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How to Process Fly Ash to Get CementXAllan Robinson Allan Robinson has written numerous articles for various health and fitness sites. Robinson also has 15 years of experience as a software engineer and has extensive accreditation in software engineering. He holds a bachelors degree with majors in biology and mathematics. By Allan Robinson, eHow ContributorFly ash is the ash that flies into the chimneys of coal-burning power plants. Its one of the residues from burning coal and is usually considered to be a waste product. The specific composition of fly ash varies considerably, but it generally contains a substantial amount of silicon dioxide and calcium oxide. Fly ash may be disposed of in landfills or added to concrete to reduce the amount of the Portland cement need to make the concrete. Other People Are Reading How to Purchase Fly Ash in Arkansas How to Measure Fly Ash in Liquid Print this articleThings Youll Need Fly ash Hydrated lime, Portland cement or quicklimeShow MoreInstructions1.o 1Use Class F fly ash to make cement. This type of fly ash results from burning the older, harder coals known as bituminous coal and anthracite. The lime content of class F fly ash is below 10 percent and it contains alumina and silica.o 2Add a cementing agent to Class F fly ash. This type of fly ash has pozzolanic properties, meaning that it has a cement-like quality when combined with a proper cementing agent such as hydrated lime, Portland cement or quicklime.o Sponsored Links New sampler teamLiquistation CSF48, Liquiport 2010 CSP44o 3Use Class C fly ash to make cement. This type of fly ash is produced by burning younger lignite and has some self-cementing properties. Class C fly ash does not require an activator and generally contains more than 20 percent lime. Cement made with Class C fly ash will harden and gain strength over time in the presence of water.o 4Compress a mixture of fly ash and water under 4,000 pounds per square inch and cure it in a steam bath at 150 degrees Fahrenheit for 24 hours. This technique produces fly ash brick, which can replace up to 50 percent of the Portland cement in concrete. In contrast, unprocessed fly ash can only replace 30 percent of the Portland cement in concrete.o 5Make asphalt concrete with fly ash. All types of fly ash may be used as a mineral filler in asphalt concrete mixes. Fly ash also improves the asphalt concretes durability and resistance to rutting.Sponsored Links Quality Assured Fly Ar cement replacement, Export to Asia, Africa and Middle East Free DNS HDual Stack: IPv6 and IPv4 Includes Dynamic DNS Support Batchbin Dosing SFor Powder and Fiber Additives. Your Smart Dose of Flexibility. Valme concrete pipeswww.valme.itDesign, production and direct sale of high quality concrete pip