More Articles for National Center for Asphalt Technology (NCAT)

Plant Management of RAP/RCA

Better Roads Staff - Nov 06, 2013

Plant Management of RAP/RCA

Processing and storage makes reclaimed asphalt pavement and recycled concrete aggregate useful as aggregate.   By Tom Kuennen, Contributing Editor   In the past two decades, reclaimed asphalt pavement (RAP) and recycled concrete aggregate (RCA) have taken their places among materials commonly used for ...

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Loss of Cover

Better Roads Staff - Jul 05, 2013

Loss of Cover

Decoding the secrets of asphalt stripping and raveling   By Tom Kuennen, Contributing Editor     Raveling describes the loss of aggregate from the driving surface of a bituminous concrete pavement. Loss of aggregate through raveling encourages pothole formation and cracking, which can introduce water ...

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Mix Optimization

Tina Grady Barbaccia - May 06, 2013

Mix Optimization

A formula for greenbacks and green roads When it comes to mix-design optimization, two goals stand out: dollars to be saved and how sustainable a road you can build. This means doing your homework and understanding calculations in mix design, explains ...

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Rap Up

Better Roads Staff - Mar 06, 2013

Rap Up

Making high-RAP mixes -- an art and a science   By Daniel C. Brown, Contributing Editor     Many state transportation departments have saved tens of millions of dollars by using reclaimed asphalt pavement. RAP is worth the same as the virgin materials it replaces. ...

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Pavement Preservation Coded in MAP-21

Better Roads Staff - Feb 07, 2013

Pavement Preservation Coded in MAP-21

    For the first time, pavement preservation is part of national surface transportation reauthorization legislation, which now explicitly supports preservation and asset management. Pavement preservation techniques are promoted as cost-effective and environmentally sustainable strategies designed to extend the life of existing pavements ...

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RoadWorks

Better Roads Staff - Nov 30, 2012

RoadWorks

Mixes and Ground Tire Rubber   By John Latta, jlatta@randallreilly.com     A study from the National Center for Asphalt Technology (NCAT) confirms that ambient and cryogenic ground rubber provides performance benefits in asphalt and the asphalt manufacturing process. The study, Effect of Ground Tire Rubber ...

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Applications & Innovations

Better Roads Staff - Jul 03, 2012

Using RAS   Recycled asphalt shingles are an acquired taste   When going from the roof to the road in recycled asphalt pavement (RAP) mixes, “it’s all in the details,” says John Christensen, technical marketing manager for MeadWestvaco (MWV). It’s not impossible to get density ...

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Road Science

Better Roads Staff - Apr 06, 2012

Road Science

Asphalt a la Carte Modifiers Control Mix Performance Petroleum (literally, rock oil) is one of the most important gifts of the union of carbon and hydrogen. But instead of being a simple compound (like water), petroleum is a natural product, a complex ...

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Road Science

Better Roads Staff - Nov 13, 2011

Road Science

?%# What percentage of RAP is best? It depends. T here are powerful inducements today to reuse reclaimed asphalt pavement (RAP) in a variety of applications. And the big question about RAP has shifted from whether it belongs in mixes at all, ...

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Road Science

Better Roads Staff - Sep 07, 2011

Road Science

Science Friction Thin Open-Graded Surfacings Drive Market By Tom Kuennen, Contributing Editor Now, more than ever, thin open-graded friction courses (OGFCs) are driving the market for drainable, high-friction, noise-attenuating asphalt mixes. This new generation of OGFCs is being bolstered by the advent of high-performance ...

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Stretching a road maintenance budget with fine milling

Tina Grady Barbaccia - Aug 23, 2011

Stretching a road maintenance budget with fine milling

Doing more with less and aggressively seeking new ways to stretch budget dollars are how many businesses respond to a tough economic climate. Federal and state highway and transportation departments are no exceptions. Fortunately, academic research and equipment technology communities ...

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Highway Contractor

Better Roads Staff - Aug 02, 2011

Highway Contractor

Warm Mix Asphalt Rolls into Place Technologies taking form under the watchful eyes of the National Asphalt Pavement Association and the Federal Highway Administration By Mike Anderson There is little doubt that even the most staid and traditional of road agencies and contractors ...

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