Concept

Fly ash brick

Résumé
Fly ash brick (FAB) is a building material, specifically masonry units, containing class C or class F fly ash and water. Compressed at 28 MPa (272 atm) and cured for 24 hours in a 66 °C steam bath, then toughened with an air entrainment agent, the bricks can last for more than 100 freeze-thaw cycles. Owing to the high concentration of calcium oxide in class C fly ash, the brick is described as "self-cementing". The manufacturing method saves energy, reduces mercury pollution in the environment, and often costs 20% less than traditional clay brick manufacturing. https://civilmint.com/fly-ash-brick/ History Coal dust has historically been collected as a waste product from homes and industry. During the nineteenth century, coal ash was taken by 'scavengers' and delivered to local b
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