Question

If you increase the cement content in your concrete mix design you can expect which two of the following to be true:

a) A higher early strength
b) A change in slump and improved workability
c) An increase in the temperature of the mix which would produce longer set times
d) A decrease in the air content of air-entrained mixes

Answer

Answers (a) and (d) are true. As for answer (b), there would be a possible change in slump but less workability. As for (c), while you could expect an increase in temperature, this would produce shorter rather than longer set times.