Influência do C3A em pastas de cimento portland : avaliação das propriedade reológicas / Influence of C3A on portland cement pastes : valuation of the rheologic properties

AUTOR(ES)

Fabrício Bassani dos Santos

DATA DE PUBLICAÇÃO

2004

RESUMO

The production of high performance concrete with special rheologic properties, fluidity and durability, demands the knowledge of physical and chemical characteristics of the used cement. The herein research studies the C3A influence on cement pastes, in order to add knowledge to all the aspects that can contribute to its rheologic behavior and, consequently, to mortars and concretes. It was select three Brazilian cements with different amounts of C3A and minimum additions to the clinker. It was made a composition of the cement and blast furnace granulated slag in order to obtain three different amounts of C3A. These materials were grind to have the same specific surface. The Theological behavior was studied through determination of the viscosity of the cement pastes, and correlating it with the spread surface obtained by the Kantro test. This test method was not efficient in showing the real rheologic behavior of the studied materials. It was possible to determinate the apparent viscosity with time through the use of a viscometer device, which has shown a peculiar rheological behavior to the different specimens and mixtures studied.

ASSUNTO(S)

portland cement reologia cimento portland viscosimetro viscometer rheology c3a kantro test

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