{"id":54749,"date":"2020-09-29T13:25:18","date_gmt":"2020-09-29T11:25:18","guid":{"rendered":"https:\/\/mcrtecresa.com\/blog\/proteccion-al-fuego-en-forjados-de-casetones-recuperables"},"modified":"2025-10-22T13:30:54","modified_gmt":"2025-10-22T11:30:54","slug":"protecao-em-lajes-fungiformes-com-argamassa-tecwool","status":"publish","type":"post","link":"https:\/\/mcrtecresa.com\/pt\/blog\/protecao-em-lajes-fungiformes-com-argamassa-tecwool","title":{"rendered":"Isolamento termo-ac\u00fastico e prote\u00e7\u00e3o contra inc\u00eandios em lajes fungiformes com a argamassa Tecwool\u00ae"},"content":{"rendered":"<p>Em muitas ocasi\u00f5es, tanto na reforma como na constru\u00e7\u00e3o nova, encontramos este tipo de <strong>lajes bidirecionais com moldes recuper\u00e1veis<\/strong> que tem como principal vantagem permitir uma maior luz entre pilares, mas tamb\u00e9m apresenta alguma desvantagem, como:<\/p>\n<ol>\n<li>Um <strong>isolamento t\u00e9rmico inferior <\/strong>ao de uma laje de vigotas e abobadilhas tradicional.<\/li>\n<li>Um <strong>menor isolamento ac\u00fastico<\/strong> devido ao menor canto da laje que apresenta.<\/li>\n<li>\u00c0s vezes,<strong> menos resist\u00eancia ao fogo <\/strong>do que o exigido pelos regulamentos.<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<p>Do nosso departamento de I+D+I foram desenvolvidas\u00a0<strong>duas argamassas\u00a0<\/strong>que v\u00e3o corrigir estas tr\u00eas defici\u00eancias, se necess\u00e1rio, que s\u00e3o:<\/p>\n<ul>\n<li><a href=\"https:\/\/mcrtecresa.com\/pt\/argamassas-tecwool\/tecwool-t\">Argamassa\u00a0<span style=\"color: #ff0000;\"><strong>Tecwool T<\/strong><sup>\u00ae<\/sup><\/span><\/a> que nos oferece um excelente <strong>isolamento termo-ac\u00fastico<\/strong> at\u00e9 uma espessura de 6 cm e \u00e9 tamb\u00e9m <strong>Euroclasse A1<\/strong> (Material N\u00c3O COMBUST\u00cdVEL, sem contribui\u00e7\u00e3o para o fogo).<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p><img decoding=\"async\" class=\" wp-image-33041 aligncenter\" src=\"https:\/\/mcrtecresa.com\/wp-content\/uploads\/2020\/09\/imagen-Tecwool-300x179.jpg\" alt=\"Tecwool T\u00e9rmico\" width=\"461\" height=\"275\" srcset=\"https:\/\/mcrtecresa.com\/wp-content\/uploads\/2020\/09\/imagen-Tecwool-300x179.jpg 300w, https:\/\/mcrtecresa.com\/wp-content\/uploads\/2020\/09\/imagen-Tecwool-768x458.jpg 768w, https:\/\/mcrtecresa.com\/wp-content\/uploads\/2020\/09\/imagen-Tecwool.jpg 785w\" sizes=\"(max-width: 461px) 100vw, 461px\" \/><\/p>\n<p>&nbsp;<\/p>\n<ul>\n<li><a href=\"https:\/\/mcrtecresa.com\/pt\/argamassas-tecwool\/tecwool-f\"><span style=\"color: #ff0000;\"><strong>Argamassa Tecwool F<sup>\u00ae<\/sup><\/strong><\/span><\/a> que tem propriedades muito semelhantes em termos de isolamento termo-ac\u00fastico, mas que tamb\u00e9m funciona como uma camada protetora de bet\u00e3o, elevando a sua <strong>Resist\u00eancia ao Fogo<\/strong> at\u00e9 REI-240 minutos.<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p><img decoding=\"async\" class=\" wp-image-33025 aligncenter\" src=\"https:\/\/mcrtecresa.com\/wp-content\/uploads\/2020\/09\/Tecwool-F-300x180.jpg\" alt=\"Tecwool F\" width=\"425\" height=\"255\" srcset=\"https:\/\/mcrtecresa.com\/wp-content\/uploads\/2020\/09\/Tecwool-F-300x180.jpg 300w, https:\/\/mcrtecresa.com\/wp-content\/uploads\/2020\/09\/Tecwool-F-768x461.jpg 768w, https:\/\/mcrtecresa.com\/wp-content\/uploads\/2020\/09\/Tecwool-F.jpg 835w\" sizes=\"(max-width: 425px) 100vw, 425px\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>Agora vamos detalhar mais aprofundadamente as tr\u00eas caracter\u00edsticas que podem oferecer uma laje deste tipo as nossas argamassas <strong>Tecwool\u00aeF<\/strong> ou <strong>Tecwool\u00aeT<\/strong>:<\/p>\n<p><span style=\"color: #ff0000;\"><strong>ISOLAMENTO T\u00c9RMICO:<\/strong><\/span><\/p>\n<p>Se for necess\u00e1rio apenas um isolamento termo-ac\u00fastico, \u00e9 aconselh\u00e1vel utilizar a argamassa <strong>Tecwool\u00aeT,<\/strong> uma vez que pouparemos no consumo de material e melhoraremos o isolamento t\u00e9rmico no que diz respeito ao<a href=\"https:\/\/mcrtecresa.com\/pt\/argamassas-tecwool\/tecwool-f\"><strong> Tecwool\u00aeF<\/strong><\/a><strong>,<\/strong> mais concebido para a prote\u00e7\u00e3o contra inc\u00eandios.<\/p>\n<p>Ao n\u00edvel do isolamento t\u00e9rmico este produto tem um valor de Condutividade T\u00e9rmica \u2013 <strong>\u03bb<\/strong><strong>=0,0456 W\/mk.<\/strong><\/p>\n<p>Para uma laje deste tipo de canto total de 300 mm teremos a seguinte <strong>Transmit\u00e2ncia T\u00e9rmica U<\/strong> de acordo com a espessura de <a href=\"https:\/\/mcrtecresa.com\/pt\/argamassas-tecwool\/tecwool-t\"><strong>Tecwool T<\/strong><\/a><a href=\"https:\/\/mcrtecresa.com\/pt\/argamassas-tecwool\/tecwool-t\"><strong>\u00ae<\/strong><\/a> aplicado:<\/p>\n<p>&nbsp;<\/p>\n<p><img decoding=\"async\" class=\"aligncenter wp-image-54756 size-full\" src=\"https:\/\/mcrtecresa.com\/wp-content\/uploads\/2020\/09\/Tabla-espesor-tecwool.jpg\" alt=\"Tabla espesor tecwool\" width=\"1020\" height=\"200\" srcset=\"https:\/\/mcrtecresa.com\/wp-content\/uploads\/2020\/09\/Tabla-espesor-tecwool.jpg 1020w, https:\/\/mcrtecresa.com\/wp-content\/uploads\/2020\/09\/Tabla-espesor-tecwool-300x59.jpg 300w, https:\/\/mcrtecresa.com\/wp-content\/uploads\/2020\/09\/Tabla-espesor-tecwool-768x151.jpg 768w\" sizes=\"(max-width: 1020px) 100vw, 1020px\" \/><\/p>\n<p>&nbsp;<\/p>\n<p><span style=\"color: #ff0000;\"><strong>ABSOR\u00c7\u00c3O AC\u00daSTICA:<\/strong><\/span><\/p>\n<p>O bom desempenho deste material deve-se principalmente \u00e0 estrutura polim\u00f3rfica e \u00e0 porosidade da <strong>L\u00e3 de Rocha<\/strong> presente na sua composi\u00e7\u00e3o, que, juntamente com o seu sistema de aplica\u00e7\u00e3o por proje\u00e7\u00e3o pneum\u00e1tica (que permite o isolamento cont\u00ednuo sem pontes ac\u00fasticas ou destaques) o torne um material ideal para o isolamento do ru\u00eddo do ar aplicado em qualquer superf\u00edcie e seja testado de acordo com a <strong>EN ISO<\/strong> <strong>354<\/strong> e os coeficientes de absor\u00e7\u00e3o ac\u00fastica ponderados s\u00e3o expressos em conformidade com a <strong>EN ISO<\/strong> <strong>11654<\/strong> no quadro seguinte:<\/p>\n<p>&nbsp;<\/p>\n<p><img decoding=\"async\" class=\"aligncenter wp-image-54757 \" src=\"https:\/\/mcrtecresa.com\/wp-content\/uploads\/2020\/09\/coeficiente-de-absorcion-acustica.jpg\" alt=\"coeficiente de absorcion acustica\" width=\"594\" height=\"421\" srcset=\"https:\/\/mcrtecresa.com\/wp-content\/uploads\/2020\/09\/coeficiente-de-absorcion-acustica.jpg 705w, https:\/\/mcrtecresa.com\/wp-content\/uploads\/2020\/09\/coeficiente-de-absorcion-acustica-300x213.jpg 300w\" sizes=\"(max-width: 594px) 100vw, 594px\" \/><\/p>\n<p><img decoding=\"async\" class=\"aligncenter wp-image-54758 \" src=\"https:\/\/mcrtecresa.com\/wp-content\/uploads\/2020\/09\/Tabla-Absorcion-acustica.jpg\" alt=\"Tabla Absorcion acustica\" width=\"698\" height=\"137\" srcset=\"https:\/\/mcrtecresa.com\/wp-content\/uploads\/2020\/09\/Tabla-Absorcion-acustica.jpg 1020w, https:\/\/mcrtecresa.com\/wp-content\/uploads\/2020\/09\/Tabla-Absorcion-acustica-300x59.jpg 300w, https:\/\/mcrtecresa.com\/wp-content\/uploads\/2020\/09\/Tabla-Absorcion-acustica-768x151.jpg 768w\" sizes=\"(max-width: 698px) 100vw, 698px\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>Nos gr\u00e1ficos seguintes, para umas espessuras de 17 mm e 26 mm, podemos ver como o material Tecwool acrescenta a sua absor\u00e7\u00e3o ac\u00fastica \u00e0 medida que a intensidade da frequ\u00eancia aumenta, chegando mesmo \u00e0 absor\u00e7\u00e3o total do som para frequ\u00eancias acima de <strong>2000 Hz e 1000 Hz r<\/strong>espetivamente.<\/p>\n<p>.<\/p>\n<p>&nbsp;<\/p>\n<p><img decoding=\"async\" class=\"alignnone wp-image-54760 \" src=\"https:\/\/mcrtecresa.com\/wp-content\/uploads\/2020\/09\/Espesor-26.png\" alt=\"Espesor 26\" width=\"413\" height=\"233\" srcset=\"https:\/\/mcrtecresa.com\/wp-content\/uploads\/2020\/09\/Espesor-26.png 677w, https:\/\/mcrtecresa.com\/wp-content\/uploads\/2020\/09\/Espesor-26-300x169.png 300w, https:\/\/mcrtecresa.com\/wp-content\/uploads\/2020\/09\/Espesor-26-270x152.png 270w\" sizes=\"(max-width: 413px) 100vw, 413px\" \/> <img decoding=\"async\" class=\"alignnone wp-image-54759 \" src=\"https:\/\/mcrtecresa.com\/wp-content\/uploads\/2020\/09\/Espesor-17.png\" alt=\"Espesor 17\" width=\"401\" height=\"226\" srcset=\"https:\/\/mcrtecresa.com\/wp-content\/uploads\/2020\/09\/Espesor-17.png 668w, https:\/\/mcrtecresa.com\/wp-content\/uploads\/2020\/09\/Espesor-17-300x169.png 300w, https:\/\/mcrtecresa.com\/wp-content\/uploads\/2020\/09\/Espesor-17-270x152.png 270w\" sizes=\"(max-width: 401px) 100vw, 401px\" \/><\/p>\n<p><strong>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 Espessura 26 mm de Tecwool <\/strong>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 <strong>Espessura 17 mm de Tecwool <\/strong><\/p>\n<p>&nbsp;<\/p>\n<p><span style=\"color: #ff0000;\"><strong>RESIST\u00caNCIA AO FOGO:<\/strong><\/span><\/p>\n<p>Em muitos casos \u00e9 tamb\u00e9m necess\u00e1rio que, para al\u00e9m de que seja um material INCOMBUST\u00cdVEL, este material tamb\u00e9m atue como uma <strong>camada protetora de bet\u00e3o armado <\/strong>contra o fogo.<\/p>\n<p>Para aumentar a resist\u00eancia ao fogo de uma laje deste tipo quando <strong>n\u00e3o satisfaz<\/strong> os requisitos de acordo com os regulamentos, tanto no <strong>canto m\u00ednimo<\/strong> como na d<strong>ist\u00e2ncia da parede exposta \u00e0 <\/strong><strong>armadura met\u00e1lica, <\/strong>test\u00e1mos a argamassa \u00a0<a href=\"https:\/\/mcrtecresa.com\/pt\/argamassas-tecwool\/tecwool-f\"><strong>Tecwool F<\/strong><\/a><a href=\"https:\/\/mcrtecresa.com\/pt\/argamassas-tecwool\/tecwool-f\"><strong>\u00ae<\/strong><\/a> e conseguimos determinar a \u00a0<strong>espessura<\/strong> <strong>equivalente<\/strong> da nossa camada de prote\u00e7\u00e3o utilizando o seguinte gr\u00e1fico obtido pelo ensaio de elementos de suporte e limitadores de bet\u00e3o, de acordo com a <strong>UNE ENV 13.381-3, <\/strong>assim como \u00e9 marcado pelo \u00a0CTE.<\/p>\n<p>&nbsp;<\/p>\n<p><img decoding=\"async\" class=\"aligncenter wp-image-54754 \" src=\"https:\/\/mcrtecresa.com\/wp-content\/uploads\/2020\/09\/tabla-curvas-espesor.png\" alt=\"tabla curvas espesor\" width=\"603\" height=\"537\" srcset=\"https:\/\/mcrtecresa.com\/wp-content\/uploads\/2020\/09\/tabla-curvas-espesor.png 654w, https:\/\/mcrtecresa.com\/wp-content\/uploads\/2020\/09\/tabla-curvas-espesor-300x267.png 300w\" sizes=\"(max-width: 603px) 100vw, 603px\" \/><\/p>\n<p>Por exemplo, se fora necess\u00e1rio um canto m\u00ednimo de laje, de acordo com os regulamentos para cumprir com<strong> REI-120, <\/strong>de <strong>120 mm<\/strong>, e s\u00f3 tivermos <strong>60 mm<\/strong> de bet\u00e3o, precisaremos de um equivalente a mais <strong>60 mm<\/strong> para cumprir e, de acordo com a linha azul do gr\u00e1fico, conseguiremos alcan\u00e7\u00e1-lo com 26 mm da argamassa <a href=\"https:\/\/mcrtecresa.com\/pt\/argamassas-tecwool\/tecwool-f\"><strong>Tecwool F<\/strong><\/a><a href=\"https:\/\/mcrtecresa.com\/pt\/argamassas-tecwool\/tecwool-f\"><strong>\u00ae<\/strong><\/a>.<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Em muitas ocasi\u00f5es, tanto na reforma como na constru\u00e7\u00e3o nova, encontramos este tipo de lajes bidirecionais com moldes recuper\u00e1veis que tem como principal vantagem permitir uma maior luz entre pilares,&#8230;<\/p>\n","protected":false},"author":2,"featured_media":54751,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[184,269],"tags":[],"class_list":["post-54749","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-mcr-tecresa","category-produtos-e-servicos"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Isolamento termo-ac\u00fastico e prote\u00e7\u00e3o contra inc\u00eandios em lajes fungiformes com a argamassa Tecwool\u00ae - Mcr Tecresa<\/title>\n<meta name=\"description\" content=\"Aislamiento termico. 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