Seven chemical admixture types according to ASTM 494 Categories

ASTM C494 specifies the requirements for seven chemical admixture types. They are below:

Polycarboxylic ether

· Type A: Water-reducing admixtures

· Type B: Retarding admixtures

· Type C: Accelerating admixtures

· Type D: Water-reducing and retarding admixtures

· Type E: Water-reducing and accelerating admixtures

· Type F: Water-reducing, high range admixtures

· Type G: Water-reducing, high range, and retarding admixtures