For the following questions answer them individually
Which of the following compounds of Portland cement reacts immediately with the water and set early?
In the concrete mix with proportions of its ingredient 1:3:6, the actual quantity of sand per unit volume of cement, if bulking of the sand is 15% is ______.
Which of the following tests are used for testing of tiles?
1. breaking strength test
2. impact test
3. transverse strength test
4. water absorption test