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Method for prefabricating cement-based sample crack, prefabricated sample and prefabricating system

A cement-based and test-piece technology, which is applied in the field of prefabricated cement-based specimen cracks, prefabricated specimens and prefabricated systems, can solve the problems that the morphology is very different, and the size and position of the cracks cannot meet the needs well.

Active Publication Date: 2017-11-28
SHENZHEN UNIV
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Problems solved by technology

[0004] In order to solve the above problems, the method of prefabricating notches can be used to induce cracks, but this method can only control the starting position of the cracking of the specimen and the extent of crack propagation. Approximate area
Cement-based material is a brittle material. Once it cracks, the crack will develop rapidly and form a penetrating crack, so the size and position of the crack produced by this method still cannot meet the needs well.
In addition, in the prior art, there is also a method of manufacturing artificial cracks by pre-embedding steel sheets and then pulling them out, but the cracks formed by this method are far from the appearance of the actual stress cracks

Method used

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  • Method for prefabricating cement-based sample crack, prefabricated sample and prefabricating system
  • Method for prefabricating cement-based sample crack, prefabricated sample and prefabricating system

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[0043] In order to make the object, technical solution and effect of the present invention more clear and definite, the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0044] see figure 1 , which is a side view of the prefabricated specimen used for prefabricating the cracks of the cement-based specimen provided by the present invention. Side cement base 10. Please also refer to figure 2 , the configuration network 20 is a rectangular grid configuration network, which includes an encrypted area 21 and a reserved weak area 22 located in the encrypted area 21, and the network wires in the reserved weak area 22 are removed And forming a fracture, the side of the prefabricated test piece is located at the two sides of the fracture and is provided with a ma...

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Abstract

The invention discloses a method for prefabricating a cement-based sample crack, a prefabricated sample and a prefabricating system. A configuration net which can form a fracture through removing net wires so as to produce a weak area is manufactured, and is put in the prefabricated sample during a process of casting to form the prefabricated sample, so that when the prefabricated sample is loaded by a pressure testing machine, not only can a crack size and a crack position of the prefabricated sample be controlled through the configuration net, but also the advantage of enabling the formed crack to get close to a crack produced by real stress cracking of concrete is realized.

Description

technical field [0001] The invention relates to the technical field of self-repairing of cement-based materials, in particular to a method for prefabricating cracks in a cement-based test piece, a prefabricated test piece and a prefabricated system. Background technique [0002] Cement-based materials are the most widely used materials in modern building materials, especially concrete materials. Finding ways to improve the durability of cement-based materials is of great significance for improving the service performance of buildings, which is also a research hotspot in civil engineering materials. Improving the overall performance of building structures by endowing cement-based materials with self-healing properties has been widely recognized as a development trend in the field of international concrete materials and structures, which is also in line with China's strategic development direction. [0003] In the self-healing research of cement-based materials, especially fo...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28
CPCG01N1/286
Inventor 王险峰方成韩宁旭邢锋
Owner SHENZHEN UNIV
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