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Texture characteristics of unpolished and polished aggregate surfaces
Authors:Chengyi Huang
Affiliation:1. School of Civil Engineering, Shandong University, Jingshilu 17923, Jinan, Shandong 250061, China;2. Texas Department of Transportation, 4203 Bull Creek #39, Austin, TX 78731, United States;1. Universidade Federal do Ceará (UFC), Laboratório de Mecânica dos Pavimentos (LMP), Campus do Pici S/N, Building 703, 60440-554 Fortaleza, CE, Brazil;2. Universidade de São Paulo (USP), Laboratório de Tecnologia de Pavimentação (LTP), Av. Almeida Prado, Travessa 2, No. 83, 05508-070, Cidade Universitária, São Paulo, SP, Brazil;1. Institute of Highway Engineering, RWTH Aachen University, 52074 Aachen, Germany;2. School of Transportation, Southeast University, Nanjing 210096, China;3. Institute of Clay and Interface Mineralogy, RWTH Aachen University, 52072 Aachen, Germany;4. School of Transportation Science & Engineering, Harbin Institute of Technology, 150090 Harbin, China;1. Institute of Vehicle System Technology, Karlsruhe Institute of Technology, 761131 Karlsruhe, Germany;2. Institute for Applied Computer Science, Karlsruhe Institute of Technology, 76344 Eggenstein-Leopoldshafen, Germany
Abstract:In order to investigate evolution of polishing aggregate surfaces on an aggregate wear index (AWI) wear track specimen, experimental texture measurements and data dependent system (DDS) approach were utilized to model and analyze elevation profiles collected from unpolished and polished aggregate surfaces. It was found that the DDS approach was able to characterize the evolved macrotexture and microtexture. The polishing effect induced by the interaction between tire tread and aggregate surfaces was found to reduce the microtexture roughness significantly, but showed little influence on the macrotexture. This does not imply that the macrotexture plays little role in tire tread friction. It was also found that polishing effect presented a strong relationship with grain size existing on aggregate surfaces.
Keywords:Aggregate  Surface texture  Tire polishing  Macrotexture and microtexture  Data dependent system (DDS)
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