Green enough for 35W concrete, toxic coal ash is also used on farms
(MN) The Minnesota Independent – Coal fly ash, a byproduct of coal-fired power generation, is gaining a reputation as a green building material when used to make concrete, but due to toxins it contains, its use in agricultural applications may be cause for concern.
A large amount of fly ash that has found a home near downtown Minneapolis has been receiving lots of attention lately: The superstructure of the new 35W bridge is composed of 25 percent fly ash, and the bridge’s piers, footings and shafts all contain 16 to 18 percent fly ash. The ash is used as a substitute for Portland cement, a key component of concrete. More
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POSTED: Monday, April 13th, 2009
