Other than portland cement, concrete may perhaps have other cementitious products which include fly ash, a waste byproduct from coal burning electrical electric power vegetation; floor slag, a byproduct of iron and steel producing; and silica fume, a waste byproduct through the manufacture of silicon or ferro-silicon metallic. Some of https://altbookmark.com/story21561982/detailed-notes-on-concrete-reinforced-retaining-wall