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 of permitted and authorized alternative fuels; reduced equipment idle times; and, performed process inspections and conducted audits to reduce unnecessary power usage. All three plants implemented measures to optimize energy consumption.

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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 “an ancient lost art rediscovered by modern science.”

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Roanoke Cement commended for safety, air quality

State and county officials on behalf of the North Carolina Department of Labor and County of Forsyth, respectively, honored Roanoke Cement Co.’s Winston-Salem terminal for outstanding safety and air-quality compliance. Roanoke Cement Co. is a subsidiary of Titan America LLC.

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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 control (100% portland cement) and ash (5% portland cement substitution) mixes. After the bars’ 14-day exposure in a NaOH solution, Centre founder Børge Johannes Wigum (This email address is being protected from spambots. You need JavaScript enabled to view it.) observed dramatically lower AAR expansion in the ash (0.02%) versus the control (0.45%) specimens.

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