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← ScienceWhich consequence result when hydroxide concentration exceeds saturation limits in cement?
A)Etter crystallization causes expansive microcracking✓
B)Carbonation increases, halting calcium silicate hydration
C)Chloride ingress accelerates reinforcing steel corrosion
D)Sulfate attack generates excessive gypsum formation
💡 Explanation
Etter crystallization causes expansive microcracking because an increased hydroxyl supply encourages the **nucleation and growth of expansive crystals** within the cement matrix. Therefore, microcracking ensues, rather than carbonation which requires CO2, or chloride/sulfate exposure.
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