Estudo exploratório: traços monocomponente de metacaulim ativado alcalinamente

There is a growing demand for more sustainable development in civil construction, with alternatives to Portland cement emerging every day. Geopolymers are binders with high potential to replace Portland cement. The material can be produced through two types of synthesis, the first called bicomponent where a solid precursor is homogenized with a liquid alkaline activator. The second, called monocomponent, uses solid-state precursors and activators, which are homogenized with the addition of water. In the development of a geopolymetric cement with superior characteristics to conventional cement, it becomes essential to determine the proportions of the constituent materials in this mixture. Focusing on the evaluation of physical and mechanical properties, this work aims to synthesize an alkaline-activated monocomponent geopolymetric mix. Two different types of metakaolin were evaluated, and four main compositions were formulated in combination with other materials, totaling 17 mixes. The compositions for analysis were modified, initially focusing on compressive strength in the first 24 hours of curing. From the most promising mix, tests were conducted for later ages and physical characterizations. The results suggest notably high compressive strengths in the early stages of curing, stabilizing in the long term, except for the 28 days.