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← ScienceWhich outcome results when rapid hydration dynamics overwhelms portlandite formation?
A)Excessive ettringite develops via sulfate attack
B)Early stiffening caused by calcium aluminates✓
C)Increased cohesive van der Waals forces
D)Reduced aggregate pore blockage occurs
💡 Explanation
Early stiffening results because rapid hydration promotes preferential formation of unstable calcium aluminates via the precipitation mechanism due to competition for calcium. Therefore cement prematurely sets, rather than forming preferred portlandite which contributes to overall strength.
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