Modiffiers are added to gypsum mainly to_______________?
Correct answer: C. Modify setting time
- A. Modify strength
- B. Modify setting expansion
- C. Modify setting time
- D. Decrease the porosity
Explanation
Modifiers are added mainly to control the setting reaction, especially by accelerating or retarding setting time. They can also affect expansion and strength, but setting-time control is the primary purpose here.
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