Effect of Initial Pavement Smoothness on Future Smoothness and Pavement Life

1997 ◽  
Vol 1570 (1) ◽  
pp. 60-69 ◽  
Author(s):  
K. L. Smith ◽  
K. D. Smith ◽  
T. E. Hoerner ◽  
M. I. Darter
Keyword(s):  
Portland Cement ◽  
Asphalt Concrete ◽  
Asphalt Pavements ◽  
Portland Cement Concrete ◽  
Cement Concrete ◽  
Analysis Techniques ◽  
Roughness Model ◽  
Percent Increase ◽  
New Construction ◽  
Target Profile

Initial pavement smoothness has an effect on the future smoothness and life of asphalt concrete (AC) and portland cement concrete (PCC), as well as AC overlays of existing AC and PCC pavements. Initial pavement smoothness has a significant effect in 80 percent of new construction (both AC and PCC pavements) and in 70 percent of AC-overlay construction. Furthermore, using two different analysis techniques, added pavement life can be obtained by achieving higher levels of initial smoothness. Combined results of roughness-model and pavement-failure analyses indicate at least a 9 percent increase in life corresponding to a 25 percent increase in smoothness from target profile index (PI) values of 7 and 5 in./mi (0.11 and 0.08 m/km) for concrete and asphalt pavements, respectively.

Implementation Feasibility of Asphalt Concrete–Overlaid Portland Cement Concrete Pavement Rehabilitation Guidelines

1997 ◽  
Vol 1568 (1) ◽  
pp. 155-164
Author(s):  
Kathleen T. Hall ◽  
Amy Schutzbach
Keyword(s):  
Portland Cement ◽  
Asphalt Concrete ◽  
Concrete Pavements ◽  
Remaining Life ◽  
Portland Cement Concrete ◽  
Cement Concrete ◽  
Pavement Rehabilitation ◽  
Cement Concrete Pavement ◽  
Rehabilitation Strategy ◽  
Selection Of

Illinois Highway Research Study IHR-532 was conducted to develop project-level guidelines for evaluation, rehabilitation selection, and rehabilitation design for existing asphalt concrete–overlaid portland cement concrete (AC/PCC) pavements in Illinois. Use of these guidelines depends on data that are not normally available for network-level analysis. A study was conducted to assess the feasibility of implementing these guidelines in network-level decision making and to assess the effects that implementing these guidelines for selection of rehabilitation methods for existing asphalt-overlaid concrete pavements would have on the overall rehabilitation budget requirements for a district network of Interstate pavements, the overall network condition, and pavement network remaining life. These objectives were met by comparing the IHR-532 rehabilitation strategy (which identifies one or more rehabilitation options) with the Illinois Department of Transportation’s current rehabilitation policy, which is an AC overlay thickness of 83 mm (3.25 in.). This feasibility analysis indicated that the selection of the preferred rehabilitation strategy was strongly related to the type and condition of the existing pavement. It also indicated that the IHR-532 rehabilitation strategy and the single rehabilitation strategy yielded similar networkwide results when compared on the basis of average condition at the end of the analysis period. However, the IHR-532 rehabilitation strategy indicated greater benefit than the single rehabilitation strategy, at any budget level, when compared on the basis of network average remaining life at the end of the analysis period.

Sign in / Sign up

Export Citation Format

Share Document