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Using RAP as Coarse Aggregate in Bituminous Seal Coat

Using RAP as Coarse Aggregate in Bituminous Seal Coat

by QES | Sep 21, 2019 | Research, Sustainability and Environmental Impacts

An investigation into the viability of using recycled asphalt pavement (RAP) as a more sustainable option for road maintenance treatments. This research paved the way for the development of new standards to allow RAP to be used for road maintenance in Pennsylvania....
National Pavement Performance measures and Associated Data Quality

National Pavement Performance measures and Associated Data Quality

by QES | Sep 21, 2018 | Research

This article, written by Doug Frith, Vice President of QES, outlines our recommended approach to dealing with variations in data when designing a pavement management plan. Author(s): Doug Frith, PEDate: 2018Published in: ASHE Scanner Abstract: Performance measures on...
Lifecycle Cost Analysis Maintaining Concrete Bridge Decks in Pennsylvania

Lifecycle Cost Analysis Maintaining Concrete Bridge Decks in Pennsylvania

by QES | Mar 21, 2017 | Pavement Distress and Life-Cycle, Research

This study examines tens of thousands of bridge decks in order to identify their standard deterioration rate. This in turn helps create standardized bridge lifetime expectations and allows researchers to identify more effective maintenance treatments for bridge decks....
Economic Considerations For Asphalt Pavement Recycling Techniques

Economic Considerations For Asphalt Pavement Recycling Techniques

by QES | Jan 12, 2016 | Research, Sustainability and Environmental Impacts

Author(s): Dennis Morian, P.E. Luis Ramirez, M.Sc. Venue: Transportation Research Board 95th Annual Meeting Date: 2016 Keywords: Recycling, RAP, Pavement Rehabilitation, Asphalt Client: Transportation Research Board Abstract: While it is desirable for a transportation...
Combined Effect Of Tire Contact Pressure And Longitudinal Grade On The Interface Shear Stress Of HMA Overlay Over Ballast Concrete

Combined Effect Of Tire Contact Pressure And Longitudinal Grade On The Interface Shear Stress Of HMA Overlay Over Ballast Concrete

by QES | Sep 25, 2014 | Pavement Distress and Life-Cycle, Research

Slippage is a common pavement distress resulting from pavement layers separating due to the pressures vehicles put on pavement. No national standard addresses this issue, so this study examines its causes and effects more closely and presents solutions for it....
Prediction Of Surface Texture Of Joints And Cracks Based On Concrete Mixture Properties

Prediction Of Surface Texture Of Joints And Cracks Based On Concrete Mixture Properties

by nacb-adm | Sep 21, 2014 | Pavement Distress and Life-Cycle, Research

Load Transfer Efficiency (LTE), or how effectively concrete pavement performs near the edges of each slab, is one of the most important factors in how long that pavement will last. This study presents an empirical model to explain how to optimize the concrete mixture...
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