Types of silicates Ÿ Sodiumsilicate: compound of silicate and the alkali metal sodium Ÿ Potassiumsilicate: compound of silicate and alkali metal potassium Ÿ Lithiumsilicate: compound of silicate and alkali metal lithium Ÿ (Colloidal silicates: pure silicatemolecules dissolved inwater) Greatly simplified structure of silicate The following table gives an overviewof the effects of using different types of silicate: * The market shows that silicate mixtures of different silicates are well accepted, as they combine the positive properties of each single silicate. silicate alkali metal alkali metal Sodium silicate Potassium silicate Lithium silicate Gelling effect time fast medium slow Reaction time with concrete fast medium slow Penetration into concrete less more more Hardening of concrete more medium - less* less* Water absorption of concrete more less* less* 45
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