{"id":14833,"date":"2026-07-07T08:36:24","date_gmt":"2026-07-07T08:36:24","guid":{"rendered":"https:\/\/tenessy.com\/?p=14833"},"modified":"2026-07-14T08:54:12","modified_gmt":"2026-07-14T08:54:12","slug":"hydrophobic-redispersible-polymer-powder-in-practice","status":"publish","type":"post","link":"https:\/\/tenessy.com\/pt\/po-de-polimero-hidrofobico-redispersavel-na-pratica\/","title":{"rendered":"Aumentando a impermeabiliza\u00e7\u00e3o e a resist\u00eancia \u00e0 penetra\u00e7\u00e3o de \u00e1gua da argamassa pr\u00e9-misturada desde a origem"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"14833\" class=\"elementor elementor-14833\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-fdbc6e4 e-con-full e-flex e-con e-parent\" data-id=\"fdbc6e4\" data-element_type=\"container\" data-settings=\"{&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-105ebe2 elementor-widget elementor-widget-image\" data-id=\"105ebe2\" data-element_type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"534\" src=\"https:\/\/tenessy.com\/wp-content\/uploads\/2026\/07\/Dry-Mix-Mortar-RDP-1024x683.jpg\" class=\"attachment-large size-large wp-image-14853\" alt=\"Argamassa-Pronta-para-Uso-RDP\" srcset=\"https:\/\/tenessy.com\/wp-content\/uploads\/2026\/07\/Dry-Mix-Mortar-RDP-1024x683.jpg 1024w, https:\/\/tenessy.com\/wp-content\/uploads\/2026\/07\/Dry-Mix-Mortar-RDP-300x200.jpg 300w, https:\/\/tenessy.com\/wp-content\/uploads\/2026\/07\/Dry-Mix-Mortar-RDP-768x512.jpg 768w, https:\/\/tenessy.com\/wp-content\/uploads\/2026\/07\/Dry-Mix-Mortar-RDP-1536x1024.jpg 1536w, https:\/\/tenessy.com\/wp-content\/uploads\/2026\/07\/Dry-Mix-Mortar-RDP-2048x1365.jpg 2048w, https:\/\/tenessy.com\/wp-content\/uploads\/2026\/07\/Dry-Mix-Mortar-RDP-18x12.jpg 18w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e0d9856 elementor-widget elementor-widget-heading\" data-id=\"e0d9856\" data-element_type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Introdu\u00e7\u00e3o<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5ae54ec elementor-widget elementor-widget-text-editor\" data-id=\"5ae54ec\" data-element_type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"ds-markdown-paragraph\"><span class=\"\">Vazamentos em edif\u00edcios s\u00e3o um defeito cr\u00f4nico de qualidade e uma amea\u00e7a cr\u00edtica \u00e0 satisfa\u00e7\u00e3o dos ocupantes. Em in\u00fameros casos de reparo, o caminho pela qual a \u00e1gua penetra muitas vezes n\u00e3o s\u00e3o as fissuras estruturais, mas sim a conectividade capilar inerente, as fissuras por retra\u00e7\u00e3o de secagem ou a falha de ader\u00eancia interfacial dentro do\u00a0<\/span><a href=\"https:\/\/tenessy.com\/applications\/drymix-mortar\/\"><strong><span class=\"\">argamassa de mistura seca<\/span><\/strong><\/a><span class=\"\">\u00a0em si. As contramedidas convencionais dependem da aplica\u00e7\u00e3o de revestimentos imperme\u00e1veis ou do aumento do teor de cimento. No entanto, a primeira op\u00e7\u00e3o acrescenta etapas ao processo e aumenta os custos, enquanto a segunda agrava os riscos de retra\u00e7\u00e3o. A quest\u00e3o central \u00e9:\u00a0<\/span><strong><span class=\"\">A argamassa possui impermeabiliza\u00e7\u00e3o e impermeabilidade intr\u00ednsecas suficientemente robustas?<\/span><\/strong><\/p><p class=\"ds-markdown-paragraph\"><strong><span class=\"\">P\u00f3 de pol\u00edmero hidrof\u00f3bico redispers\u00e1vel<\/span><\/strong><span class=\"\">\u00a0transforma a fun\u00e7\u00e3o de impermeabiliza\u00e7\u00e3o de um \u201crevestimento superficial\u201d em uma \u201cpropriedade integrada do material\u201d. N\u00e3o se trata de um simples aditivo, mas de uma reestrutura\u00e7\u00e3o funcional fundamental do\u00a0<\/span><strong><span class=\"\">argamassa de mistura seca<\/span><\/strong><span class=\"\">\u00a0no n\u00edvel microestrutural. Com base em anos de experi\u00eancia pr\u00e1tica em formula\u00e7\u00e3o, este artigo detalha sistematicamente como os p\u00f3s hidrof\u00f3bicos constituem uma defesa prim\u00e1ria contra a penetra\u00e7\u00e3o de \u00e1gua em\u00a0<\/span><strong><span class=\"\">alvenaria, reboco, reparos e argamassas decorativas<\/span><\/strong><span class=\"\">, a partir da pr\u00f3pria composi\u00e7\u00e3o do material.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-bbece77 elementor-widget elementor-widget-heading\" data-id=\"bbece77\" data-element_type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">I. Repensando os p\u00f3s de pol\u00edmeros hidrof\u00f3bicos<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-025f6db elementor-widget elementor-widget-image\" data-id=\"025f6db\" data-element_type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"800\" height=\"534\" src=\"https:\/\/tenessy.com\/wp-content\/uploads\/2026\/07\/redispersible-Polymer-Powder-Product-1024x683.webp\" class=\"attachment-large size-large wp-image-14852\" alt=\"Produto em p\u00f3 de pol\u00edmero redispers\u00edvel\" srcset=\"https:\/\/tenessy.com\/wp-content\/uploads\/2026\/07\/redispersible-Polymer-Powder-Product-1024x683.webp 1024w, https:\/\/tenessy.com\/wp-content\/uploads\/2026\/07\/redispersible-Polymer-Powder-Product-300x200.webp 300w, https:\/\/tenessy.com\/wp-content\/uploads\/2026\/07\/redispersible-Polymer-Powder-Product-768x512.webp 768w, https:\/\/tenessy.com\/wp-content\/uploads\/2026\/07\/redispersible-Polymer-Powder-Product-1536x1024.webp 1536w, https:\/\/tenessy.com\/wp-content\/uploads\/2026\/07\/redispersible-Polymer-Powder-Product-2048x1365.webp 2048w, https:\/\/tenessy.com\/wp-content\/uploads\/2026\/07\/redispersible-Polymer-Powder-Product-18x12.webp 18w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-740e220 elementor-widget elementor-widget-text-editor\" data-id=\"740e220\" data-element_type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"ds-markdown-paragraph\"><span class=\"\"><strong><a href=\"https:\/\/tenessy.com\/products\/redispersible-polymer-powder\/\">P\u00f3s polim\u00e9ricos redispers\u00e1veis<\/a><\/strong> s\u00e3o amplamente utilizados em\u00a0<\/span><strong><span class=\"\">argamassas pr\u00e9-misturadas a seco<\/span><\/strong><span class=\"\">, mas seu papel funcional \u00e9 frequentemente definido de forma restrita como um \u201cpotenciador de ligante\u201d. Na realidade, os p\u00f3s polim\u00e9ricos s\u00e3o classificados, de acordo com a polaridade da superf\u00edcie, em tipos hidrof\u00edlicos e hidrof\u00f3bicos. Os p\u00f3s VAE convencionais, devido ao seu teor de col\u00f3ide protetor (\u00e1lcool polivin\u00edlico), formam filmes sens\u00edveis \u00e0 \u00e1gua ap\u00f3s a redispers\u00e3o \u2014 eles incham e at\u00e9 mesmo se reemulsificam ap\u00f3s exposi\u00e7\u00e3o prolongada \u00e0 \u00e1gua, levando a uma degrada\u00e7\u00e3o significativa do desempenho.<\/span><\/p><p class=\"ds-markdown-paragraph\"><strong><span class=\"\">P\u00f3 de pol\u00edmero hidrof\u00f3bico<\/span><\/strong><span class=\"\">\u00a0\u00e9 um p\u00f3 de pol\u00edmero funcionalizado, modificado durante a polimeriza\u00e7\u00e3o ou por meio de um p\u00f3s-tratamento no processo de secagem por pulveriza\u00e7\u00e3o, incorporando silano, estearato ou mon\u00f4meros hidrof\u00f3bicos contendo fl\u00faor. Suas caracter\u00edsticas principais incluem:<\/span><\/p><ul><li><p class=\"ds-markdown-paragraph\"><strong><span class=\"\">Forma\u00e7\u00e3o de pel\u00edcula de baixa energia superficial<\/span><\/strong><span class=\"\">: Ap\u00f3s a redispers\u00e3o em \u00e1gua e a subsequente evapora\u00e7\u00e3o da \u00e1gua durante a cura, as part\u00edculas do p\u00f3 se aglutinam formando uma pel\u00edcula com molhabilidade \u00e0 \u00e1gua extremamente baixa, atingindo um \u00e2ngulo de contato de\u00a0<\/span><strong><span class=\"\">90\u00b0\u2013110\u00b0<\/span><\/strong><span class=\"\">;<\/span><\/p><\/li><li><p class=\"ds-markdown-paragraph\"><strong><span class=\"\">Hidrofobiza\u00e7\u00e3o da parede dos poros capilares<\/span><\/strong><span class=\"\">: As part\u00edculas do p\u00f3 concentram-se preferencialmente nas paredes dos poros capilares da matriz de cimento e ao redor das superf\u00edcies dos agregados. Ap\u00f3s a cura, elas formam um revestimento hidrof\u00f3bico em nanoescala que bloqueia eficazmente a ascens\u00e3o capilar;<\/span><\/p><\/li><li><p class=\"ds-markdown-paragraph\"><strong><span class=\"\">Rea\u00e7\u00f5es de ancoragem qu\u00edmica<\/span><\/strong><span class=\"\">: Os grupos reativos (por exemplo, -Si(OR)\u2083) nos p\u00f3s modificados com silano sofrem hidr\u00f3lise e policondensa\u00e7\u00e3o na pasta de cimento alcalina, formando liga\u00e7\u00f5es covalentes com o gel C-S-H. Isso garante que o efeito hidrof\u00f3bico seja permanente, em vez de uma mera \u201clubrifica\u00e7\u00e3o superficial\u201d f\u00edsica.<\/span><\/p><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0c8fd91 elementor-widget elementor-widget-heading\" data-id=\"0c8fd91\" data-element_type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">II.  A l\u00f3gica subjacente \u00e0 impermeabiliza\u00e7\u00e3o e \u00e0 impermeabilidade<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9d3e02e elementor-widget elementor-widget-text-editor\" data-id=\"9d3e02e\" data-element_type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"ds-markdown-paragraph\"><span class=\"\">Do ponto de vista f\u00edsico-qu\u00edmico, o endurecido\u00a0<\/span><strong><span class=\"\">argamassa de mistura seca<\/span><\/strong><span class=\"\">\u00a0\u00e9 um meio poroso cujos raios dos poros se situam predominantemente na faixa de\u00a0<\/span><strong><span class=\"\">0,01\u201310 \u03bcm<\/span><\/strong><span class=\"\">\u00a0intervalo. A penetra\u00e7\u00e3o da \u00e1gua sob press\u00e3o segue\u00a0<\/span><strong><span class=\"\">Lei de Darcy<\/span><\/strong><span class=\"\">, em que a permeabilidade \u00e9 proporcional \u00e0 porosidade e ao quadrado do raio dos poros. Os m\u00e9todos tradicionais para melhorar a impermeabilidade \u2014 como reduzir a rela\u00e7\u00e3o \u00e1gua\/cimento ou adicionar aditivos minerais ultrafinos \u2014 visam fundamentalmente \u201creduzir o tamanho dos poros\u201d, mas n\u00e3o alteram a natureza hidrof\u00edlica das paredes dos poros.<\/span><\/p><p class=\"ds-markdown-paragraph\"><span class=\"\">A introdu\u00e7\u00e3o do p\u00f3 de pol\u00edmero hidrof\u00f3bico aprimora a estrat\u00e9gia de impermeabiliza\u00e7\u00e3o, passando da \u201cdensifica\u00e7\u00e3o f\u00edsica\u201d para um mecanismo duplo:\u00a0<\/span><strong><span class=\"\">\u201cdensifica\u00e7\u00e3o f\u00edsica + hidrofobicidade interfacial\u201d<\/span><\/strong><span class=\"\">\u00a0.<\/span><\/p><ol start=\"1\"><li><p class=\"ds-markdown-paragraph\"><strong><span class=\"\">Rede de pol\u00edmeros bloqueando canais capilares<\/span><\/strong><span class=\"\">: \u00c0 medida que o cimento se hidrata, o p\u00f3 forma gradualmente uma pel\u00edcula. Essa rede polim\u00e9rica tridimensional preenche alguns poros interconectados e, gra\u00e7as \u00e0 sua flexibilidade inerente, amortece as tens\u00f5es decorrentes da retra\u00e7\u00e3o por secagem, reduzindo assim a forma\u00e7\u00e3o de microfissuras.<\/span><\/p><\/li><li><p class=\"ds-markdown-paragraph\"><strong><span class=\"\">Convers\u00e3o de energia superficial das paredes dos poros<\/span><\/strong><span class=\"\">: Os grupos hidrof\u00f3bicos se alinham direcionalmente nas superf\u00edcies das paredes dos poros, reduzindo drasticamente a tens\u00e3o interfacial s\u00f3lido-l\u00edquido. Quando \u00e9 aplicada press\u00e3o hidr\u00e1ulica, as mol\u00e9culas de \u00e1gua t\u00eam dificuldade para se espalhar pelas paredes hidrof\u00f3bicas dos poros. A press\u00e3o capilar passa de uma for\u00e7a \u201catrativa\u201d para uma \u201cresistiva\u201d, aumentando significativamente a press\u00e3o de impermeabilidade.<\/span><\/p><\/li><li><p class=\"ds-markdown-paragraph\"><strong><span class=\"\">Fortalecimento da zona de transi\u00e7\u00e3o interfacial (ITZ)<\/span><\/strong><span class=\"\">: A interface entre o agregado e a pasta \u00e9 um ponto vulner\u00e1vel ao vazamento. O p\u00f3 hidrof\u00f3bico se acumula nessa regi\u00e3o formando uma camada rica em pol\u00edmeros, o que reduz a rela\u00e7\u00e3o \u00e1gua\/cimento local e bloqueia a conectividade dos microvazios na interface \u2014 um efeito que os enchimentos minerais tradicionais n\u00e3o conseguem alcan\u00e7ar.<\/span><\/p><\/li><\/ol><p class=\"ds-markdown-paragraph\"><span class=\"\">O resultado pr\u00e1tico desse mecanismo \u00e9 substancial:\u00a0<\/span><strong><span class=\"\">mesmo que a argamassa apresente fissuras finas (\u22640,2 mm), a \u00e1gua, sob press\u00e3o nula ou baixa, tem dificuldade para penetrar<\/span><\/strong><span class=\"\">, proporcionando uma \u201cmargem de toler\u00e2ncia\u201d para a capacidade de impermeabiliza\u00e7\u00e3o pr\u00f3pria da estrutura.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-9b2cd0b e-flex e-con-boxed e-con e-parent\" data-id=\"9b2cd0b\" data-element_type=\"container\" data-settings=\"{&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-47b4288 elementor-widget elementor-widget-heading\" data-id=\"47b4288\" data-element_type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">III. Fundamentos da Formula\u00e7\u00e3o Pr\u00e1tica e do Controle de Processos<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a4a0041 elementor-widget elementor-widget-text-editor\" data-id=\"a4a0041\" data-element_type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"ds-markdown-paragraph\"><span class=\"\">Integra\u00e7\u00e3o de p\u00f3 de pol\u00edmero hidrof\u00f3bico em\u00a0<\/span><strong><span class=\"\">argamassa de mistura seca<\/span><\/strong><span class=\"\">\u00a0A produ\u00e7\u00e3o n\u00e3o consiste em uma simples substitui\u00e7\u00e3o, na propor\u00e7\u00e3o de um por um, do p\u00f3 convencional. A seguir, apresentamos princ\u00edpios fundamentais derivados de anos de experi\u00eancia em produ\u00e7\u00e3o em escala industrial:<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-485f656 elementor-widget elementor-widget-heading\" data-id=\"485f656\" data-element_type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">1. Otimiza\u00e7\u00e3o da dosagem: Encontrando o equil\u00edbrio entre \u201cimpermeabiliza\u00e7\u00e3o e resist\u00eancia\u201d<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d6890e8 elementor-widget elementor-widget-text-editor\" data-id=\"d6890e8\" data-element_type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"ds-markdown-paragraph\"><span class=\"\">Para sistemas \u00e0 base de cimento, a dosagem recomendada de p\u00f3 hidrof\u00f3bico \u00e9 de\u00a0<\/span><strong><span class=\"\">1,5%\u20134,5% do material ciment\u00edcio total<\/span><\/strong><span class=\"\">:<\/span><\/p><ul><li><p class=\"ds-markdown-paragraph\"><strong><span class=\"\">Argamassa imperme\u00e1vel para reboco (classe P6\u2013P8)<\/span><\/strong><span class=\"\">: Recomenda-se o intervalo de 2,0%\u20133,0%. Nesse n\u00edvel, a absor\u00e7\u00e3o de \u00e1gua em 28 dias pode ser reduzida para 6%\u20138%, com a perda de resist\u00eancia \u00e0 compress\u00e3o limitada a 8%;<\/span><\/p><\/li><li><p class=\"ds-markdown-paragraph\"><strong><span class=\"\">Argamassa impermeabilizante de componente \u00fanico (P10 e superior)<\/span><\/strong><span class=\"\">: Recomenda-se a propor\u00e7\u00e3o de 3,5%\u20134,5%. Quando combinado com um superplastificante adequado, a press\u00e3o de impermeabilidade aos 28 dias pode ultrapassar 1,2 MPa;<\/span><\/p><\/li><li><p class=\"ds-markdown-paragraph\"><strong><span class=\"\">Argamassa e rejuntes decorativos<\/span><\/strong><span class=\"\">: Recomenda-se o uso do 2.0%\u20132.5%, aproveitando principalmente suas fun\u00e7\u00f5es anti-efloresc\u00eancia e anti-sujidade.<\/span><\/p><\/li><\/ul><p class=\"ds-markdown-paragraph\"><span class=\"\">\u00c9 fundamental observar que o uso excessivo de p\u00f3 hidrof\u00f3bico (&gt;5%) pode aumentar o arrastamento de ar, reduzindo a densidade e prejudicando a impermeabilidade.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-76e20f5 elementor-widget elementor-widget-heading\" data-id=\"76e20f5\" data-element_type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">2. Compatibilidade dos aditivos: a sinergia \u00e9 fundamental<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-31c40b7 elementor-widget elementor-widget-text-editor\" data-id=\"31c40b7\" data-element_type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"ds-markdown-paragraph\"><strong><span class=\"\">Aditivos impermeabilizantes para argamassa<\/span><\/strong><span class=\"\">\u00a0Nunca funcionam isoladamente. O p\u00f3 hidrof\u00f3bico deve ser coordenado com precis\u00e3o com os seguintes componentes:<\/span><\/p><ul><li><p class=\"ds-markdown-paragraph\"><a href=\"https:\/\/tenessy.com\/products\/cellulose-ether\/\"><strong><span class=\"\">\u00c9ter de celulose<\/span><\/strong><\/a><span class=\"\">: Proporciona reten\u00e7\u00e3o de \u00e1gua e espessamento, garantindo a dispers\u00e3o e a hidrata\u00e7\u00e3o completas do p\u00f3. No entanto, os \u00e9teres de metilcelulose reduzem a tens\u00e3o superficial do sistema, o que pode enfraquecer o efeito hidrof\u00f3bico. Portanto,\u00a0<\/span><a href=\"https:\/\/tenessy.com\/products\/hec-hydroxyethyl-cellulose\/\"><strong><span class=\"\">hidroxietilcelulose (HEC)<\/span><\/strong><\/a><span class=\"\">\u00a0ou modificado\u00a0<\/span><a href=\"https:\/\/tenessy.com\/products\/hpmc-hydroxypropyl-methyl-cellulose\/\"><strong><span class=\"\">hidroxipropilmetilcelulose (HPMC)<\/span><\/strong><\/a><span class=\"\">\u00a0\u00e9 prefer\u00edvel, com uma dosagem controlada (\u22640,3%);<\/span><\/p><\/li><li><p class=\"ds-markdown-paragraph\"><strong><span class=\"\">Superplastificante<\/span><\/strong><span class=\"\">: <a href=\"https:\/\/tenessy.com\/products\/polycarboxylate-superplasticizer\/\">Superplastificantes \u00e0 base de policarboxilatos<\/a> reduzem a demanda por \u00e1gua e aumentam a densidade, apresentando um efeito sin\u00e9rgico positivo com o p\u00f3 hidrof\u00f3bico. No entanto, \u00e9 essencial realizar testes de compatibilidade com o p\u00f3;<\/span><\/p><\/li><li><p class=\"ds-markdown-paragraph\"><a href=\"https:\/\/tenessy.com\/products\/powder-defoamer\/\"><strong><span class=\"\">Antiespumante<\/span><\/strong><\/a><span class=\"\">: Indispens\u00e1vel. As bolhas de ar introduzidas durante a mistura pelo p\u00f3 e pelo superplastificante podem se tornar caminhos de \u201ccurto-circuito\u201d para a \u00e1gua. Recomenda-se o uso de um antiespumante em p\u00f3 na propor\u00e7\u00e3o de 0,1%\u20130,3%;<\/span><\/p><\/li><li><p class=\"ds-markdown-paragraph\"><strong><span class=\"\">Agente incorporador de ar<\/span><\/strong><span class=\"\">:\u00a0<\/span><strong><span class=\"\">Use com cautela ou evite completamente<\/span><\/strong><span class=\"\">. Os poros grandes e nocivos que ficarem retidos neutralizar\u00e3o os benef\u00edcios do p\u00f3 hidrof\u00f3bico no que diz respeito ao bloqueio dos poros.<\/span><\/p><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8d6bfd3 elementor-widget elementor-widget-heading\" data-id=\"8d6bfd3\" data-element_type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">3. Adaptabilidade na produ\u00e7\u00e3o e na constru\u00e7\u00e3o<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3db5f89 elementor-widget elementor-widget-text-editor\" data-id=\"3db5f89\" data-element_type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ul><li><p class=\"ds-markdown-paragraph\"><strong><span class=\"\">Uniformidade da mistura<\/span><\/strong><span class=\"\">: Dada a baixa dosagem, um\u00a0<\/span><strong><span class=\"\">pr\u00e9-mistura<\/span><\/strong><span class=\"\">\u00a0Esse processo \u00e9 obrigat\u00f3rio. Misture a seco o p\u00f3 com cimento e areia por pelo menos 120 segundos para garantir uma distribui\u00e7\u00e3o uniformemente microsc\u00f3pica e evitar aglomera\u00e7\u00e3o ou esgotamento localizados;<\/span><\/p><\/li><li><p class=\"ds-markdown-paragraph\"><strong><span class=\"\">Sensibilidade da demanda por \u00e1gua<\/span><\/strong><span class=\"\">: O sistema hidrof\u00f3bico \u00e9 altamente sens\u00edvel ao teor de \u00e1gua. Um aumento de 5% na \u00e1gua de mistura pode reduzir o grau de impermeabilidade em 1 a 2 n\u00edveis. Rigoroso\u00a0<\/span><strong><span class=\"\">controle da rela\u00e7\u00e3o \u00e1gua-cimento<\/span><\/strong><span class=\"\">\u00a0deve ser aplicado no local, de prefer\u00eancia por meio de equipamentos automatizados de medi\u00e7\u00e3o de consumo de \u00e1gua;<\/span><\/p><\/li><li><p class=\"ds-markdown-paragraph\"><strong><span class=\"\">Condi\u00e7\u00f5es de cura<\/span><\/strong><span class=\"\">: A cura por umidade na fase inicial continua sendo essencial. A hidrata\u00e7\u00e3o do cimento requer \u00e1gua suficiente; manter um ambiente \u00famido durante os primeiros 3 dias permite que a pel\u00edcula hidrof\u00f3bica desenvolva plenamente seu efeito repelente \u00e0 \u00e1gua. A perda prematura de \u00e1gua resultar\u00e1 em m\u00e1 forma\u00e7\u00e3o da pel\u00edcula e hidrata\u00e7\u00e3o inadequada do cimento.<\/span><\/p><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-20894c7 elementor-widget elementor-widget-heading\" data-id=\"20894c7\" data-element_type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">IV. Aplica\u00e7\u00f5es t\u00edpicas e requisitos de desempenho diferenciados<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c80091a elementor-widget elementor-widget-text-editor\" data-id=\"c80091a\" data-element_type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"ds-markdown-paragraph\"><span class=\"\">Diferente\u00a0<\/span><strong><span class=\"\">argamassa de mistura seca<\/span><\/strong><span class=\"\">\u00a0Esses tipos apresentam expectativas distintas de desempenho no que diz respeito \u00e0 hidrofobicidade, exigindo uma abordagem de formula\u00e7\u00e3o personalizada:<\/span><\/p><p class=\"ds-markdown-paragraph\"><strong><span class=\"\">\u2460 Argamassa de reboco imperme\u00e1vel para uso externo<\/span><\/strong><br \/><span class=\"\">Requisitos principais: baixa absor\u00e7\u00e3o de \u00e1gua + alta resist\u00eancia de ader\u00eancia + resist\u00eancia ao congelamento e descongelamento. Nessas formula\u00e7\u00f5es, o p\u00f3 hidrof\u00f3bico deve ser combinado com fibras adequadas (polipropileno ou lignocelulose) para aumentar a resist\u00eancia a fissuras. Os dados dos testes mostram que, ap\u00f3s 25 ciclos de congelamento-degelo, a perda de resist\u00eancia \u00e0 compress\u00e3o das formula\u00e7\u00f5es modificadas hidrofobicamente \u00e9 reduzida em aproximadamente 60% em compara\u00e7\u00e3o com o grupo de controle.<\/span><\/p><p class=\"ds-markdown-paragraph\"><strong><span class=\"\">\u2461 <a href=\"https:\/\/tenessy.com\/applications\/tile-adhesive\/\">Adesivos para azulejos<\/a> e rejuntes (instala\u00e7\u00e3o a \u00famido)<\/span><\/strong><br \/><span class=\"\">Requisitos principais: preven\u00e7\u00e3o de efloresc\u00eancia + resist\u00eancia \u00e0 \u00e1gua. A efloresc\u00eancia ocorre quando sais sol\u00faveis migram para a superf\u00edcie com a \u00e1gua e se cristalizam. O p\u00f3 hidrof\u00f3bico bloqueia os caminhos cont\u00ednuos de \u00e1gua, reduzindo substancialmente o potencial de efloresc\u00eancia. Em rejuntes brancos, a modifica\u00e7\u00e3o hidrof\u00f3bica alcan\u00e7a uma absor\u00e7\u00e3o de \u00e1gua \u22643% e melhora significativamente a resist\u00eancia a manchas.<\/span><\/p><p class=\"ds-markdown-paragraph\"><strong><span class=\"\">\u2462 Argamassas de reparo (de camada fina e estruturais)<\/span><\/strong><br \/><span class=\"\">Requisitos fundamentais: sinergia entre a ader\u00eancia interfacial e a impermeabilidade. A interface entre a camada de reparo e o substrato de concreto existente \u00e9 o ponto mais fraco. A pel\u00edcula de pol\u00edmero formada na interface pelo p\u00f3 hidrof\u00f3bico bloqueia simultaneamente a penetra\u00e7\u00e3o de \u00e1gua e amortece a tens\u00e3o de retra\u00e7\u00e3o, evitando a delamina\u00e7\u00e3o e o desprendimento.<\/span><\/p><p class=\"ds-markdown-paragraph\"><strong><span class=\"\">\u2463 Massas imperme\u00e1veis e argamassas decorativas<\/span><\/strong><br \/><span class=\"\">Requisitos principais: hidrofobicidade da superf\u00edcie + permeabilidade ao vapor. As camadas decorativas externas precisam ser \u201cimperme\u00e1veis externamente, mas respir\u00e1veis internamente\u201d. As argamassas decorativas modificadas com p\u00f3 hidrof\u00f3bico podem manter um coeficiente de transmiss\u00e3o de vapor de \u00e1gua de\u00a0<\/span><strong><span class=\"\">\u22652,5\u00d710\u207b\u2076 g\/(m\u00b7s\u00b7Pa)<\/span><\/strong><span class=\"\">, permitindo que a umidade interna seja eliminada de forma eficaz e evitando a forma\u00e7\u00e3o de bolhas ou o descascamento da camada de acabamento.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-27e8afe elementor-widget elementor-widget-heading\" data-id=\"27e8afe\" data-element_type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">V. Sistemas de verifica\u00e7\u00e3o de desempenho e controle de qualidade<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-33c8404 elementor-widget elementor-widget-text-editor\" data-id=\"33c8404\" data-element_type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"ds-markdown-paragraph\"><span class=\"\">O valor das aplica\u00e7\u00f5es pr\u00e1ticas deve ser fundamentado em dados emp\u00edricos. Nas inspe\u00e7\u00f5es de rotina nas f\u00e1bricas e nas verifica\u00e7\u00f5es de qualidade no local para\u00a0<\/span><strong><span class=\"\">argamassa de mistura seca<\/span><\/strong><span class=\"\">, as seguintes m\u00e9tricas devem ser priorizadas:<\/span><\/p><div class=\"ds-scroll-area ds-scroll-area--show-on-focus-within ds-scroll-area--enabled _1210dd7 c03cafe9\"><table><thead><tr><th><span class=\"\">Item de teste<\/span><\/th><th><span class=\"\">Norma de teste<\/span><\/th><th><span class=\"\">Linha de Passagem Modificada Hidrof\u00f3bica (Refer\u00eancia)<\/span><\/th><\/tr><\/thead><tbody><tr><td><span class=\"\">Absor\u00e7\u00e3o de \u00e1gua em 24 horas<\/span><\/td><td><span class=\"\">JC\/T 984<\/span><\/td><td><span class=\"\">\u22645% (tipo \u00e0 prova d\u2019\u00e1gua) \/ \u22648% (tipo para reboco)<\/span><\/td><\/tr><tr><td><span class=\"\">Press\u00e3o de impermeabilidade (28 dias)<\/span><\/td><td><span class=\"\">GB\/T 18445<\/span><\/td><td><span class=\"\">\u22650,8 MPa (classe P8)<\/span><\/td><\/tr><tr><td><span class=\"\">Resist\u00eancia \u00e0 tra\u00e7\u00e3o por ader\u00eancia (original)<\/span><\/td><td><span class=\"\">JC\/T 547<\/span><\/td><td><span class=\"\">\u22650,7 MPa<\/span><\/td><\/tr><tr><td><span class=\"\">Coeficiente de amolecimento<\/span><\/td><td><span class=\"\">GB\/T 4111<\/span><\/td><td><span class=\"\">\u22650,85<\/span><\/td><\/tr><\/tbody><\/table><\/div><p class=\"ds-markdown-paragraph\"><span class=\"\">Al\u00e9m disso,\u00a0<\/span><strong><span class=\"\">medi\u00e7\u00e3o do \u00e2ngulo de contato<\/span><\/strong><span class=\"\">\u00a0e\u00a0<\/span><strong><span class=\"\">taxa de absor\u00e7\u00e3o capilar de \u00e1gua<\/span><\/strong><span class=\"\">\u00a0s\u00e3o dois indicadores sens\u00edveis em n\u00edvel micro que refletem a efic\u00e1cia hidrof\u00f3bica e a estabilidade. Recomenda-se a inclus\u00e3o desses indicadores nos protocolos de controle de qualidade de rotina.<\/span><\/p><p class=\"ds-markdown-paragraph\"><span class=\"\">Uma avalia\u00e7\u00e3o qualitativa simples no local: aplique uma gota de \u00e1gua na superf\u00edcie da argamassa endurecida. Se a gota formar uma gota hemisf\u00e9rica e rolar para fora sem molhar a superf\u00edcie, a modifica\u00e7\u00e3o hidrof\u00f3bica \u00e9 eficaz. Por outro lado, se a gota se espalhar e penetrar rapidamente, isso indica poss\u00edveis problemas com a dosagem do p\u00f3, a uniformidade da dispers\u00e3o ou o controle do teor de \u00e1gua.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d8fadd9 elementor-widget elementor-widget-heading\" data-id=\"d8fadd9\" data-element_type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Conclus\u00e3o<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6cac3e9 elementor-widget elementor-widget-text-editor\" data-id=\"6cac3e9\" data-element_type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"ds-markdown-paragraph\"><span class=\"\">Aumentar a impermeabiliza\u00e7\u00e3o e a resist\u00eancia \u00e0 penetra\u00e7\u00e3o de \u00e1gua de\u00a0<\/span><strong><span class=\"\">argamassa de mistura seca<\/span><\/strong><span class=\"\">\u00a0n\u00e3o se deve contar com revestimentos de membrana aplicados posteriormente como uma \u201crede de seguran\u00e7a\u201d, mas sim com a incorpora\u00e7\u00e3o das propriedades funcionais j\u00e1 na fase de concep\u00e7\u00e3o da formula\u00e7\u00e3o. O p\u00f3 de pol\u00edmero hidrof\u00f3bico redispers\u00e1vel, por meio da a\u00e7\u00e3o sin\u00e9rgica de\u00a0<\/span><strong><span class=\"\">forma\u00e7\u00e3o de pel\u00edcula f\u00edsica, ancoragem qu\u00edmica e modifica\u00e7\u00e3o interfacial<\/span><\/strong><span class=\"\">, confere \u00e0 argamassa uma capacidade de impermeabiliza\u00e7\u00e3o aut\u00f4noma duradoura e confi\u00e1vel, sem comprometer a praticidade da constru\u00e7\u00e3o. Isso representa n\u00e3o apenas uma op\u00e7\u00e3o t\u00e9cnica para o aprimoramento do desempenho, mas tamb\u00e9m uma mudan\u00e7a fundamental na filosofia do produto \u2014 da \u201crepara\u00e7\u00e3o passiva\u201d para a \u201cimpermeabilidade ativa\u201d.<\/span><\/p><p class=\"ds-markdown-paragraph\"><a href=\"https:\/\/tenessy.com\/hpmc-supplier\/\"><strong><span class=\"\">TENESSIA<\/span><\/strong><\/a><span class=\"\">\u00a0est\u00e1 empenhada em promover\u00a0<\/span><strong><span class=\"\">aditivos impermeabilizantes para argamassa<\/span><\/strong><span class=\"\">. Oferecemos n\u00e3o apenas p\u00f3s de pol\u00edmeros hidrof\u00f3bicos de alto desempenho, mas tamb\u00e9m solu\u00e7\u00f5es abrangentes que incluem o projeto de formula\u00e7\u00f5es, a adapta\u00e7\u00e3o de processos e o controle de qualidade da produ\u00e7\u00e3o. Optar por promover mudan\u00e7as na origem \u00e9 a \u00fanica maneira de garantir que cada lote de\u00a0<\/span><strong><span class=\"\">argamassa de mistura seca<\/span><\/strong><span class=\"\">\u00a0resiste aos dois desafios: a \u00e1gua e o tempo.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>Em in\u00fameros casos de reparo, o caminho pela qual a \u00e1gua penetra muitas vezes n\u00e3o s\u00e3o as fissuras estruturais, mas sim a conectividade capilar inerente, as fissuras por retra\u00e7\u00e3o de secagem ou a falha de ader\u00eancia interfacial dentro da pr\u00f3pria argamassa seca.<\/p>","protected":false},"author":1,"featured_media":14853,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[35],"tags":[],"class_list":["post-14833","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industry-news"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.7 - 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