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Nano-silica in Holcim general use cement mortars: A comparative study with traditional and prefabricated mortars

  • Mohammadfarid Alvansazyazdi (Institute of Science and Concrete Technology, ICITECH, Universitat Politecnica de Valencia) ;
  • Jorge Figueroa (Faculty of Engineering and Applied Sciences, School of Civil Engineering, Central University of Ecuador) ;
  • Alex Paucar (Faculty of Engineering and Applied Sciences, School of Civil Engineering, Central University of Ecuador) ;
  • Gilson Robles (Faculty of Engineering and Applied Sciences, School of Civil Engineering, Central University of Ecuador) ;
  • Majid Khorami (Faculty of Architecture and Urban Planning, University of UTE) ;
  • Pablo M. Bonilla-Valladares (Faculty of Chemical Sciences, Central University of Ecuador) ;
  • Alexis Debut (Department of Life Sciences and Agriculture, Center for Nanoscience and Nanotechnology, University of the Armed Forces ESPE) ;
  • Mahdi Feizbahr (School of Civil Engineering, Engineering Campus, University Sains Malaysia)
  • Received : 2023.09.30
  • Accepted : 2024.04.17
  • Published : 2024.03.25

Abstract

Nano-silica's growing use in construction, known for enhancing strength and durability by reducing porosity, drives this research's significance, especially considering Ecuador's reliance on cement in construction. A comprehensive comparative study on mortars made with General Use cement and aggregates from Pifo and San Antonio quarries has been studied. It explores the impact of incorporating nano-silica in varying proportions (0.75%, 1.00%, 1.25%) on mortar properties, contrasting them with conventional and prefabricated mortars. laboratory Testing is conducted according to standards to assess both fresh and hardened state properties, and microscopic analysis reveals the optimal nano-silica proportion's effects on mortar characteristics. Results shows that Incorporating 0.75% nano-silica resulted in a 61% increase in compressive strength at 7 days and. For a nanosilica content of 1.25%, a 14% increase in compressive strength was observed at 28 days in relation to the conventional mortar and the permeability of the mortar decreased by 30% when adding 0.75% nanosilica. It discusses economic viability and provides insights through SEM and EDS analyses. Overall, it underscores nano-silica's potential to enhance mortar properties and its relevance in creating more efficient and durable construction materials.

Keywords

Acknowledgement

We would like to express our gratitude to Dr. Alexis Debut from the Center for Nanoscience and Nanotechnology, Armed Forces University ESPE, for his support, as well as to the laboratory staff. We would also like to thank the personnel of INECYC and the material testing laboratory at the Central University of Ecuador.

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