Science & Uses Articles

  • Power Plant Waste Could Be Used to Clean Up Oil From BP Disaster

    (Fast Company 8-5-2010) After over 100 days, the BP oil leak finally appears to be plugged. But while the White House claims that the vast majority of oil has evaporated or been cleaned up with burning, oil skimmers, and dispersants, there is still plenty of the sticky stuff lingering just below the ocean's surface. One potential solution: power plant waste.
     

  • RockTron's Recycling Revolution

    (Industrial Fules and Uses 8-2-2010) RockTron, an award-winning pioneer in recycling, has designed and built a new plant that can transform coal-fired power station waste, called fly ash or PFA (pulverised fuel ash), into highly valuable industrial eco-minerals. RockTron can recycle both fresh and stockpiled fly ash, reducing the need for costly and environmentally unfriendly long-term waste storage.Fly ash currently poses a huge global environmental problem, with an estimated 2bnt of fly ash currently stored in landfill sites and ash dumps worldwide, and over 100Mt in the UK alone.

  • 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.
     

  • 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.
     

  • Advances in New Concrete Technology

    (Aggregate Research 5-19-2010) There have been a number of advances in new concrete technology in the past ten years. There have been advancements made in almost all areas of concrete production including materials, recycling, mixture proportioning, durability, and environmental quality. However, many of these innovations have not been adopted by the concrete industry or concrete users / buyers. There is always some resistance to change and it is usually based on cost considerations and lack of familiarity with the new technology.
     

  • New Greener Building Standards - Reducing Greenhouse Gas Emissions

    (Aggregate Research 5-12-2010)  Widespread adoption of new building standards aimed in part at reducing greenhouse gas emissions is presenting the concrete industry with a difficult question: how do you make concrete with constructible properties and a smaller carbon footprint?
     

  • Recycling Transforms Fly Ash Into Eco-Minerals

    (Engineering Live 4-27-2010) RockTron's new plant at Fiddler's Ferry in Widnes, Cheshire, UK (Fig. 1), can recycle 800,000 tonnes of fly ash a year. It is designed to process both fresh and stockpiled fly ash, effectively solving the problems of large-scale waste storage and removal, site remediation and conservation of natural resources. This GGBS, or CEM I (Portland cement (PC)) substitution proposition, allows companies to cut their costs, increase their margins and maintain their bottom line. RockTron is currently negotiating new plants in the US, Malaysia and Russia.
     

  • Advanced Energy Stimulus Funds Approved for Mine Reclamation Project

    (Columbus - October 16, 2009) An innovative project aimed at reclaiming abandoned mine lands around Ohio was authorized for funding from the Advanced Energy Job Stimulus Program at the October meeting of the Ohio Air Quality Development Authority (OAQDA).

    The project also will test a potential, environmentally friendly method for using and disposing of byproducts created during combustion at Ohio’s coal-based power plants.

  • EPA Final Detailed Report on disposal of Coal Combustion Products

    (EPA Official Report 10-2009) This report summarizes the information collected and analyzed by the United States Environmental Protection Agency (EPA) to review discharges from the steam electric power generating industry and to determine whether the current effluent guidelines for this industry should be revised. EPA’s detailed study of wastewater discharges and treatment technologies associated with this industry evaluated a range of waste streams and processes.

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