimen is large and the normal stress is difficult to control accurately.

Method used

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  • Test device and test method of shearing strength of UHPC-NC (Ultrahigh Performance Concrete-Normal Concrete) boning interface
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  • Test device and test method of shearing strength of UHPC-NC (Ultrahigh Performance Concrete-Normal Concrete) boning interface

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0024] The invention relates to a method for testing the shear strength of the interface of a UHPC-NC laminated component. The test device includes: an upper testing machine press plate 1, an axial pressure device 2, an anti-drop steel wire rope 3, an upper steel fixture 4, and a UHPC- NC laminated specimen 5, lower steel fixture 6, steel roller 7, lower testing machine pressure plate 8. Wherein the laminated specimen 5 is formed by laminating prefabricated ultra-high performance concrete 12 and cast-in-place ordinary concrete 13 .

[0025] The components of the test device are assembled from bottom to top in the order of: lower testing machine platen→steel rollers→lower steel fixtures→laminated specimens→upper steel fixtures→axial pressure device→upper testing machine platen, The laminated test piece 5 is set between the first groove 10 and t...

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Abstract

The invention discloses a test device and a test method of the shearing strength of a UHPC-NC (Ultrahigh Performance Concrete-Normal Concrete) boning interface. The test device comprises an upper testmachine pressure plate, an axial pressure applying device, anti-dropping steel wire ropes, an upper steel fixture, a UHPC-NC laminated test piece, a lower steel fixture, steel roller shafts and a lower test machine pressure plate, wherein the laminated test piece is formed by laminating prefabricated ultrahigh performance concrete and cast-in-place normal concrete. The test device of the shearingstrength of the UHPC-NC boning interface is welded from steel, so that sufficient rigidity and strength of the test device are guaranteed. By the test method of the shearing strength of the UHPC-NC boning interface, a relationship between a normal compressive stress and a shear stress can be intuitively studied. The test device and the test method have the advantages of clear force performance, convenience and fastness in operation, strong repeatability, simple test result analysis and the like, and an effective test method is provided for interface bonding research of an UHPC-NC laminated component.

Description

technical field [0001] The invention belongs to the field of test methods, and in particular relates to a test device for the shear strength of a bonded interface of a UHPC-NC laminated component and a test method thereof. Background technique [0002] Ultra-high performance concrete (UHPC) is a new type of cement-based material with high strength and high durability. However, the price of UHPC material is several times higher than that of ordinary concrete, so it is not suitable for large-scale use. Therefore, the use of UHPC materials in key parts of the structure, or mixed with ordinary concrete (NC), will have a wide range of engineering application prospects. [0003] In order to ensure that UHPC materials can work together with ordinary concrete and form a whole, it is necessary to study the bonding problem between UHPC materials and ordinary concrete. The interface shear strength of UHPC-NC laminated components is an important design index in practical engineering, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/24
CPCG01N3/24
Inventor 卓为顶刘钊袁思奇
Owner SOUTHEAST UNIV
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