CHEMICAL-MINERALOGICAL ANALYSIS OF COMMERCIAL PORTLAND CEMENTS

Authors

  • Anne Kelly de Souza Machado Borges Federal University of Campina Grande
  • Osires de Medeiros Federal University of Campina Grande
  • Ana Maria Gonçalves Duarte Mendonça Universidade Federal de Campina Grande

Abstract

The chemical characterization of a material is important due to the need for proper selection based on the performance of the system under study, being able to describe aspects of composition, structure, mainly aiming to estimate the performance over the material's useful life, minimizing the possibility of degradation and failures undesirable during use of the product. This study aimed to identify which is the major component among Portland cement CP II-E-32, CP III-40 RS, CP IV-32 RS, and CP V-ARI, as well as which of these presents greater mass loss. For this, the four Portland cement were collected, processed in a sieve number 200 (opening of 0.074 mm), and submitted to them differential and thermogravimetric analysis and X-ray fluorescence, identifying the thermal behavior of the cement against temperature rise. It was found that the majority chemical composition of the analyzed samples was Calcium Oxide (CaO), presenting results that corroborate technical standards and existing studies. Portland cement type CP II-E-32 showed excessive loss to fire and this loss could not be associated with exposure to the external environment, as the product was packed correctly. Mass losses occur in fixed temperature ranges and, therefore, it is important to carefully characterize the cement as it allows recognizing the behavior of structures produced with this material.

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Author Biographies

Anne Kelly de Souza Machado Borges , Federal University of Campina Grande

Professora Substituta de Engenharia Civil no Instituto Federal da Paraíba e Engenheira Civil pela Universidade Federal de Campina Grande

Osires de Medeiros, Federal University of Campina Grande

Engenheiro Civil pela Universidade Federal de Campina Grande; Especialista pela UniBF; Mestrando em Engenharia Civil e Ambiental pela Universidade Federal de Campina Grande.

Ana Maria Gonçalves Duarte Mendonça, Universidade Federal de Campina Grande

Química pela Universidade Estadual da Paraíba; Mestra em Ciência e Engenharia de Materiais pela Universidade Federal de Campina Grande; Doutora em Ciência e Engenharia de Materiais e em Engenharia de Processos pela Universidade Federal de Campina Grande; PhD em Estrutura e Geotécnica pela Universidade Federal de Campina Grande; Professora Colaboradora da Pós Graduação em Engenharia Civil e Ambiental pela Universidade Federal de Campina Grande.

Published

2021-08-11

Issue

Section

Artigos