Superpave Field Implementation: Florida’s Early Experience

1998 ◽  
Vol 1609 (1) ◽  
pp. 51-60 ◽  
Author(s):  
James A. Musselman ◽  
Bouzid Choubane ◽  
Gale C. Page ◽  
Patrick B. Upshaw
Keyword(s):  
Asphalt Pavement ◽  
Early Experience ◽  
Field Application ◽  
Pavement Performance ◽  
Department Of Transportation ◽  
Concerted Effort ◽  
The Past ◽  
Early Experiences ◽  
Florida Department ◽  
Current Loading

Over the past 10 to 15 years, Interstate pavements in northern Florida have experienced a significant number of failures, primarily due to rutting. It was believed that the present fine-graded, 50-blow Marshall-designed mixes were inadequate to withstand current loading conditions. The newly developed Superpave system represented an opportunity to address several of Florida’s asphalt pavement problems. Thus, the Florida Department of Transportation made a concerted effort to implement Superpave technology in 1996. During this period, eight projects were changed from the traditional Marshall mix designs to Superpave. Although the new procedure offers potential for improved pavement performance, there has been very little experience nationally with its field application. Florida’s early experiences with the field implementation of Superpave are documented.

scholarly journals Evaluation of the Impact of Asphalt Mix Segregation on Pavement Performance

2019 ◽  
Vol 2673 (1) ◽  
pp. 310-316 ◽  
Author(s):  
Ohhoon Kwon ◽  
Bouzid Choubane ◽  
David Hernando ◽  
Wayne Allick
Keyword(s):  
Laboratory Tests ◽  
Pavement Performance ◽  
Department Of Transportation ◽  
Accelerated Pavement Testing ◽  
Aggregate Gradation ◽  
Florida Department ◽  
Asphalt Mix ◽  
Pavement Testing ◽  
Scale Experiment ◽  
The Impact

A full-scale experiment was conducted at the Florida Department of Transportation (FDOT)’s accelerated pavement testing (APT) facility to evaluate the impact of segregation on hot mix asphalt (HMA) pavement performance. Localized areas of segregation were artificially generated during the construction of the APT test tracks, using improper paving techniques without any manipulation of the aggregate gradation. The subsequent APT results showed that, under similarly controlled conditions, the segregated locations exhibited significantly higher rutting than the non-segregated areas. Furthermore, supplementary field and laboratory tests indicated that the segregated locations had, in comparison, greater cracking, raveling, and tire-pavement interaction noise potentials.

Florida Department of Transportation’s Enhanced Hydroplaning Prediction Tool

2021 ◽  
pp. 036119812110114
Author(s):  
Hyung Suk Lee ◽  
Mateo Carvajal ◽  
Charles Holzschuher ◽  
Bouzid Choubane
Keyword(s):  
Water Film ◽  
Design Parameters ◽  
Prediction Tool ◽  
Design Phase ◽  
Department Of Transportation ◽  
Forensic Investigation ◽  
The Past ◽  
Florida Department ◽  
Roadway Design ◽  
Traveling Speed

Florida Department of Transportation (FDOT) recently developed and implemented a new hydroplaning prediction (HP) program for predicting the traveling speed at which a vehicle would start hydroplaning. The tool was developed as part of the effort to reduce hydroplaning accidents and is being used during the roadway design phase to evaluate the hydroplaning potential of Florida’s roadways. This paper presents an overview of FDOT’s HP program and demonstrates how it may be used. The tool incorporates a total of four water film thickness models and three hydroplaning speed models developed in the past, allowing for a total of 12 model combinations for the hydroplaning analysis. The tool also offers different analysis options that may be used to meet a variety of FDOT’s needs. As demonstrated in this paper, the primary use of the new HP tool is for checking the final geometric roadway design parameters for hydroplaning potential. In addition, the HP program can also be used as a forensic investigation tool for identifying specific locations that exhibit higher potential for hydroplaning.

Research Progress on Aging of Polymer Modified Asphalt

2011 ◽  
Vol 71-78 ◽  
pp. 5038-5041
Author(s):  
Chang Qing Fang ◽  
Min Zhang ◽  
Jing Bo Hu ◽  
Ying Zhang ◽  
Rui En Yu
Keyword(s):  
Asphalt Pavement ◽  
Present Situation ◽  
Research Progress ◽  
Pavement Performance ◽  
Modified Asphalt ◽  
Aging Mechanism ◽  
Characterization Techniques ◽  
Aging Properties ◽  
Polymer Modified Asphalt ◽  
At Home

Asphalt aging is inevitable to the asphalt pavement performance, which will lead asphalt to hardening gradually and becoming brittle. Therefore, aging progress shortens the life of asphalt, but the study on polymer asphalt improves the phenomenon. The present situation on aging of polymer modified asphalt is summarized and the aging mechanism of modified asphalts is analyzed in the paper. Otherwise, the research progress at home and abroad on the aging properties of modified asphalt is introduced by a series of characterization techniques, which include mechanics technique, rheology technique, FTIR, GPC and so on

STEP in Australia

1980 ◽  
Vol 5 (1-2) ◽  
pp. 32-34
Keyword(s):  
Public Schools ◽  
Parent Education ◽  
Effective Parenting ◽  
The Past ◽  
Early Experiences ◽  
Systematic Training ◽  
Social Agencies

SummaryIn the past couple of years, Dinkmeyer and McKay's (1976) Systematic Training for Effective Parenting (STEP) has become very popular in Australia. It is currently being used in public schools, Department of Children Services and other social agencies. As the use of STEP increases, it seems appropriate for STEP users to share their ideas in order to promote a better understanding of the programme. In this paper, the author(i) describes his early experiences with parent education;(ii) identifies the theoretical origins of step, and(iii) describes some guidelines for a STEP leader.

Investigation and modelling of asphalt pavement performance in cold regions

2017 ◽  
Vol 20 (8) ◽  
pp. 986-997 ◽  
Author(s):  
Waleed Zeiada ◽  
Khaled Hamad ◽  
Maher Omar ◽  
B. Shane Underwood ◽  
Mohamad Ali Khalil ◽  
...  
Keyword(s):  
Asphalt Pavement ◽  
Pavement Performance ◽  
Cold Regions
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