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What is the role of Zirconia (ZrO²) in the glass fiber used in GFRC production?
Zirconium Dioxide is added to the glass fiber matrix to provide “alkali resistance”. The higher the ZrO² content, the higher the level of alkali resistance. However, in practical terms, levels of ZrO² are limited at about 20%.
What is the minimum zirconia content required? I’ve noted that the fibres marketed in Europe,USA etc. have at least 16% zirconia. However, I’ve heard that some companies are selling fibres with 14% or less. What’s the recommended level?
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