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 ASTM would remove fly ash from project specifications in its concrete standard if EPA determined CCRs were a hazardous waste when disposed.” It is unclear if the Society, known for its consensus process, would adopt that position, EPA staff counters, especially as other (non-C) committees provide specifications for reuse of solvents that are classified hazardous wastes.

Read more ...

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.

Read more ...

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.”

Read more ...

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.

Read more ...

Let's stay in touch!

All of the latest news and our digital edition sent to your inbox once a week.

We'll never share your email address, and you can opt out at any time, we promise.

Resource Center