Simulation testing machine for modified microcracks of medical anti-radiation concrete

Abstract

The invention discloses a medical anti-radiation concrete modified micro-crack simulation testing machine which comprises a multi-crack cracking tensile crack-making wave-transparent test bed, a strain hardening modification stirring mechanism and a structural model dynamic and static bearing test bed, and the strain hardening modification stirring mechanism is arranged on the inner bottom wall of the multi-crack cracking tensile crack-making wave-transparent test bed; and the structure model dynamic and static bearing test bench is fixedly arranged on the side wall of the multi-crack cracking stretching crack-making wave-transparent test bench. The invention belongs to the technical field of concrete testing, and particularly provides a medical anti-radiation concrete modified micro-crack simulation testing machine, which modifies a concrete material through the bridging capability of a fiber material, so that the concrete material has a strain hardening characteristic, and the mechanical property of the concrete material is improved. The anti-cracking performance of the concrete is analyzed and improved through a tensile crack forming test, the interference of a dynamic load test on equipment and the outside world is effectively reduced by means of reverse motion damping, and the analysis of the anti-radiation concrete structure is realized, so that the material performance is further optimized.

Description

technical field [0001] The invention belongs to the technical field of concrete testing, in particular to a micro-crack simulation testing machine for medical radiation-proof concrete modification. Background technique [0002] Concrete micro-cracks (0~100μm in width) are physical structural changes of concrete structures due to the action of internal and external factors, which have a great impact on the mechanical properties and durability of concrete structures. For high equipment, it is necessary to set up a radiation-proof room separately. In the process of building and using the radiation-proof room, it is necessary to strictly control the generation and development of micro-cracks. In the existing technology, radiation-proof coating is often used to conduct radiation-proof treatment on the concrete structure of the radiation-proof room. , and the anti-radiation coating is attached to the surface of the concrete. After the concrete is deformed or micro-cracks are gener...

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Problems solved by technology

[0002] Concrete microcracks (slit width 0~100μm) are due to the physical structure changes of the concrete structure due to internal and external factors, which have a great impact on the mechanical properties and durability of the concrete structure. For high-end equipment, it is necessary to set up a radiation-proof room separately. During the construction and use of the radiation-proof room, the generation and development of micro-cracks must be strictly controlled. In the prior art, radiation-proof coatings are often used to protect the concrete structure of the radiation-proof room. , while the anti-radiation coating is attached to the concrete surface, after the concrete is deformed or micro-cracks occur, it will affect the integrity of the anti-radiation coating

[0003] In the prior art, there is a lack of research on the influence of the proportion of concrete raw materials and the mechanical characteristics of concrete on the micro-cracks. At the same time, the prior art lacks the research on the ability of radiation to penetrate the micro-cracks of radiation-proof concrete. When studying the evolution of micro-cracks, it is necessary to create and preserve micro-cracks in concrete. The use of tensile tests can quickly cause cracks in concrete, but tensile tests can easily break concrete. How to artificially create micro-cracks and analyze the formation of micro-cracks became a big problem

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