Tag: hot-mix asphalt (HMA)

Roadbuilding
Plant Management of RAP/RCA
Processing and storage makes reclaimed asphalt and recycled concrete aggregate useful as aggregate.
November 6, 2013
Raw RAP stockpile (foreground) is reduced to consistent sizes by a mobile impact crusher.
Roadbuilding
Long Live Asphalt Pavements
The perpetual pavement project on California’s I-5 has sparked a trend in the state for asphalt pavements designed to last 40 years with minimal maintenance.
October 2, 2013
PMA was used in the top 3 inches of this project, and AR-8000 was used in the other layers, including the 3-inch-thick, “rich bottom” layer. The variability in structural pavement thickness is concentrated in the varying thickness of the middle layer(s).
Roadbuilding
Beware Premature Aging of Binder
Take care with liquid asphalt binder to avoid thermal crack failure.
June 6, 2013
Reclaimed asphalt pavement (RAP) is fed to crushing circuit in advance of incorporation into warm asphalt mix.
Roadbuilding
Special Transportation Research Board 2013 Report
‘Bio-Binder’ Green Modifiers star at TRB.
April 3, 2013
Fig.1: Biomass pyrolysis for production of bio-binder.
Safety
Volvo CE offers Road Institute courses
Volvo Construction Equipment is offering courses during the 2012-2013 Road Institute. The course curriculum offers two- to five-day sessions beginning in October and continuing through May 2013, with classes held at two training facilities in North America. These facilities are located in Chambersburg, Pennsylvania, and Phoenix, Arizona. Road Institute focuses on the hot-mix asphalt (HMA) […]
August 16, 2012
Roadbuilding
Road Science
Intelligent compaction . . . application of reclaimed asphalt pavement (RAP) and recycled concrete aggregate (RCA) . . . prefabricated bridges and pavements. They’re just a few of the themes of research papers presented at the 91st Transportation Research Board meeting in Washington, D.C., Jan. 23-27.
March 20, 2012
Intelligent Compaction data may be viewed using overall project view, here viewed using Veda Software.
Roadbuilding
Cracking Cold
Solving the Riddle of RAP and Thermal Cracking
February 17, 2012
Crow Wing County, Minn., is fighting low-temperature cracking of virgin and RAP mixes by using a warm-mix asphalt additive.
Roadbuilding
Highway Contractor
Technologies taking form under the watchful eyes of the National Asphalt Pavement Association and the Federal Highway Administration.
August 2, 2011
With warm-mix asphalt, “it’s important that we add the technology as part of the mix design,” says FHWA’s Mike Corrigan, “That way, we can identify where there potentially could be issues, especially where you have a high-traffic application such as an Interstate.”
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