Improved dynamic shear rheometer parallel-plate and test method thereof

Abstract

The invention discloses an improved dynamic shear rheometer parallel-plate and a test method thereof. The improved dynamic shear rheometer parallel-plate comprises an upper parallel-plate and a lowerparallel-plate, the upper parallel-plate comprises a bottom platform and a first handle, the lower parallel-plate comprises a second handle, a top platform, a boss, and a sleeve;the lower surface of the top platform is fixedly connected with the second handle, and the upper surface of the top platform is fixedly connected with the boss; the edge of the periphery of the upper surface of the top platform is detachably connected with the upright sleeve; the bottom platform is correspondingly arranged on the top of the boss, and the upper surface of the bottom platform is fixedly connected with the first handle; a to-be-tested sample is placed between the boss and the bottom platform; and the first handle and the second handle are both in erection joint witha dynamic shear rheometer. Accordingto the improved dynamic shear rheometer parallel-plate, the rheological properties ofasphalt or mortar can be quantitatively tested when the surface of a real mineral material is in a contact state under the condition of water, and thusquantitative evaluation of water damage resistance of different types of asphalt or mortar based on an asphalt shear rheometer is possible.

Description

technical field [0001] The invention belongs to asphalt performance testing equipment, and relates to an improved dynamic shear rheometer parallel plate and a testing method thereof. Background technique [0002] Water damage to asphalt pavement is one of the main forms of asphalt pavement damage. According to existing research, water damage to asphalt pavement is one of the key factors causing early pavement disease. It is precisely because water damage is closely related to road performance , which has increasingly become a worldwide problem in recent years. At present, the damage forms of water damage are mainly classified into three types: cohesive damage, adhesive damage and cohesive-adhesive composite damage. Adhesion failure refers to adhesion failure at the weak interface between asphalt and aggregate, and cohesion failure refers to cracking failure in asphalt or asphalt mortar due to the decrease of cohesive force. For the problem of water damage, different schola...

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Problems solved by technology

For the problem of water damage, different scholars have carried out in-depth research based on different theoretical methods (fracture mechanics, damage mechanics, etc.) and different scales (macroscopic, microscopic and even nanoscopic), and many achievements have been made. The evaluation and characterization of adhesion and asphalt resistance to spalling are also included in the corresponding norms. However, in the existing norms, the evaluation of the water damage resistance of asphalt or asphalt mortar is mainly qualitative evaluation. The correlation between the index and the actual application of the project is not strong, and the quantitative evaluation methods are mostly complicated and require high operation

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