Sulfate corrosion of Portland cement -- Pure and blended with 30% of fly ash

Journal Article · Sun Sep 01 04:00:00 EDT 1996 · Cement and Concrete Research

DOI:https://doi.org/10.1016/0008-8846(96)00127-5· OSTI ID:377993

Djuric, M; Ranogajec, J; Omorjan, R ^[1]; Miletic, S ^[2]

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1. Univ. of Novi Sad (Yugoslavia). Faculty of Technology
2. Inst. for Material Science, Belgrade (Yugoslavia)

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 C{sub 3}A (5.45--11.84 wt%), were applied. Fly ash was added so as to decrease the C{sub 3}A content (to 3.82--8.29 wt%). The test samples were exposed to the influence of aggressive environment (solutions with 1,000 and 2,000 mg/l of the So{sub 4}{sup {minus}2} ions as well as 320 mg/l of the NH{sub 4}{sup {minus}2} 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 C{sub 3}A content, duration of corrosion process and concentration of the SO{sub 4}{sup {minus}2} ions).

• OSTI ID: 377993
• Journal Information: Cement and Concrete Research, Journal Name: Cement and Concrete Research Journal Issue: 9 Vol. 26; ISSN 0008-8846; ISSN CCNRAI
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
36 MATERIALS SCIENCE
ACID RAIN
CHEMICAL COMPOSITION
CONCENTRATION RATIO
CORROSION RESISTANCE
CORROSIVE EFFECTS
FLEXURAL STRENGTH
FLY ASH
PORTLAND CEMENT
SULFATES
TIME DEPENDENCE
WASTE PRODUCT UTILIZATION