01713744

Monograph

http://www.trb.org/Main/Blurbs/179277.aspx

This report documents agency policy for lift thickness and minimum compaction requirements on resultant asphalt pavement quality. To achieve expected pavement performance, it is important that asphalt concrete (AC) have adequate density. A critical factor in achieving this density is the ratio of lift thickness to nominal maximum aggregate size (t/NMAS). The information in this report can help make agencies aware of a range of practices other agencies use to achieve a desired t/NMAS ratio, ensuring that density of AC is adequate to meet expected pavement performance. The information contained in this synthesis was obtained using three sources. First, a literature review was conducted on the state of practice of achieving desired lift thickness. Second, a survey was distributed to state departments of transportation as well as transportation agencies in Canadian provinces to determine their current mix type selection and pavement lift thickness standards and how they relate to structural design and construction specifications. Finally, follow-up interviews were conducted with agencies in selected states.

Project 20-05, Topic 49-05

English

131p

2019

NCHRP Synthesis of Highway Practice

9780309480420

Digital/other

Appendices; Figures; References

Asphalt concrete; Asphalt pavements; Compaction; Density; Mix design; Pavement performance; Thickness

Highways; Maintenance and Preservation; Materials; Pavements

TRIS, TRB, ATRI

Jul 15 2019 9:34PM