A retarding additive forms a protective coating within the surfaces with the cement particles. The barrier decreases access by water molecules for the unhydrated cement, consequently it retards the hydration reactions. The effects of those inclusions (mineral admixtures, fibers, and air entrainment) on the hearth functionality of concrete are summarized https://messiahfkfvf.blogproducer.com/39073989/the-best-side-of-concrete-chemicals