A proposed ASTM International standard will provide a test method for properties of fresh roller compacted concrete, its development coinciding with the increasing specification of RCC for highway road base, streets, roads, parking lots and heavy industrial pavements.
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Regulatory uncertainty drives coal ash recycling to fourth straight year of decline
Coal ash recycling in the U.S. was off 4.7 million tons in 2012 against the prior year, according to the American Coal Ash Association (ACAA) “Production and Use Survey” released last month. Ash utilization has stalled after nearly a decade of growth of a practice that conserves energy and natural resources, reduces greenhouse gas emissions, and safely keeps ash out of landfills and disposal ponds.
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