Correlation between modulus of elasticity dynamic and mechanical strengths of cement mortars and sand with lime addition

The quality and the durability of a mortar covering are directly related its capacity to absorb deformations, which are measured by the modulus of elasticity (Young’s modulus). This work investigated the influence of the cement, lime, and sand on the mechanical strengths and modulus of elasticity...

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Principais autores:	Silva, Narciso Gonçalves da, Campiteli, Vicente Coney
Formato:	Online
Idioma:	por
Publicado em:	ANTAC - Associação Nacional de Tecnologia do Ambiente Construído 2008
Acesso em linha:	https://seer.ufrgs.br/ambienteconstruido/article/view/6386
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id	ojs-article-6386
record_format	ojs
spelling	ojs-article-63862009-03-07T00:35:54Z Correlation between modulus of elasticity dynamic and mechanical strengths of cement mortars and sand with lime addition Correlação entre módulo de elasticidade dinâmico e resistências mecânicas de argamassas de cimento, cal e areia Silva, Narciso Gonçalves da Campiteli, Vicente Coney Modulus of elasticity; Deformation. Mortar; Covering módulo de elasticidade; deformação; argamassa; revestimento The quality and the durability of a mortar covering are directly related its capacity to absorb deformations, which are measured by the modulus of elasticity (Young’s modulus). This work investigated the influence of the cement, lime, and sand on the mechanical strengths and modulus of elasticity of rendering mortars, the latter calculated by the dynamic method using the PUNDIT. The effects of a natural and artificial (crushed rock) sand were also evaluated. Cement CP II Z 32 and ground lime were used to prepare 18 mortars (9 with natural sand and 9 with crushed rock sand). Cylindrical 5 cm x10 cm and prismatic 4 cm x4 cm x16 cm specimens were cast for the tests. Masonry panels 80 cm x100 cm were built and covered by a 2cm thick layer of each mortar for pull-out tests and cracks observations. The results showed that the mortars with crushed rock sand have higher modulus of elasticity than the mortars produced with natural sand, resulting in more cracks in the renderings. It was verified that the higher the sand/agglomerate and lime/cement ratios, the lower the mechanical strengths and the modulus of elasticity. A qualidade e a durabilidade de um revestimento de argamassa estão diretamente ligadas à capacidade de absorver deformações, que são medidas através do módulo de elasticidade. Este trabalho teve por objetivo verificar a influência das resistências mecânicas, bem como o proporcionamento de cimento, cal e areia, no módulo de elasticidade calculado pelo método dinâmico, utilizando o PUNDIT. Avaliou, também, a influência de dois tipos de areia. Foram utilizados cimento CP II Z 32 e cal virgem moída. Para o estudo experimental foram produzidas 18 argamassas, 9 com areia natural e 9 com areia de britagem. Com as argamassas produzidas, foram moldados corpos-de-prova cilíndricos de 5 cm x10 cm, prismáticos de 4 cm x4 cm x16 cm e revestidos painéis de 80 cm x 100 cm, com 2 cm de espessura, para ensaio de resistência de aderência à tração e observação do surgimento de fissuras. Os resultados mostraram que as argamassas produzidas com areia de britagem possuem maior módulo de elasticidade do que aquelas produzidas com areia natural, resultando em um maior número de fissuras no revestimento. À medida que aumentam as relações entre areia/aglomerante e cal/cimento, diminuem as resistências mecânicas e o módulo de elasticidade. ANTAC - Associação Nacional de Tecnologia do Ambiente Construído 2008-12-12 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://seer.ufrgs.br/ambienteconstruido/article/view/6386 Ambiente Construído; v. 8, n. 4 (2008); 21-35 Ambiente Construído; v. 8, n. 4 (2008); 21-35 Ambiente Construído; v. 8, n. 4 (2008); 21-35 1678-8621 1415-8876 por https://seer.ufrgs.br/ambienteconstruido/article/view/6386/4701 Direitos autorais 2016 Ambiente Construído https://creativecommons.org/licenses/by/4.0
institution	Universidade Federal do Rio Grande do Sul
collection	OJS
language	por
format	Online
author	Silva, Narciso Gonçalves da Campiteli, Vicente Coney
spellingShingle	Silva, Narciso Gonçalves da Campiteli, Vicente Coney Correlation between modulus of elasticity dynamic and mechanical strengths of cement mortars and sand with lime addition
author_facet	Silva, Narciso Gonçalves da Campiteli, Vicente Coney
author_sort	Silva, Narciso Gonçalves da
title	Correlation between modulus of elasticity dynamic and mechanical strengths of cement mortars and sand with lime addition
title_short	Correlation between modulus of elasticity dynamic and mechanical strengths of cement mortars and sand with lime addition
title_full	Correlation between modulus of elasticity dynamic and mechanical strengths of cement mortars and sand with lime addition
title_fullStr	Correlation between modulus of elasticity dynamic and mechanical strengths of cement mortars and sand with lime addition
title_full_unstemmed	Correlation between modulus of elasticity dynamic and mechanical strengths of cement mortars and sand with lime addition
title_sort	correlation between modulus of elasticity dynamic and mechanical strengths of cement mortars and sand with lime addition
description	The quality and the durability of a mortar covering are directly related its capacity to absorb deformations, which are measured by the modulus of elasticity (Young’s modulus). This work investigated the influence of the cement, lime, and sand on the mechanical strengths and modulus of elasticity of rendering mortars, the latter calculated by the dynamic method using the PUNDIT. The effects of a natural and artificial (crushed rock) sand were also evaluated. Cement CP II Z 32 and ground lime were used to prepare 18 mortars (9 with natural sand and 9 with crushed rock sand). Cylindrical 5 cm x10 cm and prismatic 4 cm x4 cm x16 cm specimens were cast for the tests. Masonry panels 80 cm x100 cm were built and covered by a 2cm thick layer of each mortar for pull-out tests and cracks observations. The results showed that the mortars with crushed rock sand have higher modulus of elasticity than the mortars produced with natural sand, resulting in more cracks in the renderings. It was verified that the higher the sand/agglomerate and lime/cement ratios, the lower the mechanical strengths and the modulus of elasticity.
publisher	ANTAC - Associação Nacional de Tecnologia do Ambiente Construído
publishDate	2008
url	https://seer.ufrgs.br/ambienteconstruido/article/view/6386
work_keys_str_mv	AT silvanarcisogoncalvesda correlationbetweenmodulusofelasticitydynamicandmechanicalstrengthsofcementmortarsandsandwithlimeaddition AT campitelivicenteconey correlationbetweenmodulusofelasticitydynamicandmechanicalstrengthsofcementmortarsandsandwithlimeaddition AT silvanarcisogoncalvesda correlacaoentremodulodeelasticidadedinamicoeresistenciasmecanicasdeargamassasdecimentocaleareia AT campitelivicenteconey correlacaoentremodulodeelasticidadedinamicoeresistenciasmecanicasdeargamassasdecimentocaleareia
_version_	1709370668781404160

Correlation between modulus of elasticity dynamic and mechanical strengths of cement mortars and sand with lime addition

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