Device and method for testing shearing resistance adhesive strength of structural adhesive between reinforcement material and concrete

Abstract

Provided is a device and method for testing shearing resistance adhesive strength of structural adhesive between a reinforcement material and concrete. The device is characterized by comprising an upper hanging support arranged at the outer edge of an upper concrete testing block and a lower hanging support arranged at the outer edge of a lower concrete testing block. A V-shaped protrusion is arranged in the middle of the bottom face of the upper hanging support, a V-shaped groove matched with the V-shaped protrusion of the upper hanging support is arranged in the middle of the top face of the lower hanging support, and the V-shaped protrusion rotates for a certain angle in pivoted mode around a contact line in the groove. The testing method includes the detailed steps that the upper hanging support is arranged on the lower hanging support, and the V-shaped protrusion is arranged in the V-shaped groove and fixed through locating strips; and the reinforcement material is adhered to lateral sides of the testing blocks through the structural adhesive, and adhesive area of the reinforcement material on the two testing blocks is equal. After the structural adhesive is fully cured, all locating cover plates and all locating strips on one sides of the concrete testing blocks are dismantled, and pressure is exerted to enable the concrete testing blocks to have rotation tendency around the V-shaped protrusion in pivoted mode, so that shearing adhesive power is generated, when a limit value is reached and the adhesion is damaged, the shearing resistance adhesive strength can be calculated.

Description

technical field [0001] The invention is mainly used in the field of construction science and technology, and in the reinforcement and transformation of concrete structures, the device and method for testing the shear bond strength of structural glue bonding reinforcement materials and concrete substrates. Background technique [0002] In the reinforcement and renovation project of concrete structure engineering, there are technical measures that need to paste reinforcement materials such as steel plates and composite reinforcing fibers on the concrete substrate. Such measures use structural glue to paste the reinforcement material on the concrete matrix, give full play to the characteristics of high tensile strength of the reinforcement material, and achieve the purpose of reinforcement. The key to this technology lies in the coordinated deformation and joint stress of the reinforcement material and the concrete matrix. The coordinated deformation between the two is complete...

AI Technical Summary

Problems solved by technology

However, this invention patent can only detect the bonded shear strength of reinforcement materials with a certain thickness. It is necessary for the force transmission shoe to resist and push the slab to cause shear failure between it and the concrete substrate. For the slab with a small thickness ( 1~2mm) and fiber cloth (0.111~0.167mm) and other reinforcing materials, since it is difficult for the force transmission boots to only touch the reinforcing material without contacting the concrete, it is often impossible to push the slats or fiber cloth to cause shear failure. The use of the method has certain limitations; when using this invention patent, the reinforcement material is subjected to pressure, which is inconsistent with the tension in the actual project; when using this invention patent, the reinforcement material needs to be cut, not only the reinforcement material and the reinforced material There is some damage to the component, and the high temperature generated during cutting will affect the performance of the bonding material and affect the test results

Therefore, this invention patent cannot fully adapt to the test of the shear bond strength of the structural adhesive between the reinforcement material and the concrete

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