Temperature correction method of sensor measured texture depth index based on equivalent temperature of asphalt surface

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International Journal of Pavement Research and Technology Journal homepage: www.springer.com/42947

Temperature correction method of sensor measured texture depth index based on equivalent temperature of asphalt surface layer Jiangfeng Wua,b, Xudong Wanga*, Qian Xiaoa, Lei Zhanga, Wei Guana, Chenchen Zhangc a Research

Institute of Highway, Ministry of Transport, Beijing 100088, China of Civil Engineering, Tsinghua University, Beijing 100084, China c Intelligent Transportation Research Center, Southeast University, Nanjing 210096, Jiangsu, China b Department

Received 13 October 2019; received in revised form 31 August 2020; accepted 19 September 2020

Abstract

Texture depth is one of the most important indexes reflecting the skid resistance performance of asphalt pavement. Temperatur e has effect on the texture depth of asphalt pavement. There is no effective temperature correction method on the texture depth index in China, which leads to the phenomenon that the test texture depth could not reflect the true skid resistance performance of pavement structure. In order to effecti vely analyze the temperature influence on the skid resistance of asphalt pavement, a temperature correction method of sensor measured texture depth (SMTD) index was proposed based on the SMTD data and equivalent temperature of asphalt surface layer in RIOHTrack full-scale track. The annual equivalent temperature at 4cm location of asphalt surface layer was taken as the correction reference temperature. The Boltzmann function was adopted to establish the relationshi p between the SMTD index and the daily equivalent temperature of asphalt surface layer. The mean square error of temperature correc tion model for SMTD index is 0.977. The maximum error of temperature correction model for SMTD index is 2.601%, which meets the detection requirements on road engine ering. The temperature correction method is significant to reflect the SMTD index change of pavement skid resistance performance, improve the evaluation accuracy of pavement skid resistance, and improve the safety of driving on highway. Keywords: Pavement skid resistance performance; Sensor measured texture depth; Temperature correction method; Boltzmann function; Equivalent temperature

1. Introduction Texture depth is one of the most important indexes reflecting skid resistance performance of asphalt pavement. A large number of studies show that the texture characteristics of pavement surface have a significant impact on its skid resistance performance. The skid resistance performance of pavement is mainly determined by its microtexture structure and macrotexture structure [1-3]. The characteristic parameters could accurately predict the skid resistance performance of pavement. The microstructure mainly affects the skid resistance performance of asphalt pavement in lowspeed and dry conditions, while the macrostructure mainly affects the skid resistance performance of asphalt pavement in high-speed

* Corresponding author E-mail addresses: [email protected] (J. Wu); [email protected]

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