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The binding of chloride ions by sulphate resistant portland cement

✍ Scribed by A.K. Suryavanshi; J.D. Scantlebury; S.B. Lyon

Publisher: Elsevier Science
Year: 1995
Tongue: English
Weight: 755 KB
Volume: 25
Category: Article
ISSN: 0008-8846
DOI: 10.1016/0008-8846(95)00047-g

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✦ Synopsis

The relative tendency of different portland cements to remove chloride ions from the mix water by forming chloro-complexes is an important factor in the study of the corrosion of the embedded steel. The tri-calcium aluminate(C3A) phase of the ordinary portland cement(OPC) plays a dominant role in binding the chloride ions, but little quantitative information is available in the literature concerning the relative influence of the tetra-calcium aluminoferrite(CaAF) phase of the cement. The present investigation is an attempt to elucidate the role of C4AF in the sulphate resistant portland cement with respect to chloride binding. It is concluded that the chlorides in SRPC are bound in the form of the chloro-complex C,F.CaC12. of the cement. lOH,O which is derived from the C4AF phase

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