Innovation in construction: mortars with delayed setting times

Authors

DOI:

https://doi.org/10.5902/2179460X92196

Keywords:

Mortar, Iron nanoparticles, Setting time of cement paste

Abstract

The mortar an essential material in masonry and finishing works has its workability defined by its initial and final setting times, which govern its internal cohesion and application window. Factors such as the watertocement ratio, curing temperature, and admixtures directly influence these parameters, with traditional retarders proving effective in tropical climates. Studies have shown that adding iron nanoparticles can extend the setting intervals by modifying the hydration kinetics while preserving the structural characteristics of the cementitious matrix. This research systematically investigates the incorporation of FeNPs into mortars, using standardized tests to quantify changes in setting times and to correlate the presence of the nanomaterial with the hardening phases and composite stability. The results indicated that adding iron nanoparticles broadens the workability window compared to the conventional mix without admixtures, highlighting the potential of these particles as setting retarders under tropical climatic conditions. 

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Author Biographies

Matheus Amancio Correa Neres, Universidade Federal de Santa Maria

Undergraduate student in Mechanical Engineering - Universidade Federal de Santa Maria (UFSM).

Marcus Paulo de Oliveira, Universidade Federal de Santa Maria

He has a high school diploma from the Federal Institute of Education, Science and Technology of Northern Minas Gerais (2019). He is currently studying Mechanical Engineering at Universidade Federal de Santa Maria (UFSM).

Larissa Friedrich, Universidade Federal de Santa Maria

Undergraduate in Agricultural Engineering at Universidade Federal de Santa Maria (UFSM).

Luísa Dias Lopes, Universidade Federal de Santa Maria

Undergraduate student in Electrical Engineering at Universidade Federal de Santa Maria (UFSM).

Patrícia Regina Ebani, Universidade Federal de Santa Maria

Graduated in Chemistry from the Federal University of Santa Maria (UFSM) in 2013 with an emphasis on the area of ​​formation of metallic nanoparticles coated by block copolymers and catalysis activity. Master in Inorganic Chemistry (2016) from the same institution with research developed in the area of ​​metal complexes, antioxidant activity and crystallography. In 2021, she completed her doctorate in Physical Chemistry at the Polymer Spectroscopy Laboratory (LEPOL - UFSM).

Glauber Rodrigues de Quadros, Universidade Federal de Santa Maria

He holds a bachelor's degree in Mathematics from the Federal University of Santa Maria (2009), a master's and doctorate from the Federal University of Rio Grande do Sul (2012 and 2015). He is currently a professor at UFSM in Cachoeira do Sul

Jocenir Boita, Universidade Federal de Santa Maria

He holds a degree in Physics from the Regional Community University of Chapecó (2007), a Master's degree in Physics from the Federal University of Rio Grande do Sul (2010), with an emphasis on the formation of metallic nanoparticles, and a PhD in Physics with an emphasis on Experimental Physics focused on the formation of monometallic and bimetallic systems involving transition metals, their reactivity to sulfur poisoning, and the construction of specific instrumentation for in situ X-ray absorption with temporal resolution, from the Federal University of Rio Grande do Sul - UFRGS.

Lucas Alves Lamberti, Universidade Federal de Santa Maria

He holds a degree in Civil Engineering (2013), a master's degree (2015) and a doctorate (2019) in Civil Engineering from the Federal University of Santa Maria. He is currently an adjunct professor at the Federal University of Santa Maria - Cachoeira do Sul Campus. He works in areas of civil construction, mainly topics such as: permeable pavements, concrete technology, and mortar performance.

Maria Cecília Caldeira Vieira, Universidade Federal de Santa Maria

Electrical Engineering student at the Federal University of Santa Maria (UFSM) - Cachoeira do Sul Campus. He studied Computer Science at the Federal Institute of Science and Technology of Northern Minas Gerais (IFNMG). He is currently a scientific initiation scholarship holder entitled: Nanotechnology Applied to New Materials: Electronic and Structural Properties of Advanced Materials.

Arthur Batista Bromirsky, Universidade Federal de Santa Maria

He has a high school diploma from Colégio Totem Cachoeira do Sul (2021). He has experience in the area of ​​Mechanical Engineering.

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Published

2025-11-19

Issue

Vol. 47 No. esp. 4 (2025): III Feira de Ciências, Tecnologia e Inovação da UFSM-CS

Section

III Feira de Ciências, Tecnologia e Inovação da UFSM-CS

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