Tag: fly ash

Roadbuilding
Mont. university develops affordable ultra-high performance concrete for state DOT
Researchers at Montana State University (MSU) have developed an ultra-high performance concrete that is approximately five times stronger than regular concrete, according to a university press release. The Montana Department of Transportation (MDT) asked Michael Berry, a professor in the Department of Civil Engineering, if the university’s Norm Asbjornson College of Engineering could help develop a more affordable, non-proprietary […]
March 13, 2018
MSU
Roadbuilding
New concrete mixture would allow roads to resist corrosion from road salt
Deicing salt is used on roads every winter to improve driving conditions, but the calcium chloride salt commonly used in this application reacts with the calcium hydroxide in concrete, forming a chemical byproduct called calcium oxychloride that causes roadways to degrade, crack, and crumble. According to a Drexel University press release provided to Phys.org, Yaghoob Farnam, a civil engineer, […]
May 29, 2017
Farnam cement
Roadbuilding
Acrete is a new concrete made from fly ash engineered to be lighter, stronger
Jinhong Zhang, an associate professor of mining and geological engineering at the University of Arizona’s (UA) College of Engineering, has developed a substitute for concrete, according to a university press release. The new material is made almost completely from fly ash and is said to be lighter, stronger and less expensive to produce than concrete. “Once the […]
March 6, 2017
Photo: Paul Tumarkin/Tech Launch Arizona
Construction Equipment
New concrete formula ditches Portland cement, adds strength and sustainability
Should a few major trials hold up as expected, an Australian family company will have succeeded in developing a new concrete that is not only better for the environment but stronger than the traditional formula as well. The construction materials and mining services company Wagners of Toowoomba, Australia, has spent the last eight years perfecting a […]
April 14, 2014
Wagners Earth Friendly Concrete being poured.
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
Evolving Overlays
Thinner concrete for preserving pavements is evolving.
September 9, 2013
evolving-overlayUntitled-1
Roadbuilding
To Prevent Failure, Begin with Better Bases
Fatigue cracking usually links to inadequate road foundations.
May 6, 2013
No patching can cure severe fatigue cracking, which indicates profound base failure; road ultimately was in-place foam-recycled with thin overlay.
Roadbuilding
Superthin Concrete Overlays
Spurred forward by some brave new thinking, the concrete pavment industry is moving toward thinner concrete overlays these days — down to three inches, even two inches.
October 9, 2012
“D” Construction crews finish a freshly placed section of bonded concrete overlay on an existing asphalt pavement on Route 53 in Will County, Ill. The project used stringless paving technology on what was the old U.S. Route 66 alignment.
Roadbuilding
Highway Contractor
Researchers dig into sub-bases.
October 9, 2012
Bauma Untitled 1
Roadbuilding
Road Science
Asphalt emulsions mix oil with water.
June 9, 2012
Asphalt emulsions – here sprayed in advance of chip spreader – are essential to nearly every aspect of pavement preservation.
Roadbuilding
RoadScience
Admixtures change PCC performance.
May 6, 2012
Interaction of cement grains (left) and microsilica fume (right) takes place at the nanoscale.
Roadbuilding
Road Science
Modifiers Control Mix Performance.
April 6, 2012
In central California, terminal blend of rubberized asphalt liquid is injected into production of warm mix asphalt
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