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The geopolymeric materials present a viable alternative as concretes, the durability of these materials is associated to expected environmental conditions and one of the problems is their corrosion. The objective of this study was to assess the durability of geopolymeric materials through the chemical attack by sulfuric and hydrochloric acids with 5% concentration. After synthesis of the geopolymeric materials, followed by curing at room temperature for 28 days and then the geopolymeric materials were subjected to cycles of chemical attacks, which consisted of periods of seven days of immersion and seven days of drying at room temperature, four cycles were provided. The geopolymeric materials were characterized and it was found that they exhibit adequate resistance to chemical attack, the adequate strength consisted of determining the mass loss in each cycle attack.
This study aimed to synthesize geopolymer materials using the ash of burned rice husk. The material was prepared from bauxite slurry, rice hull ash was calcined at 600 °C, metakaolin and sodium hydroxide 12 M solution. The material was cured at 60 °C for 6 h and then at ambient temperature for up to 28 days. We used the same mixture of experimental design to synthesize geopolymer. Through techniques spectroscopy energy dispersive X rivers and X-ray diffraction, it appears that the silica and alumina contents of the identified raw material meets the conditions laid down as minimum for precursors with geopolymer activation potential, as evidenced by the molar ratio Si/Al sample. Geopolymer obtained from the XRD patterns showed characteristic peaks of hydrated calcium silicate. It was found that the particles had irregular shapes and sizes, and the presence of voids affecting the strength of the material. The geopolymeric material obtained showed improvements in the bending strength in a curing time of 28 days.
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