Concreto aditivado com pseudoboemita e poliacrilato de sódio

• Autor(a) principal: Pacheco, Caroline Valadão
• Data de Publicação: 2020
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações do Mackenzie
• Texto Completo: https://dspace.mackenzie.br/handle/10899/28439
• topic: nanomateriais; pseudoboemita; concreto; poliacrilato de sódio; CNPQ::ENGENHARIAS::ENGENHARIA CIVIL

Pseudoboemite is a hydrated aluminum oxyhydroxide obtained from inorganic precursors by the sol-gel process and is used as a precursor to alumina as a reinforcement in obtaining nanocomposites. In this work, pseudoboemite with the addition of sodium polyacrylate was used in order to promote an increase in the spacing of the particles of pseudoboemite, which agglomerate in the material. The material obtained was added to the concrete in order to improve its workability and strength. The new concrete obtained was characterized by means of rheological, mechanical and microstructural tests. The results showed that the addition of pseudoboemite with sodium polyacrylate significantly increased the compressive strength and improved the workability of the concrete. In order to evaluate these properties, tests were made on cone trunk abatement, compression resistance test, ultrasound and characterization of the nanomaterial. The compressive strength data showed a tendency to increase the compressive strength with the addition of pseudoboemite and sodium polyacrylate.