Chemistry

Question 1

hydration of alite (C3S)

Answer 1

2C3S(100g) +6H (24g) = C3S2H3(75g) +3CH (49g) H=-500J/g

Question 2

hydration of belite (C2S)

Answer 2

2C2S(100g) +4H (21g) = C3S2H3(99g) +CH (22g) H=-250J/g

Question 3

reaction of aluminates (no Gypsum)

Answer 3

C3A(100g) + 6H(40g) = C3AH6(140g)

Question 4

reaction of aluminates (adequate gypsum)

Answer 4

C3A + 3CSH2 + 26H = C6AS3H32 H=-1350J/g

Question 5

reaction of ferrite

Answer 5

C4AF +2CH + 14H = C4(A,F)H13 + (A,F)H3

Question 6

reaction of aluminates (inadequate gypsum)

Answer 6

2C3A + C6AS3H32 +4H = 3C4ASH12

Question 7

reaction of sulphate attack

Answer 7

C4ASH12 +2CSH2 +16H = C6AS3H32