Study of the influence of the mortar fine recycled aggregate ratio and the mixing sequence on the behavior of new mortars

Authors

  • Gilberto Alves da Silva Neto Civil Engineer (UEFS), Feira de Santana - BA, Phone number 55 75 36258549
  • Mônica Batista Leite Civil Engineer, Dr. in Civil Engineering (UFRGS), Associate Professor, Civil and Environmental Engineering Postgraduate Program (PPGECEA), State University of Feira de Santana (UEFS), Av. Transnordestina, s/n, Novo Horizonte, 44036-900, Feira de Santana - BA, Phone number 55 75 32248117, Fax number 55 75 32248117 http://orcid.org/0000-0002-1212-0873

Keywords:

Recycled Mortar, Mixing Sequence, Mortar Fine Recycled Aggregate

Abstract

The objective of this study was to investigate the behavior of mortars by replacing a natural fine aggregate (NFA) with mortar fine recycled aggregate (MFRA), with dimensions of less than 2.4mm. In addition, the influence of the  mixing sequence over the performance of these mortars was analyzed. For this purpose, the replacement contents, by weight, of 20% and 40%, and two mixing sequences were adopted: the sequence of the Brazilian Standard, NBR 7215 (ABNT, 1996) and an adaptation for mortars (MDE, in Portuguese, Mistura em Duas Etapas) of the Two-Stage Mixing Approach (TSMA), proposed by Tam, Gao and Tam (2005) for recycled concrete. The mortars were produced with cement CPV-ARI, using a mixing proportion of 1.0:5.0 (cement:aggregate, by weight) and a constant water/cement rate of 0.88. To analyze the behavior of the recycled mortars, they were tested in the fresh state and in the hardened state. The study concluded that the partial replacement of the NFA with the MFRA improved some properties of the recycled mortars: the air entrained content and the water absorption rate by capillarity decreased, and the mechanical performance increased. Regarding the influence of the mixing sequence, the adoption of the MDE promoted a better behavior on the mortar properties evaluated.

Downloads

Download data is not yet available.

Downloads

Published

2018-06-06

How to Cite

SILVA NETO, G. A. da; LEITE, M. B. Study of the influence of the mortar fine recycled aggregate ratio and the mixing sequence on the behavior of new mortars. Ambiente Construído, [S. l.], v. 18, n. 2, p. 53–69, 2018. Disponível em: https://seer.ufrgs.br/index.php/ambienteconstruido/article/view/72668. Acesso em: 10 may. 2025.

Issue

Vol. 18 No. 2 (2018): Edição especial sobre Tecnologia das Argamassas

Section

Mortar Technology

License

Authors who publish in Ambiente Construído agree to the terms:

- The authors grant the Journal the right to publish under the Creative Commons Attribution License (CC BY 4.0), allowing access, printing, reading, distribution, adaptation, and development of other research, if the authorship is recognized.

- Authors are authorized to distribute the work published in the Journal, such as institutional repositories, or to include their article as part of the thesis and/or dissertation, as long as they mention the publication reference in Ambiente Construído.

- Anyone can read, distribute, print, download, and indicate the address of the complete article without prior authorization from the Journal respecting the CC BY 4.0 license.

Creative Commons Attribution License

ISSN 1678-8621

Most read articles by the same author(s)