{"id":21462,"date":"2025-03-08T10:08:46","date_gmt":"2025-03-08T02:08:46","guid":{"rendered":"https:\/\/landu-china.com\/?p=21462"},"modified":"2025-03-08T10:49:22","modified_gmt":"2025-03-08T02:49:22","slug":"het-verschil-begrijpen-tussen-polycarboxylaat-en-traditionele-superweekmaker","status":"publish","type":"post","link":"https:\/\/landu-china.com\/nl\/het-verschil-begrijpen-tussen-polycarboxylaat-en-traditionele-superweekmaker\/","title":{"rendered":"Het verschil begrijpen tussen polycarboxylaat en traditionele superweekmaker"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"21462\" class=\"elementor elementor-21462\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-8ed4792 e-flex e-con-boxed e-con e-parent\" data-id=\"8ed4792\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;,&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-27bb47c5 e-con-full e-flex e-con e-child\" data-id=\"27bb47c5\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;,&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5745a1aa elementor-widget elementor-widget-heading\" data-id=\"5745a1aa\" 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<h1 class=\"elementor-heading-title elementor-size-default\">Het verschil begrijpen tussen polycarboxylaat en traditionele superweekmaker<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5f276119 elementor-tablet-align-center elementor-widget elementor-widget-post-info\" data-id=\"5f276119\" data-element_type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"post-info.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<ul class=\"elementor-inline-items elementor-icon-list-items elementor-post-info\">\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item elementor-repeater-item-8a4e3ed elementor-inline-item\" itemprop=\"datePublished\">\n\t\t\t\t\t\t<a href=\"https:\/\/landu-china.com\/nl\/2025\/03\/08\/\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-far-calendar\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M400 64h-48V12c0-6.6-5.4-12-12-12h-40c-6.6 0-12 5.4-12 12v52H160V12c0-6.6-5.4-12-12-12h-40c-6.6 0-12 5.4-12 12v52H48C21.5 64 0 85.5 0 112v352c0 26.5 21.5 48 48 48h352c26.5 0 48-21.5 48-48V112c0-26.5-21.5-48-48-48zm-6 400H54c-3.3 0-6-2.7-6-6V160h352v298c0 3.3-2.7 6-6 6z\"><\/path><\/svg>\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text elementor-post-info__item elementor-post-info__item--type-date\">\n\t\t\t\t\t\t\t\t\t\t<time>maart 8, 2025<\/time>\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t<\/li>\n\t\t\t\t<\/ul>\n\t\t\t\t\t\t<\/div>\n\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<section class=\"elementor-section elementor-top-section elementor-element elementor-element-271dd1a elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"271dd1a\" data-element_type=\"section\" data-settings=\"{&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<main class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-2d5bb40\" data-id=\"2d5bb40\" data-element_type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-5364865 elementor-widget elementor-widget-text-editor\" data-id=\"5364865\" 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>Waterreduceermiddel is een onmisbaar bestanddeel in de moderne betonbereiding. Het wordt voornamelijk gebruikt om:<\/p><ul><li>Verminder het waterverbruik met behoud van het cementgehalte en de vloeibaarheid van het beton, waardoor de betonsterkte toeneemt.<\/li><li>Verhoog de vloeibaarheid terwijl het cement- en watergehalte ongewijzigd blijven.<\/li><\/ul><p>Dit artikel gaat over het verschil tussen traditionele en <a href=\"https:\/\/landu-china.com\/nl\/polycarboxylaat-superplasticeermiddel-poeder-pce\/\">Polycarboxylaat superweekmakers<\/a>.<\/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-62b5b46 elementor-widget elementor-widget-heading\" data-id=\"62b5b46\" 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\">Traditionele waterreductoren en hun beperkingen<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-ade00fa e-con-full e-flex e-con e-child\" data-id=\"ade00fa\" 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-79c522b elementor-widget elementor-widget-text-editor\" data-id=\"79c522b\" 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>De ontwikkeling van waterreductiemiddelen heeft drie hoofdfasen doorlopen:<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-e1d4bbc e-flex e-con-boxed e-con e-child\" data-id=\"e1d4bbc\" 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<div class=\"elementor-element elementor-element-dca86f5 e-con-full e-flex e-con e-child\" data-id=\"dca86f5\" 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-227d846 elementor-widget elementor-widget-heading\" data-id=\"227d846\" 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. Gewone waterverlagers<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e1fa3e9 elementor-widget elementor-widget-text-editor\" data-id=\"e1fa3e9\" 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>De eerste generatie waterreductiemiddelen, gewone waterreductiemiddelen zoals natriumharsinaat, calciumlignosulfonaat en natriumlignosulfonaat, kwamen op in de jaren 1930, maar hadden een lage waterreductiesnelheid (over het algemeen lager dan 12%).<\/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-1179bf4 elementor-widget elementor-widget-heading\" data-id=\"1179bf4\" 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. Hoogeffici\u00ebnte waterreduceers<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-651d4ab elementor-widget elementor-widget-text-editor\" data-id=\"651d4ab\" 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>Toen de vraag van ingenieurs naar hogere waterreductiesnelheden toenam, werd in de jaren 1960 met succes de tweede generatie hoogrendementswaterreductiemiddelen ontwikkeld, zoals waterreductiemiddelen op basis van naftaleen en melamine. Deze boden hogere waterreductiesnelheden (14%-25%) en een verbeterde sterkteverbetering, maar konden de slump van vers gemengd beton niet handhaven.<\/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-4ece3a5 elementor-widget elementor-widget-heading\" data-id=\"4ece3a5\" 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. Waterreductoren met hoge prestaties<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0005beb elementor-widget elementor-widget-text-editor\" data-id=\"0005beb\" 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>Om deze beperking aan te pakken werd halverwege de jaren 1980 de derde generatie - polycarboxylaat superweekmakers - ontwikkeld. Hoogwaardige waterreductiemiddelen vertonen hoge waterreductiesnelheden, een uitstekend behoud van de slump, superieure sterkteverbetering en lage krimp. Bovendien kan hun functionaliteit worden aangepast door de moleculaire structuur te wijzigen of nieuwe functionele groepen toe te voegen, dankzij hun zeer ontwerpbare moleculaire structuur.<\/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\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6fade18 elementor-widget elementor-widget-heading\" data-id=\"6fade18\" 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\">Wat is een polycarboxylaat superweekmaker?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-85a1ce6 e-flex e-con-boxed e-con e-parent\" data-id=\"85a1ce6\" 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<div class=\"elementor-element elementor-element-758ea3c e-con-full e-flex e-con e-child\" data-id=\"758ea3c\" 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-01171c1 elementor-widget elementor-widget-text-editor\" data-id=\"01171c1\" 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><a href=\"https:\/\/landu-china.com\/nl\/polycarboxylaat-superplasticeermiddel-poeder-pce\/\">Polycarboxylaat Superweekmaker<\/a> is een innovatief additief dat wordt gesynthetiseerd door copolymerisatie van onverzadigde monomeren onder invloed van initiatoren, waarbij zijketens met actieve groepen op de polymeerruggengraat worden ge\u00ebnt. Dit resulteert in een product met een hoge effici\u00ebntie, gecontroleerd instortverlies, weerstand tegen krimpen en geen nadelige effecten op de uitharding en verharding van cement. Sterk presterende waterreductiemiddelen op basis van polycarboxylaat verschillen fundamenteel van naftaleensulfonaatformaldehyde (NSF) en melamine-sulfonaatformaldehyde (MSF) waterreductiemiddelen. Zelfs bij lage doseringen geven ze mortel en beton een hoge vloeibaarheid en een lage viscositeit en behouden ze de prestaties van slump bij lage water-cementverhoudingen. Ze vertonen een relatief betere compatibiliteit met verschillende soorten cement en zijn onmisbare materialen voor beton met hoge sterkte en hoge vloeibaarheid.<\/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-6d774f3 e-con-full e-flex e-con e-child\" data-id=\"6d774f3\" 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-ff971be elementor-widget elementor-widget-image\" data-id=\"ff971be\" 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=\"533\" src=\"https:\/\/landu-china.com\/wp-content\/uploads\/2024\/11\/DSC4280-\u62f7\u8d1d.webp\" class=\"attachment-large size-large wp-image-19104\" alt=\"PCE\" srcset=\"https:\/\/landu-china.com\/wp-content\/uploads\/2024\/11\/DSC4280-\u62f7\u8d1d.webp 800w, https:\/\/landu-china.com\/wp-content\/uploads\/2024\/11\/DSC4280-\u62f7\u8d1d-300x200.webp 300w, https:\/\/landu-china.com\/wp-content\/uploads\/2024\/11\/DSC4280-\u62f7\u8d1d-768x512.webp 768w\" 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>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-24d4d6f elementor-widget elementor-widget-heading\" data-id=\"24d4d6f\" 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\">Verschillen tussen traditionele en polycarboxylaat superweekmakers\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3b5e289 elementor-widget elementor-widget-html\" data-id=\"3b5e289\" data-element_type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"html.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<!DOCTYPE html>\r\n<html lang=\"en\">\r\n<head>\r\n    <meta charset=\"UTF-8\">\r\n    <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">\r\n    <title>Superweekmaker Vergelijking<\/title>\r\n    <style>\r\n        table {\r\n            width: 80%;\r\n            border-collapse: collapse;\r\n            margin: 20px auto;\r\n            font-family: Arial, sans-serif;\r\n        }\r\n        th, td {\r\n            border: 1px solid black;\r\n            padding: 8px;\r\n            text-align: left;\r\n        }\r\n        th {\r\n            background-color: #f2f2f2;\r\n        }\r\n        tr:nth-child(even) {\r\n            background-color: #f9f9f9;\r\n        }\r\n    <\/style>\r\n<\/head>\r\n<body>\r\n    <table>\r\n        <tr>\r\n            <th><\/th>\r\n            <th>Traditionele Superplasticizer<\/th>\r\n            <th>Polycarboxylaat Superweekmaker<\/th>\r\n        <\/tr>\r\n        <tr>\r\n            <td>Dispersiemechanisme<\/td>\r\n            <td>Elektrostatische afstoting<\/td>\r\n            <td>Elektrostatische afstoting en sterische effecten<\/td>\r\n        <\/tr>\r\n        <tr>\r\n            <td>Water Reductie<\/td>\r\n            <td>15-25%<\/td>\r\n            <td>tot 40%<\/td>\r\n        <\/tr>\r\n        <tr>\r\n            <td>Behoud van instorten<\/td>\r\n            <td>binnen 30-60 minuten<\/td>\r\n            <td>tot 2 uur<\/td>\r\n        <\/tr>\r\n        <tr>\r\n            <td>Milieu-impact<\/td>\r\n            <td>Bevatten formaldehyde en andere chemicali\u00ebn<\/td>\r\n            <td>Formaldehydevrij<\/td>\r\n        <\/tr>\r\n        <tr>\r\n            <td>Compatibiliteit<\/td>\r\n            <td>Incompatibiliteitsproblemen<\/td>\r\n            <td>Zeer compatibel met verschillende additieven<\/td>\r\n        <\/tr>\r\n    <\/table>\r\n<\/body>\r\n<\/html>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6a3140f elementor-widget elementor-widget-text-editor\" data-id=\"6a3140f\" 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>Samengevat biedt Polycarboxylaat Superplasticizer in vergelijking met traditionele waterreductiemiddelen de volgende voordelen:<\/p><ol><li>Hoog waterreductiepercentage: Waterreductiesnelheden kunnen oplopen tot 25-40%.<\/li><li>Sterke groeisnelheid: Aanzienlijk verbeterde sterkte, vooral in het beginstadium van krachtontwikkeling.<\/li><li>Uitstekend behoud van klonters: Uitzonderlijk klontvast zorgt voor minimaal klontverlies na verloop van tijd.<\/li><li>Superieure homogeniteit: Geeft het beton een uitstekende vloeibaarheid, wat het storten en verdichten vergemakkelijkt, geschikt voor zelfnivellerend en zelfverdichtend beton.<\/li><li>Controleerbare productie: Aanpassingen in het moleculaire gewicht van het polymeer, de lengte van de zijketen, de dichtheid en het type zijketengroepen maken waterreductiesnelheden, het behoud van de drempelwaarde en luchtbelemmerende eigenschappen op maat mogelijk.<\/li><li>Brede compatibiliteit: Vertoont een goede dispergeerbaarheid en schuimretentie met verschillende cementsoorten, waaronder gewoon portlandcement, slakkencement en gemengd cement.<\/li><li>Lage krimp: Verbetert de volumestabiliteit en vermindert de krimp op 28 dagen met ongeveer 20% in vergelijking met waterreductiemiddelen op naftaleenbasis, waardoor het risico op barsten wordt beperkt.<\/li><li>Milieuvriendelijk: Niet-giftig, niet-corrosief en vrij van formaldehyde en andere schadelijke bestanddelen.<\/li><\/ol>\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-a54d643 elementor-widget elementor-widget-heading\" data-id=\"a54d643\" 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\">Extra uitleg<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f62b580 elementor-widget elementor-widget-text-editor\" data-id=\"f62b580\" 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><a href=\"https:\/\/landu-china.com\/nl\/polycarboxylaat-superplasticeermiddel-poeder-pce\/\">Hoogwaardige waterreductiemiddelen op basis van polycarboxylaat<\/a> worden ontworpen op basis van moleculaire structuurprincipes, gebruikmakend van de DLVO ladingsafstotingstheorie en de sterische hindernistheorie. Actieve groepen met verschillende functionaliteiten worden ge\u00ebnt op de hoofdketen en vormen zo het polymeer. De hoofdketen van de polycarboxylaatmolecule adsorbeert stevig aan het oppervlak van cementdeeltjes, waardoor hydratatie effectief wordt verhinderd en het instorten beter wordt vastgehouden, terwijl de zijketens de cementdeeltjes omringen en zorgen voor zowel sterische hinder als elektrostatische afstoting. Dit mechanisme, dat verschilt van de elektrostatische afstoting die door traditionele waterreductiemiddelen wordt gebruikt om cementdeeltjes te dispergeren, resulteert in een superieure dispergeerbaarheid en waterreductie, wat uiteindelijk de algehele prestaties van mortel- en betonproducten verbetert.<\/p><p>Polycarboxylaatwaterreductiemiddelen worden gesynthetiseerd via polymerisatie in waterige oplossingen met vrije radicalen, bevatten minimale chloride-ionen en vereisen slechts een kleine hoeveelheid alkali voor neutralisatie, wat resulteert in een zeer laag alkaligehalte. Het alkaligehalte van waterreductiemiddelen op basis van naftaleen varieert daarentegen aanzienlijk door verschillen in sulfonatieprocessen.<\/p><p>Alkali is een primaire factor in alkali-aggregaatreacties (AAR), die wereldwijd talrijke gevallen van betonaantasting hebben veroorzaakt. Alkali in beton is voornamelijk afkomstig van cement, vliegas, waterreductiemiddelen en andere grondstoffen. Wereldwijd wordt er veel nadruk gelegd op het beheersen van het alkaligehalte. Bijvoorbeeld:<\/p><ol><li>Zuid-Afrika stelt een maximaal totaal alkaligehalte van 2,1 kg\/m\u00b3 verplicht.<\/li><li>Het Three Gorges Project in China beperkt het tot 2,5 kg\/m\u00b3.<\/li><li>De Verenigde Staten beperken het tot 3,3 kg\/m\u00b3.<\/li><\/ol><p>Als een van de vijf essenti\u00eble bestanddelen van beton heeft het alkaligehalte van waterreductiemiddelen, met name Na2SO4, een directe invloed op het totale alkaligehalte van beton. Als gevolg van productieprocessen waarbij geconcentreerd zwavelzuur wordt gezwaveld en natriumhydroxide wordt geneutraliseerd, bevatten sommige waterreductiemiddelen op basis van naftaleen Na2SO4-gehaltes tot 30%, met de meeste rond 10% en een chloride-iongehalte dat meestal hoger is dan 0,3% of hoger. Waterreductiemiddelen op basis van polycarboxylaat daarentegen worden gesynthetiseerd via polymerisatie in een waterige oplossing zonder sulfonering, waarbij slechts een minimale hoeveelheid natriumhydroxide nodig is voor pH-aanpassing, wat resulteert in een verwaarloosbaar gehalte aan alkali- en chloride-ionen. Dit verbetert de duurzaamheid van mortel en beton aanzienlijk en maakt waterreductiemiddelen op basis van polycarboxylaat tot essenti\u00eble componenten voor de productie van groen, hoogwaardig beton.<\/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-718fb18 elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"718fb18\" data-element_type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-47af679 elementor-share-buttons--shape-rounded elementor-grid-4 elementor-grid-mobile-2 elementor-share-buttons--view-icon-text elementor-share-buttons--skin-gradient 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101.255c-9.335-9.379-9.317-24.544.04-33.901l22.667-22.667c9.373-9.373 24.569-9.373 33.941 0L285.475 239.03c9.373 9.372 9.373 24.568.001 33.941z\\&quot;&gt;&lt;\\\/path&gt;&lt;\\\/svg&gt;&quot;},&quot;motion_fx_motion_fx_mouse&quot;:&quot;yes&quot;,&quot;sticky&quot;:&quot;top&quot;,&quot;no_headings_message&quot;:&quot;No headings were found on this page.&quot;,&quot;hierarchical_view&quot;:&quot;yes&quot;,&quot;min_height&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;min_height_tablet&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;min_height_mobile&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;ekit_we_effect_on&quot;:&quot;none&quot;,&quot;sticky_on&quot;:[&quot;desktop&quot;,&quot;tablet&quot;,&quot;mobile&quot;],&quot;sticky_offset&quot;:0,&quot;sticky_effects_offset&quot;:0,&quot;sticky_anchor_link_offset&quot;:0}\" data-widget_type=\"table-of-contents.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-toc__header\">\n\t\t\t<h3 class=\"elementor-toc__header-title\">\n\t\t\t\tSnelle links\t\t\t<\/h3>\n\t\t\t\t\t<\/div>\n\t\t<div id=\"elementor-toc__5f5a091\" class=\"elementor-toc__body\">\n\t\t\t<div class=\"elementor-toc__spinner-container\">\n\t\t\t\t<svg class=\"elementor-toc__spinner eicon-animation-spin e-font-icon-svg e-eicon-loading\" aria-hidden=\"true\" viewbox=\"0 0 1000 1000\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M500 975V858C696 858 858 696 858 500S696 142 500 142 142 304 142 500H25C25 237 238 25 500 25S975 237 975 500 763 975 500 975Z\"><\/path><\/svg>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>Het verschil begrijpen tussen polycarboxylaat en traditionele superweekmaker Waterreduceermiddel is een onmisbaar onderdeel in de moderne betonbereiding. Het wordt voornamelijk gebruikt om: Het waterverbruik te verminderen met behoud van het cementgehalte en de vloeibaarheid van beton, waardoor de betonsterkte toeneemt. De vloeibaarheid te verhogen terwijl het cement- en watergehalte ongewijzigd blijven. Dit artikel gaat over het verschil tussen [...]<\/p>","protected":false},"author":1,"featured_media":21474,"comment_status":"open","ping_status":"open","sticky":false,"template":"elementor_header_footer","format":"standard","meta":{"footnotes":""},"categories":[15],"tags":[14],"class_list":["post-21462","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-construction-insights","tag-construction"],"_links":{"self":[{"href":"https:\/\/landu-china.com\/nl\/wp-json\/wp\/v2\/posts\/21462","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/landu-china.com\/nl\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/landu-china.com\/nl\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/landu-china.com\/nl\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/landu-china.com\/nl\/wp-json\/wp\/v2\/comments?post=21462"}],"version-history":[{"count":10,"href":"https:\/\/landu-china.com\/nl\/wp-json\/wp\/v2\/posts\/21462\/revisions"}],"predecessor-version":[{"id":21473,"href":"https:\/\/landu-china.com\/nl\/wp-json\/wp\/v2\/posts\/21462\/revisions\/21473"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/landu-china.com\/nl\/wp-json\/wp\/v2\/media\/21474"}],"wp:attachment":[{"href":"https:\/\/landu-china.com\/nl\/wp-json\/wp\/v2\/media?parent=21462"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/landu-china.com\/nl\/wp-json\/wp\/v2\/categories?post=21462"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/landu-china.com\/nl\/wp-json\/wp\/v2\/tags?post=21462"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}