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Sulfate corrosion of portland cement-pure and blended with 30% of fly ash

✍ Scribed by Mirjana Djuric; Jonjaua Ranogajec; Radovan Omorjan; Sasa Miletic

Publisher: Elsevier Science
Year: 1996
Tongue: English
Weight: 457 KB
Volume: 26
Category: Article
ISSN: 0008-8846
DOI: 10.1016/0008-8846(96)00127-5

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✦ Synopsis

This paper considers the sulfate corrosion of Portland cement-pure and blended with 30 wt% of fly ash. As raw materials, three kinds of Portland cements, with different content of GA (5.45-l 1.84 wt%), were applied. Fly ash was added so as to decrease the GA content (to 3.82-8.29 v&Oh). The test samples were exposed to the influence of aggressive environment (solutions with 1000 and 2000 mg/l of the SOi* ions as well as 320 mg/l of the NH4" ions). Experiments lasted six months, while the flexural strengths were measured after 1,2,4 and 6 months. The corrosion resistance factor was calculated. For the examined systems, a correlation was suggested. It expresses the resistance factor as a function of three independent variables (the GA content, duration of corrosion process and concentration of the SOi2 ions).

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