A controlled release formulation for a cement-based composition can be produced by intercalating an admixture (e.g. an accelerator, a set retarder, a superplasticizer) for the cement-based composition into a layered inorganic material (e.g. a layered double hydroxide (LDH)). A cement-based composition...http://www.google.com.au/patents/US7879146?utm_source=gb-gplus-sharePatent US7879146 - Controlled release of chemical admixtures
