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.

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.

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.

scholarly journals Performance of Noise Reduction and Skid Resistance of Durable Granular Ultra-Thin Layer Asphalt Pavement

Materials ◽  
2020 ◽  
Vol 13 (19) ◽  
pp. 4260
Author(s):  
Wei Li ◽  
Sen Han ◽  
Qibo Huang
Keyword(s):  
Thin Layer ◽  
Asphalt Binder ◽  
Resistance Index ◽  
Test System ◽  
Maximum Aggregate Size ◽  
Skid Resistance ◽  
Fine Aggregate ◽  
Asphalt Rubber ◽  
Pavement Thickness

In this paper, the ultra-thin layer (UTL) is defined as the dense framework structure mixture made of asphalt binder, fine aggregate with nominal maximum aggregate size (NMAS) not greater than 13.2 mm and possible additives (mineral or organic), thickness of 2–4 cm. The study aims to investigate comprehensive performance of UTL asphalt mixture. The method of impact freeze thaw split test and the index of impact freeze–thawing damage degree (IFTDD) are proposed to reflect the durability. The indoor tire-rolling-down test system and accelerated abrasion machine are used to simulate the tire-pavement interaction and test road noise and skid resistance, respectively. Though evaluating the influencing factors (pavement thickness, gradation, asphalt binder type, and the content of KS additive) on durability, the optimum parameters with excellent durability are recommended. Combined with the test of noise and skid resistance, the factors affecting the surface function are analyzed. Moreover, the prediction mathematical model of skid resistance and the long-term safety benefit value Eeff are put forward. Results indicate that pavement thickness is the most significant factor effecting on durability, and gradation is the most significant factor affecting noise. Compared with KS additive, gradation has a greater influence on skid resistance index of Texture Depth (TD), whereas, KS additive is the most significant factor affecting British Pendulum Number (BPN). Furthermore, with the addition of asphalt rubber (AR), IFTDD and noise are reduced by 29.17% and 1.6 dB, and BPN and TD increase by 0.7 and 0.03 mm, remarkably. Compared with different asphalt types, the noise of UTL asphalt rubber mixture with 13.2 mm NMAS (UTL13 AR) is the lowest. Additionally, when KS content increases by 0.6%, the noise increases by 3 dB. Furthermore, on the basis of the calculation results of Eeff, UTL13 AR mixture with 0.5% KS has the best long-term benefit of pavement safety and is recommended for field project.

scholarly journals Evaluation of Long-Term Performance for Bonded Natural Stone Pavement Using Accelerated Pavement Test [Part Ⅱ: Skid Resistance, Response of Deflection and FEM Analysis]

2020 ◽  
Vol 10 (3) ◽  
pp. 879
Author(s):  
Junho Gong ◽  
Eui-Seok Han ◽  
Sun-Kyu Park ◽  
Dooyong Cho
Keyword(s):  
Fem Analysis ◽  
Test Method ◽  
Natural Stone ◽  
Small Element ◽  
Skid Resistance ◽  
Resistance Response ◽  
Pavement Testing ◽  
Long Term Performance ◽  
Term Performance

Natural stone-paved roads have been generally used to preserve historical regions due to its architectural aesthetic aspect and environmental impact. However, there are limitations of travelling speed and traffic volume owing to the defects caused by the increased traffic loading and volume. To deal with these hindrances, ultra-rapid-hardening cement for both jointing and laying course materials in rigid small element pavement was considered. The objective of the present study was to continuously evaluate and compare the long-term performance of the suggested bound stone pavement throughout the various test criteria such as skid resistance and Falling Weight Deflectometer tests. The skid resistance outcome was met to the requirement and the response of deflection was measured following by related test method. To compare rut depth, the Finite Element Method (FEM) analysis was performed by modelling with material properties and by creating the loading cycle for imitating the Accelerated Pavement Testing (APT). The maximum deflections of asphalt, concrete block, stone A and stone B were calculated to 17.7, 6.1, 6.3, and 3.6 mm, respectively. Compared to the final outcomes of APT and FEM analysis, there was a difference ranging from 2.1 to 2.3 mm in bound stone pavement B and A, respectively.

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