Consider the following statement.
1. C2S and C3S need approximately 24 and 21% water by weight respectively for chemical reaction.
2. C3S liberates nearly three times as much calcium hydroxide on hydration as C2S.
3. A higher percentage of C2S results in slow hardening.
4. A higher percentage of C2S results in less heat of hydration and greater resistance to chemical attack.
Which of the above is/are correct?
1
2 and 3
2
1, 3 and 4
3
2, 3 and 4
4
2 and 4