Use of asbestos-cement waste (ACW) in the production of Portland clinker and assessment of the hydration process

Authors

DOI:

https://doi.org/10.46421/enarc.v8i00.2996

Keywords:

Asbestos-cement waste (ACW), Portland clinker, Hydration, Mechanical Performance

Abstract

In this study, the incorporation of different levels of asbestos-cement waste (ACW) was evaluated (24%, 49%, 74%, and 86% by weight, corresponding to 1.65%, 2.28%, 2.91%, and 3.54% SO3 content, respectively) as a replacement for the limestone and clay mixture in Portland clinker meal, and its effects on the clinkering process at different temperatures (1300°C and 1350°C, 1400°C and 1450°C) were examined. The phases formed in the produced clinkers were identified using X-ray diffraction (XRD), and the clinkers were then ground to produce cement. Subsequently, hydration analysis and mechanical performance tests were conducted on the cement pastes. Thus, it was observed that ACW can act as a mineralizer at a lower temperature (1350°C) of clinkerization, possibly providing an increase in the alite content (C3S) in the clinkers, due to the presence of SO3 and providing a greater amount of phases hydrated and greater mechanical strength at early ages.

Author Biographies

Tiago Assunção Santos, Universidade Estadual de Feira de Santana

Doutor em Energia e Ambiente (2021) pela Universidade Federal da Bahia (UFBA). Atualmente é Professor Visitante da Universidade Estadual de Feira de Santana (UEFS) e Docente Permanente do Programa de Pós Graduação em Engenharia Civil e Ambiental (PPGECA/UEFS).

Marcelo Strozi Cilla, Universidade Federal da Bahia

Professor da Universidade Federal da Bahia, Docente Permanente do Programa de Pós-Graduação em Engenharia Civil (PPEC/UFBA) e colaborador do Centro Interdisciplinar de Energia e Meio Ambiente (CIEnAm/UFBA). Doutorado (2015) em Ciência e Engenharia de Materiais pela Universidade Federal de São Carlos e em Engenharia Industrial pela Università degli Studi di Padova, na Itália. Possui, ainda, pós-doutorado CAPES-PNPD na Universidade Federal de Campina Grande (2016).

Daniel Véras Ribeiro, Universidade Federal da Bahia

Doutorado (2010) e pós-doutorado (2011) em Ciência e Engenharia de Materiais pela Universidade Federal de São Carlos. Desenvolveu, ainda, estágio de pós-graduação na Universidade de Aveiro, no Instituto Superior Técnico de Viana do Castelo e no Laboratório Nacional de Engenharia Civil (LNEC), ambos em Portugal. Atualmente é Professor Associado II da Universidade Federal da Bahia, Docente Permanente do Programa de Pós Graduação em Engenharia Civil (PPEC/UFBA). É Diretor Regional da ALCONPAT Brasil e do IBRACON. 

References

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Published

2023-10-25

How to Cite

Santos, T. A., Cilla, M. S. ., & Ribeiro, D. V. (2023). Use of asbestos-cement waste (ACW) in the production of Portland clinker and assessment of the hydration process. ENCONTRO NACIONAL DE APROVEITAMENTO DE RESÍDUOS NA CONSTRUÇÃO, 8(00), 1–6. https://doi.org/10.46421/enarc.v8i00.2996

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