Device and method for testing shear bond strength of structural adhesive between reinforcement material and concrete

Abstract

The invention discloses a device and a method for testing shear bond strength of a structural adhesive between a reinforcement material and concrete. The device is characterized by comprising an upper rack arranged at the outer edge of an upper concrete block, and a lower rack arranged at the outer edge of a lower concrete block, wherein a V-shaped bump is arranged in the middle position of the bottom surface of the upper rack; a V-shaped groove is formed in the middle position of the top surface of the lower rack and matched with the V-shaped bump of the upper rack; and the V-shaped bump pivots a certain angle around a contact line inside the groove. The test method comprises the following concrete steps: placing the upper rack on the lower rack; placing the V-shaped bump into the V-shaped groove and fixing by using a locating strip; sticking the reinforcement material to the side of the block by using the structural adhesive, wherein the sticking area of the reinforcement material on two blocks is equal; dismantling all locating cover boards and all locating strips on one side of each concrete block after the structural adhesive is completely cured; and exerting pressure, so that the concrete blocks have the trend of pivoting around the contact line of the V-shaped bump, so as to generate shear binding power and work out the shear bond strength when the limit value is destroyed.

Description

[0001] This application is a divisional application of a Chinese invention patent application with an application date of November 28, 2012, an application number of 2012104939575, and a Chinese invention patent application titled a device and method for testing the shear bond strength of structural adhesive between reinforcement materials and concrete. technical field [0002] 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 [0003] 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 ma...

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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