Lightweight mortar prepared with cork granulate

摘要

The present invention relates to lightweight mortars, consisting of 20 to 55% of limestone or siliceous aggregate; 30 to 70% of hydraulic binders; 5 to 15% of cork granulate; 0.5 to 10% of calcium hydroxide or magnesium hydroxide; 0.05 to 1.0% of a cellulose derivative; 1 to 5% of re-dispersible powder; 0.01 to 2% of a hydrophobic powder; 0.005 to 0.5% of an air introducing agent; and 0 to 0.5% of an air introducing agent and a retraction control agent. The invention also relates to the process for the preparation of such mortars using an aggregate with natural and renewable origin. These mortars are lightweight and, in addition to properties of thermal and acoustic insulation, they have excellent durability, excellent performance facing fire with absence of flame and toxic gases release.