Aside from portland cement, concrete may include other cementitious elements including fly ash, a waste byproduct from coal burning electric electricity crops; floor slag, a byproduct of iron and steel manufacturing; and silica fume, a squander byproduct with the manufacture of silicon or ferro-silicon steel. Many of these cementitious resources https://bookmarkyourpage.com/story5202378/the-best-side-of-concrete-reinforced-stone