Reação alcali-agregado : mapeamento de agregados reativos do Estado de São Paulo

by Valduga, Laila

Abstract (Summary)
Alkali-aggregate reaction is considered a deterioration related to spontaneous chemical reactions, to which the repair procedures are only palliative . Taken into account the reaction's prevention, the aim of this work was the evaluation and characterization related to the criterion of reactive potentiality of aggregates in the state of São Paulo. Another purpose of this work was to show a map of reactivity of aggregates from the studied region. Methods of petrographic analysis, potential reactivity determination by the accelerated method and chemical method, and even as an extra source the scanning electronic microscope . Of 26 locals from where samples were taken to be tested, 16 of them showed reactive aggregates, namely, about 60% of the total. The efficiency and reliability of each method could have been tested. The petrographic examination turned up to be a very useful technique, such as the accelerated method and the scanning electronic microscope. The chemical method was not considered effective for the types of aggregates studied. The mapping obtained from this work showed several areas with potentially reactive material in the state of São Paulo
This document abstract is also available in Portuguese.
Bibliographical Information:

Advisor:Vladimir Antonio Paulon; Vladimir Antonio Paulon [Orientador]; Ines Joekes; Gladis Camarini

School:Universidade Estadual de Campinas

School Location:Brazil

Source Type:Master's Thesis

Keywords:concreto materiais de construção durabilidade agregados patologia


Date of Publication:03/08/2002

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