how much would this be

[Rednosesam]

check this out

 

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[tamrock]

There is a cost in removing big piles of it, as ground up granulated slag is often used in concrete in combination with Portland cement as part of a blended cement. Ground granulated slag reacts with water to produce cementitious properties. Concrete containing ground granulated slag develops strength over a longer period, leading to reduced permeability and better durability. Since the unit volume of Portland cement is reduced, this concrete is less vulnerable to alkali-silica and sulfate attack. It's also used as railroad ballast.