Estudo da sinergia entre nano sílica e micro sílica em argamassas para aplicação em concretos como proposta de melhoria de desempenho

Abstract

Nowadays, in consequence of construction development, there is an increase in the size of the civil construction works, which the use of materials with better performances are required to meet the demand for quantity, efficiency, applicability and feasibility. One of the materials most researched, due to the extensive use in construction is the concrete, which is produced from several materials. To improve the performance of concrete has been developed several studies that aim to identify the most efficient characteristics in the categories of workability, strength and durability. In the design of these products is common to use mineral additions, including the nano silica and silica fume, both pozzolan reagents with cement hydration products. A good proportion between the mineral addition and the material composition of the concrete may be the most significant factor for its production feasibility. Seeking to improve the performance of the constituents of conventional concrete, the study of this paper has focused on the use of two types of pozzolan, nano silica and silica fume, demonstrating their potential to improve the mechanical and physical characteristics of mortars for use in concrete. Furthermore, the analysis of the results of mortars and foundation in theoretical review verified the viability of application of nano silica and silica fume in conventional concrete as an alternative to enhance performance, since it made the rational use of components and materials additions.