Physical characteristics improvement of recycled concrete powder by mechanoactivation with and without grinding aid

Authors

Keywords:

Chemical additives, Grindability index, Milling, Supplementary cementitious materials

Abstract

This study aimed to evaluate the effect of mechanoactivation with and without grinding aids (GAs) on the physical characteristics of recycled concrete powder (RCP) for use as supplementary cementitious material (MCS). RCP was subjected to the comminution process in a planetary ball mill for 30, 60, 120, 180, and 240 minutes, using three types of grinding aids (propylene glycol (PG), sodium hexametaphosphate (SHMP) and triethanolamine (TEA)), at different levels (0, 0.05, 0.1, 0.5 and 1%). The powders' performance as SCM (10% substitution) was evaluated in pastes on consistency and compressive strength at 7 days. Considering the shortest milling time and the lowest content of milling aid, mechanoactivation for 30 minutes with 0.5% propylene glycol (PG) additive reduced the d50 from 20.99 to 8.85 µm and increased the BET from 6.23 to 7.50 m²/g, without altering crystallinity. The results in pastes indicated that the use of grinding aids favored the use of recycled concrete powder as MSC, with a statistically significant score in particularity resistance.

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Author Biographies

Melissa, Federal Institute of Paraná (IFPR)

aster in Civil Engineering from the Postgraduate Program in Civil Engineering (PPGECI) at the Federal University of Latin American Integration in the Materials and Eco-efficiency research line. Postgraduate student in Occupational Safety Engineering (Expected Completion in July 2024) and Postgraduate Student in BIM and Projects Applied to Civil Construction (Expected Completion in January 2024). Graduated in Civil Engineering from Centro Universitário Dinâmica das Cataratas (2021), Technician in buildings from Federal Institute of Paraná (2014). Works as a laboratory technician - Area: Buildings at the Campus Foz do Iguaçu of the Federal Institute of Paraná.

Mrs, University of Latin American Integration (UNILA)

Post-Doctoral Fellow of the Postgraduate Program in Civil Engineering at the Federal University of Latin American Integration (UNILA). PhD in Civil Engineering (2022) from the Federal University of Paraná (UFPR) and Master's degree (2016) from the same university. Occupational Safety Engineer (2021) and MBA Specialist in Project Management (2020) from Centro Universitário Dinâmica das Cataratas (UDC). Specialist in Assessments and Expertise (2023) from the IDD Institute. Graduated in Civil Engineering UFPR (2013). She is a Professor at Centro Universitário Dinâmica das Cataratas (UDC) in the Undergraduate courses in Civil Engineering and Postgraduate MBA Management and Execution of Works and Engineering Services and MBA in Interior Architecture and Lighting Design. She was coordinator of the undergraduate course in Civil Engineering at Faculdade Educacional de Medianeira (UDC Medianeira) from 2019 to 2023. She works in the areas of civil construction, lean construction, logistics at construction sites, construction management and management, work safety, pathology construction, construction materials and the environment. She has experience in the area of Engineering, with an emphasis on durability, particle packaging, CO2 emissions and capture, use of solid waste, construction sustainability, circular economy and eco-efficiency.

Mrs, University of Latin American Integration (UNILA)

He has a degree in Chemical Engineering from the State University of Western Paraná (1999), a master's degree in Chemical Engineering from the Federal University of Santa Catarina (2002), a doctorate in Chemical Engineering from the Federal University of Santa Catarina (2009) and a specialization in Security Engineering from I work at the Federal Technological University of Paraná - Cornélio Procópio Campus (2013). She is an associate professor at the Federal University of Latin American Integration (Unila). She is coordinator of the Chemical Engineering course (since December 2019) and permanent member of the Interdisciplinary Postgraduate Program in Energy and Sustainability (since 2019). She works with topics related to Engineering Education, Environmental Education, Gamification, Integrated Management System, Preventive Environmental Strategies, Optimization of Water Use, Water Treatment, Effluent Treatment and Reuse.

Mrs, University of Latin American Integration (UNILA)

PhD in Civil Engineering (2010) from the Federal University of Rio Grande do Sul (UFRGS), with a master's degree (2004) from the same university. Graduated in Civil Engineering (2003) from the State University of Western Paraná (UNIOESTE). Associate Professor Level 4 at the Federal University of Latin American Integration (UNILA) and coordinator of LADEMA (Performance, Structures and Materials Laboratory). Director of the Interdisciplinary Center for Technology and Infrastructure (ILATIT-UNILA) from 2013 to 2015 and Coordinator of the Postgraduate Program in Civil Engineering (PPGECI) from 03/2020 to 02/2024. Researcher at CEASB/PTI (Center for Advanced Studies in Dam Safety/Itaipu Technological Park), from 2009 to 2021. Professor in the Postgraduate Program in Environmental Technologies at the Federal Technological University of Paraná (UTFPR) from 2012 to 2020. He is a founding member of the Latin American Association of Construction Pathology (ALCONPAT Brasil). Member of the National Association of Built Environment Technology (ANTAC), the Brazilian Concrete Institute (IBRACON), the Latin American Association of Calidad Control, Pathology and Recovery of Construction (ALCONPAT International). She is a member of the technical committee of ABNT-CE 18: 300.06-Concrete Durability Study Commission, since 2009. Advisor to CREA-PR (2020 to 2025). Director of interinstitutional relations (2018-2020) and Vice President of ANTAC (2020-2022). Associate editor of RIEM Magazine (2020-current), Co-Editor in Chief of Alconpat magazine (2021-2023), Member of the editorial board of the Journal of Building Pathology and Rehabilitation (2021-current) and Case Studies in Construction Materials (2023 - current). Evaluator of journals such as Materials Research, Construction and building materials, Journal of cleaning production, Neural Computing and Applications, Cement and concrete composites, Journal of Building Engineering, among others. She has received several awards, including Ambassador of the Iguaçu Iguassu Convention, Outstanding Young Investigator at Productivo-ALCONPAT Internacional and Educator of the Year-CREAPR. She works in the area of construction pathology, construction materials and the environment. She has experience in the area of Engineering, with an emphasis on durability, probabilistic and deterministic useful life prediction, CO2 emissions and capture, use of solid waste, construction sustainability, circular economy and eco-efficiency (SDG 11 and 12). She also works on the topic of women in science (SDG 5).

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Published

2025-03-13

How to Cite

RISSON, K. D. B. de S.; PROENÇA, M. P.; OLIVEIRA, D. R. B.; ZARA, K. R. . de F.; POSSAN, E. Physical characteristics improvement of recycled concrete powder by mechanoactivation with and without grinding aid. Ambiente Construído, [S. l.], v. 25, 2025. Disponível em: https://seer.ufrgs.br/index.php/ambienteconstruido/article/view/139436. Acesso em: 25 jun. 2025.

Issue

Vol. 25 (2025): Edições Especiais & Artigos

Section

Edição especial: os melhores artigos do ENARC 2023

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