{"id":13206,"date":"2026-05-28T01:50:17","date_gmt":"2026-05-28T01:50:17","guid":{"rendered":"https:\/\/hlh-js.com\/?p=13206"},"modified":"2026-05-28T01:50:17","modified_gmt":"2026-05-28T01:50:17","slug":"sand-blasted-concrete-surface-preparation-for-coating-decorative-exposure","status":"publish","type":"post","link":"https:\/\/hlh-js.com\/ru\/resource\/\u0431\u043b\u043e\u0433\/sand-blasted-concrete-surface-preparation-for-coating-decorative-exposure\/","title":{"rendered":"Sand Blasted Concrete: Surface Preparation for Coating &amp; Decorative Exposure"},"content":{"rendered":"<div class=\"hlh-art\">\n\n<style>\n  .hlh-art {\n    font-family: -apple-system, BlinkMacSystemFont, \"Segoe UI\", \"Helvetica Neue\", Arial, sans-serif;\n    color: #1f2a37; line-height: 1.72; font-size: 16.5px;\n    max-width: 1080px; margin: 0 auto; padding: 0 4px; box-sizing: border-box;\n  }\n  .hlh-art *, .hlh-art *::before, .hlh-art *::after { box-sizing: border-box; }\n  .hlh-art h1, .hlh-art h2, .hlh-art h3, .hlh-art h4 {\n    color: #0f3057; 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border: none; margin-top: 0; font-size: 1.45rem; position: relative; padding: 0; }\n  .hlh-art-cta p { color: #d6dee8; max-width: 620px; margin: 8px auto 22px; position: relative; }\n  .hlh-art-cta-button {\n    display: inline-block; background: #e8782e; color: #fff !important;\n    padding: 13px 32px; border-radius: 50px; font-weight: 700;\n    font-size: 0.98rem; border: none !important;\n    box-shadow: 0 8px 22px rgba(232,120,46,0.35); position: relative;\n    transition: all 0.2s ease;\n  }\n  .hlh-art-cta-button:hover { background: #c75d12; color: #fff !important; transform: translateY(-2px); }\n\n  .hlh-art-pillarback {\n    background: #eef3f9; border-left: 4px solid #0f3057;\n    padding: 16px 22px; border-radius: 6px; margin: 24px 0;\n    font-size: 0.95rem;\n  }\n  .hlh-art-pillarback strong { color: #0f3057; }\n\n  @media (max-width: 780px) {\n    .hlh-art { font-size: 16px; }\n    .hlh-art h1, .hlh-art-hero h1 { font-size: 1.7rem; }\n    .hlh-art h2 { font-size: 1.3rem; }\n    .hlh-art-hero { padding: 30px 22px; }\n    .hlh-art-toc ol { columns: 1; }\n    .hlh-art-steps { grid-template-columns: repeat(2, 1fr); }\n    .hlh-art-grid2, .hlh-art-grid3, .hlh-art-related-grid { grid-template-columns: 1fr; }\n    .hlh-art-cta { padding: 30px 22px; }\n  }\n<\/style>\n\n<section class=\"hlh-art-hero\">\n  <div class=\"hlh-art-meta-row\">\n    <span class=\"hlh-art-tag\">Concrete Preparation<\/span>\n    <span class=\"hlh-art-date\">Published &middot; May 2026<\/span>\n  <\/div>\n  <h1>Sand Blasted Concrete: Surface Preparation for Coating &#038; Decorative Exposure<\/h1>\n  <p class=\"hlh-art-lede\">Sand blasting concrete removes laitance, exposes aggregate, and opens the surface for sealers, epoxy coatings, and decorative resin floors. This guide covers exposure levels, equipment, and the surface preparation specifications used in industrial and decorative concrete work.<\/p>\n<\/section>\n\n<aside class=\"hlh-art-summary\">\n  <h2>Key Takeaways<\/h2>\n  <ul>\n    <li>Three exposure levels: light (cement paste removal), medium (fine aggregate exposed), heavy (coarse aggregate exposed for decorative effect).<\/li>\n    <li>ICRI CSP profiles 3\u20137 cover the blasted concrete preparation range.<\/li>\n    <li>Wet blasting is required in many indoor and urban environments to control silica dust.<\/li>\n    <li>Decorative aggregate exposure is a major architectural application for blasted concrete.<\/li>\n  <\/ul>\n<\/aside>\n\n<nav class=\"hlh-art-toc\" aria-label=\"\u041e\u0433\u043b\u0430\u0432\u043b\u0435\u043d\u0438\u0435\">\n  <h2>Table of Contents<\/h2>\n  <ol>\n    <li><a href=\"#intro\">Why Blast Concrete?<\/a><\/li>\n    <li><a href=\"#exposure-levels\">Three Exposure Levels<\/a><\/li>\n    <li><a href=\"#icri-csp\">ICRI CSP Profile Standards<\/a><\/li>\n    <li><a href=\"#equipment\">Equipment for Concrete Blasting<\/a><\/li>\n    <li><a href=\"#coating-prep\">Concrete Coating Preparation Workflow<\/a><\/li>\n    <li><a href=\"#decorative\">Decorative Aggregate Exposure<\/a><\/li>\n  <\/ol>\n<\/nav>\n\n<section id=\"intro\" class=\"hlh-art-section\">\n  <h2>Why Blast Concrete?<\/h2>\n  <p>Concrete sandblasting serves two distinct purposes: <strong>surface preparation<\/strong> for coatings and resin systems, and <strong>decorative aggregate exposure<\/strong> for architectural effect. The process mechanics are the same; the depth and intent differ.<\/p>\n\n<p>For surface preparation, the goal is removing the weak laitance layer at the concrete surface and opening porosity so coatings can mechanically interlock. For decorative work, the goal is removing enough cement paste to expose the aggregate in a controlled aesthetic pattern.<\/p>\n\n<p>For the general process framework, see the <a href=\"https:\/\/hlh-js.com\/resource\/blog\/sand-blasted-surface\/\" target=\"_blank\" rel=\"noopener\">pillar guide on sand blasted surface<\/a>.<\/p>\n<\/section>\n\n<section id=\"exposure-levels\" class=\"hlh-art-section\">\n  <h2>Three Exposure Levels<\/h2>\n  <div class=\"hlh-art-grid3\">\n  <div class=\"hlh-art-card\">\n    <h4>Light Blast<\/h4>\n    <p>Removes only the cement paste and laitance. Surface reads as uniform matte concrete with no aggregate visible. ICRI CSP 3\u20134. Used for coating prep, epoxy floors.<\/p>\n  <\/div>\n  <div class=\"hlh-art-card accent\">\n    <h4>Medium Blast<\/h4>\n    <p>Exposes fine aggregate (sand). Surface has visible texture with mineral grain showing. ICRI CSP 5\u20136. Used for heavy industrial coatings, decorative sandblast.<\/p>\n  <\/div>\n  <div class=\"hlh-art-card\">\n    <h4>Heavy Blast<\/h4>\n    <p>Exposes coarse aggregate (gravel, stone). Architectural decorative effect with full 3D texture. ICRI CSP 7+. Used for decorative architectural panels, exposed aggregate walls.<\/p>\n  <\/div>\n<\/div>\n<\/section>\n\n<section id=\"icri-csp\" class=\"hlh-art-section\">\n  <h2>ICRI CSP Profile Standards<\/h2>\n  <p>The International Concrete Repair Institute (ICRI) publishes Technical Guideline 310.2R, which defines Concrete Surface Profile (CSP) numbers from CSP 1 (smooth, sealed) through CSP 10 (very rough, hand-chipped). Sandblasting typically produces:<\/p>\n\n<div class=\"hlh-art-table-wrap\">\n<table>\n  <thead><tr><th>CSP<\/th><th>Profile<\/th><th>Sandblasting Process<\/th><\/tr><\/thead>\n  <tbody>\n    <tr><td>CSP 3<\/td><td>Light shotblast<\/td><td>Light sandblast with fine media<\/td><\/tr>\n    <tr><td>CSP 4<\/td><td>Light scarification<\/td><td>Standard light sandblast<\/td><\/tr>\n    <tr><td>CSP 5<\/td><td>Medium shotblast<\/td><td>Medium sandblast, aggregate visible<\/td><\/tr>\n    <tr><td>CSP 6<\/td><td>Medium scarification<\/td><td>Deeper sandblast<\/td><\/tr>\n    <tr><td>CSP 7<\/td><td>Heavy abrasive blast<\/td><td>Heavy sandblast, coarse aggregate exposed<\/td><\/tr>\n  <\/tbody>\n<\/table>\n<\/div>\n\n<p>The required CSP is specified by the coating manufacturer&#8217;s data sheet. For example, thin epoxy floor coatings typically require CSP 3\u20134, high-build polyurethane requires CSP 4\u20135, and methyl methacrylate (MMA) overlays require CSP 5\u20136.<\/p>\n<\/section>\n\n<section id=\"equipment\" class=\"hlh-art-section\">\n  <h2>Equipment for Concrete Blasting<\/h2>\n  <ul>\n  <li><strong>Dry blasting cabinets<\/strong> \u2014 small areas, repair work; require dust collection.<\/li>\n  <li><strong>Open-nozzle dry blasting<\/strong> \u2014 outdoor large-area work; high dust output.<\/li>\n  <li><strong>Wet abrasive blasting<\/strong> \u2014 water injection suppresses dust; mandatory in many indoor and urban environments.<\/li>\n  <li><strong>Vapor abrasive blasting<\/strong> \u2014 fine water mist with abrasive; combines dust suppression with controlled wetness.<\/li>\n  <li><strong>Vacuum blast units<\/strong> \u2014 closed-loop systems for indoor work; expensive but eliminate containment.<\/li>\n  <li><strong>Centrifugal wheel walk-behind units<\/strong> \u2014 for floor preparation; high productivity on flat surfaces.<\/li>\n<\/ul>\n\n<p>Wet methods are increasingly mandated where indoor or urban work creates silica dust hazards. The regulatory context is covered in our reference on <a href=\"https:\/\/hlh-js.com\/resource\/blog\/osha-silica-rule-eco-friendly-alternatives-to-silica-sand-for-blasting\/\" target=\"_blank\" rel=\"noopener\">the OSHA silica rule<\/a> \u2014 particularly relevant because concrete dust itself contains respirable crystalline silica from the cement and aggregate.<\/p>\n<\/section>\n\n<section id=\"coating-prep\" class=\"hlh-art-section\">\n  <h2>Concrete Coating Preparation Workflow<\/h2>\n  <div class=\"hlh-art-steps\">\n  <div class=\"hlh-art-step\">\n    <div class=\"hlh-art-step-num\">1<\/div>\n    <div class=\"hlh-art-step-title\">Cure<\/div>\n    <div class=\"hlh-art-step-desc\">Concrete must be fully cured (28 days minimum) before blasting and coating.<\/div>\n  <\/div>\n  <div class=\"hlh-art-step\">\n    <div class=\"hlh-art-step-num\">2<\/div>\n    <div class=\"hlh-art-step-title\">Clean<\/div>\n    <div class=\"hlh-art-step-desc\">Remove oils, curing compounds, and surface contaminants by power wash or chemical degreasing.<\/div>\n  <\/div>\n  <div class=\"hlh-art-step\">\n    <div class=\"hlh-art-step-num\">3<\/div>\n    <div class=\"hlh-art-step-title\">Blast<\/div>\n    <div class=\"hlh-art-step-desc\">Sandblast to target ICRI CSP. Aluminum oxide or steel grit; coal slag for single-use.<\/div>\n  <\/div>\n  <div class=\"hlh-art-step\">\n    <div class=\"hlh-art-step-num\">4<\/div>\n    <div class=\"hlh-art-step-title\">Vacuum<\/div>\n    <div class=\"hlh-art-step-desc\">Vacuum the surface to remove spent media and dust before coating application.<\/div>\n  <\/div>\n<\/div>\n<\/section>\n\n<section id=\"decorative\" class=\"hlh-art-section\">\n  <h2>Decorative Aggregate Exposure<\/h2>\n  <p>Architectural decorative blasting is a distinct discipline. Common applications:<\/p>\n\n<ul>\n  <li><strong>Exposed aggregate walls<\/strong> \u2014 heavy blasting reveals decorative aggregate (granite, marble, river stone) embedded in the concrete mix.<\/li>\n  <li><strong>Sandblasted concrete countertops<\/strong> \u2014 light to medium blasting produces a soft tactile matte finish.<\/li>\n  <li><strong>Architectural facade panels<\/strong> \u2014 patterned masking with selective blasting creates relief designs.<\/li>\n  <li><strong>Memorial and signage work<\/strong> \u2014 deep stencil-masked blasting produces lettering and imagery on monumental concrete.<\/li>\n<\/ul>\n\n<p>Decorative work typically uses finer media (#36\u2013#80 aluminum oxide) for controlled aesthetic effect, versus the coarser media used for coating prep.<\/p>\n<\/section>\n\n<aside class=\"hlh-art-pillarback\">\n  <strong>Looking for the complete picture?<\/strong> This article is part of our broader resource on sand blasted surface specification, standards, and applications. Read the full <a href=\"https:\/\/hlh-js.com\/resource\/blog\/sand-blasted-surface\/\" target=\"_blank\" rel=\"noopener\">pillar guide to sand blasted surface<\/a> for the complete process, Ra\/Rz reference, four-standard cross-reference, and material-by-material guidance.\n<\/aside>\n\n<section class=\"hlh-art-related\">\n  <h3>Related Articles<\/h3>\n  <div class=\"hlh-art-related-grid\">\n    <div class=\"hlh-art-related-card\">\n      <a href=\"https:\/\/hlh-js.com\/resource\/blog\/osha-silica-rule-eco-friendly-alternatives-to-silica-sand-for-blasting\/\" target=\"_blank\" rel=\"noopener\">OSHA Silica Rule &#038; Eco-Friendly Alternatives<\/a>\n    <\/div>\n    <div class=\"hlh-art-related-card\">\n      <a href=\"https:\/\/hlh-js.com\/resource\/blog\/anchor-pattern-specifications-how-to-match-profile-depth-to-coating-dft\/\" target=\"_blank\" rel=\"noopener\">Anchor Pattern Specifications<\/a>\n    <\/div>\n    <div class=\"hlh-art-related-card\">\n      <a href=\"https:\/\/hlh-js.com\/resource\/blog\/sand-blasted-glass-etching-frosting-decorative-architectural-applications\/\" target=\"_blank\" rel=\"noopener\">Sand Blasted Glass: Etching, Frosting &#038; Decorative Applications<\/a>\n    <\/div>\n    <div class=\"hlh-art-related-card\">\n      <a href=\"https:\/\/hlh-js.com\/resource\/blog\/sand-blasted-surface-cost-guide-per-square-meter-pricing-by-region-method\/\" target=\"_blank\" rel=\"noopener\">Sand Blasted Surface Cost Guide<\/a>\n    <\/div>\n  <\/div>\n<\/section>\n\n<section id=\"faq\" class=\"hlh-art-section hlh-art-faq\">\n  <h2>\u0427\u0430\u0441\u0442\u043e \u0437\u0430\u0434\u0430\u0432\u0430\u0435\u043c\u044b\u0435 \u0432\u043e\u043f\u0440\u043e\u0441\u044b<\/h2>\n  <details>\n    <summary>Can you sandblast concrete?<\/summary>\n    <div class=\"hlh-art-faq-body\"><p>Yes. Concrete sandblasting is widely used for surface preparation before coating and for decorative aggregate exposure. The process is similar to steel sandblasting but uses different media and produces different profile characteristics.<\/p><\/div>\n  <\/details>\n  <details>\n    <summary>What is ICRI CSP?<\/summary>\n    <div class=\"hlh-art-faq-body\"><p>The Concrete Surface Profile (CSP) numbering system from the International Concrete Repair Institute, ranging from CSP 1 (smooth) to CSP 10 (very rough). Sandblasting typically produces CSP 3\u20137 depending on aggression.<\/p><\/div>\n  <\/details>\n  <details>\n    <summary>Do I need to seal sandblasted concrete?<\/summary>\n    <div class=\"hlh-art-faq-body\"><p>For decorative aesthetic exposure, sealing protects against staining and absorption. For coating preparation, the blasted surface is typically coated within hours and no sealer is used.<\/p><\/div>\n  <\/details>\n  <details>\n    <summary>Is dust from sandblasting concrete dangerous?<\/summary>\n    <div class=\"hlh-art-faq-body\"><p>Yes. Concrete dust contains respirable crystalline silica from cement and aggregate, posing a silicosis hazard even when non-silica media is used. Wet blasting or vacuum recovery systems are commonly mandated. Operators require supplied-air respirators.<\/p><\/div>\n  <\/details>\n  <details>\n    <summary>How long does sandblasted concrete take to cure before coating?<\/summary>\n    <div class=\"hlh-art-faq-body\"><p>Concrete must be fully cured (28 days minimum) before blasting and coating. The blasted surface should be coated within 24 hours to avoid contamination and carbonation that would reduce coating adhesion.<\/p><\/div>\n  <\/details>\n<\/section>\n\n<section class=\"hlh-art-cta\">\n  <h2>Request an Abrasive Blasting Media Sample<\/h2>\n  <p>Jiangsu Henglihong Technology Co., Ltd. supplies certified aluminum oxide, garnet, glass bead, steel grit, and steel shot to global industrial buyers. Request a sample with full batch documentation for technical evaluation.<\/p>\n  <a class=\"hlh-art-cta-button\" href=\"https:\/\/hlh-js.com\/contact\/\" target=\"_blank\" rel=\"noopener\">Request a Sample &rarr;<\/a>\n<\/section>\n\n<script type=\"application\/ld+json\">{\n    \"@context\": \"https:\\\/\\\/schema.org\",\n    \"@graph\": [\n        {\n            \"@type\": \"Article\",\n            \"headline\": \"Sand Blasted Concrete: Surface Preparation for Coating & Decorative Exposure\",\n            \"description\": \"Sand blasting concrete removes laitance, exposes aggregate, and opens the surface for sealers, epoxy coatings, and decorative resin floors. This guide covers exposure levels, equipment, and the surface preparation specifications used in industrial and decorative concrete work.\",\n            \"datePublished\": \"2026-05-01\",\n            \"dateModified\": \"2026-05-01\",\n            \"author\": {\n                \"@type\": \"Organization\",\n                \"name\": \"Jiangsu Henglihong Technology Co., Ltd.\",\n                \"url\": \"https:\\\/\\\/hlh-js.com\\\/\"\n            },\n            \"publisher\": {\n                \"@type\": \"Organization\",\n                \"name\": \"Jiangsu Henglihong Technology Co., Ltd.\",\n                \"url\": \"https:\\\/\\\/hlh-js.com\\\/\"\n            },\n            \"mainEntityOfPage\": \"https:\\\/\\\/hlh-js.com\\\/resource\\\/blog\\\/sand-blasted-concrete-surface-preparation-for-coating-decorative-exposure\\\/\"\n        },\n        {\n            \"@type\": \"FAQPage\",\n            \"mainEntity\": [\n                {\n                    \"@type\": \"Question\",\n                    \"name\": \"Can you sandblast concrete?\",\n                    \"acceptedAnswer\": {\n                        \"@type\": \"Answer\",\n                        \"text\": \"Yes. 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