National Academies Press: OpenBook

Impact of Asphalt Thickness on Pavement Quality (2019)

Chapter: Abbreviations

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Page 58
Suggested Citation:"Abbreviations." National Academies of Sciences, Engineering, and Medicine. 2019. Impact of Asphalt Thickness on Pavement Quality. Washington, DC: The National Academies Press. doi: 10.17226/25498.
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Page 58
Page 59
Suggested Citation:"Abbreviations." National Academies of Sciences, Engineering, and Medicine. 2019. Impact of Asphalt Thickness on Pavement Quality. Washington, DC: The National Academies Press. doi: 10.17226/25498.
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Page 59

Below is the uncorrected machine-read text of this chapter, intended to provide our own search engines and external engines with highly rich, chapter-representative searchable text of each book. Because it is UNCORRECTED material, please consider the following text as a useful but insufficient proxy for the authoritative book pages.

58 AC asphalt concrete ACP accumulated compaction pressure AIP air induced permeameter ANOVA analysis of variance APA Asphalt Pavement Analyzer AR aged residue grading used in California ATLAS accelerated loading CAM crack attenuating mix used in Texas DC(T) disk-shaped compact tension test DOT Department of Transportation ESAL equivalent single-axle load FHWA Federal Highway Administration Gmb bulk specific gravity (of asphalt mix) Gmm maximum theoretical specific gravity (of asphalt mix) Gsb aggregate bulk specific gravity Gse aggregate effective specific gravity GTR ground tire rubber HMA hot mix asphalt HVS heavy vehicle simulator IC intelligent compaction IRI international roughness index LCCA life cycle cost analysis LTPP long-term pavement performance LSL lower specification limit MAS maximum aggregate size MEPDG Mechanistic-Empirical Pavement Design Guide, now called PavementME MOT maintenance of traffic MSHA Maryland State Highway Administration Ndes design number of gyrations in Superpave gyratory compactor NAPA National Asphalt Pavement Association NCAT National Center for Asphalt Technology NMAS nominal maximum aggregate size Pba binder absorption PCC portland cement concrete PCS primary control sieve PFC permeable or porous friction course PG performance grade PMB polymer-modified binder Abbreviations

Abbreviations 59 psy pounds/sq. yard PWL percent within limits RAP recycled asphalt pavement RAS recycled asphalt shingles SAPA State Asphalt Pavement Association SGC Superpave gyratory compactor SHRP Strategic Highway Research Program SMA stone matrix asphalt RZ restricted zone t lift thickness t/NMAS lift thickness ratio TRID Transport Research International Documentation (https://trid.trb.org) VMA voids in mineral aggregate WMA warm mix asphalt

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TRB’s National Cooperative Highway Research Program (NCHRP) Synthesis 537: Impact of Asphalt Thickness on Pavement Quality documents transportation 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 the report is designed to 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.

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