{"id":6832,"date":"2026-08-20T15:49:47","date_gmt":"2026-08-20T13:49:47","guid":{"rendered":"https:\/\/www.procertus.be\/?p=6832"},"modified":"2026-08-20T16:05:26","modified_gmt":"2026-08-20T14:05:26","slug":"interlabocampagne-vliegas-2023-2025","status":"publish","type":"post","link":"https:\/\/www.procertus.be\/nl\/interlabocampagne-vliegas-2023-2025\/","title":{"rendered":"Interlabocampagne vliegas 2023\u20132025"},"content":{"rendered":"<div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-1 fusion-flex-container nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-flex-wrap:wrap;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-flex-start fusion-flex-content-wrap\" style=\"max-width:1456px;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-0 fusion_builder_column_1_1 1_1 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:0px;--awb-spacing-right-large:1.92%;--awb-margin-bottom-large:0px;--awb-spacing-left-large:1.92%;--awb-width-medium:100%;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-text fusion-text-1\"><p>Betrouwbare testresultaten zijn de basis van elke kwaliteitsverklaring voor vliegas in beton. Daarom organiseerden PROCERTUS en KIWA van november 2023 tot oktober 2025 een nieuwe Interlaboratoriumcampagne Vliegas. Deze campagne is al meer dan 10 jaar een vaste waarde in de sector en biedt laboratoria een objectieve referentie voor hun prestaties.<\/p>\n<h3 aria-level=\"1\">Wat is de Interlabocampagne Vliegas?<\/h3>\n<p><span data-contrast=\"auto\">Laboratoria ontvangen referentiemonsters van cement en vliegas,\u00a0beide\u00a0afkomstig uit eenzelfde batch. Ze verwerken deze monsters in hun\u00a0<\/span><b><span data-contrast=\"auto\">normale\u00a0testroutine<\/span><\/b><span data-contrast=\"auto\">, zonder voorkeursbehandeling.\u00a0De campagne volgt\u00a0namelijk\u00a0een\u00a0<\/span><b><span data-contrast=\"auto\">Round\u00a0Robin-opzet<\/span><\/b><span data-contrast=\"auto\">: elk monster wordt door alle deelnemende laboratoria meerdere keren getest. Zo ontstaat een realistisch en\u00a0<\/span><b><span data-contrast=\"auto\">vergelijkbaar beeld van de dagelijkse werking<\/span><\/b><span data-contrast=\"auto\">, en kunnen prestaties over laboratoria heen\u00a0<\/span><b><span data-contrast=\"auto\">objectief\u00a0worden\u00a0beoordeeld<\/span><\/b><span data-contrast=\"auto\">.<\/span><span data-ccp-props=\"\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"auto\">De voordelen voor de deelnemers:<\/span><span data-ccp-props=\"\">\u00a0<\/span><\/p>\n<ul>\n<li aria-setsize=\"-1\" data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"5\" data-list-defn-props=\"{\" data-aria-posinset=\"1\" data-aria-level=\"1\"><span data-contrast=\"auto\">Continue monitoring van prestaties\u00a0<\/span><span data-ccp-props=\"{\">\u00a0<\/span><\/li>\n<\/ul>\n<ul>\n<li aria-setsize=\"-1\" data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"5\" data-list-defn-props=\"{\" data-aria-posinset=\"2\" data-aria-level=\"1\"><span data-contrast=\"auto\">Vergelijking met andere gespecialiseerde laboratoria\u00a0<\/span><span data-ccp-props=\"{\">\u00a0<\/span><\/li>\n<\/ul>\n<ul>\n<li aria-setsize=\"-1\" data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"5\" data-list-defn-props=\"{\" data-aria-posinset=\"3\" data-aria-level=\"1\"><span data-contrast=\"auto\">Tijdig opsporen van afwijkingen of verbeterpunten\u00a0in hun laboratoria<\/span><span data-ccp-props=\"{\">\u00a0<\/span><\/li>\n<\/ul>\n<p><span data-contrast=\"auto\">Ook voor certificatie-instellingen en gebruikers\u00a0die niet hebben deelgenomen,\u00a0biedt het rapport inzicht in de\u00a0<\/span><b><span data-contrast=\"auto\">betrouwbaarheid van testresultaten<\/span><\/b><span data-contrast=\"auto\">\u00a0en de consistentie van analyses.<\/span><\/p>\n<h3 aria-level=\"1\">Wat werd getest?<\/h3>\n<p>Tijdens de interlabocampagne hebben de laboratoria zowel chemische als mechanische eigenschappen van vliegas onderzocht. De selectie van deze eigenschappen is gebaseerd op Europese normen en ervaring met betontoepassingen, zodat de resultaten direct relevant zijn voor kwaliteit en certificatie.<\/p>\n<p>Chemische eigenschappen:<\/p>\n<ul>\n<li>O.a. de bepaling van het gehalte aan SO\u2083, Na\u2082O, K\u2082O en andere elementen die invloed hebben op de eigenschappen van vliegas<\/li>\n<li>Het gloeiverlies ( Loss on ignition LoI) om het gehalte aan organisch materiaal te bepalen<\/li>\n<\/ul>\n<p>Deze kenmerken zijn belangrijk omdat ze direct invloed hebben op de prestaties van beton, zoals sterkteontwikkeling, chemische stabiliteit en duurzaamheid.<\/p>\n<p>Mechanische eigenschappen:<\/p>\n<ul>\n<li>Druksterkte na 28 en 90 dagen<\/li>\n<li>Activiteitsindex (hoe actief de vliegas reageert in combinatie met cement)<\/li>\n<li>Fijnheid<\/li>\n<li>Initi\u00eble bindingstijd<\/li>\n<li>Volumieke massa (dichtheid)<\/li>\n<\/ul>\n<h3 aria-level=\"1\">Belangrijkste bevindingen<\/h3>\n<p><span class=\"TextRun SCXW105139306 BCX0\" lang=\"NL-BE\" xml:lang=\"NL-BE\" data-contrast=\"auto\"><span class=\"NormalTextRun CommentStart SCXW105139306 BCX0\">Enkele gemiddelde<\/span><span class=\"NormalTextRun SCXW105139306 BCX0\">n\u00a0<\/span><span class=\"NormalTextRun SCXW105139306 BCX0\">bekomen\u00a0<\/span><span class=\"NormalTextRun SCXW105139306 BCX0\">tijdens de\u00a0<\/span><span class=\"NormalTextRun SpellingErrorV2Themed SCXW105139306 BCX0\">in<\/span><\/span><span class=\"TrackChangeTextInsertion TrackedChange SCXW105139306 BCX0\"><span class=\"TextRun SCXW105139306 BCX0\" lang=\"NL-BE\" xml:lang=\"NL-BE\" data-contrast=\"auto\"><span class=\"NormalTextRun SpellingErrorV2Themed SCXW105139306 BCX0\">t<\/span><\/span><\/span><span class=\"TextRun SCXW105139306 BCX0\" lang=\"NL-BE\" xml:lang=\"NL-BE\" data-contrast=\"auto\"><span class=\"NormalTextRun SpellingErrorV2Themed SCXW105139306 BCX0\">erlaboratoriumcampagne<\/span><span class=\"NormalTextRun SCXW105139306 BCX0\">\u00a0zijn\u00a0<\/span><span class=\"NormalTextRun SCXW105139306 BCX0\">weergegeven in onderstaande tabel.<\/span><\/span><span class=\"EOP Selected SCXW105139306 BCX0\" data-ccp-props=\"\">\u00a0<\/span><\/p>\n<\/div>\n<div class=\"table-2\" style=\"--awb-margin-bottom:5%;\">\n<table width=\"100%\">\n<thead>\n<tr>\n<th align=\"left\"><span class=\"TrackChangeTextInsertion TrackedChange SCXW162344912 BCX0\"><span class=\"TextRun SCXW162344912 BCX0\" lang=\"EN-US\" xml:lang=\"EN-US\" data-contrast=\"auto\"><span class=\"NormalTextRun SpellingErrorV2Themed SCXW162344912 BCX0\">Eigenschap<\/span><\/span><\/span><span class=\"EOP TrackedChange SCXW162344912 BCX0\" data-ccp-props=\"{}\">\u00a0<\/span><\/th>\n<th align=\"left\"><span class=\"TrackChangeTextInsertion TrackedChange SCXW177129628 BCX0\"><span class=\"TextRun SCXW177129628 BCX0\" lang=\"EN-US\" xml:lang=\"EN-US\" data-contrast=\"auto\"><span class=\"NormalTextRun SpellingErrorV2Themed SCXW177129628 BCX0\">Gemiddelde<\/span><\/span><\/span><span class=\"EOP TrackedChange SCXW177129628 BCX0\" data-ccp-props=\"{}\">\u00a0<\/span><\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td align=\"left\"><span class=\"TextRun SCXW163451806 BCX0\" lang=\"EN-US\" xml:lang=\"EN-US\" data-contrast=\"auto\"><span class=\"NormalTextRun SpellingErrorV2Themed SCXW163451806 BCX0\">Druksterkte<\/span><span class=\"NormalTextRun SCXW163451806 BCX0\">\u00a0(28\u00a0<\/span><span class=\"NormalTextRun SpellingErrorV2Themed SCXW163451806 BCX0\">dagen<\/span><span class=\"NormalTextRun SCXW163451806 BCX0\">)<\/span><\/span><span class=\"EOP Selected SCXW163451806 BCX0\" data-ccp-props=\"{}\">\u00a0<\/span><\/td>\n<td align=\"left\"><span class=\"TextRun SCXW100800228 BCX0\" data-contrast=\"auto\"><span class=\"NormalTextRun SCXW100800228 BCX0\">56,5 MPa<\/span><\/span><span class=\"EOP SCXW100800228 BCX0\" data-ccp-props=\"{}\">\u00a0<\/span><\/td>\n<\/tr>\n<tr>\n<td align=\"left\"><span class=\"TextRun SCXW250459993 BCX0\" lang=\"EN-US\" xml:lang=\"EN-US\" data-contrast=\"auto\"><span class=\"NormalTextRun SpellingErrorV2Themed SCXW250459993 BCX0\">Druksterkte<\/span><span class=\"NormalTextRun SCXW250459993 BCX0\">\u00a0(90\u00a0<\/span><span class=\"NormalTextRun SpellingErrorV2Themed SCXW250459993 BCX0\">dagen<\/span><span class=\"NormalTextRun SCXW250459993 BCX0\">)<\/span><\/span><span class=\"EOP Selected SCXW250459993 BCX0\" data-ccp-props=\"{}\">\u00a0<\/span><\/td>\n<td align=\"left\"><span class=\"TextRun SCXW242395668 BCX0\" data-contrast=\"auto\"><span class=\"NormalTextRun SCXW242395668 BCX0\">71,8 MPa<\/span><\/span><span class=\"EOP SCXW242395668 BCX0\" data-ccp-props=\"{}\">\u00a0<\/span><\/td>\n<\/tr>\n<tr>\n<td align=\"left\"><span class=\"TextRun SCXW67398798 BCX0\" lang=\"EN-US\" xml:lang=\"EN-US\" data-contrast=\"auto\"><span class=\"NormalTextRun SpellingErrorV2Themed SCXW67398798 BCX0\">Activiteitsindex<\/span><span class=\"NormalTextRun SCXW67398798 BCX0\">\u00a0(28\u00a0<\/span><span class=\"NormalTextRun SpellingErrorV2Themed SCXW67398798 BCX0\">dagen<\/span><span class=\"NormalTextRun SCXW67398798 BCX0\">)<\/span><\/span><span class=\"EOP SCXW67398798 BCX0\" data-ccp-props=\"{}\">\u00a0<\/span><\/td>\n<td align=\"left\"><span class=\"TextRun SCXW200401889 BCX0\" data-contrast=\"auto\"><span class=\"NormalTextRun SCXW200401889 BCX0\">80,9 %<\/span><\/span><span class=\"EOP SCXW200401889 BCX0\" data-ccp-props=\"{}\">\u00a0<\/span><\/td>\n<\/tr>\n<tr>\n<td align=\"left\"><span class=\"TextRun SCXW67398798 BCX0\" lang=\"EN-US\" xml:lang=\"EN-US\" data-contrast=\"auto\"><span class=\"NormalTextRun SpellingErrorV2Themed SCXW67398798 BCX0\">Activiteitsindex<\/span><span class=\"NormalTextRun SCXW67398798 BCX0\"> (90 <\/span><span class=\"NormalTextRun SpellingErrorV2Themed SCXW67398798 BCX0\">dagen<\/span><span class=\"NormalTextRun SCXW67398798 BCX0\">)<\/span><\/span><span class=\"EOP SCXW67398798 BCX0\" data-ccp-props=\"{}\">\u00a0<\/span><\/td>\n<td align=\"left\"><span class=\"TextRun SCXW241082000 BCX0\" data-contrast=\"auto\"><span class=\"NormalTextRun SCXW241082000 BCX0\">93,5 %<\/span><\/span><span class=\"EOP SCXW241082000 BCX0\" data-ccp-props=\"{}\">\u00a0<\/span><\/td>\n<\/tr>\n<tr>\n<td align=\"left\"><span class=\"TextRun SCXW94798336 BCX0\" lang=\"EN-US\" xml:lang=\"EN-US\" data-contrast=\"auto\"><span class=\"NormalTextRun SpellingErrorV2Themed SCXW94798336 BCX0\">Initi\u00eble<\/span><span class=\"NormalTextRun SCXW94798336 BCX0\">\u00a0<\/span><span class=\"NormalTextRun SpellingErrorV2Themed SCXW94798336 BCX0\">bindingstijd<\/span><\/span><span class=\"EOP SCXW94798336 BCX0\" data-ccp-props=\"{}\">\u00a0<\/span><\/td>\n<td align=\"left\"><span class=\"TextRun SCXW250679793 BCX0\" data-contrast=\"auto\"><span class=\"NormalTextRun SCXW250679793 BCX0\">153 min<\/span><\/span><span class=\"EOP SCXW250679793 BCX0\" data-ccp-props=\"{}\">\u00a0<\/span><\/td>\n<\/tr>\n<tr>\n<td align=\"left\"><span class=\"TextRun SCXW145799115 BCX0\" lang=\"EN-US\" xml:lang=\"EN-US\" data-contrast=\"auto\"><span class=\"NormalTextRun SpellingErrorV2Themed SCXW145799115 BCX0\">Dichtheid<\/span><\/span><span class=\"EOP SCXW145799115 BCX0\" data-ccp-props=\"{}\">\u00a0<\/span><\/td>\n<td align=\"left\"><span class=\"TextRun SCXW91510110 BCX0\" lang=\"EN-US\" xml:lang=\"EN-US\" data-contrast=\"auto\"><span class=\"NormalTextRun SCXW91510110 BCX0\">2336 kg<\/span><span class=\"NormalTextRun SCXW91510110 BCX0\">\/m\u00b3<\/span><\/span><span class=\"EOP SCXW91510110 BCX0\" data-ccp-props=\"{}\">\u00a0<\/span><\/td>\n<\/tr>\n<tr>\n<td align=\"left\"><span class=\"TextRun SCXW72218004 BCX0\" lang=\"EN-US\" xml:lang=\"EN-US\" data-contrast=\"auto\"><span class=\"NormalTextRun SpellingErrorV2Themed SCXW72218004 BCX0\">Fijnheid<\/span><\/span><span class=\"EOP SCXW72218004 BCX0\" data-ccp-props=\"{}\">\u00a0<\/span><\/td>\n<td align=\"left\"><span class=\"TextRun SCXW69427701 BCX0\" data-contrast=\"auto\"><span class=\"NormalTextRun SCXW69427701 BCX0\">16,7 %<\/span><\/span><span class=\"EOP SCXW69427701 BCX0\" data-ccp-props=\"{}\">\u00a0<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<div class=\"fusion-text fusion-text-2\"><p><span data-contrast=\"auto\">Ook chemische parameters zoals\u00a0CaO,\u00a0SiO\u2082 en\u00a0Al\u2082O\u2083 lagen binnen een smalle bandbreedte, wat wijst op goede reproduceerbaarheid tussen laboratoria.\u00a0<\/span><span data-ccp-props=\"\">\u00a0<\/span><span data-contrast=\"auto\">Afwijkingen of uitschieters werden op een transparante manier verwerkt, ondersteund door statistische methoden zoals\u00a0z-scores en de\u00a0Grubbs-outlieranalyse.<\/span><span data-ccp-props=\"\">\u00a0<\/span><\/p>\n<h3 aria-level=\"3\">De rol van PROCERTUS<\/h3>\n<p><span data-contrast=\"auto\">PROCERTUS co\u00f6rdineert de campagne, verwerkt de resultaten\u00a0<\/span><b><span data-contrast=\"auto\">vertrouwelijk en anoniem<\/span><\/b><span data-contrast=\"auto\">, en biedt technische duiding.\u00a0De\u00a0interlaboratoriumcampagne\u00a0vliegas\u00a0is niet enkel een controle-instrument, maar ook een leerinstrument dat laboratoria ondersteunt bij kwaliteitsbeheer en benchmarking.<\/span><span data-ccp-props=\"\">\u00a0<\/span><\/p>\n<h4 aria-level=\"3\"><span data-contrast=\"none\">Langetermijnopvolging<\/span><span data-ccp-props=\"{\">\u00a0<\/span><\/h4>\n<p><span data-contrast=\"auto\">Via het PROCERTUS-extranet kunnen laboratoria\u00a0hun\u00a0prestaties over meerdere jaren vergelijken, trends identificeren en interne audits versterken.<\/span><span data-ccp-props=\"\">\u00a0<\/span><\/p>\n<h4><span data-contrast=\"none\">Meerwaarde voor certificatie<\/span><span data-ccp-props=\"{\">\u00a0<\/span><\/h4>\n<p><span data-contrast=\"auto\">Een betrouwbaar laboratorium is essentieel binnen BENOR- en CE-certificatie. Deelname aan\u00a0de\u00a0interlaboratoriumcampagne\u00a0Vliegas biedt een objectieve toets van meetnauwkeurigheid en consistentie, waardoor het vertrouwen in resultaten en in het kwaliteitsborgingssysteem wordt versterkt.<\/span><span data-ccp-props=\"\">\u00a0<\/span><\/p>\n<p><strong><a href=\"https:\/\/www.procertus.be\/wp-content\/uploads\/2026\/08\/Interlabo-fly-ash-2023-2025-Final-report-anonymous-EN.pdf\" target=\"_blank\" rel=\"noopener\">Download het volledige verslag hier. <\/a><\/strong><\/p>\n<p><span data-contrast=\"none\">Wilt u weten wat dit betekent voor uw laboratorium of certificatie?<br \/>\n<\/span><span data-contrast=\"none\">Neem contact op met PROCERTUS:<\/span><span data-ccp-props=\"{\">\u00a0<\/span><\/p>\n<ul>\n<li><span data-contrast=\"none\">02 234 67 60<\/span><\/li>\n<li><a href=\"mailto:interlab.fly-ash@procertus.be\"><span data-contrast=\"none\">interlab.fly-ash@procertus.be<\/span><\/a><span data-ccp-props=\"\">\u00a0<\/span><\/li>\n<\/ul>\n<\/div><\/div><\/div><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":6,"featured_media":6841,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[126,112],"tags":[],"class_list":["post-6832","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-certificatie","category-laboratoria"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Interlaboratoriumcampagne Vliegas<\/title>\n<meta name=\"description\" content=\"Ontdek de resultaten van de Interlaboratoriumcampagne Vliegas 2023-2025. 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