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Day: December 30, 2018

Engine manufacturers take note as EPA revisits NOx emissions threshold

Concrete News
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Through its just-announced Cleaner Trucks Initiative (CTI), the U.S. Environmental Protection Agency aims to further decrease nitrogen oxide (NOx) emissions from on-highway heavy-duty trucks and update a current engine exhaust standard in an early-2020 rulemaking. Set in 2001, the standard culminated in 2010 with a 0.2-gram brake-horsepower-hour NOx threshold for which engine manufacturers deployed selective catalytic reduction (SCR) equipment and urea-based diesel exhaust fluid (DEF). SCR injects DEF into the engine exhaust stream; the ensuing chemical reaction converts NOx into nitrogen, water vapor and traces of carbon dioxide.

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FMCSA replicates mixer driver exemption for concrete pump peers

Concrete News
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American Concrete Pumping Association members have secured a five-year exemption from the Federal Motor Carrier Safety Administration requirement that short-haul drivers utilizing the records of duty status exception return to their normal work reporting location within 12 hours of clocking in. It enables all concrete pump operators, pumping companies, and truck drivers who run concrete pumps to use the short-haul exception but return to their work-reporting location within 14 hours.

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Market needs, processing innovations perpetuate fly ash recycling success

Concrete News

Cement and concrete contribute to an impressive recycling story detailed in the American Coal Ash Association’s Production and Use Survey released last month. It indicates that 64 percent, or 71.8 million tons, of the coal combustion product (CCP) volume generated during 2017 was recycled. That represents a new record rate and marks the third consecutive year where more than half of CCP tracked in the United States was beneficially used. Concrete, cementitious material and cement producers using fly ash or lesser residuals accounted for nearly 33 percent, or 23.5 million tons, of last year’s recycled CCP volume.

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