A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Development of a Profile-Based Smoothness Specification for Asphalt Concrete Overlays (Revised)
The Texas Department of Transportation (TxDOT) is implementing smoothness specifications based on profilograph testing as part of its construction quality control/quality assurance (QC/QA) program. To improve upon the existing test method, TxDOT sponsored a research project with the Texas Transportation Institute (TTI) to develop a smoothness specification for asphalt concrete overlays based on the current generation of profiling equipment which offer better accuracy and repeatability than the profilograph. To develop this specification, researchers evaluated the relationship between pavement profile and predicted overlay life assuming reflection cracking as the primary failure mechanism. This relationship is evaluated in two steps. First, the effect of surface profile on predicted dynamic loads is determined by vehicle simulation. Then, the effect of dynamic load variability on predicted pavement life is analyzed, This work led to the development of a relationship between the predicted change in pavement life associated with the placement of the overlay, dynamic load variability, and the fracture parameter, n, of the asphalt overlay mixture.
Development of a Profile-Based Smoothness Specification for Asphalt Concrete Overlays (Revised)
The Texas Department of Transportation (TxDOT) is implementing smoothness specifications based on profilograph testing as part of its construction quality control/quality assurance (QC/QA) program. To improve upon the existing test method, TxDOT sponsored a research project with the Texas Transportation Institute (TTI) to develop a smoothness specification for asphalt concrete overlays based on the current generation of profiling equipment which offer better accuracy and repeatability than the profilograph. To develop this specification, researchers evaluated the relationship between pavement profile and predicted overlay life assuming reflection cracking as the primary failure mechanism. This relationship is evaluated in two steps. First, the effect of surface profile on predicted dynamic loads is determined by vehicle simulation. Then, the effect of dynamic load variability on predicted pavement life is analyzed, This work led to the development of a relationship between the predicted change in pavement life associated with the placement of the overlay, dynamic load variability, and the fracture parameter, n, of the asphalt overlay mixture.
Development of a Profile-Based Smoothness Specification for Asphalt Concrete Overlays (Revised)
E. G. Fernando (author)
1998
164 pages
Report
No indication
English
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