On-site rapid non-destructive testing method for adhesive performance of waterproof adhesive layer

Abstract

The invention discloses a fast and non-destructive testing method for the bonding performance of a waterproof adhesive layer on the spot, which includes a bracket, and a cylinder-driven pull rod is arranged on the bracket, and the bottom plate of the pull rod is movably provided with a Marshall test piece. Pulling plate, the pulling rod is provided with a displacement sensor and a pulling pressure sensor; a pair of circular half cylinders connected with the lifting opening and closing mechanism are arranged on both sides of the pulling rod, and a temperature sensor is arranged at the bottom of the circular half cylinder ; A heating base plate driven by a translation mechanism is arranged below the circular half cylinder, and the outer diameters of the heating base plate and the drawing plate are equal to the inner diameter of the circular half cylinder; when the circular half cylinder is closed and both ends pass through the heating base plate and the drawing plate When the plate is pulled out and sealed, the Marshall test piece accommodation cavity is formed. The invention has the advantages of simple structure, convenience and safety, and can greatly improve the efficiency and accuracy of performance detection of the bridge deck pavement waterproof adhesive layer.

Description

technical field [0001] The invention relates to the technical field of performance testing equipment for bridge deck pavement layers, in particular to an on-site rapid non-destructive testing method for the bonding performance of a waterproof adhesive layer. Background technique [0002] Bridge deck pavement mostly includes concrete leveling layer, waterproof bonding layer and asphalt pavement layer set up from bottom to top. Among them, the waterproof adhesive layer is used to bond the adjacent structural layers, so that the bridge deck pavement as a whole can cooperate with force and coordinate deformation, and at the same time play a role in preventing rainwater from infiltrating. The quality of its bonding performance directly affects the bridge deck pavement. service life of the device. [0003] In laboratory research, the asphalt mixture + waterproof adhesive layer + cement concrete composite specimen is usually formed first, and then the tensile test is used to chara...

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Problems solved by technology

[0004] At this stage, the following two methods are usually used: one is to continue paving the asphalt pavement layer after the waterproof bonding material is sprayed, and then conduct core sampling for the bridge deck pavement, drill composite specimens, and use conventional The bond strength is tested by a puller. This detection method will cause serious damage to the integrity of the bridge deck pavement, leaving hidden dangers of early disease on the bridge deck pavement. In addition, when the bond strength cannot meet the design requirements, it is necessary to Renovation of the asphalt pavement and waterproof bonding layer will cause project delay and huge economic waste. However, due to the huge difference between the material and surface structure of the drawing head and the asphalt concrete material, it tests the bond strength of the drawing head + waterproof adhesive layer + cement concrete, so that the test results are different from those of asphalt mixture + waterproof adhesive layer + cement The actual test results of concrete have large deviations, which cannot be used as the basis for the performance testing of waterproof bonding layer materials

[0005] It can be seen that none of the existing detection methods can quickly and accurately detect the performance of the bridge deck pavement waterproof adhesive layer, and will cause damage to the existing bridge deck pavement, resulting in early hidden dangers

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