{"id":12963,"date":"2026-04-28T02:22:12","date_gmt":"2026-04-28T02:22:12","guid":{"rendered":"https:\/\/hlh-js.com\/?p=12963"},"modified":"2026-04-28T05:08:18","modified_gmt":"2026-04-28T05:08:18","slug":"sandblasting-abrasives-for-concrete-surface-preparation","status":"publish","type":"post","link":"https:\/\/hlh-js.com\/fr\/resource\/blog\/sandblasting-abrasives-for-concrete-surface-preparation\/","title":{"rendered":"Sandblasting Abrasives for\u00a0Concrete Surface Preparation"},"content":{"rendered":"<style>\n\/* ============================================================\n   SHARED CLUSTER STYLE \u2014 Sandblasting Abrasives Series\n   Jiangsu Henglihong Technology Co., Ltd.\n   CSS prefix: hlh-cl-\n   ============================================================ *\/\n.hlh-cl-wrap*{box-sizing:border-box;margin:0;padding:0}\n.hlh-cl-wrap{font-family:'Georgia','Times New Roman',serif;color:#1a1a2e;line-height:1.75;font-size:16px;max-width:900px;margin:0 auto}\n.hlh-cl-wrap 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#b8d0eb;border-radius:7px;padding:16px 20px;margin-bottom:36px;text-decoration:none!important;border-bottom:none!important;transition:background .2s}\n.hlh-cl-pillar-back:hover{background:#ddeaf8}\n.hlh-cl-pillar-back-icon{font-size:20px;line-height:1}\n.hlh-cl-pillar-back strong{display:block;font-family:'Trebuchet MS',sans-serif;font-size:13px;font-weight:700;color:#1a4f8a}\n.hlh-cl-pillar-back span{font-size:12px;color:#4a6fa5}\n\/* Responsive *\/\n@media(max-width:680px){\n  .hlh-cl-hero{padding:32px 22px}\n  .hlh-cl-toc ol{columns:1}\n  .hlh-cl-spec-grid{grid-template-columns:1fr 1fr}\n  .hlh-cl-proscons{grid-template-columns:1fr}\n  .hlh-cl-app-grid{grid-template-columns:1fr}\n  .hlh-cl-related-grid{grid-template-columns:1fr}\n  .hlh-cl-stats{grid-template-columns:1fr 1fr}\n  .hlh-cl-final-cta{padding:32px 22px}\n}\n\n<\/style>\n<div class=\"hlh-cl-wrap\">\n<a href=\"https:\/\/hlh-js.com\/resource\/blog\/sandblasting-abrasives-types-grit-sizes-selection-guide\/\" target=\"_blank\" rel=\"noopener\" class=\"hlh-cl-pillar-back\"><span class=\"hlh-cl-pillar-back-icon\">\u2190<\/span><div><strong>Sandblasting Abrasives: Complete Buyer&#8217;s Guide<\/strong><span>Back to Pillar Page<\/span><\/div><\/a>\n<div class=\"hlh-cl-hero\">\n  <div class=\"hlh-cl-eyebrow\">Series C \u2014 Industry Application<\/div>\n  <h1>Sandblasting Abrasives for <span>Concrete Surface Preparation<\/span><\/h1>\n  <p class=\"hlh-cl-hero-sub\">Achieving the right Concrete Surface Profile (CSP) is the foundation of every successful industrial floor coating, epoxy lining, and waterproof membrane system. Comprehensive guide to abrasive selection, CSP targets, and coating system matching for concrete blasting applications.<\/p>\n  <div class=\"hlh-cl-hero-meta\"><span>CSP 1\u20139 Reference<\/span><span>Floor Coatings<\/span><span>Bridge Decks<\/span><span>Waterproof Membranes<\/span><\/div>\n  <div class=\"hlh-cl-cta-group\"><a href=\"https:\/\/hlh-js.com\/contact\/\" target=\"_blank\" rel=\"noopener\" class=\"hlh-cl-btn-primary\">Request a Quote<\/a><a href=\"#hlh-cl-media\" class=\"hlh-cl-btn-outline\">Media Guide \u2193<\/a><\/div>\n<\/div>\n<nav class=\"hlh-cl-toc\"><div class=\"hlh-cl-toc-title\">Table of Contents<\/div>\n<ol>\n  <li><a href=\"#hlh-cl-csp\">Understanding CSP Profiles<\/a><\/li>\n  <li><a href=\"#hlh-cl-media\">Media Selection for Concrete<\/a><\/li>\n  <li><a href=\"#hlh-cl-floor\">Industrial Floor Coatings<\/a><\/li>\n  <li><a href=\"#hlh-cl-bridge\">Bridge Decks &amp; Infrastructure<\/a><\/li>\n  <li><a href=\"#hlh-cl-tank\">Tank Linings &amp; Containment<\/a><\/li>\n  <li><a href=\"#hlh-cl-tips\">Technique Tips for Concrete<\/a><\/li>\n  <li><a href=\"#hlh-cl-related\">Related Resources<\/a><\/li>\n  <li><a href=\"#hlh-cl-faq\">FAQ<\/a><\/li>\n<\/ol><\/nav>\n\n<section id=\"hlh-cl-csp\">\n<h2 class=\"hlh-cl-h2\">Understanding Concrete Surface Profile (CSP)<\/h2>\n<p class=\"hlh-cl-lead\">The International Concrete Repair Institute (ICRI) defines Concrete Surface Profile (CSP) on a scale of 1 to 9, where CSP 1 is a nearly smooth surface and CSP 9 is extremely rough, with exposed large aggregate and deep valleys. Abrasive blasting is the most versatile method for achieving profiles across the full CSP range, from CSP 2\u20133 (light etching for thin-film coatings) to CSP 6\u20138 (aggressive profiling for thick membrane systems and overlay mortars).<\/p>\n<p>Unlike steel blasting, concrete surface preparation involves an additional variable: the concrete substrate&#8217;s compressive strength, aggregate type, and existing condition (laitance layer, contamination, previous coatings) all significantly affect the achieved CSP for a given abrasive and pressure. Pre-blast assessment and test panels are always recommended before committing to production blasting on new concrete.<\/p>\n<div class=\"hlh-cl-table-wrap\"><table class=\"hlh-cl-table\">\n<thead><tr><th>CSP Level<\/th><th>Profile Description<\/th><th>Typical Coating System<\/th><th>Blasting Method<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>CSP 2\u20133<\/td><td>Fine texture, slight aggregate exposure<\/td><td>Thin-film epoxy, polyurethane sealers<\/td><td>Light shot blast or fine abrasive blast<\/td><\/tr>\n<tr><td>CSP 3\u20135<\/td><td>Moderate texture, aggregate visible<\/td><td>Medium-build epoxy, urethane mortar<\/td><td>Shot blast or abrasive blast (medium)<\/td><\/tr>\n<tr><td>CSP 5\u20137<\/td><td>Coarse texture, significant aggregate exposure<\/td><td>High-build epoxy, broadcast quartz systems<\/td><td>Abrasive blast (coarse) or scarify then blast<\/td><\/tr>\n<tr><td>CSP 7\u20139<\/td><td>Very coarse, deep valleys, full aggregate exposure<\/td><td>Polymer concrete overlay, waterproof membrane<\/td><td>Heavy abrasive blast, scabbling, or milling<\/td><\/tr>\n<\/tbody>\n<\/table><\/div>\n<\/section>\n\n<section id=\"hlh-cl-media\">\n<h2 class=\"hlh-cl-h2\" id=\"hlh-cl-media\">Media Selection for Concrete Blasting<\/h2>\n<p>Concrete blasting media selection differs from steel blasting because concrete is a composite material \u2014 cement paste, fine and coarse aggregate \u2014 with non-uniform hardness. The goal is to remove the weak laitance (surface cement paste) layer and expose the underlying aggregate without crushing or fracturing the aggregate itself, which would leave a powdery, weakened surface unsuitable for coating adhesion.<\/p>\n<div class=\"hlh-cl-table-wrap\"><table class=\"hlh-cl-table\">\n<thead><tr><th>Media<\/th><th>CSP Achievable<\/th><th>Best For<\/th><th>Notes<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>Steel shot (wheel blast)<\/td><td>CSP 2\u20135<\/td><td>Large flat floor areas<\/td><td>Most efficient for large horizontal surfaces; leaves rounded dimple profile<\/td><\/tr>\n<tr><td>Aluminum oxide (36\u201360)<\/td><td>CSP 3\u20136<\/td><td>Walls, vertical surfaces, complex shapes<\/td><td>Air blast; good profile with air-blast equipment on any surface orientation<\/td><\/tr>\n<tr><td>Garnet (16\u201330 mesh)<\/td><td>CSP 2\u20135<\/td><td>Low-dust sites, sensitive locations<\/td><td>Lower dust; good for occupied building interior floor prep<\/td><\/tr>\n<tr><td>Crushed glass (16\u201330)<\/td><td>CSP 3\u20136<\/td><td>General concrete prep<\/td><td>Angular, recyclable, silica-free alternative to coal slag<\/td><\/tr>\n<tr><td>Coal slag (coarse)<\/td><td>CSP 4\u20137<\/td><td>Exterior infrastructure, bridges<\/td><td>Low cost for large outdoor areas; higher dust<\/td><\/tr>\n<\/tbody>\n<\/table><\/div>\n<\/section>\n\n<section id=\"hlh-cl-floor\">\n<h2 class=\"hlh-cl-h2\">Industrial Floor Coating Preparation<\/h2>\n<p>Industrial floor coatings \u2014 epoxy, polyurethane, methyl methacrylate (MMA), and cementitious urethane systems \u2014 represent the largest volume application of concrete surface preparation blasting. The CSP target depends on coating DFT: thin-film epoxy sealers (100\u2013200 \u00b5m DFT) typically require CSP 2\u20133; medium-build broadcast epoxy systems (500 \u00b5m\u20132 mm) require CSP 3\u20135; heavy-duty urethane mortar and polymer concrete systems (3\u201310 mm) require CSP 5\u20137 or higher.<\/p>\n<p>Shot blasting (centrifugal wheel blast on a self-propelled floor machine) is the most efficient method for large horizontal floor areas. For areas inaccessible to shot blast machines \u2014 perimeters, columns, pits, ramps \u2014 abrasive blast with aluminum oxide or garnet provides equivalent profile results with air-blast equipment. Ensure all existing coating, grease, oil, and curing compound is removed before measuring CSP, as these contaminants can mask laitance and give a false profile reading.<\/p>\n<\/section>\n\n<section id=\"hlh-cl-bridge\">\n<h2 class=\"hlh-cl-h2\">Bridge Decks &amp; Infrastructure<\/h2>\n<p>Concrete bridge deck blasting for overlay bonding or waterproof membrane installation requires aggressive surface profiles (CSP 5\u20138) to ensure mechanical interlocking between the existing deck surface and new overlay material. Coal slag coarse grade or aluminum oxide 24\u201336 grit at high pressure (90\u2013110 psi) is used for aggressive surface profiling. Environmental containment requirements for blasting over waterways or traffic must be addressed in the project planning \u2014 vacuum shroud equipment may be required to comply with particulate discharge regulations.<\/p>\n<\/section>\n\n<section id=\"hlh-cl-tank\">\n<h2 class=\"hlh-cl-h2\">Tank Linings &amp; Secondary Containment<\/h2>\n<p>Chemical storage tank linings and secondary containment coatings for hazardous materials require Sa 2.5 equivalent cleanliness and CSP 4\u20137 profiles to achieve the adhesion required by thick-film glass flake vinyl ester or epoxy novolac systems. Garnet is frequently specified for tank lining preparation in potable water tanks, food processing tanks, and pharmaceutical environments where media cleanliness and absence of heavy-metal contamination are specification requirements. For the full pipeline and tank preparation guide, see <a href=\"https:\/\/hlh-js.com\/resource\/blog\/abrasives-for-industrial-pipeline-coating-preparation\/\" target=\"_blank\" rel=\"noopener\">Pipeline Coating Preparation<\/a>.<\/p>\n<\/section>\n\n<section id=\"hlh-cl-tips\">\n<h2 class=\"hlh-cl-h2\">Technique Tips for Concrete Blasting<\/h2>\n<ul class=\"hlh-cl-ul\">\n  <li>Always perform a pull-off adhesion test on blasted concrete before committing to the coating system \u2014 substrate tensile strength below 1.5 N\/mm\u00b2 may indicate the need for concrete repair before coating<\/li>\n  <li>Measure surface profile with ICRI CSP comparison chips, not metal replica tape \u2014 the two scales are not equivalent on concrete<\/li>\n  <li>Allow freshly blasted concrete to fully dry before coating \u2014 moisture content above 4% typically causes epoxy adhesion failure<\/li>\n  <li>Check for rising damp (hydrostatic pressure) with a polythene sheet test before specifying coating type \u2014 unvented moisture requires breathable or moisture-tolerant primer systems<\/li>\n  <li>Vacuum blast equipment significantly reduces dust and spent media disposal volume on concrete \u2014 worth considering for large-area indoor projects<\/li>\n<\/ul>\n<\/section>\n\n<div class=\"hlh-cl-related\"><h3>Related Resources<\/h3>\n<div class=\"hlh-cl-related-grid\">\n  <a href=\"https:\/\/hlh-js.com\/resource\/blog\/sandblasting-abrasives-types-grit-sizes-selection-guide\/\" target=\"_blank\" rel=\"noopener\" class=\"hlh-cl-related-link\"><span>\ud83d\udcd6<\/span><div><strong>Complete Buyer&#8217;s Guide<\/strong><em>All abrasive types &amp; selection<\/em><\/div><\/a>\n  <a href=\"https:\/\/hlh-js.com\/resource\/blog\/aluminum-oxide-abrasive-for-sandblasting\/\" target=\"_blank\" rel=\"noopener\" class=\"hlh-cl-related-link\"><span>\u2b21<\/span><div><strong>Aluminum Oxide Guide<\/strong><em>For vertical &amp; complex concrete surfaces<\/em><\/div><\/a>\n  <a href=\"https:\/\/hlh-js.com\/resource\/blog\/garnet-sandblasting-abrasive\/\" target=\"_blank\" rel=\"noopener\" class=\"hlh-cl-related-link\"><span>\u2b21<\/span><div><strong>Garnet Guide<\/strong><em>Low-dust indoor floor prep<\/em><\/div><\/a>\n  <a href=\"https:\/\/hlh-js.com\/resource\/blog\/steel-grit-abrasives-for-sandblasting\/\" target=\"_blank\" rel=\"noopener\" class=\"hlh-cl-related-link\"><span>\u2b21<\/span><div><strong>Steel Grit Guide<\/strong><em>Wheel blast for large floor areas<\/em><\/div><\/a>\n  <a href=\"https:\/\/hlh-js.com\/resource\/blog\/abrasives-for-industrial-pipeline-coating-preparation\/\" target=\"_blank\" rel=\"noopener\" class=\"hlh-cl-related-link\"><span>\ud83d\udee2\ufe0f<\/span><div><strong>Pipeline &amp; Tank Prep<\/strong><em>Lining prep standards &amp; media<\/em><\/div><\/a>\n  <a href=\"https:\/\/hlh-js.com\/resource\/blog\/sandblasting-abrasives-grit-size-chart\/\" target=\"_blank\" rel=\"noopener\" class=\"hlh-cl-related-link\"><span>\ud83d\udcca<\/span><div><strong>Grit Size Chart<\/strong><em>CSP vs grit size reference<\/em><\/div><\/a>\n<\/div><\/div>\n\n<section id=\"hlh-cl-faq\">\n<h2 class=\"hlh-cl-h2\">FAQ<\/h2>\n<div class=\"hlh-cl-faq\">\n  <div class=\"hlh-cl-faq-item\"><button class=\"hlh-cl-faq-q\" onclick=\"hlhClFaq(this)\">What CSP level is needed for epoxy floor coating?<span class=\"hlh-cl-faq-icon\">+<\/span><\/button><div class=\"hlh-cl-faq-a\"><p>CSP requirements depend on coating DFT and system type. Thin epoxy sealers (100\u2013200 \u00b5m) typically specify CSP 2\u20133; medium-build broadcast systems (500 \u00b5m\u20132 mm) require CSP 3\u20135; heavy-duty systems require CSP 5+. Always confirm with the specific coating manufacturer&#8217;s technical data sheet, which will specify both the CSP range and the surface preparation method required to achieve valid coating warranty coverage.<\/p><\/div><\/div>\n  <div class=\"hlh-cl-faq-item\"><button class=\"hlh-cl-faq-q\" onclick=\"hlhClFaq(this)\">Can I use acid etching instead of blasting for concrete prep?<span class=\"hlh-cl-faq-icon\">+<\/span><\/button><div class=\"hlh-cl-faq-a\"><p>Acid etching (muriatic acid or phosphoric acid) can achieve approximately CSP 1\u20132, adequate only for penetrating sealers and very light surface treatments. For most industrial epoxy and urethane floor systems, acid etching does not produce adequate profile depth or remove sufficient laitance for reliable coating adhesion. Abrasive blasting or shot blasting is required for CSP 3 and above. Additionally, acid etching leaves surface residue that must be thoroughly neutralised and washed before coating \u2014 adding process complexity that blasting avoids.<\/p><\/div><\/div>\n<\/div>\n<\/section>\n\n<div class=\"hlh-cl-final-cta\">\n  <h2>Source Concrete Surface Prep Abrasives from Jiangsu Henglihong Technology<\/h2>\n  <p>Aluminum oxide, garnet, and steel grit in the grit sizes used by industrial flooring contractors and infrastructure maintenance teams worldwide. Bulk FCL pricing available.<\/p>\n  <div class=\"hlh-cl-cta-group\"><a href=\"https:\/\/hlh-js.com\/contact\/\" target=\"_blank\" rel=\"noopener\" class=\"hlh-cl-btn-primary\">Request a Quote<\/a><a href=\"https:\/\/hlh-js.com\/resource\/blog\/sandblasting-abrasives-bulk-supplier-wholesale\/\" target=\"_blank\" rel=\"noopener\" class=\"hlh-cl-btn-outline\">Wholesale Info \u2192<\/a><\/div>\n<\/div>\n<\/div>\n<script>function hlhClFaq(btn){var a=btn.nextElementSibling,open=btn.classList.contains('open');document.querySelectorAll('.hlh-cl-faq-q').forEach(function(b){b.classList.remove('open');if(b.nextElementSibling)b.nextElementSibling.style.display='none';});if(!open){btn.classList.add('open');a.style.display='block';}}\n<\/script>","protected":false},"excerpt":{"rendered":"<p>\u2190 Sandblasting Abrasives: Complete Buyer&#8217;s GuideBack to Pillar Page Series  [&#8230;]<\/p>","protected":false},"author":1,"featured_media":13007,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[62,175,138],"tags":[],"class_list":["post-12963","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","category-industry","category-resource"],"_links":{"self":[{"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/posts\/12963","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/comments?post=12963"}],"version-history":[{"count":2,"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/posts\/12963\/revisions"}],"predecessor-version":[{"id":12965,"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/posts\/12963\/revisions\/12965"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/media\/13007"}],"wp:attachment":[{"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/media?parent=12963"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/categories?post=12963"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/tags?post=12963"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}