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Name:   
Heading: 1.1.2Bottom ash Compositon
Message:
Can Bottom ash be use instead of Fly ash inconcrete as subsitute to cement? Does anybody have information about chemical composition of bottom ash? does it have heavy metals?


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Mario Bacic


Pulverised fuel ash or fly ash is used as a partial replacement of cement because it is pozzolanic in character. It acquires the characteristics because of the glass content, formed during the coal combustion in the boiler. Bottom ash does not contain glass, hence cannot replace fly ash. However it can be used as fine aggregates in concrete, after removal of carbon and proper testing.

Dr J D Bapat
http://in.linkedin.com/in/jdbapat
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Dr J D Bapat


I agree with Mario Bacic, in addition to his comments I would also add that Bottom ash contains sulfur as well, depending on the source of coal and burning procedures.

Dr.M.Soomro
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Mahfooz Soomro
 
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