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Correlation between reaction and expansion of alkali-carbonate reaction

โœ Scribed by Liang Tong; Mingshu Tang

Publisher
Elsevier Science
Year
1995
Tongue
English
Weight
538 KB
Volume
25
Category
Article
ISSN
0008-8846

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โœฆ Synopsis

Compacted cylinders made of reactive minerals (dolomite and magnesite) and Portland cement in the ratio of 4: 1 were prepared to observe the expandability of the two solid-volume-reducing reactionmlkali-dolomite and alkali-magnesite reaction. After measuring the reaction degrees determined by quantitative XRD analysis, it was found that expansion correlated well with the degree of the reaction occurred in the compacts. This result provided a positive evidence towards the previously proposed expansion mechanism, which suggested that the expansion of alkalicarbonate reaction is due to the formation and growth of the reaction products in confined space.

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