Any time you increase the concrete retarder while in the concrete mix may end up in extending the environment time in the concrete by somewhere around up to 1 hour. The results of those inclusions (mineral admixtures, fibers, and air entrainment) on the fire general performance of concrete are summarized https://airentrainingconcrete08305.bcbloggers.com/31555895/indicators-on-air-entraining-concrete-you-should-know