{"id":11020,"date":"2026-06-24T03:49:59","date_gmt":"2026-06-24T03:49:59","guid":{"rendered":"https:\/\/michemicals.com\/?p=11020"},"modified":"2026-06-24T06:37:22","modified_gmt":"2026-06-24T06:37:22","slug":"redispersible-polymer-powder-concrete-repair-mortar","status":"publish","type":"post","link":"https:\/\/michemicals.com\/vi\/redispersible-polymer-powder-concrete-repair-mortar\/","title":{"rendered":"Redispersible Polymer Powder for Concrete Repair Mortar: Bonding, Flexibility and Durability"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"11020\" class=\"elementor elementor-11020\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-25f25ec7 elementor-reverse-mobile elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"25f25ec7\" data-element_type=\"section\" data-e-type=\"section\" 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href=\"https:\/\/michemicals.com\/vi\/2026\/06\/24\/\">\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-fas-calendar-week\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M0 464c0 26.5 21.5 48 48 48h352c26.5 0 48-21.5 48-48V192H0v272zm64-192c0-8.8 7.2-16 16-16h288c8.8 0 16 7.2 16 16v64c0 8.8-7.2 16-16 16H80c-8.8 0-16-7.2-16-16v-64zM400 64h-48V16c0-8.8-7.2-16-16-16h-32c-8.8 0-16 7.2-16 16v48H160V16c0-8.8-7.2-16-16-16h-32c-8.8 0-16 7.2-16 16v48H48C21.5 64 0 85.5 0 112v48h448v-48c0-26.5-21.5-48-48-48z\"><\/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>Th\u00e1ng 6 24, 2026<\/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<li class=\"elementor-icon-list-item elementor-repeater-item-6cd1462 elementor-inline-item\" itemprop=\"author\">\n\t\t\t\t\t\t<a href=\"https:\/\/michemicals.com\/vi\/author\/protizerr-com\/\">\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-user-circle\" viewBox=\"0 0 496 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M248 104c-53 0-96 43-96 96s43 96 96 96 96-43 96-96-43-96-96-96zm0 144c-26.5 0-48-21.5-48-48s21.5-48 48-48 48 21.5 48 48-21.5 48-48 48zm0-240C111 8 0 119 0 256s111 248 248 248 248-111 248-248S385 8 248 8zm0 448c-49.7 0-95.1-18.3-130.1-48.4 14.9-23 40.4-38.6 69.6-39.5 20.8 6.4 40.6 9.6 60.5 9.6s39.7-3.1 60.5-9.6c29.2 1 54.7 16.5 69.6 39.5-35 30.1-80.4 48.4-130.1 48.4zm162.7-84.1c-24.4-31.4-62.1-51.9-105.1-51.9-10.2 0-26 9.6-57.6 9.6-31.5 0-47.4-9.6-57.6-9.6-42.9 0-80.6 20.5-105.1 51.9C61.9 339.2 48 299.2 48 256c0-110.3 89.7-200 200-200s200 89.7 200 200c0 43.2-13.9 83.2-37.3 115.9z\"><\/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-author\">\n\t\t\t\t\t\t\t\t\t\tmichem\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\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t<div class=\"elementor-element elementor-element-31e0ebf9 e-flex e-con-boxed e-con e-parent\" data-id=\"31e0ebf9\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-48410d79 e-con-full e-flex e-con e-child\" data-id=\"48410d79\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-45049de2 e-con-full e-flex e-con e-child\" data-id=\"45049de2\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-4dc5ed5e elementor-widget elementor-widget-heading\" data-id=\"4dc5ed5e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Introduction<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4e10ba31 elementor-widget elementor-widget-text-editor\" data-id=\"4e10ba31\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Concrete repair is one of the most technically demanding applications in civil construction. Whether you&#8217;re restoring a highway bridge deck, rehabilitating an industrial floor, or patching spalled columns in a parking structure, the repair mortar must achieve\u00a0<strong>adhesion to existing concrete, dimensional compatibility, crack resistance, and long-term durability<\/strong>\u00a0\u2014 simultaneously.<\/p><p>Redispersible polymer powder (RDP) is the additive that makes all of this possible. In this guide, we explain the science behind polymer-modified repair mortars, the performance advantages of RDP, and how to select the right Michem grade for your project.<\/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<div class=\"elementor-element elementor-element-3a93cfb0 e-flex e-con-boxed e-con e-parent\" data-id=\"3a93cfb0\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-6cf2a99d e-con-full e-flex e-con e-child\" data-id=\"6cf2a99d\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-a7b1e44 e-con-full e-flex e-con e-child\" data-id=\"a7b1e44\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-2e7ce6ff e-con-full e-flex e-con e-child\" data-id=\"2e7ce6ff\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-4b63a281 elementor-toc--minimized-on-tablet elementor-widget elementor-widget-table-of-contents\" data-id=\"4b63a281\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;exclude_headings_by_selector&quot;:[],&quot;no_headings_message&quot;:&quot;No headings were found on this page.&quot;,&quot;headings_by_tags&quot;:[&quot;h2&quot;,&quot;h3&quot;,&quot;h4&quot;,&quot;h5&quot;,&quot;h6&quot;],&quot;marker_view&quot;:&quot;numbers&quot;,&quot;minimize_box&quot;:&quot;yes&quot;,&quot;minimized_on&quot;:&quot;tablet&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;:[]}}\" data-widget_type=\"table-of-contents.default\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-toc__header\">\n\t\t\t\t\t\t<h4 class=\"elementor-toc__header-title\">\n\t\t\t\tTable of Contents\t\t\t<\/h4>\n\t\t\t\t\t\t\t\t\t\t<div class=\"elementor-toc__toggle-button elementor-toc__toggle-button--expand\" role=\"button\" tabindex=\"0\" aria-controls=\"elementor-toc__4b63a281\" aria-expanded=\"true\" aria-label=\"Open table of contents\"><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-down\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M207.029 381.476L12.686 187.132c-9.373-9.373-9.373-24.569 0-33.941l22.667-22.667c9.357-9.357 24.522-9.375 33.901-.04L224 284.505l154.745-154.021c9.379-9.335 24.544-9.317 33.901.04l22.667 22.667c9.373 9.373 9.373 24.569 0 33.941L240.971 381.476c-9.373 9.372-24.569 9.372-33.942 0z\"><\/path><\/svg><\/div>\n\t\t\t\t<div class=\"elementor-toc__toggle-button elementor-toc__toggle-button--collapse\" role=\"button\" tabindex=\"0\" aria-controls=\"elementor-toc__4b63a281\" aria-expanded=\"true\" aria-label=\"Close table of contents\"><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-up\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M240.971 130.524l194.343 194.343c9.373 9.373 9.373 24.569 0 33.941l-22.667 22.667c-9.357 9.357-24.522 9.375-33.901.04L224 227.495 69.255 381.516c-9.379 9.335-24.544 9.317-33.901-.04l-22.667-22.667c-9.373-9.373-9.373-24.569 0-33.941L207.03 130.525c9.372-9.373 24.568-9.373 33.941-.001z\"><\/path><\/svg><\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<div id=\"elementor-toc__4b63a281\" 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 class=\"elementor-element elementor-element-5f7be1a elementor-widget elementor-widget-text-editor\" data-id=\"5f7be1a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2>Why Standard Cement Mortars Fail in Concrete Repair<\/h2><p>Plain cement-sand mortars have been used for decades in repair work \u2014 and they consistently disappoint. Here&#8217;s why:<\/p><h3>1. Differential Shrinkage<\/h3><p>Fresh repair mortar shrinks as it cures. The existing concrete substrate does not. This mismatch creates tensile stress at the interface, eventually causing debonding or cracking.<\/p><h3>2. Low Bond Strength<\/h3><p>The interfacial transition zone between repair mortar and substrate is inherently weak. Without polymer modification, bond strength rarely exceeds\u00a0<strong>0.5\u20130.8 MPa<\/strong>\u00a0\u2014 far below structural requirements.<\/p><h3>3. Rigid, Brittle Behaviour<\/h3><p>Standard mortar is stiff. When the structure deflects under load, temperature cycling or vibration, the rigid repair patch cracks and falls away.<\/p><h3>4. Poor Carbonation\/Chloride Resistance<\/h3><p>An unmodified repair that lets moisture and chlorides reach the underlying reinforcement is worse than no repair at all.<\/p><p>RDP-modified mortars resolve all four problems through a fundamentally different microstructure.<\/p><hr \/><h2>How Redispersible Polymer Powder Works in Repair Mortar<\/h2><p>When RDP is dry-blended into a mortar formulation, it remains dormant. Upon mixing with water, the powder re-disperses into a stable polymer emulsion \u2014 essentially recreating the latex that was spray-dried during manufacturing.<\/p><p>As the mortar cures, the polymer chains migrate toward surfaces (substrate, aggregate, air voids) and form a\u00a0<strong>continuous, interpenetrating polymer-cement matrix<\/strong>:<\/p><div class=\"cb-markdown-pre-wrapper\"><div class=\"cb-markdown-pre-container\"><pre class=\"cb-markdown-pre\"><code>[Cement hydrate crystal network] + [Polymer film bridges]\n         \u2193 synergistic bonding \u2193\n   \u2192 Improved adhesion\n   \u2192 Reduced stiffness (flexible mortar)\n   \u2192 Pore sealing (reduced permeability)\n   \u2192 Crack bridging capability\n<\/code><\/pre><\/div><\/div><p>The result is a mortar that behaves partly like a polymer adhesive and partly like a cementitious binder \u2014 the best of both worlds.<\/p><hr \/><h2>Key Performance Benefits of RDP in Concrete Repair Mortar<\/h2><h3>\u2705 Bond Strength \u2014 The Critical Metric<\/h3><p>For structural repair, EN 1504-3 requires a minimum bond strength of\u00a0<strong>0.8 MPa<\/strong>\u00a0(Class R2) to\u00a0<strong>1.5 MPa<\/strong>\u00a0(Class R4). RDP addition consistently elevates bond strength well beyond these thresholds:<\/p><div class=\"cb-markdown-table-wrapper\"><table><thead><tr><th>RDP Dosage (% by cement weight)<\/th><th>Bond Strength to Concrete (MPa)<\/th><th>ASTM C1583 Pull-Off<\/th><\/tr><\/thead><tbody><tr><td>0% (control)<\/td><td>0.5 \u2013 0.7<\/td><td>Fails substrate preparation<\/td><\/tr><tr><td>3%<\/td><td>1.1 \u2013 1.4<\/td><td>Pass R2<\/td><\/tr><tr><td>5%<\/td><td>1.6 \u2013 2.0<\/td><td>Pass R3<\/td><\/tr><tr><td>7%<\/td><td>2.0 \u2013 2.5<\/td><td>Pass R4<\/td><\/tr><tr><td>10%<\/td><td>2.2 \u2013 2.8<\/td><td>Cohesive failure in substrate<\/td><\/tr><\/tbody><\/table><\/div><p><em>Note: Bond strength also depends on substrate preparation (minimum CSP 3 per ICRI 310.2), w\/c ratio and curing conditions.<\/em><\/p><h3>\u2705 Flexibility and Crack Bridging<\/h3><p>Polymer modification shifts the stress-strain behaviour from brittle to semi-flexible. This is measured by the\u00a0<strong>elongation at break<\/strong>\u00a0and the\u00a0<strong>elastic modulus<\/strong>\u00a0of hardened mortar:<\/p><div class=\"cb-markdown-table-wrapper\"><table><thead><tr><th>System<\/th><th>E-modulus (GPa)<\/th><th>Elongation at Break (%)<\/th><\/tr><\/thead><tbody><tr><td>Plain cement mortar<\/td><td>20 \u2013 30<\/td><td>&lt; 0.05%<\/td><\/tr><tr><td>RDP-modified 5%<\/td><td>8 \u2013 15<\/td><td>0.1 \u2013 0.3%<\/td><\/tr><tr><td>RDP-modified 10%<\/td><td>4 \u2013 10<\/td><td>0.3 \u2013 0.8%<\/td><\/tr><\/tbody><\/table><\/div><p>A lower E-modulus means the repair mortar can accommodate micro-movement without cracking \u2014 critical for bridge decks, parking structures and industrial floors subjected to dynamic loading.<\/p><h3>\u2705 Shrinkage Compensation<\/h3><p>The polymer network acts as a micro-reinforcement that restrains drying shrinkage. Studies consistently show\u00a0<strong>20\u201340% reduction in total drying shrinkage<\/strong>\u00a0at 5\u20138% RDP addition, dramatically reducing the risk of early-age cracking and interfacial delamination.<\/p><h3>\u2705 Impermeability and Chloride Resistance<\/h3><p>RDP forms a polymer film that blocks capillary pores, reducing:<\/p><ul><li><strong>Water absorption<\/strong>\u00a0by 40\u201360%<\/li><li><strong>Chloride ion diffusion coefficient<\/strong>\u00a0by 50\u201370%<\/li><li><strong>Carbonation depth<\/strong>\u00a0by 30\u201350%<\/li><\/ul><p>These improvements directly extend the service life of repaired structures in aggressive marine, de-icing salt or industrial environments.<\/p><h3>\u2705 Workability and Application Properties<\/h3><p>Beyond durability, polymer modification also improves:<\/p><ul><li><strong>Open time<\/strong>: Extended working window, important for large repair areas<\/li><li><strong>Sag resistance<\/strong>: Enables overhead and vertical repair without slumping<\/li><li><strong>Surface finish<\/strong>: Smoother, more cohesive mortar texture<\/li><li><strong>Adhesion to wet substrates<\/strong>: Critical when full substrate drying is impractical on site<\/li><\/ul><hr \/><h2>MIchem Grade Selection for Repair Mortars<\/h2><p>Michem Chemical Co., Ltd. produces\u00a0 RDP in four primary grades, each optimised for specific repair applications:<\/p><h3>Michem Grade Specifications<\/h3><div class=\"cb-markdown-table-wrapper\"><table><thead><tr><th>Grade<\/th><th>Polymer Type<\/th><th>Tg (\u00b0C)<\/th><th>Ash Content<\/th><th>Key Characteristic<\/th><\/tr><\/thead><tbody><tr><td><strong>5010R<\/strong><\/td><td>VAE<\/td><td>15<\/td><td>14 \u00b1 2%<\/td><td>High rigidity, excellent compressive strength contribution; for structural repair<\/td><\/tr><tr><td><strong>5030FN<\/strong><\/td><td>VAE<\/td><td>15<\/td><td>12 \u00b1 2%<\/td><td>Balanced flexibility\/strength; general-purpose repair mortar<\/td><\/tr><tr><td><strong>5034H<\/strong><\/td><td>VAE<\/td><td>15<\/td><td>12 \u00b1 2%<\/td><td>Improved hydrophobicity; for exterior and wet-exposure repair<\/td><\/tr><tr><td><strong>5002T<\/strong><\/td><td>VA\/E\/VV<\/td><td>10<\/td><td>12 \u00b1 2%<\/td><td>Lower Tg, superior flexibility; for crack-bridging repair systems<\/td><\/tr><\/tbody><\/table><\/div><p><em>All\u00a0 grades: solid content \u226599%, MFFT 4\u00b0C, bulk density 400\u2013600 g\/L, pH 6\u20138, CAS 24937-78-8<\/em><\/p><h3>Application-Based Grade Recommendation<\/h3><div class=\"cb-markdown-table-wrapper\"><table><thead><tr><th>Repair Application<\/th><th>Recommended Grade<\/th><th>Dosage (% bwoc)<\/th><th>Rationale<\/th><\/tr><\/thead><tbody><tr><td>Structural column\/beam repair<\/td><td>5010R<\/td><td>4\u20136%<\/td><td>High compressive strength required<\/td><\/tr><tr><td>Bridge deck overlay<\/td><td>5030FN<\/td><td>5\u20138%<\/td><td>Balance of bond, flexibility and abrasion<\/td><\/tr><tr><td>Exterior fa\u00e7ade\/balcony repair<\/td><td>5034H<\/td><td>5\u20137%<\/td><td>Hydrophobicity for weathering resistance<\/td><\/tr><tr><td>Crack injection \/ crack bridging overlay<\/td><td>5002T<\/td><td>7\u201310%<\/td><td>Low Tg maximises elongation at break<\/td><\/tr><tr><td>Industrial floor patching<\/td><td>5030FN or 5034H<\/td><td>4\u20136%<\/td><td>Abrasion + chemical resistance<\/td><\/tr><tr><td>Underwater\/wet substrate repair<\/td><td>5034H<\/td><td>6\u20138%<\/td><td>Hydrophobic modification maintains bond in wet conditions<\/td><\/tr><\/tbody><\/table><\/div><hr \/><h2>Optimised Repair Mortar Formulations<\/h2><h3>Formulation 1: General Structural Repair Mortar (EN 1504-3 Class R3)<\/h3><div class=\"cb-markdown-table-wrapper\"><table><thead><tr><th>Component<\/th><th>Dosage<\/th><\/tr><\/thead><tbody><tr><td>Portland Cement (CEM I 52.5)<\/td><td>400 kg\/m\u00b3<\/td><\/tr><tr><td>Graded Quartz Sand (0\u20132 mm)<\/td><td>1,100 kg\/m\u00b3<\/td><\/tr><tr><td>Michem 5030FN<\/td><td>5% by cement weight (20 kg\/m\u00b3)<\/td><\/tr><tr><td>Michem HPMC MH100K<\/td><td>0.2% by cement weight (0.8 kg\/m\u00b3)<\/td><\/tr><tr><td>Silica Fume<\/td><td>40 kg\/m\u00b3<\/td><\/tr><tr><td>Michem Calcium Formate<\/td><td>0.5% (for early demould in cold weather)<\/td><\/tr><tr><td>Water<\/td><td>W\/C \u2248 0.38<\/td><\/tr><tr><td><strong>Expected Properties<\/strong><\/td><td>Bond \u22651.5 MPa; Compressive strength \u226525 MPa (28d); Carbonation resistance Class III<\/td><\/tr><\/tbody><\/table><\/div><h3>Formulation 2: Flexible Crack-Bridging Repair Overlay<\/h3><div class=\"cb-markdown-table-wrapper\"><table><thead><tr><th>Component<\/th><th>Dosage<\/th><\/tr><\/thead><tbody><tr><td>Portland Cement (CEM I 42.5)<\/td><td>350 kg\/m\u00b3<\/td><\/tr><tr><td>Graded Sand (0\u20131.6 mm)<\/td><td>900 kg\/m\u00b3<\/td><\/tr><tr><td>Michem 5002T<\/td><td>10% by cement weight (35 kg\/m\u00b3)<\/td><\/tr><tr><td>Michem HPMC MH75K<\/td><td>0.25% (sag resistance)<\/td><\/tr><tr><td>Fibre Reinforcement (optional)<\/td><td>TenaBrix\u00ae 6 mm PP fibre, 0.6 kg\/m\u00b3<\/td><\/tr><tr><td>Water<\/td><td>W\/C \u2248 0.42<\/td><\/tr><tr><td><strong>Expected Properties<\/strong><\/td><td>Elongation &gt;0.5%; Bond \u22651.2 MPa; Crack bridging up to 0.5 mm width<\/td><\/tr><\/tbody><\/table><\/div><h3>Formulation 3: Rapid-Hardening Repair Mortar (Traffic Re-Opening &lt; 4 hours)<\/h3><div class=\"cb-markdown-table-wrapper\"><table><thead><tr><th>Component<\/th><th>Dosage<\/th><\/tr><\/thead><tbody><tr><td>Rapid-setting cement (CSA or rapid OPC)<\/td><td>450 kg\/m\u00b3<\/td><\/tr><tr><td>Sand (0\u20132 mm)<\/td><td>1,050 kg\/m\u00b3<\/td><\/tr><tr><td>Michem 5034H<\/td><td>4% by cement weight<\/td><\/tr><tr><td>Michem Calcium Formate<\/td><td>1.0% by cement weight<\/td><\/tr><tr><td>Michem PCE SP630<\/td><td>0.2% by cement weight<\/td><\/tr><tr><td>Water<\/td><td>W\/C \u2248 0.34<\/td><\/tr><tr><td><strong>Expected Properties<\/strong><\/td><td>Compressive strength \u226515 MPa @ 4h; Bond \u22651.0 MPa @ 4h; Road re-open within 4 hours<\/td><\/tr><\/tbody><\/table><\/div><hr \/><h2>Compliance Standards for Concrete Repair<\/h2><h3>Europe (EN 1504 Series)<\/h3><p>EN 1504-3 &#8220;Structural and non-structural repair&#8221; defines four classes:<\/p><div class=\"cb-markdown-table-wrapper\"><table><thead><tr><th>Class<\/th><th>Min. Compressive Strength<\/th><th>Min. Bond<\/th><th>Typical RDP Dosage<\/th><\/tr><\/thead><tbody><tr><td>R1<\/td><td>10 MPa<\/td><td>\u2014<\/td><td>2\u20133%<\/td><\/tr><tr><td>R2<\/td><td>15 MPa<\/td><td>0.8 MPa<\/td><td>3\u20135%<\/td><\/tr><tr><td>R3<\/td><td>25 MPa<\/td><td>1.5 MPa<\/td><td>5\u20137%<\/td><\/tr><tr><td>R4<\/td><td>45 MPa<\/td><td>2.0 MPa<\/td><td>7\u201310%<\/td><\/tr><\/tbody><\/table><\/div><h3>North America (ICRI \/ ACI)<\/h3><ul><li><strong>ICRI 310.2<\/strong>: Substrate preparation (CSP 1\u20139 scale)<\/li><li><strong>ASTM C928<\/strong>: Standard specification for packaged dry, hydraulic-cement mortar for concrete repairs<\/li><li><strong>ACI 546R<\/strong>: Guide for the selection and use of materials for the repair of concrete<\/li><\/ul><h3>Middle East (GCC)<\/h3><ul><li><strong>SASO ISO 8045<\/strong>: Bonding agents and polymer-modified repair mortars<\/li><li>Saudi Aramco, SABIC procurement specifications typically require minimum polymer content of 4\u20136% and bond strength \u22651.5 MPa<\/li><\/ul><h3>India<\/h3><ul><li><strong>IS 3068<\/strong>: Bond testing of repair mortars<\/li><li><strong>IRC:SP:40<\/strong>: Guidelines for repair and rehabilitation of concrete bridges \u2014 recommends polymer-modified mortars for all structural repair<\/li><\/ul><hr \/><h2>Application Process for RDP-Modified Repair Mortar<\/h2><p>A successful repair depends as much on application technique as on formulation:<\/p><h3>Step 1: Substrate Preparation<\/h3><ul><li>Remove all contaminated, carbonated or loose concrete to minimum\u00a0<strong>CSP 3<\/strong>\u00a0(light sandblasting or water jetting at 70\u2013140 MPa)<\/li><li>Expose reinforcement if corrosion depth &gt; 20 mm; clean to Sa 2\u00bd per ISO 8501-1<\/li><li>Avoid feather-edging; minimum repair depth\u00a0<strong>10 mm<\/strong><\/li><\/ul><h3>Step 2: Substrate Pre-Wetting<\/h3><ul><li>Saturate substrate to\u00a0<strong>SSD (saturated surface dry)<\/strong>\u00a0condition before application<\/li><li>Avoid standing water; remove with compressed air if needed<\/li><\/ul><h3>Step 3: Bonding Coat (Optional but Recommended)<\/h3><ul><li>Brush-apply a bonding slurry: cement + Michem RDP powder or latex + water<\/li><li>Apply repair mortar onto &#8220;wet on wet&#8221; \u2014 do not allow bonding coat to dry<\/li><\/ul><h3>Step 4: Mixing and Application<\/h3><ul><li>For hand-applied repair: use standard paddle mixer at low speed; do not over-water<\/li><li>For sprayed repair: adjust w\/c and set retarder dosage for pump consistency<\/li><li>For overhead repair: use anti-sagging mortar with higher HPMC content and reduced water<\/li><\/ul><h3>Step 5: Finishing and Curing<\/h3><ul><li>Finish within open time (RDP extends open time vs. plain mortar)<\/li><li>Begin wet curing or apply curing membrane within 20 minutes of finishing<\/li><li>Minimum 7 days curing at \u226510\u00b0C; extend to 14 days in cold weather or for structural repairs<\/li><\/ul><hr \/><h2>Common Problems and RDP-Based Solutions<\/h2><div class=\"cb-markdown-table-wrapper\"><table><thead><tr><th>Problem<\/th><th>Root Cause<\/th><th>RDP Solution<\/th><\/tr><\/thead><tbody><tr><td>Repair debonds within 1\u20132 years<\/td><td>Low bond strength, differential shrinkage<\/td><td>Increase RDP to 5\u20137%; improve substrate prep<\/td><\/tr><tr><td>Surface cracks appear at 3\u20137 days<\/td><td>Rapid drying shrinkage<\/td><td>Add RDP 5002T for flexibility; improve curing protocol<\/td><\/tr><tr><td>Repair patch is soft \/ dusting<\/td><td>Over-watering, low cement ratio<\/td><td>Reduce w\/c; use PCE superplasticizer instead of extra water<\/td><\/tr><tr><td>Colour difference with original<\/td><td>Different mortar composition<\/td><td>Use pigment-compatible RDP 5034H grade<\/td><\/tr><tr><td>Failure in wet\/marine exposure<\/td><td>Water ingress at interface<\/td><td>Use hydrophobic RDP 5034H; apply crystalline waterproofing primer<\/td><\/tr><\/tbody><\/table><\/div><hr \/><h2>Market Drivers for Polymer-Modified Repair<\/h2><h3>Infrastructure Rehabilitation Boom<\/h3><p>The global concrete repair market was valued at\u00a0<strong>USD 4.6 billion in 2023<\/strong>\u00a0and is projected to exceed\u00a0<strong>USD 7.2 billion by 2030<\/strong>\u00a0(CAGR ~6.7%). Key drivers:<\/p><ul><li><strong>Ageing infrastructure<\/strong>: In Europe and North America, 30\u201340% of bridges are classified as structurally deficient<\/li><li><strong>Gulf infrastructure investment<\/strong>: Saudi Arabia&#8217;s Vision 2030 and UAE&#8217;s infrastructure megaprojects demand premium repair systems<\/li><li><strong>India PMGSY and smart city initiatives<\/strong>: Rapidly expanding road and urban infrastructure network requiring ongoing maintenance<\/li><\/ul><h3>Performance-Specification Shift<\/h3><p>Historically, repair was specified purely by compressive strength (a poor indicator of durability). The shift to\u00a0<strong>EN 1504<\/strong>\u00a0and\u00a0<strong>ACI performance-based<\/strong>\u00a0specifications has made bond strength, permeability and crack bridging \u2014 the very properties that RDP optimises \u2014 mandatory evaluation criteria.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7c89b8d elementor-widget elementor-widget-heading\" data-id=\"7c89b8d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">8. Frequently Asked Questions<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6a1b541 elementor-widget elementor-widget-accordion\" data-id=\"6a1b541\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"accordion.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-accordion\">\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-1111\" class=\"elementor-tab-title\" data-tab=\"1\" role=\"button\" aria-controls=\"elementor-tab-content-1111\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-right\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><i class=\"icon icon-plus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><i class=\"icon icon-minus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">What is the ideal RDP dosage range for repair mortars? <\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-1111\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"1\" role=\"region\" aria-labelledby=\"elementor-tab-title-1111\"><p>\u00a0For most structural repair applications, 4\u20138% RDP by cement weight is the optimum range. Below 3%, performance improvement is marginal. Above 10%, setting time extension and cost impact need to be evaluated.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-1112\" class=\"elementor-tab-title\" data-tab=\"2\" role=\"button\" aria-controls=\"elementor-tab-content-1112\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-right\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><i class=\"icon icon-plus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><i class=\"icon icon-minus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">Can I use liquid SBR latex instead of RDP powder? <\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-1112\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"2\" role=\"region\" aria-labelledby=\"elementor-tab-title-1112\"><p>Liquid SBR latex is also effective but requires separate liquid component handling. Dry-blended RDP powder is preferred for factory-produced repair mortars and construction site applications where dosing consistency is critical.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-1113\" class=\"elementor-tab-title\" data-tab=\"3\" role=\"button\" aria-controls=\"elementor-tab-content-1113\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-right\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><i class=\"icon icon-plus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><i class=\"icon icon-minus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">Does RDP affect compressive strength?<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-1113\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"3\" role=\"region\" aria-labelledby=\"elementor-tab-title-1113\"><p>At dosages up to 5%, the effect on compressive strength is minimal or slightly positive. At 7\u201310%, compressive strength may decrease modestly (5\u201315%), which is acceptable because the higher bond strength, flexibility and durability more than compensate.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-1114\" class=\"elementor-tab-title\" data-tab=\"4\" role=\"button\" aria-controls=\"elementor-tab-content-1114\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-right\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><i class=\"icon icon-plus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><i class=\"icon icon-minus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">Can Michem RDP be used in low-temperature repair applications? <\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-1114\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"4\" role=\"region\" aria-labelledby=\"elementor-tab-title-1114\"><p>\u00a0Calcium nitrite is primarily used as a corrosion inhibitor-accelerator in reinforced concrete. For tile grout (typically unreinforced), calcium formate is preferred: lower cost, equivalent acceleration, no nitrite handling restrictions.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-1115\" class=\"elementor-tab-title\" data-tab=\"5\" role=\"button\" aria-controls=\"elementor-tab-content-1115\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-right\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><i class=\"icon icon-plus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><i class=\"icon icon-minus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">How does RDP compare to pure acrylic or styrene-acrylic polymers in repair?<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-1115\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"5\" role=\"region\" aria-labelledby=\"elementor-tab-title-1115\"><p>VAE-based RDP offers excellent adhesion, UV stability and alkali resistance at competitive cost. Pure acrylics have slightly better weather resistance but at significantly higher cost. For most repair applications, VAE-based RDP provides the optimal performance-to-cost ratio.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-1116\" class=\"elementor-tab-title\" data-tab=\"6\" role=\"button\" aria-controls=\"elementor-tab-content-1116\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-right\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><i class=\"icon icon-plus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><i class=\"icon icon-minus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">What shelf life and storage conditions apply? <\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-1116\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"6\" role=\"region\" aria-labelledby=\"elementor-tab-title-1116\"><p>Our RDP should be stored in a cool, dry location away from moisture. Shelf life is 12 months from the manufacturing date in original sealed packaging.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-356c1ce elementor-widget elementor-widget-text-editor\" data-id=\"356c1ce\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2>Why Choose Michem for Your Repair Mortar Programme?<\/h2><p><strong>Michem<\/strong>\u00a0is the dedicated RDP brand of\u00a0<strong>Michem Chemical Co., Ltd.<\/strong>\u00a0\u2014 a specialty construction chemicals manufacturer supplying customers in over 40 countries.<\/p><ul><li>\u2705\u00a0<strong>4 optimised grades<\/strong>\u00a0covering the full spectrum from structural to crack-bridging repair<\/li><li>\u2705\u00a0<strong>Technical support<\/strong>: Formulation assistance, on-site testing, third-party validation<\/li><li>\u2705\u00a0<strong>Consistent quality<\/strong>: ISO 9001 production, in-process QC at every batch<\/li><li>\u2705\u00a0<strong>Supply reliability<\/strong>: Production capacity for project volumes from 1 MT to 500+ MT\/month<\/li><li>\u2705\u00a0<strong>Compliance documentation<\/strong>: COA, TDS, SDS, REACH and TSCA declarations<\/li><\/ul><p><strong>Ready to upgrade your concrete repair system?<\/strong>\u00a0Contact the Michem technical team at\u00a0<a href=\"https:\/\/michemicals.com\/contact-us\" target=\"_blank\" rel=\"noopener noreferrer\">michemicals.com\/contact<\/a>\u00a0for formulation recommendations and samples.<\/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-5af14d16 elementor-post-navigation-borders-yes elementor-widget elementor-widget-post-navigation\" data-id=\"5af14d16\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"post-navigation.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-post-navigation\" role=\"navigation\" aria-label=\"Post 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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\"><\/path><\/svg><span class=\"elementor-screen-only\">Ti\u1ebfp theo<\/span><\/span><\/a>\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<div class=\"elementor-element elementor-element-4fb71b09 e-con-full e-flex e-con e-child\" data-id=\"4fb71b09\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-20cfaf8f e-con-full e-flex e-con e-child\" data-id=\"20cfaf8f\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2b3aa571 elementor-widget elementor-widget-heading\" data-id=\"2b3aa571\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<div class=\"elementor-heading-title 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data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/michemicals.com\/products\/\" target=\"_blank\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">View More &gt;&gt;&gt;<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\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-52386b7b elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"52386b7b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"divider.default\">\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 class=\"elementor-element elementor-element-2431e3c0 elementor-align-left elementor-widget elementor-widget-button\" 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Whether you&#8217;re restoring a highway bridge deck, rehabilitating an industrial floor, or patching spalled columns in a parking structure, the repair mortar must achieve\u00a0adhesion to existing concrete, dimensional compatibility, crack resistance, and long-term durability\u00a0\u2014 simultaneously. Redispersible polymer powder (RDP) is the [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":9477,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_angie_page":false,"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","page_builder":"","footnotes":""},"categories":[1],"tags":[187,188,171,185,186],"class_list":["post-11020","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-concrete-repair","tag-construction-chemicals","tag-polymer-modified-mortar","tag-rdp","tag-vae"],"_links":{"self":[{"href":"https:\/\/michemicals.com\/vi\/wp-json\/wp\/v2\/posts\/11020","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/michemicals.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/michemicals.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/michemicals.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/michemicals.com\/vi\/wp-json\/wp\/v2\/comments?post=11020"}],"version-history":[{"count":10,"href":"https:\/\/michemicals.com\/vi\/wp-json\/wp\/v2\/posts\/11020\/revisions"}],"predecessor-version":[{"id":11034,"href":"https:\/\/michemicals.com\/vi\/wp-json\/wp\/v2\/posts\/11020\/revisions\/11034"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/michemicals.com\/vi\/wp-json\/wp\/v2\/media\/9477"}],"wp:attachment":[{"href":"https:\/\/michemicals.com\/vi\/wp-json\/wp\/v2\/media?parent=11020"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/michemicals.com\/vi\/wp-json\/wp\/v2\/categories?post=11020"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/michemicals.com\/vi\/wp-json\/wp\/v2\/tags?post=11020"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}