After nearly three years of examination, the United States Patent Office has validated the Hoffman Green Cement Technologies H-EVA patent (US 2021/0179492 A1). Promoted as an alternative to portland cement for ready mixed concrete, mortars and plaster, H-EVA encompasses flashed clay sludge, natural or synthetic (flue gas desulphurization) gypsum, plus proprietary chemical “activators and superactivators.” The mineral processing and chemistry…
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Separation Technologies’ Zeigler headlines AshTrade Americas conference
Source: GMI Global LLC, Larchmont, N.Y.
Organizers of AshTrade 2014, October 14-15 at the Houston Marriott North, have finalized an agenda catering to participants from across the coal combustion byproduct value chain—buyers, sellers, traders, end users—with presentations covering fly ash, bottom ash and synthetic gypsum.
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