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Sulphate resistance of OPC, OPC/fly ash and SRPC pastes: pore structure and permeability

✍ Scribed by D.C. Hughes

Publisher: Elsevier Science
Year: 1985
Tongue: English
Weight: 505 KB
Volume: 15
Category: Article
ISSN: 0008-8846
DOI: 10.1016/0008-8846(85)90091-2

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✦ Synopsis

Fly ash is a slow acting pozzolana and requires substantial curing to achieve its potential strength and durability properties. Results are presented of the sulphate resistance, permeability and pore size distribution of OPC, OPC/fly ash and SRPC pastes variously cured before immersion in O.7M Na2SO 4. A range of pores is identified which are particularly susceptible to sulphate attack and a qualitative relationship established between the variation, with curing, of the entry size of these pores, the permeability of the paste and sulphate resistance. I004

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By-product fly ash from coal combustion influences the properties of cement pastes significantly.A study has been carried out to contribute to understanding the behavior and function of fly ash and other substituents in cement pastes. Comparisons are made with the properties of pastes of as-recelved