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Title: Measurement of Asphalt Concrete Temperatures During Transport with the Use of an Instrumented Probe System
Accession Number: 01514903
Record Type: Component
Record URL: Availability: Transportation Research Board Business Office 500 Fifth Street, NW Find a library where document is available Abstract: Recently, so-called warm technologies have provided the paving industry with a considerable amount of versatility by increasing the options available to perform a given project. The ability to mix at traditional hot-mix temperatures and to compact at warm-mix temperatures is one of these options, because doing so can allow for long-haul distances. Warm technologies are fairly new to the United States, and documentation of their use on long-haul-distance projects is not abundant. This paper presents successful full-scale use of an instrumented probe system developed to simultaneously measure temperature at multiple locations within an asphalt mix while it was hauled for an extended period of time (10 h+). The data collected spanned haul distances far beyond those needed for any conceivable conventional application and likely exceeded distances needed for any emergency application. Probe temperature measurements appeared to be as reliable as well-accepted temperature measurement with asphalt thermometers. For representation of most of the mix in a truck with cooler material near the edges, a laboratory short-term aging protocol was recommended for long hauls of 6 h or less that held mixes at 15°C to 20°C below their mixing temperature for all but the last few minutes before they were progressively cooled to the desired compaction temperature. Additional findings illustrated the significant amount of time that most of a truck’s asphalt could retain heat and provide temperature gradient measurements from just inside the truck bed to near the center of the truck bed.
Monograph Title: Monograph Accession #: 01534208
Report/Paper Numbers: 14-0912
Language: English
Authors: Howard, Isaac LPagination: pp 78–85
Publication Date: 2014
ISBN: 9780309294997
Media Type: Print
Features: Figures
(9)
; Photos; References
(10)
; Tables
(1)
TRT Terms: Subject Areas: Construction; Highways; Materials; Pavements; I31: Bituminous Binders and Materials; I52: Construction of Pavements and Surfacings
Files: PRP, TRIS, TRB, ATRI
Created Date: Jan 27 2014 2:22PM
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