AVALIAÇÃO EXPERIMENTAL DO USO DE CIMENTO CP IV E ADIÇÃO DE METACAULIM EM CONCRETOS AUTOADENSÁVEIS

Anderson Renato Vobornik Wolenski; Anelize Borges Monteiro; André Luís Christoforo; Francisco Lledo dos Santos; Roque Luiz da Silva Pitangueira

Authors

Anderson Renato Vobornik Wolenski Mestrandos em Engenharia de Estruturas pela Universidade Federal de Minas Gerais (UFMG), Programa de Pós-Graduação em Engenharia de Estruturas.
Anelize Borges Monteiro Mestrandos em Engenharia de Estruturas pela Universidade Federal de Minas Gerais (UFMG), Programa de Pós-Graduação em Engenharia de Estruturas
André Luís Christoforo Doutor em Engenharia de Estruturas. Professor Adjunto II do Programa de Mestrado em Materiais e Processos de Fabricação da Universidade Federal de São João Del-Rei (UFSJ).
Francisco Lledo dos Santos Doutorando em Engenharia Elétrica pela UNESP - Ilha Solteira. Professor Efetivo do Departamento de Engenheiro Civil da Universidade do Estado de Mato Grosso (UNEMAT).
Roque Luiz da Silva Pitangueira Doutor em Engenharia Civil. Professor Associado do Departamento de Engenharia de Estruturas da Universidade Federal de Minas Gerais (UFMG).

Keywords:

Mechanical properties, Rheological properties, Special concretes

Abstract

This paper presents an experimental study about the Self-Compacting Concrete (SCC), in order to check its feasibility based on the use of Pozzolanic Portland Cement and aggregates available in Mato Grosso, in the use of Metakaolin addition and of
superplasticizer additives coming from Brazil's southeast. In the step of dosing, Marsh Cone tests, to the paste stage, Kantro test, to the mortar stage, were carried out, as well as tests on the concrete stage, such as Slump Flow, V-Funnel, J-Ring, L-Box, U-Shaped Pipe, and the test of compressive strength in the three phases to obtain the mechanical parameters. Concretes with water/cement ratio equal to 0.45 have been prepared using two superplasticizers which resulted in a concrete with compressive strengths exceeding 40 MPa. The analysis of the results showed that the dosage process of the SCC was effective, through a rigorous technological control. It was verified the possibility of its application in structures that require a concrete with high fluidity and workability and the impracticability of its application in situations that require fast removal of the molds, as it is the case of precast industries.