The role of chemical additives in forming the properties of customs cements

Abstract

The influence of surfactant of the mentioned types in the composition of the CD on the beginning of stamina, the duration of the induction period and the strength of alkaline cement with the content of blast furnace granulated (hereinafter referred to as slag) from 50 to 100% in the composition of the aluminosilicate component. When replacing the alkaline component with metasilicate sodium, the duration of the induction period does not change significantly. However, with an increase in the amount of slag to 88 - 100% and a corresponding increase in the content of the alkaline component in  the cement, the effectiveness of  anionic surfactant is reduced, which  is accompanied by a reduction in the duration of the induction period to 0,5 hours. However, regardless of the content of  the  slag component, the type and flow of the alkaline component in the cement, the introduction of additives of the same type, but another structure - in the form of oxyethylated fatty alcohols and cyclic - determines the decline in the strength of cement. The effectiveness of the surfactant, taking into account the nature of the main substance for the periods of stamina, the duration of the induction period, and the strength of the cement stone on the basis of varies slag-portland cement depending on the cost of the alkaline component, the content of which is determined by the ratio between the clinker and slag in the composition of cement. According to the determined indicators, the effectiveness of the anionic surfactants in the composition of the complex additive decreases and the role of cationic and noninogenic surfactants is increased.