Characteristics of Fluorine -Containing High So ₃ Clinker for Improving Sulfate Resistsnce

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Key Points

The aim is to improve sulfate resistance of limestone blended cement using fluorine-containing clinker.
Produced high SO3 clinker by adding CaF2 as a mineralizer using a small rotary kiln.
Assessed clinker characteristics and cement properties post-production.
Analyzed the effects of varying SO3 levels on mineral composition and strength of the clinker.
Adding CaF2 reduced the C3A (tricalcium aluminate) amount without significant impact on cement properties.
Increased SO3 levels led to higher C2S (dicalcium silicate) and reduced C3S (tricalcium silicate) and C3A.
At 1.8% SO3, long-term strength improved while initial strength was maintained despite lower C3S and C3A.

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Evaluates clinker characteristics to enhance sulfate resistance in cement, indicating promising mineral composition effects.

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OZAKI et al. (2026) studied this question.

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