Investigation of the Effect of Nano-Silica on the Compressive and Flexural Strength of Cement Mortar Reinforced with Polypropylene Fibers

Mortar is suitable for utilizing in compressed parts such as columns and arches due to its considerable compressive strength. However, despite this advantage, the relatively low tensile strength and brittleness of the mortar limit its use for components that are under tensile loads. Using fibers and...

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Autores principales:	meisam fazlavi, hosein mehdikhani, saeed maadani
Formato:	article
Lenguaje:	FA
Publicado:	Iranian Society of Structrual Engineering (ISSE) 2020
Materias:	fiber reinforced mortar nanomaterials silica nanoparticles compressive strength flextural strength Bridge engineering TG1-470 Building construction TH1-9745
Acceso en línea:	https://doaj.org/article/07364f44786d4e96b90cd2c40fb6e344
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spelling	oai:doaj.org-article:07364f44786d4e96b90cd2c40fb6e3442021-11-08T15:53:20ZInvestigation of the Effect of Nano-Silica on the Compressive and Flexural Strength of Cement Mortar Reinforced with Polypropylene Fibers2476-39772538-261610.22065/jsce.2018.122286.1499https://doaj.org/article/07364f44786d4e96b90cd2c40fb6e3442020-09-01T00:00:00Zhttps://www.jsce.ir/article_70570_4f0c45683819cb72a9965d25d7ec84b5.pdfhttps://doaj.org/toc/2476-3977https://doaj.org/toc/2538-2616Mortar is suitable for utilizing in compressed parts such as columns and arches due to its considerable compressive strength. However, despite this advantage, the relatively low tensile strength and brittleness of the mortar limit its use for components that are under tensile loads. Using fibers and nano-particles can be a way to reduce these problems. In this research work, various fiber reinforced and nano-engineered cement mortars have been successfully prepared through the addition of nanosilica into plain and fiber reinforced mortars. In this way, effects of nano-SiO2 on the mechanical properties of cement mortars with polypropylene fibers and also without it have been evaluated. Polypropylene fibers were used in lengths of 6-18 mm and aspect ratios of 300-900. The effect of fibers in two different percentages of 0.1% and 0.2%, and the influence of nano-silica in various percentages of 1, 2, 3, 4 and 5% on mortars with a water-to-binder weight ratio of 0.485 were evaluated and compared. A total of 108 cubic mortar samples with a dimension of 5×5×5 cm3 and 108 rectangular cubic samples with a dimension of 16×4×4 cm3 were made according to ASTM standards, and compressive and flexural strength tests were carried out on samples at the ages of 7 and 28 days. The results of the experiments indicated a significant enhancement in the mechanical properties of the prepared mortars, as the values of 7-day and 28-day compressive strength of the sample containing 0.1% fiber and 3% nano-SiO2 were increased by 51% and 61%, respectively, compared to the control sample. Besides, the values of 7-day and 28-day flexural strength of the sample containing 0.2% fiber and 3% nano-SiO2 were increased by 48% and 55%, respectively, compared to the control sample. A noticeable increase in mechanical properties indicated the suitable performance of this type of mortar.meisam fazlavihosein mehdikhanisaeed maadaniIranian Society of Structrual Engineering (ISSE)articlefiber reinforced mortarnanomaterialssilica nanoparticlescompressive strengthflextural strengthBridge engineeringTG1-470Building constructionTH1-9745FAJournal of Structural and Construction Engineering, Vol 7, Iss 3, Pp 73-91 (2020)
institution	DOAJ
collection	DOAJ
language	FA
topic	fiber reinforced mortar nanomaterials silica nanoparticles compressive strength flextural strength Bridge engineering TG1-470 Building construction TH1-9745
spellingShingle	fiber reinforced mortar nanomaterials silica nanoparticles compressive strength flextural strength Bridge engineering TG1-470 Building construction TH1-9745 meisam fazlavi hosein mehdikhani saeed maadani Investigation of the Effect of Nano-Silica on the Compressive and Flexural Strength of Cement Mortar Reinforced with Polypropylene Fibers
description	Mortar is suitable for utilizing in compressed parts such as columns and arches due to its considerable compressive strength. However, despite this advantage, the relatively low tensile strength and brittleness of the mortar limit its use for components that are under tensile loads. Using fibers and nano-particles can be a way to reduce these problems. In this research work, various fiber reinforced and nano-engineered cement mortars have been successfully prepared through the addition of nanosilica into plain and fiber reinforced mortars. In this way, effects of nano-SiO2 on the mechanical properties of cement mortars with polypropylene fibers and also without it have been evaluated. Polypropylene fibers were used in lengths of 6-18 mm and aspect ratios of 300-900. The effect of fibers in two different percentages of 0.1% and 0.2%, and the influence of nano-silica in various percentages of 1, 2, 3, 4 and 5% on mortars with a water-to-binder weight ratio of 0.485 were evaluated and compared. A total of 108 cubic mortar samples with a dimension of 5×5×5 cm3 and 108 rectangular cubic samples with a dimension of 16×4×4 cm3 were made according to ASTM standards, and compressive and flexural strength tests were carried out on samples at the ages of 7 and 28 days. The results of the experiments indicated a significant enhancement in the mechanical properties of the prepared mortars, as the values of 7-day and 28-day compressive strength of the sample containing 0.1% fiber and 3% nano-SiO2 were increased by 51% and 61%, respectively, compared to the control sample. Besides, the values of 7-day and 28-day flexural strength of the sample containing 0.2% fiber and 3% nano-SiO2 were increased by 48% and 55%, respectively, compared to the control sample. A noticeable increase in mechanical properties indicated the suitable performance of this type of mortar.
format	article
author	meisam fazlavi hosein mehdikhani saeed maadani
author_facet	meisam fazlavi hosein mehdikhani saeed maadani
author_sort	meisam fazlavi
title	Investigation of the Effect of Nano-Silica on the Compressive and Flexural Strength of Cement Mortar Reinforced with Polypropylene Fibers
title_short	Investigation of the Effect of Nano-Silica on the Compressive and Flexural Strength of Cement Mortar Reinforced with Polypropylene Fibers
title_full	Investigation of the Effect of Nano-Silica on the Compressive and Flexural Strength of Cement Mortar Reinforced with Polypropylene Fibers
title_fullStr	Investigation of the Effect of Nano-Silica on the Compressive and Flexural Strength of Cement Mortar Reinforced with Polypropylene Fibers
title_full_unstemmed	Investigation of the Effect of Nano-Silica on the Compressive and Flexural Strength of Cement Mortar Reinforced with Polypropylene Fibers
title_sort	investigation of the effect of nano-silica on the compressive and flexural strength of cement mortar reinforced with polypropylene fibers
publisher	Iranian Society of Structrual Engineering (ISSE)
publishDate	2020
url	https://doaj.org/article/07364f44786d4e96b90cd2c40fb6e344
work_keys_str_mv	AT meisamfazlavi investigationoftheeffectofnanosilicaonthecompressiveandflexuralstrengthofcementmortarreinforcedwithpolypropylenefibers AT hoseinmehdikhani investigationoftheeffectofnanosilicaonthecompressiveandflexuralstrengthofcementmortarreinforcedwithpolypropylenefibers AT saeedmaadani investigationoftheeffectofnanosilicaonthecompressiveandflexuralstrengthofcementmortarreinforcedwithpolypropylenefibers
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Investigation of the Effect of Nano-Silica on the Compressive and Flexural Strength of Cement Mortar Reinforced with Polypropylene Fibers

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