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A collection of some key research papers presented at the American Society of Civil Engineers' 2012 GeoCongress: glass in sub bases, triaxial geogrids; coal ash's value in bases; and subgrade stiffness and LTPP.
Working with the American Concrete Pavement Association, we examine two subjects high on the must-read list for engineers today: Very thin concrete overlays and roller-compacted concrete. Both are heading into new territory.
Our seven-part series on The Chemistry of Road Building Materials concludes with a look at road failure analysis; including, how steel corrosion occurs in reinforced concrete pavements; how the bonds of liquid asphalt to aggregate deteriorate and break over time; and the science behind portland cement concrete alkali-silica reactivity and sulfate attack. We also investigate the new generation of nondestructive pavement analysis tools.
It's a fairly common question. Which piece of equipment is better? The dominant answer is that the wheels or tracks choice largely depends on the job; but that doesn't mean that the decision is simple.