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← ScienceWhich risk increases when applying excessive heat to hydrate a cement mixture?
A)Uncontrolled ettringite formation occurs✓
B)Delayed calcium silicate precipitation proceeds
C)Increased pozzolanic reaction efficiency
D)Enhanced workability retention happens
💡 Explanation
Excessive heat causes rapid, uncontrolled ettringite formation known as delayed ettringite formation (DEF). This mechanism results in internal stresses and cracking because the ettringite crystals expand, rather than leading to enhanced properties or delayed reactions within the proper hydration sequence.
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