Microstructure of cement paste with sugarcane bagasse ash under autoclave treatment

Authors

DOI:

https://doi.org/10.46421/enarc.v8i00.3030

Keywords:

Microstructure of cementitious materials, Reactivity of sugar cane bagasse ash, Hydrated Calcium Silicate, Use of agro-industrial residues

Abstract

Portland cement stands as one of the most extensively used resources in the world, releasing CO2 emissions and depleting non-renewable natural resources. Additionally, Brazil holds the position of the world's largest sugar cane producer, generating a significant amount of waste. A potential solution to these environmental concerns involves replacing a portion of the cement mass by supplementary cementitious materials. Thus, this study aims to analyze the viability of integrating sugar cane bagasse ash (SCBA) into cementitious materials subjected to autoclave curing. Cement pastes with 25% SCBA were prepared and cured at room temperature or in autoclave conditions. The microstructure was examined using XRD, SEM, and hardness analysis. At room temperature, SCBA did not exhibit pozzolanic activity. However, under hydrothermal conditions, the SCBA reacted with Ca(OH)2, resulting in the formation of xonotlite. Consequently, the hardness of the CBCA sample increased nearly threefold following autoclave treatment.

Author Biographies

Ander de Jesus Torres, Departamento de Engenharia de Materiais e Construção (DEMC) - Universidade Federal de minas Gerais (UFMG)

Aluno de Iniciação Científica no Departamento de Engenharia de Materiais e Construção (DEMC) - Universidade Federal de minas Gerais (UFMG) .

Miriam Júlia Rezende Brasil, Departamento de Engenharia de Materiais e Construção (DEMC) - Universidade Federal de minas Gerais (UFMG)

Aluna de Iniciação Científica no Departamento de Engenharia de Materiais e Construção (DEMC) - Universidade Federal de minas Gerais (UFMG) .

Mateus Bravo de Aguiar, Departamento de Engenharia de Materiais e Construção (DEMC) - Universidade Federal de minas Gerais (UFMG)

Aluno de Iniciação Científica no Departamento de Engenharia de Materiais e Construção (DEMC) - Universidade Federal de minas Gerais (UFMG).

Maria Teresa Barbosa, Universidade Federal de Juiz de Fora (UFJF)

Doutorado em Engenharia Civil pela Universidade Federal do Rio de Janeiro (2002). Atualmente é professora titular da UFJF, revisor de periódicos indexados (American Concrete Institute, Ambiente Construído, Engenharia Estudo e Pesquisa, dentre outros), consultor ´ad hoc´ da FACEPE, avaliador de instituição de educação superior do Ministério da Educação e Cultura. 

White José dos Santos, Departamento de Engenharia de Materiais e Construção (DEMC) - Universidade Federal de minas Gerais (UFMG)

Professor do Departamento de Engenharia de Materiais e Construção (UFMG-2012) e Doutor em Engenharia Civil (UFV - 2014).

Dayana Cristina Silva Garcia, Departamento de Engenharia de Materiais e Construção (DEMC) - Universidade Federal de minas Gerais (UFMG)

Professora Adjunta do Departamento de Engenharia de Materiais e Construção da Universidade Federal de Minas Gerais. Doutorado em Ciência dos Materiais no Departamento de Engenharia Metalúrgica, de Materiais e de Minas - UFMG (2019). 

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Published

2023-10-25

How to Cite

Torres, A. de J. ., Brasil, M. J. R. ., Aguiar, M. B. de ., Barbosa, M. T., Santos, W. J. dos ., & Garcia, D. C. S. . (2023). Microstructure of cement paste with sugarcane bagasse ash under autoclave treatment. ENCONTRO NACIONAL DE APROVEITAMENTO DE RESÍDUOS NA CONSTRUÇÃO, 8(00), 1–6. https://doi.org/10.46421/enarc.v8i00.3030

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