Other than portland cement, concrete may well have other cementitious elements which includes fly ash, a waste byproduct from coal burning electrical electric power plants; floor slag, a byproduct of iron and steel manufacturing; and silica fume, a squander byproduct in the manufacture of silicon or ferro-silicon metallic. Some of https://condonearme82581.ageeksblog.com/34584501/the-fact-about-concrete-reinforced-steel-that-no-one-is-suggesting