A professor at Missouri University S&T is looking to pave the way to stronger concrete while simultaneously keeping fly ash out of landfills. Fly ash is the smallest particle found in coal ash. It is a byproduct of coal-burning power plants and has been used in concrete since the construction of Hoover Dam. But Dr. Jeffery Volz is developing a formula that will double the amount of fly ash used in concrete.Although this will decrease carbon dioxide in the air, there is concern for heavy metals leaching out of the concrete into the water supply.“When we put it in concrete, the chemistry is actually altered and if there are any trace elements, heavy metals, mercury, things like that they are all bound into the concrete. They don’t leach out of the concrete so it’s even better than putting...