Push For Fly Ash Use in Roads

 
(India Times 7-12-2010) The environment department wants fly ash to be used extensively in various types of construction work, particularly roads and highways. The state flyash management committee will hold a meeting later this month to assess the progress made so far in this regard. 
 

Wave Of EPA Regulations Could Overshadow New Pollution Rule

(NASDAQ 7-10-2010) The U.S. Environmental Protection Agency released a major set of power-plant air-pollution rules this week, but even more far- reaching regulations are in the works.
 
Within the next several months, the EPA is expected to develop new rules to reduce mercury and hazardous air pollutants, while also creating standards for coal ash.
 
"This regulatory train wreck will have a big impact on the power sector," said Dan Riedinger, a spokesman for the Edison Electric Institute.
 

Air Entrainment and Its Effects

(Today's Concrete Technology 7-10-2010) Air entrainment is the process where many small air bubbles are distibuted into concrete and become part of the matrix that binds the aggregate together in the hardened concrete.
 
These air bubbles are dispersed throughout the hardened cement paste but are not, by definition, part of the paste (Dolch 1984). Air entrainment has now been an accepted fact in concrete technology for more than 45 years.
 

The Cost of Regulating Coal Ash in Wisconsin

(Milwaukee News 7-2-2010) New regulations for the disposing of coal ash proposed by the Environmental Protection Agency are likely to increase costs for utilities in Wisconsin, which are particularly dependent on coal – and those costs are expected to be passed on to consumers. The regulations may also make it more difficult for Milwaukee’s utility, WE Energies, to sell the ash, which is a byproduct of the coal burning process. It’s successfully marketed this waste product to concrete, cement and wallboard manufacturers.
 

Geo-Polymer Concrete Researcher Recognized for PCA Portland Cement Alternative

(Aggregate Research 7-1-2010)  Ivan Diaz-Loya, a senior PhD candidate with the Trenchless Technology Center (TTC) at Louisiana Tech University, has been awarded the prestigious Katharine and Bryant Mather Scholarship by ASTM International for his work in the area of geopolymer concrete, an environmentally friendly alternative to ordinary Portland cement-based concrete.
 

New Liberty Memorial Bridge Built With Lafarge Fly Ash Concrete

 High-performance fly ash concrete from Lafarge is playing a key role in achieving the high strength, long-term durability, and extended service life goals for the new Liberty Memorial Bridge in Bismarck, N.D., the company said.
 

AGENCY WEIGHS FLY ASH CONCRETE STIGMA VS. BROADER COAL ASH HAZARDOUS WASTE LABEL

(Concrete Products 6-21-2010) 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.
 

EPA OPENS COMMENT PERIOD ON COAL ASH DESIGNATION, DISPOSAL RULE

(Concrete Products 6-21-2010) In the June 21 Federal Register, EPA formally proposes a rule maintaining provisions for beneficial use of fly ash in concrete and other construction materials, but significantly tightening existing regulations’ treatment of nonconstruction-grade coal ash. The notice, “Management System; Identification and Listing of Special Wastes; Disposal of Coal Combustion Residuals [CCR] From Electric Utilities," opens a public comment period through September 20.
 

AZ Utilities Opposing Proposed US Coal-Ash Rule

(Arizona Daily Star 6-20-2010) Tucson Electric Power Co. and other coal-burning Arizona utilities are opposing proposed federal rules that would designate coal ash as a hazardous waste, calling them costly and unnecessary. Spurred by the disastrous failure of a dam holding back millions of cubic yards of wet coal ash in Tennessee in 2008, the U.S. Environmental Protection Agency announced last month it was proposing for public comment two plans for regulating coal ash storage and disposal.
 

EPA Releases More Electric Utility Plans to Improve Safety of Coal Ash Impoundments

(EPA 5-19-2010) The U.S. Environmental Protection Agency (EPA) is releasing action plans developed by 16 electric utility facilities with coal ash impoundments, describing the measures the facilities are taking to make their impoundments safer. The action plans are a response to EPA’s final assessment reports on the structural integrity of these impoundments that the agency made public this February.

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