This standard is issued under the fixed designation D ; the number 1 This practice is under the jurisdiction of ASTM Committee D on Protective. ASTM D Standard Practice for Surface Cleaning Concrete for Coating. ASTM D (Plastic sheet test): Place plastic sheet on concrete stab for 24 hours. o ASTM-D Standard Practice for Surface Cleaning Concrete for.
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Maintenance painting will frequently not permit or require complete removal of all old coatings prior to repainting. Clean off the paste residue. Be advised that any coatings left on the surface to be painted may compromise the service length of the system.
Allow to dry and cure thoroughly for at least 30 days prior to painting. Concrete curing compounds, hardeners, and form release agents may not be compatible with recommended coatings. When viewed without magnification, a Brush-Off Blast Cleaned surface should be free of any visible grease, oil, dust, dirt, asm mill scale, loose paint, and loose rust.
All of these steps were important to ensure the paint finish was smooth, uniform in color, and resilient. Thorough washing with an abrasive cleanser will clean and dull in one operation, or, wash thoroughly and dull by sanding. Here is a summary of some of the published standards with which installers and specifiers of corrosion protection linings should be familiar.
High-pressure water blasting is commonly used to clean substrates. Make sure all visible asgm, oil, salts, and soluble welding residues have been removed prior to r4258 tool cleaning by the methods outlined in SSPC-SP 1. Adtm must be clean and d42588. Ensure that the surface is clean and free of any loose stucco, and that surface pH asm between 6 d42588 9. Treat textured, soft, porous, or powdery plaster with a solution of 1 pint household vinegar to 1 gallon of water.
Prime and paint as soon as possible after surface prep. Already Subscribed to this document. Profiled Increasing the surface area of the substrate by imparting a profile with some tooth gives lining systems more to grab on to.
For concrete and steel substrates, a prepared surface is typically one that is clean, dry, structurally sound, and possesses a certain surface profile—the four pillars of good surface preparation. Make sure all visible grease, oil, salts, and soluble welding residues have been removed before hand tool cleaning by the methods outlined in SSPC-SP 1.
Rinse with clear water and allow to dry. Glossy surfaces should be sanded dull. Surface Preparation Proper surface preparation can improve the outcome of your coating system. Patch all nail holes and imperfections with a wood filler or putty and sand smooth.
ASTM D – 05() – Standard Practice for Surface Cleaning Concrete for Coating
Adherent mill scale, paint, and rust are not able to be removed by this process. Rinse carefully and allow to dry.
For exterior surfaces, spackle with exterior grade compounds. To avoid premature lining failures resulting from improper surface preparation, lining specifiers, applicators, and inspectors need to be familiar with these industry standards for surface preparation and to adhere to their principles in practice.
Surface must be free of laitance, concrete dust, dirt, form release agents, moisture curing membranes, loose cement, and hardeners. Check for compatibility by applying a test patch of the recommended coating system, covering at least 2 to 3 square feet.
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Standard – Standard Practice for Surface Cleaning Concrete for Coating ASTM D –
As the voice of the U. Ensure that knots and pitch streaks are scraped, sanded, and spot primed before a full priming coat is applied. To test compatibility, apply a square foot area with the coating system, and allow concrete to dry one week before testing adhesion per ASTM D Your Alert Profile lists the documents that will be monitored. When viewed without magnification, a Near-White Blast Cleaned surface should be free of any visible grease, oil, dust, dirt, mill scale, paint, rust, oxides, corrosion products, and other foreign matter, with the exception of staining.
Damaged areas must be repaired with an appropriate patching material. Vacuum cleaning, broom cleaning, water cleaning, air blast cleaning, and steam cleaning are suitable as outlined in ASTM D Use an appropriate primer to spot prime any bare ares.
Rooms must be heated in cold, damp weather. There was so much to do before I ever opened a can of paint. Procedures include broom cleaning, vacuum cleaning, air blast cleaning, water cleaning, detergent water cleaning, and steam cleaning.
Mill scale and rust cannot be removed by solvent cleaning. Visible deposits of grease or oil must be removed prior to blast cleaning by any method specified in SSPC-SP 1 or other agreed upon methods.
If the document is revised or amended, you will be notified by email.
Please first verify your email before subscribing to alerts. Any existing checked or peeling paint should be scraped and sanded d425 a sound surface.
As critical as these steps are, it should come as no surprise that there is a wealth of technical standards available from organizations such as NACEASTMand SSPC which address many aspects of steel and concrete surface preparation. Need more than one copy?
ASTM D4258 – 05(2017)
If necessary, pressure clean with dd4258 minimum of psi to remove all dirt, dust, oil, grease, laitance, loose particles, foreign material, and peeling or defective coatings. Proper surface preparation can improve the outcome of your coating system. Rags and cleaning solution should be changed frequently so that deposits of oil and grease are not spread over additional areas in the cleaning process.