scholarly journals Study on the Asphalt Pavement Response in the Accelerated Pavement Testing Facility

2020 ◽  
pp. 871-880
Author(s):  
Ruxin Jing ◽  
Aikaterini Varveri ◽  
Xueyan Liu ◽  
Athanasios Scarpas ◽  
Sandra Erkens
Keyword(s):  
Asphalt Pavement ◽  
Accelerated Pavement Testing ◽  
Testing Facility ◽  
Pavement Response ◽  
Pavement Testing

scholarly journals Asphalt Pavement Mechanical Response of Accelerated Pavement Testing in Single-Axle and Dual-Axle Loading Modes

2019 ◽  
Vol 2019 ◽  
pp. 1-11
Author(s):  
Zhiguang Guan ◽  
Chuanyi Zhuang ◽  
Peng Zhang
Keyword(s):  
Mechanical Response ◽  
Asphalt Pavement ◽  
Compressive Strain ◽  
Accelerated Pavement Testing ◽  
Loading Mode ◽  
Pavement Testing ◽  
Pass Through ◽  
Loading Modes ◽  
Pavement Damage ◽  
Strain Peak

The objective of this study is to evaluate the influence of moving loads on the asphalt pavement in response to single-axle and dual-axle loading modes using the full-scale accelerated pavement testing (APT) facility from Shandong Jiaotong University. First, a test lane of pavement with four structures is constructed. Eleven strain sensors and four pressure cells are embedded at different depths and positions. Secondly, a research on the strain and stress in single-axle and dual-axle loading modes is conducted. Finally, the time accumulation of strain and stress is defined to describe the degree of pavement damage. The study reaches the following conclusions: (1) the strain reversal is induced as the wheels pass through the pavement, and the stress is always a positive value. (2) Both the strain and the stress increase as the loading increases regardless of the loading modes. (3) Comparing the two loading modes at the same velocity and loading, the horizontal tensile strain peak, the horizontal compressive strain peak, and the stress peak are all greater in the single-axle loading mode. But the degree of pavement damage is greater in the dual-axle loading mode based on the points of the time accumulations of strain and stress of each pass.

scholarly journals Long-Term Skid Resistance Evaluation of GAC-16 Based on Accelerated Pavement Testing

2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
Xinquan Xu ◽  
Yunhong Yu ◽  
Jun Yang ◽  
Chuanhai Wu
Keyword(s):  
Prediction Models ◽  
Asphalt Pavement ◽  
Reduction Rate ◽  
Skid Resistance ◽  
Fine Aggregate ◽  
Accelerated Pavement Testing ◽  
Evaluation Indexes ◽  
Attenuation Law ◽  
Pavement Testing

In this paper, four antiskidding surface test sections were paved to investigate the long-term skid resistance of the improved dense-graded asphalt concrete in Guangdong Province (GAC) using diabase fine aggregate instead of limestone. Four test sections were tested by the accelerated loading equipment (MLS11, mobile load simulator). The reduction law of the long-term skid resistance of GAC-16 was analyzed based on the accelerated pavement testing results. Prediction models of the GAC-16 skid resistance were also established and verified. The evaluation indexes of the long-term skid resistance of the asphalt pavement were introduced, and the antiskidding durability of different sections was evaluated. Results show that the initial British pendulum number (BPN) and mean texture depth (MTD) of the asphalt pavement cannot completely characterize its long-term skid resistance. With increasing loading cycles, the attenuation law of the BPN and MTD of GAC-16 denotes a fast reduction during the early stage, which gradually stabilizes. The relation between the skid resistance index and accelerated loading cycles was analyzed by nonlinear fitting according to the least-squares-method principle. The attenuation law of the BPN and MTD of GAC-16 with loading cycles was in accordance with the exponential and logarithmic models, respectively. The long-term antiskidding performance of the asphalt pavement could be accurately characterized using a stable BPN, loading cycles while reaching a stable BPN, the initial MTD value, and the MTD reduction rate as the evaluation indexes of the skid resistance of asphalt pavement. Compared with limestone fine aggregate, diabase fine aggregate can improve the long-term skid resistance of the asphalt mixtures.

Analysis on Three-Direction Strain of Asphalt Pavement Structure Based on Accelerated Pavement Testing

2011 ◽  
Vol 255-260 ◽  
pp. 3426-3431 ◽  
Author(s):  
Jin Ting Wu ◽  
Fen Ye ◽  
Yin Ting Wu
Keyword(s):  
Mechanical Response ◽  
Asphalt Pavement ◽  
Research Result ◽  
Rigid Base ◽  
Accelerated Pavement Testing ◽  
Moving Vehicle ◽  
Vehicle Loads ◽  
Pavement Structure ◽  
Pavement Testing ◽  
Strain Responses

The internal mechanical response of asphalt pavement structure is difficult to be obtained because of the limitations of theoretical calculation and present testing methods. In order to get practical information of instructure layers, this paper analyzed the cumulative and instantaneous strains of layers’ bottom of semi-rigid base asphalt pavement based on Accelerated Pavement Testing and Fiber Bragg Grating sensors, as well as got the spatial distribution and time-variation law of longitudinal, lateral and vertical strain responses under controlled loading condition. The research result shows that under the moving vehicle loads, there is an obvious alternative property of tension-compression as the strain response of the pavement structure, and different variation shapes of instantaneous stain are in different layers from top to down. Also the measured instantaneous three-direction strain of the bottom of each surface are higher than the calculated values with BISAR, while they anatomizes well in base. This paper can be regarded as useful and tentative research and application on future correlative study.

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