workability admixtures

accelerators

retarders

air entraining agents

gypsum

calcium chloride

sodium silicate

all of the above

25%

40%

60%

80%

10 to 15% more

15 to 20% more

20 to 25% more

25 to 50% more

higher initial setting time but lower final setting time

lower initial setting time but higher final setting time

higher initial and final setting times

lower initial and final setting times