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Publication Number: FHWA-RD-01-168
Date: July 2006
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This report documents a detailed review of the Long Term Pavement Performance (LTPP) Special Pavements Study—5 (SPS-5) experiment. The purpose of the review was to determine the adequacy of the data provided by the experiment. The SPS-5 experiment, entitled Rehabilitation of Asphalt Concrete Pavements, is one of the key experiments of the LTPP program. Its goal is to develop improved methodologies and strategies for the rehabilitation of flexible pavements. The review concentrated on the core experimental test sections, with secondary emphasis on the supplemental test sections that were built by individual agencies for each SPS-5 project.
As a result of this work, the data availability and completeness for the SPS-5 experiment were found to be good overall with two exceptions. The two critical elements or parameters found to have significant deficiencies were the traffic and materials test data. These data deficiencies need to be addressed before a comprehensive analysis of the SPS-5 experiment is conducted. The majority of the SPS-5 data that were collected were at level E.
This report will be of interest to highway agency engineers involved in the collection, processing, and analysis of data that shed light on ways to improve on the design procedures and standards for rehabilitating hot mix asphalt-surfaced pavements.
Gary L. Henderson
Director, Office of Infrastructure
Research and Development
This document is disseminated under the sponsorship of the U.S. Department of Transportation in the interest of information exchange. The U.S. Government assumes no liability for its contents or use thereof. This report does not constitute a standard, specification, or regulation.
The U.S. Government does not endorse products or manufacturers. Trade or manufacturers’ names appear herein only because they are considered essential to the objective of this document.
QUALITY ASSURANCE STATEMENT
The Federal Highway Administration (FHWA) provides high-quality information to serve Government, industry, and the public in a manner that promotes public understanding. Standards and policies are used to ensure and maximize the quality, objectivity, utility, and integrity of its information. FHWA periodically reviews quality issues and adjusts its programs and processes to ensure continuous quality improvement.
1. Report No.
2. Government Accession No.
3. Recipient’s Catalog No.
4. Title and Subtitle
REHABILITATION OF ASPHALT CONCRETE PAVEMENTS: INITIAL EVALUATION OF THE SPS-5 EXPERIMENT—FINAL REPORT
5. Report Date
6. Performing Organization Code
Harold L. Von Quintus, Amy L. Simpson, Ahmed A. Eltahan
8. Performing Organization Report No.
9. Performing Organization Name and Address
10. Work Unit No. (TRAIS)
11. Contract or Grant No.
12. Sponsoring Agency Name and Address
Office of Engineering Research and Development
13. Type of Report and Period Covered
14. Sponsoring Agency’s Code
15. Supplementary Notes
Work was conducted as part of the LTPP Data Analysis Technical Support Contract.
The SPS-5 experiment, entitled Rehabilitation of Asphalt Concrete Pavements, is one of the key experiments of the TPP program. The objective of this experiment is to determine the relative influence and long-term effectiveness of different rehabilitation techniques (including overlay thickness, material, and surface preparation) and site conditions (traffic, pre-existing pavement condition, and climatic factors) on performance. This report documents the first comprehensive review and evaluation of data completeness and availability from the SPS-5 experiment. Eighteen SPS-5 projects have been identified. At each site there are nine core test sections. Some SPS-5 projects also have various supplemental sections. 210 test sections are included in the SPS-5 experiment.
The data availability and completeness were good overall for the SPS-5 experiment with two exceptions: traffic and materials test data. These data deficiencies need to be addressed before a comprehensive analysis of the SPS-5 experiment is conducted. Both of these data elements must be collected in order for the SPS-5 experiment to meet the expectations for calibrating and validating mechanistic models. The majority of the SPS-5 data that were collected were at level E.
Required experiment design factors were compared with the actual experiment design for the large majority of the design factors and can be characterized as good to excellent when comparing designed versus constructed. One project had yet to be constructed and materials testing and data processing still needed to be completed.
17. Key Words
Design factors, experimental design, HMAC, LTPP, performance trends, SPS-5, overlay
18. Distribution Statement
No restrictions. This document is available to the public through
19. Security Classification (of this report)
20. Security Classification (of this page)
21. No. of Pages
Form DOT F 1700.7 (8-72) Reproduction of completed page authorized
|ANOVA||analysis of variance|
|AGG||aggregate bases (identical to dense graded aggregate base materials)|
|ATB||automatic vehicle classification (or automated vehicle classifiers)|
|AVC||asphalt-treated base mixtures|
|AWS||automated weather station|
|COV||coefficient of variance|
|DGAB||dense-graded aggregate base|
|DOT||Department of Transportation|
|ESAL||equivalent single axle load|
|FHWA||Federal Highway Administration|
|FWD||falling weight deflectometer|
|GPS||General Pavement Studies|
|HMA||hot mix asphalt|
|IMS||Information Management System|
|IRI||International Roughness Index|
|LTPP||Long-Term Pavement Performance|
|NAA||National Aggregate Association|
|NCDC||National Climatic Data Center|
|NOAA||National Oceanic and Atmospheric Administration|
|OGFC||open graded friction course|
|PFC||porous friction course|
|QC/QA||quality control/quality assurance|
|RAP||Recycled Asphalt Pavement|
|RCO||Regional Coordination Office|
|RIMS||Regional Information Management System|
|SAMI||stress absorbing membrane interlayer|
|SHA||State Highway Authority|
|SHRP||Strategic Highway Research Program|
|SPS||Special Pavement Studies|
|WIM||weigh in motion|
Topics: research, infrastructure, pavements and materials
Keywords: Design factors, experimental design, HMAC, LTPP, performance trends, SPS-5, overlay
TRT Terms: research, facilities, transportation, highway facilities, roads, parts of roads, pavements, pavements--United States, concrete--maintenance and repair, asphalt--maintenance and repair