Argamassa de alto desempenho com adição de sílica extraída da casca de arroz

Abstract

In recent years there has been an increase in studies on recycling and reuse of waste in construction leading to the development of numerous researches about the effects of incorporating this waste in the production of new materials for construction. In this sense, this work aimed to evaluate the influence of structured nanosilica extracted from rice husk on the mechanical resistance to compression and on the durability parameters of mortars. The silica extracted from the rice husk was incorporated into the mortar preparation and evaluated for its influence on mechanical strength. The results show that the silica extracted from the ashes of the rice husks has the potential to be used in making mortar. In higher concentrations, silica is able to further improve the compressive strength of mortars, given its pozzalonic reaction, which provides a decrease in calcium hydroxide when reacting with each other and forming more dense crystals of hydrated silicates, as well as by reducing mortar pores.