More Articles for asphalt binder

The Magic of Rubberized Asphalt

Better Roads Staff - Mar 07, 2014

The Magic of Rubberized Asphalt

As prices for asphalt cement (AC) and polymer have shot up dramatically, agencies and contractors are looking for ways to hold the line on the cost of asphalt pavements.   By Daniel C. Brown   The number of transportation agencies that use recycled tire ...

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Long Live Asphalt Pavements

Better Roads Staff - Oct 02, 2013

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. As traffic whizzed nearby on busy Interstate 5 in California, Shirley Choate and Chris Cummings watched an asphalt ...

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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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Road Science

Better Roads Staff - Oct 09, 2012

Road Science

What Went Wrong, and Why   Forensic Studies Give Clues to Pavement Failure By Tom Kuennen, Contributing Editor   Whether the pavement is black or white, flexible or rigid, asphalt or concrete, pavement forensic testing is the key to preventing future pavement failures in either ...

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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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Cracking Cold

Better Roads Staff - Feb 17, 2012

Cracking Cold

Solving the Riddle of RAP and Thermal Cracking   By Tom Kuennen, Contributing Editor Use of reclaimed asphalt pavement (RAP) in hot-, warm- and cold-mix asphalt is growing dramatically, as tests validate its use in ever-increasing quantities. But there are fears that higher quantities ...

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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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Road Science Tutorial

Brooke Wisdom - Mar 01, 2011

Road Science Tutorial

Partnerships Promote Preservation Philosophy Regional Partnerships Link State, Local Agencies with State-of-the-Art Pavement Preservation Practice. By Tom Kuennen, Contributing Editor As road agencies strapped for cash look for ways to optimize their limited dollars, many are taking a much closer look at the ...

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Highway Contractor: RAP — Making new fans across the country

Brooke Wisdom - Feb 01, 2010

Highway Contractor:  RAP — Making new fans across the country

by Daniel Brown, Contributing Editor With workability, environmental benefits and solid performance reports,Reclaimed Asphalt Pavement — RAP — is becoming a bigger part of the mix.   It’s a trend that’s sweeping the nation: using more reclaimed asphalt pavement (RAP) in hot-mix asphalt. ...

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