Limestone Processor Enters Concrete Market

Huber Carbonates launched HuberCrete, a series of ground calcium carbonates for fly ash substitution and self-consolidating concrete mixes, at the 2018 Precast Show in Denver. The product is processed in Prime, Preferred and Extra Fine grades of these respective median particle size and Blaine fineness profiles: 15-24 µm, 300-500 m2/kg; 8-13 µm, 500-700 m2/kg; and 3-5 µm, 700-1,000 m2/kg.

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Aggregate Industries Products Central to Sustainable Construction Project

Aggregate Industries US made a huge contribution to the new MGM National Harbor project on the eastern shore of the Potomac River, just south of Washington, D.C. The 1 million-sq.-ft. facility – which will feature gaming, lodging, entertaining, dining, retail and parking space – is a showcase for sustainability. 

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EPA Will Not Regulate Fly-Ash As Hazardous Material

The Obama administration announced the first federal regulations for disposal of fly-ash from power plants in an attempt to shield the environment from the toxic substance, however it will not define fly-ash a “hazardous material.”The new rule from the Environmental Protection Agency (EPA) sets structural integrity standards for all existing and new disposal sites to reduce the chances that they…

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Limestone Cited as Benefit to Green Concrete

By Mark S. Kuhar Adding limestone powder to “green” concrete mixtures – those containing substantial amounts of fly ash, a byproduct of coal-burning power plants – can significantly improve performance, according to researchers from the national Institute for Standards and technology (NIST) and the Federal Highway Administration (FHWA).

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