Portlandite consumption by red ceramic waste due to alkali activation reaction

Authors

  • Gustavo Macioski Doctoral student, Graduate Program in Civil Construction Engineering, UFPR, Rua Evaristo F. F. da Costa, 369-377, CEP 81531-980, Curitiba, Paraná, Brazil http://orcid.org/0000-0001-8489-4328
  • Nicolle Talyta Arriagada Soto Doctoral student, Graduate Program in Civil Construction Engineering, UFPR, Rua Evaristo F. F. da Costa, 369-377, CEP 81531-980, Curitiba, Paraná, Brazil http://orcid.org/0000-0003-2538-4744
  • Marcelo Henrique Farias de Medeiros Professor, Graduate Program in Civil Construction Engineering, UFPR, Rua Evaristo F. F. da Costa, 369-377, CEP 81531-980, Curitiba, Paraná, Brazil http://orcid.org/0000-0003-3112-9715
  • Juarez Hoppe Filho Professor, Exact Sciences and Technologies Center, UFOB, Rua Professor José Seabra de Lemos, 316, CEP 47808-021, Barreiras, Bahia, Brazil http://orcid.org/0000-0002-9645-6808
  • Marcia Silva de Araújo Professor, Academic Department of Mechanics, UTFPR, Rua Deputado Heitor Alencar Furtado, 5000, CEP 81280-340, Curitiba, Paraná, Brazil http://orcid.org/0000-0003-3864-1201
  • José Alberto Cerri Professor, Academic Department of Civil Construction, UTFPR, Rua Deputado Heitor Alencar Furtado, 5000, CEP 81280-340, Curitiba, Paraná, Brazil http://orcid.org/0000-0003-3081-3400

Keywords:

Construction and demolition waste, red clay waste, alkali activation, pozzolan activity, porosity

Abstract

Red ceramics, due to the low compressive strength and high porosity, make it difficult to use it as an artificial aggregate in the production of mortars and concretes. However, since it has a silicon-rich composition, the ceramic material from blocks and tiles has been studied as a possible supplementary cementitious material in concrete and also as a raw material in alkali-activated binders. This paper aims to evaluate the content of calcium hydroxide (portlandite) fixed in the alkali activation reaction and the microstructure of red clay waste from construction and demolition waste (CDW) and hydrated lime mixtures, varying the atomic ratio between the silicon and the calcium. The results indicated that higher availability of lime is directly related to the content of hydrated compounds and its porosity. The increase in the silicon/calcium ratio resulted in a reduction of available lime content by 40% and an increase, in volume, of micropores by 7%.

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Author Biography

Gustavo Macioski, Doctoral student, Graduate Program in Civil Construction Engineering, UFPR, Rua Evaristo F. F. da Costa, 369-377, CEP 81531-980, Curitiba, Paraná, Brazil

Construção Civil na área de Materiais e Componentes de Construção pela UFPR com período sanduíche na Universidade de Ottawa no Canadá. Possui mestrado em Engenharia Civil na área de Materiais e Componentes de Construção pela UTFPR (2017), especialização em Engenharia de Segurança do Trabalho pela UTFPR (2015), graduação em Engenharia Civil pela UFPR (2014) e curso técnico em edificações pela UTFPR (2010).

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Published

2020-12-14

How to Cite

MACIOSKI, G.; SOTO, N. T. A.; MEDEIROS, M. H. F. de; HOPPE FILHO, J.; ARAÚJO, M. S. de; CERRI, J. A. Portlandite consumption by red ceramic waste due to alkali activation reaction. Ambiente Construído, [S. l.], v. 21, n. 1, p. 7–21, 2020. Disponível em: https://seer.ufrgs.br/index.php/ambienteconstruido/article/view/98137. Acesso em: 25 jun. 2025.

Issue

Vol. 21 No. 1 (2021)

Section

Artigos

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ISSN 1678-8621

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