Which of the following is a correct combination for admixture and its purpose as mentioned below? Type of Admixture: a. Plasticizer b. Air Entrainer c. Viscosity Modifier d. Accelerator Purpose: 1. Rapid setting concrete 2. High strength concrete 3. Light weight concrete 4. Self-compacting concrete
- Aa - 2, b - 3, c - 4, d - 1Correct
- Ba - 4, b - 3, c - 2, d - 1
- Ca - 2, b - 1, c - 4, d - 3
- Da - 2, b - 3, c - 4, d - 1
Solution
Concept
Admixtures and purposes
Step-by-step solution
1. Plasticizer → high strength (low w/c). 2. Air entrainer → lightweight concrete. 3. Viscosity modifier → self-compacting concrete. 4. Accelerator → rapid setting.
Explanation
Each admixture serves a different purpose.
Why the other options are wrong
Other codes swap the purposes.
Correct answer: A) a - 2, b - 3, c - 4, d - 1