Título:	Interaction of commercial superplastificant additives with pozolanic cements containing calcined clay
Autor(es):	Teixeira, Amanda Rosa Brito, Gabriel Ferreira da Silva Paula, Andreia de Machado, Fabricio Rêgo, João Henrique da Silva
Afiliação do autor:	University of Brasília, Department of Civil and Environmental Engineering University of Brasília, Institute of Chemistry University of Brasília, Department of Civil and Environmental Engineering University of Brasília, Institute of Chemistry University of Brasília, Department of Civil and Environmental Engineering
Assunto:	Aditivos superplastificantes Policarboxilato Cimento Argila
Data de publicação:	Dez-2023
Editora:	IJAET
Referência:	TEIXEIRA, Amanda Rosa et al. Interaction of commercial superplastificant additives with pozolanic cements containing calcined clay. International Journal of Advances in Engineering & Technology, [S. l.], v. 16, n. 6, p. 659-672, dez. 2023. Disponível em: https://www.ijaet.org/media/15I78-IJAET1606329_v16_i6_pp659-672.pdf. Acesso em: 20 jun. 2024.
Abstract:	The utilization of polycarboxylate-based superplasticizer additives (PCE) in the concrete industry is widespread, and therefore, the dispersion mechanisms of these additives in cements containing supplementary cementitious materials (SCMs) present significant opportunities for investigation. This article aims to characterize the interaction between three commercial PCEs and three types of cement (pure Portland cement CPV-ARI and cement formulations containing 20 wt% and 28 wt% calcined clay content). The cement and calcined clay underwent physical-chemical characterization, whereas the PCEs were characterized through solid content determination and FTIR analysis. The interaction between cement, SCMs and additive was assessed by determining the optimal additive dosage using the mini-slump test, which was employed to evaluate its influence on kinetic mechanisms and hydration using a semi-adiabatic calorimeter, as well as mechanical strength. The PCEs exhibited high sensitivity to calcined clay, requiring higher dosages of PCEs to achieve the same fluidity compared to the system without clay.
Unidade Acadêmica:	Faculdade de Tecnologia (FT) Departamento de Engenharia Civil e Ambiental (FT ENC) Instituto de Química (IQ)
Licença:	International Journal of Advances in Engineering & Technology (CC BY) This work is licensed under a Creative Commons Attribution 3.0 Unported License. Fonte: https://www.ijaet.org/volume-16-issue-6.html. Acesso em: 21 jun. 2024.
DOI:	10.5281/zenodo.10518192
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