Consider the following option. Which of the following increase the workability?
1. Higher water content.
2. For given water content, big-size aggregates increase workability.
3. Uniformly graded aggregate increases workability.
4. Entrained air in a concrete mixture will greatly increase cohesion.
1
1, 2 and 3
2
1, 2 and 4
3
1 and 3
4
2 and 3