EPA Weighs Fly Ash Concrete Stigma Vs. Broader Coal Ash Hazardous Waste Label

In its proposed regulation of power plants’ coal combustion residuals (CCR) under the Resource Conservation & Recovery Act (RCRA), EPA acknowledges potential backlash a hazardous waste designation might have on beneficial uses of concrete. The agency’s Federal Register posting (above item) cites a letter from December 2009—then a working deadline for proposed rule publication–wherein ASTM Committee C09 officers “indicated that…

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Feds Place Three Cemex Plants in 2010 Energy Star Ranks

The U.S. Environmental Protection Agency and U.S. Department of Energy have awarded the 2010 Energy Star to Cemex USA cement plants in Clinchfield, Ga.; Louisville, Ky.; and Demopolis, Ala. Over the last year, the plants conducted compressed air system surveys to identify leaks; installed more efficient motors; completed staff energy-training programs; upgraded lighting systems with motion sensors; increased the use…

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Author Traces Rediscovery of Great Pyramid-Era Binder

A new book describes a silicate rock, made without heat or pressure, as a potential aggregate-binding substitute for portland cement in a range of building and infrastructure concrete conditions. The Great Pyramid Secret: Egypt’s Amazing Lost Mystery Science Returns claims the artificial rock, when mixed with aggregates, “forms concrete that has fooled geologists,” and concludes that the silicate compound represents…

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Iceland engineers confirm volcanic ash’s binding, AAR-quelling properties

The International Centre of Research and Applied Technology for Alkali Aggregate Reactions has confirmed AAR-mitigating potential in ash from April’s Eyjafjallajökull volcano eruption, crediting the material’s particle fineness and approximately 60% silicon dioxide content. Using methods from ASTM C 1260 Multi-Laboratory Study of the Accelerated Mortar Bar Test for Alkali-Silica Reaction, staff at the Mannvit Engineering-housed facility prepared specimens from…

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PCA names Titan America, Cemex chiefs to top board posts

Convening in Palm Beach, Fla., for its fall meeting, the Portland Cement Association board of directors elected Titan America CEO Aris Papadopoulos chairman and Cemex USA President Gilberto Perez vice chairman, both for two-year terms. Papadopoluous, who succeeds GCC of America’s Enrique Escalante, has been at the helm of Titan America and Titan Atlantic in Norfolk, Va., since 1994, overseeing…

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World slag demand on the rise as supplies declines

Driven by low-carbon and other environmental policies, demand for ferrous slag in cement and aggregates industries worldwide stands to outstrip supply, according to a new study released by IntertechPira, Leatherhead, UK. No longer mere disposable iron and steel manufacturing by-products, the data suggests, ferrous slag, i.e., blast furnace and various types of steel slag, will become increasingly marketable as consumption…

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CalPortland to pay $350K in penalties for Clean Air violations

The U.S. Department of Justice, on behalf of the U.S. Environmental Protection Agency, recently lodged a consent decree resolving Clean Air Act claims against CalPortland Co. concerning the company’s Rillito, Ariz., cement plant. EPA’s complaint alleged that CalPortland did not obtain permits required by the Clean Air Act. The company agreed that it will either upgrade equipment, such as baghouses…

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Mark Kuhar Editor, Rock Products and Cement [email protected] Mark S. Kuhar is the editor of Rock Products and Cement Americas. A graduate of Ohio University, he began his editorial career in 1987 as an assistant editor on Pit & Quarry and Concrete magazines. Since taking over the helm of Rock Products in 1996, the magazine has become the aggregates industry’s premier publication. He continues to develop…

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About Us

Cement Americas, from the publisher of Rock Products, brings focus to issues affecting cementitious materials suppliers. Cement Americas: The only publication reporting on cementitious materials suppliers in North and South America. Highly respected for editorial coverage of operations, environment, government and market-development issues. Featuring Latin American and other international correspondents. Affiliated With Semco Publishing’s annual Cement Map, Cement Directory and International Cement…

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