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2 cards from this section. Quick, good the night before a test.
What is carbonation in concrete?
Think about how CO₂ affects concrete chemistry.
What does a pink color in phenolphthalein indicate?
Consider what pH levels lead to the pink color.
What does the phenolphthalein indicator test in concrete?
What aspect of chemical reaction does it measure?
True or False: A depth of carbonation less than 20 mm is considered safe for structural integrity.
What is the common threshold for safety?
A field study shows that a concrete sample has a carbonation depth of 45 mm after 10 years. Discuss potential remedial measures.
Consider both chemical and physical protective strategies.
Evaluate the impact of curing practices on the carbonation depth and overall structural performance over time.
Think about the relationships between hydration, pore structure, and carbonation rates.
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