Device and method for testing interlaminar joint strength of pavement layers

Abstract

The invention discloses a device and a method for testing interlaminar joint strength of pavement layers. The test device comprises a pavement layer sample, a vertical pressure exerting device and a torsional shear apparatus, wherein the vertical pressure exerting device is arranged above the pavement layer sample and the torsional shear apparatus; vertical pressure is exerted to the pavement layer sample through the vertical pressure exerting device; the pavement layer sample is formed by an upper pavement sample, a waterproof bonding layer sample and a lower pavement sample; the upper pavement sample comprises a circular core sample and an inner cylinder sample; the torsional shear apparatus clamps the upper pavement sample inside a horizontal plane, exerts torque to the upper pavement sample, and is connected with a torque wrench tester on the torsional shear apparatus. By adopting the device and the method, torsional shear damage under the action of variable positive pressure can be achieved, meanwhile, the influence on the size and the test result of a mixture are eliminated by processing the test samples for a plurality of times, the theory and the actual damage are accorded, and the device and the method are simple and convenient to operate.

Description

technical field [0001] The invention belongs to the technical field of pavement engineering equipment, and in particular relates to a test device for interlayer connection strength of pavement layers and a test method using the test device. Background technique [0002] Asphalt concrete pavement, especially bridge deck pavement, is an important factor affecting the overall performance of structural layers. The results of mechanical analysis show that after the state of the interlayer changes from continuous to smooth, the shear stress within or between layers of the pavement increases geometrically. premise, but the connection state of the pavement after actual construction does not conform to the theoretical assumptions, and there is also a lack of reasonable and effective means for evaluation. The lack of testing equipment and testing methods leads to the lack of effective quality control of the state between pavement layers, resulting in Early damage problems such as pus...

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Problems solved by technology

[0004] In 2005, the National Highway Cooperative Research Program (NCHRP) initiated a study (NCHRPProject9-40) to determine the bonding layer material. RILEM) also initiated a similar plan. At present, there is no recognized test method and evaluation standard for the interlayer connection performance of pavement in my country, and no unified testing equipment has been formed. At present, some universities and research departments have disclosed relevant test bonding However, such test equipment has a heavy and complex structure, poor reproducibility of the test results, lack of operability on site, a gap between the actual failure form and the theoretical simulation, and it is difficult to test the bridge deck bonding layer indoors and outdoors Unification of means and other defects

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