Exemplos de uso da microscopia eletrônica de varredura no estudo da carbonatação do concreto

Abstract

The increasing need for and interest in the carbonation of concrete has raised the motivation for the present study. The construction industry has begun to turn more and more to the question of the durability of structures. The increase in daily consumption of cement has raised serious concerns regarding the useful life of the constructions, due to the high rate of CO2 emitted during the production of the same. Carbonation occurs through the diffusion of CO2 into concrete structures or even cement paste, an aggressive agent present throughout the planet. Along with carbonation comes also the degradation of structures, cracks, cracks, corrosion of reinforcements, among others. This study aims to analyze studies already published in A1 magazines that deal with the carbonation of concrete with different additions and / or additives in each one using the scanning electron microscopy equipment as a fundamental instrument to qualify the samples and obtain better results. Different results were found in each of the studies, some benefiting from the impossibility of carbonation, others less. The studies also raise beyond carbonation the compressive strength and mechanical strength of some samples after being brought to different curing, carbonation and deterioration processes