Influence of polypropylene microfibre (PPMF) dispersion procedure on fresh and hardened rendering mortar properties

This study was carried out to evaluate the influence of a polypropylene microfibre (PPMF) dispersion procedure on fresh and hardened state properties of rendering mortars. Specimens prepared with two different PPMF dispersion procedures were evaluated comparatively with reference specimens prepared...

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Hoofdauteurs:	Dantas, Sérgio Roberto Andrade, Serafini, Ramoel, Romano, Roberto Cesar de Oliveira, Vittorino, Fúlvio, Loh, Kai
Formaat:	Online
Taal:	eng
Gepubliceerd in:	ANTAC - Associação Nacional de Tecnologia do Ambiente Construído 2020
Online toegang:	https://seer.ufrgs.br/ambienteconstruido/article/view/90644
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id	ojs-article-90644
record_format	ojs
spelling	ojs-article-906442020-05-09T13:01:22Z Influence of polypropylene microfibre (PPMF) dispersion procedure on fresh and hardened rendering mortar properties Dantas, Sérgio Roberto Andrade Serafini, Ramoel Romano, Roberto Cesar de Oliveira Vittorino, Fúlvio Loh, Kai Engenharia Civil; Fachadas de edifícios; Argamassas de revestimento; Microfibra de Polipropileno; Retração de secagem; Processo de dispersão This study was carried out to evaluate the influence of a polypropylene microfibre (PPMF) dispersion procedure on fresh and hardened state properties of rendering mortars. Specimens prepared with two different PPMF dispersion procedures were evaluated comparatively with reference specimens prepared without adding PPMF. Changes in the fresh properties were monitored using flow table, squeeze flow, and air-entrainment tests. The hardened state was characterized by capillary water absorption, air-permeability, dynamic elastic modulus (E), tensile strength according to the Brazilian test, and porosity by the Archimedes immersion method. Results show that the fresh mortar properties were not affected by dispersion procedure and all hardened mortar properties were statistically similar, except for the dimensional variation of the specimens. The study also shows that adding polypropylene microfibres in a dispersed form was more effective in terms of controlling total drying shrinkage than directly adding fibres to the cementitious matrix (as recommended by the manufacturer) or the reference mortar. ANTAC - Associação Nacional de Tecnologia do Ambiente Construído Laboratory of Microstructure and Material Eco-efficiency – LME, Institute of Technological Research (IPT) and its foundation (FIPT), CAPES, FAPESP, Votorantim Cimentos SA, Neo-Matex, Ibratin Industria e Comércio Ltda. 2020-05-08 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion https://seer.ufrgs.br/ambienteconstruido/article/view/90644 Ambiente Construído; v. 20, n. 2 (2020); 7-23 Ambiente Construído; v. 20, n. 2 (2020); 7-23 Ambiente Construído; v. 20, n. 2 (2020); 7-23 1678-8621 1415-8876 eng https://seer.ufrgs.br/ambienteconstruido/article/view/90644/56939 Direitos autorais 2020 Ambiente Construído https://creativecommons.org/licenses/by/4.0
institution	Universidade Federal do Rio Grande do Sul
collection	OJS
language	eng
format	Online
author	Dantas, Sérgio Roberto Andrade Serafini, Ramoel Romano, Roberto Cesar de Oliveira Vittorino, Fúlvio Loh, Kai
spellingShingle	Dantas, Sérgio Roberto Andrade Serafini, Ramoel Romano, Roberto Cesar de Oliveira Vittorino, Fúlvio Loh, Kai Influence of polypropylene microfibre (PPMF) dispersion procedure on fresh and hardened rendering mortar properties
author_facet	Dantas, Sérgio Roberto Andrade Serafini, Ramoel Romano, Roberto Cesar de Oliveira Vittorino, Fúlvio Loh, Kai
author_sort	Dantas, Sérgio Roberto Andrade
title	Influence of polypropylene microfibre (PPMF) dispersion procedure on fresh and hardened rendering mortar properties
title_short	Influence of polypropylene microfibre (PPMF) dispersion procedure on fresh and hardened rendering mortar properties
title_full	Influence of polypropylene microfibre (PPMF) dispersion procedure on fresh and hardened rendering mortar properties
title_fullStr	Influence of polypropylene microfibre (PPMF) dispersion procedure on fresh and hardened rendering mortar properties
title_full_unstemmed	Influence of polypropylene microfibre (PPMF) dispersion procedure on fresh and hardened rendering mortar properties
title_sort	influence of polypropylene microfibre (ppmf) dispersion procedure on fresh and hardened rendering mortar properties
description	This study was carried out to evaluate the influence of a polypropylene microfibre (PPMF) dispersion procedure on fresh and hardened state properties of rendering mortars. Specimens prepared with two different PPMF dispersion procedures were evaluated comparatively with reference specimens prepared without adding PPMF. Changes in the fresh properties were monitored using flow table, squeeze flow, and air-entrainment tests. The hardened state was characterized by capillary water absorption, air-permeability, dynamic elastic modulus (E), tensile strength according to the Brazilian test, and porosity by the Archimedes immersion method. Results show that the fresh mortar properties were not affected by dispersion procedure and all hardened mortar properties were statistically similar, except for the dimensional variation of the specimens. The study also shows that adding polypropylene microfibres in a dispersed form was more effective in terms of controlling total drying shrinkage than directly adding fibres to the cementitious matrix (as recommended by the manufacturer) or the reference mortar.
publisher	ANTAC - Associação Nacional de Tecnologia do Ambiente Construído
publishDate	2020
url	https://seer.ufrgs.br/ambienteconstruido/article/view/90644
work_keys_str_mv	AT dantassergiorobertoandrade influenceofpolypropylenemicrofibreppmfdispersionprocedureonfreshandhardenedrenderingmortarproperties AT serafiniramoel influenceofpolypropylenemicrofibreppmfdispersionprocedureonfreshandhardenedrenderingmortarproperties AT romanorobertocesardeoliveira influenceofpolypropylenemicrofibreppmfdispersionprocedureonfreshandhardenedrenderingmortarproperties AT vittorinofulvio influenceofpolypropylenemicrofibreppmfdispersionprocedureonfreshandhardenedrenderingmortarproperties AT lohkai influenceofpolypropylenemicrofibreppmfdispersionprocedureonfreshandhardenedrenderingmortarproperties
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Influence of polypropylene microfibre (PPMF) dispersion procedure on fresh and hardened rendering mortar properties

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