Consider the following statements:
1) Hydrophobic cement grains possess the low wetting ability
2) Rapid-hardening cement is useful in concreting under static, or running water
3) Quick-setting cement helps the concrete to attain high strength in the initial period
4) White cement is just a variety of ordinary cement-free of coloring oxides.
Which of the above statements are correct?1
1 and 4 only
2
1 and 3 only
3
2 and 4 only
4
2 and 3 only