Identify the correct statement with respect to various types of admixtures used in making concrete.
1
Addition of Superplasticizers in making concrete decreases the workability of concrete for a given water cement ratio.
2
Use of retarders in making concrete allows the concrete to increase the rate of early strength development in concrete
3
Accelerating admixtures are added to allow the concrete to be plastic and workable for a longer time than concrete without accelerators.
4
Addition of Superplasticizers in making concrete decreases the water cement ratio required to attain a particular degree of workability.
5
Question Not Attempted