Influence of Metakaolin on the Properties of Cement Systems

Abstract

Finely dispersed mineral additives containing amorphous SiO2 are successfully used in cement concretes for various purposes. Their use is due to increased durability, strength, water resistance. One of the most famous and widely used pozzolanic modifiers is microsilica. Microsilica is obtained from a waste from the production of siliconcontaining alloys containing up to 95% pure amorphous silica. Microsilica has such a disadvantage as highwater demand. To compensate, the introduction of a large amount of superplasticizer is required. In recent years, highly active metakaolin (MTK) has become increasingly popular in the world as a highly effective pozzolanic additive. This is an artificial environmentally friendly material produced from pure kaolinites. The growing popularity of MTK is due not to the fashion for new products, but to the objective advantages of this material. The purpose of this work is to study the use of metakaolin as an additive in the production of cement concrete coatings, to determine the main mechanical properties of cement beams based on activated metakaolin. Scientific research methods at work – analysis, observation, experiment, modeling