ABSTRACT
The use of admixtures in concrete is especially considerable for RCC. However, the knowledge of their types and quantities is of great importance to evaluate concrete properties and obtain a durable structure. Several types of concrete have been studied considering different amounts of mineral and pozzolanic admixtures, as follows: flyash, pozzolan, metakaolin, rice-husk ash, powdered aggregate, blast furnace slag and silica fume. All research has been focused on the mechanical and elastic properties and concrete durability. In addition to the aforementioned, microstructural observations of concrete samples through scanning electron microscopy with fracture samples (SE images) were conducted in order to investigate RCC microstructure in the presence of admixtures. This report presents results of tests, their evaluation and the prospect of estimating how workable RCC might be with these admixtures when applied to new construction technologies, such as concrete pavements and dams.
