Lais Alves, Nordine Leklou, Fábio de Simone E Souza, Silvio de Barros
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Effects of Thermal Activation on Mechanical Performance and Sustainability of Slag-Based Geopolymers.
Ground granulated blast furnace slag (GBFS)-based geopolymers represent a viable binder system that combines mechanical efficiency with a significantly lower carbon footprint when compared to conventional Portland cement. This work examines how thermal curing between 20 °C and 80 °C affects setting time, mechanical performance, shrinkage, and porosity of GBFS-based geopolymers. Curing at 40 °C accelerated gel formation, yielding compressive strengths up to 71.9 MPa. This regime also reduced shrinkage and porosity. In contrast, curing at ≥60 °C caused structural degradation and reduced long-term performance. Statistical analysis (ANOVA and Tukey post hoc) confirmed significant effects of curing regime and age on performance. These findings provide key insights for optimizing thermal curing of slag-based geopolymers, supporting their deployment in environmentally responsible construction practices.
期刊介绍：
Materials (ISSN 1996-1944) is an open access journal of related scientific research and technology development. It publishes reviews, regular research papers (articles) and short communications. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. Therefore, there is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced. Materials provides a forum for publishing papers which advance the in-depth understanding of the relationship between the structure, the properties or the functions of all kinds of materials. Chemical syntheses, chemical structures and mechanical, chemical, electronic, magnetic and optical properties and various applications will be considered.
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