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| Test and Evaluation Method of Interlaminar Shear Performance of Composite Pavement |
| CAO Ming-ming1,2, HUANG Wan-qing2, LU Yang1, TAN Qian-qian1 |
1. School of Civil Engineering, Southwest Jiaotong University, Chengdu Sichuan 610031, China;
2. Sichuan communications Survey and Designing Institution, Chengdu Sichuan 61004 l, China |
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Abstract The interlayer mechanical properties of composite asphalt pavement structure based on the base surface morphology of a concrete surface, adhesive layer material, working environment, and other factors are complex. As discussed, the field of mass production samples, combined with laboratory shear tests, confirms the rationality of shear test in the composite interlayer shear strength evaluation, presents the composite shear strength test method of the interlayer and corrected maximum interlaminar shear strength calculation formula, further introduces the evaluation method of anti-shear strength of composite pavement, and verifies the feasibility of the method based on the results that should be used for the project compared with the surface by sandblasting and chiseling treatment, adhesive layer material, working temperature, molding method, loading method, degree of pollution, and other factors on the interface shear strength of the adhesive layer. Results indicate that the surface roughness, temperature, test factors of molding methods, loading rate, and interlayer contamination strongly influence the bonding performance between layers and in the construction of the best texture depth value and maximum shear strength between layers. The best interface texture depth is decided by the factor waterproof bonding layer type, interface roughness method, and base geometry node of the base surface. The shear performance of SBS asphalt Synchronous Crushed Stone Seal Coat interlayer sensitivity to temperature is greater than that of polymer reaction-type waterproof adhesive material. The maximum shear strength calculation formula was introduced in the special road section and temperature correction coefficient. The interlayer temperature is 40℃ when the shear strength between layers is the main control index. The calculation results and evaluation index of consistency, shear-stress test method, and system method interlaminar shear strength evaluation can be used for pavement structure design and performance evaluation.
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Received: 10 November 2017
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| Fund:Supported by the Sichuan Province Transportation Science and Technology Project (2015 since 4-1) |
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Corresponding Authors:
CAO Ming-ming
E-mail: 707360021@qq.com
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2018, Vol. 12 
