AÇÕES MITIGADORAS DA REAÇÃO ÁLCALIS AGREGADO COM EMPRESAS ATUANTES NO MERCADO IMOBILIÁRIO DO RECIFE

• DOI: 10.22533/at.ed.4331920085

• Palavras-chave: Concreto; Reação Álcali- Agregado; Fundações; Recuperação.

• Keywords: Concrete. Alkali-Aggregate Reaction. Foundations. Recovery.

• Abstract:

  The Alkalis-Aggregate Reaction

  (RAA) is a chemical reaction that was discovered

  more than eighty years ago in road structures

  in the state of California in the United States. Over the years, the reaction has been

  diagnosed in several countries and in the most varied types of structures. In Brazil,

  the first diagnoses of RAA occurred in structures such as dams and hydroelectric

  power plants. It was only in the middle of the last decade that cases began to be

  found in residential and commercial building foundations, mainly in the Metropolitan

  Region of Recife (RMR). In this work a research was developed where a questionnaire

  was applied with 29 constructors, 05 calculators and 05 concretes operating in the

  construction market. With this questionnaire, aiming to raise the measures taken to

  mitigate the reaction. With the constructors the objective was to show that measures

  and materials are being used as prevention. With the calculators the purpose was to

  visualize what changes occurred in the structural projects and with the concrete ones

  to identify the measures taken to verify the reactivity of the aggregates. Through this

  study it was possible to observe that the constituent members of this research took

  several preventive measures such as the use of additions in the confection of their

  concretes, as well as the use of tests to verify the potential reactivity of the aggregates.

• Número de páginas: 15