LOW COST ACCELERATOR FOR PORTLAND CEMENT

摘要

This invention discloses an accelerating admixture for Portland cement favouring high compressive strength development, in particular at early curing ages, and comprising: a) aluminium hydroxide or alumina and/or sodium aluminate; b) aluminium sulphate; c) hydrofluoric acid; and/or d) inorganic or organic phosphorus based acid or salts; and/or e) boric acid or a boron derivative; and/or f) ascorbic acid; and/or g) urea.