Influence of water-reducing additives with Portland cement paste at different temperatures
The use of additives in mortars and concrete is currently essential for the improvement of performance required by the construction industry, for example, by improving workability (increased fluidity) or by enabling high-strength concrete. In addition, additives can also reduce the need for water in mixtures, thus reducing the demand for Portland cement and, consequently, generating a considerable decrease in product costs, since cement is the material with the highest value in mortars and concretes. This consumption reduction is still very interesting in the environmental context, considering that the Portland cement industry is one of the main responsible for the release of carbon dioxide into the atmosphere (approximately 8%). However, there is still a lot to be studied regarding the interaction cements/additives, after all, they are complex chemical reactions that affect and determine the conditions of cement mixtures. Therefore, the most varied aspects that impact on the use of additives in cementitious matrices, including the temperature of production and application of concrete and mortars, must be considered. Based on this, in my research, I seek to evaluate the relationships between different cements and additives, as well as the effect that the increase in temperature affects such relationships.