01476123

Component

There is limited data on full-depth porous asphalt (PA) pavement performance in wet-freeze regions in the USA. To further study cold-weather PA performance, research was performed at the Minnesota Road Research (MnROAD) Low Volume Road (LVR). The objective of this research was to study the durability, maintenance requirements, hydrologic benefits, and environmental considerations of a full-depth porous asphalt (PA) pavement, installed on a low-volume roadway in a cold climate. To meet the objective, two porous asphalt test cells were constructed on the LVR test loop. One porous asphalt cell was constructed over a sand subgrade (MnROAD cell 86) and one over a clay subgrade (cell 88). In addition, a sealed/impervious, dense graded hot mix asphalt (DGHMA) control section (cell 87) was constructed directly adjacent to the porous sections, for comparison of water runoff, pavement performance and durability. This paper summarizes the mixture design, thickness determination, construction, and performance aspects of the porous asphalt test cells. The data presented herein describes the PA cells after the first three years of service (December 2008 to December 2011) and approximately 40,000 applied asphalt equivalent single axle loads (ESALs). The PA test cells performed well, in spite of what is considered to be significant loading for this type of pavement. The significant pavement distresses observed were rutting in the loaded lane and shallow surface raveling. Findings resulting from this study and ongoing monitoring of the test cells will contribute to the design and maintenance of full-depth porous asphalt pavements in Minnesota and other cold climates. Data collection for the initial project ended in December 2011, the final report was published in April. 2012.

This paper was sponsored by TRB committee AFD40 Full-Scale Accelerated Pavement Testing.

01470560

13-4381

English

16p

2013

Transportation Research Board 92nd Annual Meeting

Digital/other

Figures; Photos; References

Asphalt pavements; Durability; Environmental impacts; Frigid regions; Low volume roads; Mix design; Pavement maintenance; Pavement performance; Performance tests; Porous materials; Porous pavements; Protection against environmental damage

Minnesota Road Research Project (MnROAD)

Minnesota

Environment; Highways; Materials; Pavements; I15: Environment; I31: Bituminous Binders and Materials

Transportation Research Board Annual Meeting 2013 Paper #13-4381

PRP, TRIS, TRB, ATRI

Feb 5 2013 12:51PM