More Articles for aggregates

Beware Premature Aging of Binder

Better Roads Staff - Jun 06, 2013

Beware Premature  Aging of Binder

Take care with liquid asphalt binder to avoid thermal crack failure   Thermal cracking – also known as low temperature cracking – in bituminous pavements appears as a series of transverse cracks that extend across the pavement surface in response to cold ...

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Road Science

Better Roads Staff - Dec 01, 2012

Road Science

Pre-Measure Your Carbon Footprint   Calculators help predict the environmental impact of roadbuilding projects     By Tom Kuennen, Contributing Editor   New tools keep appearing to help the highway, road and bridge community determine the environmental impact of the infrastructure they design and build. Last month we ...

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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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Applications & Innovations

Better Roads Staff - Sep 06, 2012

Applications & Innovations

Whispering Asphalt   OGFCs cut spray and can be very, very quiet.   For several years, a number of states have placed open-graded friction courses (OGFCs) as a wearing course on their high-volume, high-speed roadways. An OGFC is a thin, permeable mix with high air ...

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RoadScience

Better Roads Staff - May 06, 2012

RoadScience

A Concrete Solution: Admixtures Change PCC Performance By Tom Kuennen, Contributing Editor Portland cement concrete (PCC) is the most widely used structural material in transportation infrastructure, and it’s widely used for pavements as well. But the control of freshly mixed PCC properties is ...

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NSSGA: House action gets us one step closer to passing a final transportation bill

Tina Grady Barbaccia - Apr 19, 2012

The U.S. House of Representatives’ passage on April 18 of a surface transportation bill that includes a 90-day extension (from July 1 through Sept. 30) at current funding levels, as well as language approving the Keystone XL pipeline, brings the ...

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Applications and Innovations

Better Roads Staff - Dec 02, 2011

Applications and Innovations

Mill-And-Fill Math Making sure the numbers add up is the first step to a successful job That mill-and-fill job up for bid may seem the exact boost your company needs right now. It may very well be, says Terex Roadbuilding’s John West, but ...

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Road Science

Better Roads Staff - Oct 04, 2011

Road Science

It's a Small, Smart World Nanotech era draws closer By Tom Kuennen, Contributing Editor Nanotechnology offers long-term promise to boost performance of our highway, road and bridge infrastructure. New research is expanding and new applications are materializing. More recently, the long-term environmental impacts ...

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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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Martin Marietta Q2 results: Net sales were $426.7 million, down from $442.8 million in Q2 2010

Tina Grady Barbaccia - Aug 03, 2011

Martin Marietta Materials, Inc. (MMM) announced results on Aug. 2 for the second quarter and six months ended June 30, 2011. Ward Nye, president and CEO of Martin Marietta Materials, says in the MMM earnings report that "despite a continuing difficult ...

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Polaris Minerals Q2 results = $4.72 million

Tina Grady Barbaccia - Aug 09, 2010

Canada-based Polaris Minerals Corp. on Aug. 9 reported financial results for the quarter ended June 30, 2010. (Note: All financial results are in U.S. dollars unless otherwise noted.) Sales in the second quarter of 2010 were 344,000 tons generating revenue of ...

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INDOT new paving specs allow more RAP

Tina Grady Barbaccia - Apr 22, 2010

In honor of Earth Day, the Indiana Department of Transportation (INDOT) announces new paving specifications that allow for additional use of recycled materials. By increasing the amount of reclaimed asphalt pavement and recycled roofing shingles within asphalt mixes, INDOT anticipates ...

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