Measuring Smoothness of Virginia’s Asphalt Overlays

2000 ◽  
Vol 1712 (1) ◽  
pp. 86-92
Author(s):  
Kevin K. McGhee
Keyword(s):  
South Dakota ◽  
Asphalt Pavement ◽  
Critical Assessment ◽  
Department Of Transportation ◽  
International Roughness Index ◽  
Roughness Index ◽  
Virginia Department ◽  
Asphalt Overlays ◽  
Special Provision

In the summer of 1996 the Virginia Department of Transportation (VDOT) initiated the pilot of a new special provision regarding the smoothness of asphalt pavement surfaces. This special provision is based on the international roughness index (IRI) and is administered with a laser-equipped South Dakota–style inertial road profiler. A critical assessment of the nontraditional equipment and methods used to administer the special provision is provided. Issues addressed in the critique include provision exemptions, the ability to identify and contend with construction variability, and peculiarities of the equipment that affect the ability of VDOT to administer a modern acceptance provision.

Control Research on Asphalt Pavement Roughness in Anchorage Zone

2014 ◽  
Vol 1030-1032 ◽  
pp. 754-757
Author(s):  
Zheng Wang ◽  
Wei Zhang ◽  
Jia Jia Cheng ◽  
Meng Chen ◽  
Wen Jing Liu
Keyword(s):  
Asphalt Pavement ◽  
International Roughness Index ◽  
Retaining Structure ◽  
Pavement Roughness ◽  
Roughness Index ◽  
Data Collection Instrument ◽  
Control Research ◽  
Main Factors ◽  
The Stability ◽  
Stability Of Structure

The effect of pavement roughness on the roadbed and retaining structure underground was studied. Three different groups of International Roughness Index (IRI) were analyzed based on 6221 data collection instrument in this paper. Results show that different pavement roughness has different effect on retaining structure. Additionally, the vibration RMS increases with IRI when it is in the range of normal driving for the car, but amplitude of the IRI is larger. Finally, the main factors which influence the stability of structure and some corresponding improving measures are presented.

Research on Relationship between Riding Quality and Pavement Distress of Asphalt Pavement

2012 ◽  
Vol 178-181 ◽  
pp. 1306-1313 ◽  
Author(s):  
Bo Peng ◽  
Lu Hu ◽  
Yang Sheng Jiang ◽  
Liang Yun
Keyword(s):  
Performance Evaluation ◽  
Nonlinear Regression ◽  
Asphalt Pavement ◽  
Theoretical Research ◽  
Pavement Performance ◽  
International Roughness Index ◽  
Pavement Distress ◽  
Pavement Roughness ◽  
Roughness Index ◽  
Linear And Nonlinear

For asphalt pavement performance evaluation, pavement roughness, which is subject to cracks, potholes, road repairs and so on, is a major factor to influence riding quality. Therefore, riding quality is partly correlated with pavement distress, and the relationship can be transformed to that between pavement roughness and distress rate. However, this relationship is not clear, and not reflected in existing evaluation models. Thus, correlation analysis and non-parametric test of independent samples were applied in this paper to find that, international roughness index and pavement distress rate are significantly different due to different grades of roads, then, linear and nonlinear regression were used to analyze the relationships between international roughness index and pavement distress rate for different road grades. Furthermore, original data were processed by logarithmic transformation, radical transformation, exponential transformation and so on, based on which, corresponding relationships were analyzed by linear and nonlinear regression. Finally, best models to describe relationships between international roughness index and pavement distress rate for different road grades were solved out, and corresponding 90% confidence intervals were computed. Research in this paper offers a reference for improving asphalt pavement performance evaluation system and models, which is conducive to further theoretical research and practice.

scholarly journals Flexible Pavement Recycling Techniques: A Summary of Activities

2021 ◽  
Author(s):  
Marshall Thompson ◽  
◽  
Ramez Hajj ◽  
Keyword(s):  
Department Of Transportation ◽  
Asphalt Emulsion ◽  
Pavement Condition ◽  
Testing Procedures ◽  
Full Depth Reclamation ◽  
Foamed Asphalt ◽  
And Performance ◽  
Virginia Department ◽  
Falling Weight ◽  
Special Provision

Cold in-place recycling (CIR) involves the recycling of the asphalt portions (including hot-mix asphalt and chip, slurry, and cape seals, as well as others) of a flexible or composite pavement with asphalt emulsion or foamed asphalt as the binding agent. Full-depth reclamation (FDR) includes the recycling of the entire depth of the pavement and, in some cases, a portion of the subgrade with asphalt, cement, or lime products as binding agents. Both processes are extensively utilized in Illinois. This project reviewed CIR and FDR projects identified by the Illinois Department of Transportation (IDOT) from the Transportation Bulletin and provided comments on pavement designs and special provisions. The researchers evaluated the performance of existing CIR/FDR projects through pavement condition surveys and analysis of falling weight deflectometer data collected by IDOT. They also reviewed CIR/FDR literature and updated/modified (as appropriate) previously provided inputs concerning mix design, testing procedures, thickness design, construction, and performance as well as cold central plant recycling (CCPR) literature related to design and construction. The team monitored the performance of test sections at the National Center for Asphalt Technology and Virginia Department of Transportation. The researchers assisted IDOT in the development of a CCPR special provision as well as responded to IDOT inquiries and questions concerning issues related to CIR, FDR, and CCPR. They attended meetings of IDOT’s FDR with the Cement Working Group and provided input in the development of a special provision for FDR with cement. The project’s activities confirmed that CIR, FDR, and CCPR techniques are successfully utilized in Illinois. Recommendations for improving the above-discussed techniques are provided.

Cross-Correlation Analysis of Line Laser High-speed Inertial Profilers

2020 ◽  
Vol 2674 (5) ◽  
pp. 626-636
Author(s):  
Noah Borelli ◽  
Bouzid Choubane ◽  
James Greene ◽  
Charles Holzschuher ◽  
James Fletcher
Keyword(s):  
Correlation Analysis ◽  
High Speed ◽  
Cross Correlation ◽  
Department Of Transportation ◽  
International Roughness Index ◽  
Accuracy Comparison ◽  
Florida Department ◽  
Cross Correlation Analysis ◽  
Roughness Index ◽  
Program Data

Thirteen different line-laser high-speed inertial profilers from four different manufacturers were recently tested at the Florida Department of Transportation (FDOT) Inertial Profiler Test Track. The hot-mix asphalt (HMA) track incorporates both dense and open-graded sections with international roughness index (IRI) values ranging from 34 to 104 in./mi. A cross-correlation analysis was performed on the resulting ride data. The accuracy comparison was performed using a SurPro reference profiler. The profilers as a group met the AASHTO R 56 cross-correlation criteria on each section except on a smooth, open-graded section. The profilers as a group met the repeatability cross-correlation on this section, but did not meet the accuracy cross-correlation requirement. This paper presents a description of the testing program, data collection efforts and subsequent analyses and findings.

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