Discussion
Match the type of cement in column A with its corresponding application in column B.
| Types of cement | Applications |
|---|---|
| 1. Portland slag cement | A. Cold weather concreting works |
| 2. Low heat Portland cement | B. Offshore structures |
| 3. Rapid hardening cement | C. Resistance to corrosion of reinforcement |
| 4. Super sulphated cement | D. Water retaining structures like dams |
Answer: C
The correct matching is 1-C, 2-D, 3-A, 4-B. Portland slag cement has good resistance to chemical attack, so it protects reinforcement from corrosion (1-C). Low heat Portland cement gives off less heat of hydration and is used in massive water-retaining structures such as dams (2-D). Rapid hardening cement gains strength quickly, which makes it suitable for cold weather concreting (3-A). Super sulphated cement resists sulphates and sea water, so it suits offshore structures (4-B). The other codes swap these pairs.
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