Retarders versus Set Stabilizers When concrete is cast, a retarding admixture is often used to keep the mixture workable until finishing is completed. By shotcreteweb|2022-02-16T16:50:27+00:00January 6th, 2014| Share This Story, Choose Your Platform! FacebookTwitterRedditLinkedInWhatsAppTumblrPinterestVkEmail About the Author: shotcreteweb