SSPC PA 14-2012 Application of Thick Film Polyurea and Polyurethane Coatings to Concrete and Steel Using Plural-Component Equipment.pdf
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1、SSPC-PA 14September 25, 20121SSPC: The Society for Protective CoatingsCoating Application Standard No. 14 Application of Thick Film Polyurea and Polyurethane Coatings to Concrete and Steel Using Plural-Component Equipment1. ScopeThis standard provides requirements for the field appli-cation of polyu
2、rea, polyurethane, or polyurea/polyurethane hybrid thick film coatings to concrete or steel surfaces using plural component spray equipment. In this standard, thick film coatings are defined as coatings specified to have greater than 500 micrometers m (20 mils) dry film thickness. Surface preparatio
3、n, pretreatments, machinery requirements and parameters are addressed in this standard.2. Referenced Standards 2.1 The latest issue, revision, or amendment of the refer-enced documents in effect on the date of invitation to bid shall govern unless otherwise specified. 2.2 If there is a conflict betw
4、een the requirements of any of the referenced documents and this standard, the require-ments of this standard shall prevail. 2.3 SSPC STANDARDS AND JOINT STANDARDS:PA 9 Measurement of Dry Coating Thick-ness on Cementitious Surfaces Using Ultrasonic Gages2.4 ASTM INTERNATIONAL STANDARDS1C 805 Standar
5、d Test Method for Rebound Number of Hardened ConcreteD 4138 Standard Practices for Measurement of Dry Film Thickness of Protec-tive Coating Systems by Destructive, Cross-Sectioning MeansD 4417 Standard Test Methods for Field Measurement of Surface Profile of Blast Cleaned SteelD 4787 Standard Practi
6、ce for Continuity Veri-fication of Liquid or Sheet Linings Applied to Concrete Substrates D 6132 Standard Test Method for Nonde-structive Measurement of Dry Film Thickness of Applied Organic Coatings Using an Ultrasonic Gage1 ASTM International, 100 Barr Harbor Drive, West Conshohocken, PA 19428-295
7、9. For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standards volume infor-mation, refer to the standards Document Summary page on the ASTM website.D 7091 Standard Practice for Nondestructive Measurement
8、 of Dry Film Thickness of Nonmagnetic Coatings Applied to Ferrous Metals and Nonmagnetic, Nonconductive Coatings Applied to Non-Ferrous Metals2.5 NACE INTERNATIONAL STANDARDS:2SP0188 Discontinuity (Holiday) Testing of New Protective Coatings on Conductive Surfaces2.6 INTERNATIONAL CONCRETE REPAIR IN
9、STITUTE GUIDELINE3Guideline 310.2 Selecting and Specifying Concrete Surface Preparation for Sealers, Coat-ings, and Polymer Overlays3. DefinitionsConcrete: A composite material that consists essentially of a binding medium within which are embedded particles or fragments of aggregate, usually a comb
10、ination of fine aggre-gate and coarse aggregate; in Portland cement concrete, the binder is a mixture of Portland cement and water.Outgassing: The spontaneous discharge of air or mois-ture vapor from concrete. Pores: Small interconnected voids, such as in concrete, which allow fluids to penetrate an
11、 otherwise impervious material.4. Qualifications of Craftworkers The contractor shall provide documentation that the craftworker(s) applying the coating have received formal training on proper plural-component coating application tech-niques and that the operator(s) of the spray pump(s) have receive
12、d formal training on material ratio, material viscosity, mixing, ambient conditions for application and curing, product data sheets, material safety data sheets, proper setup and monitoring of the plural-component pump(s) being used, and 2 NACE International, 1440 South Creek, Houston, TX 77084 phon
13、e: 281-228-6200. NACE standards may be obtained online from http:/www.nace.org3 ICRI International Concrete Repair Institute, 3166 S. River Road, Suite 132, Des Plaines, IL 60018, phone: 847-827-0830. ICRI standards may be obtained online from http:/www.icri.orgSSPC-PA 14September 25, 20122troublesh
14、ooting basics (see Note 15.1). Formal training shall include a written exam and hands-on assessment.45. Surface Condition of Concrete Prior to Application of Coating5.1 SURFACE SOUNDNESS: Before application of coating, the concrete substrate shall be sound and solid as determined by ASTM C 805 (see
15、Note 15.2). Surface defects such as bugholes, voids, and cracks shall be repaired as specified prior to coating application.5.2 SURFACE CLEANLINESS: When viewed without magnification, the concrete surface shall be free of visible dust, dirt, greases, and oils, contaminants, laitance, and loosely adh
16、ering concrete. See Note 15.3 for information regarding requirements for nonvisible contaminants.5.3 PROFILE: Unless otherwise specified, the surface roughness shall be within CSP range 2-6 when evaluated in accordance with ICRI 310.2.5.4 JOINTS: Unless otherwise specified, coatings and surfacings s
17、hall not be placed over functional joints (see Note 15.4).6. Surface Condition of Steel Prior to Application of Coating6.1 SURFACE CLEANLINESS6.1.1 Visible Contaminants: Immediately prior to coating application, the steel surface shall meet specified require-ments for visible surface cleanliness. Th
18、e steel surface shall be prepared in accordance with project requirements for surface cleanliness. If these requirements are not provided in the project specification, the surface shall meet the require-ments of the manufacturers product data sheet for the coating to be applied.6.1.2 Nonvisible Cont
19、aminants: Immediately prior to coating, the steel surface shall meet the specified require-ments for maximum levels of nonvisible contaminants (see Note 15.3). 6.2 SURFACE PROFILE: Unless otherwise specified, a minimum profile of 76 m (3 mils) measured in accordance with ASTM D 4417 Method B is requ
20、ired for thick film coatings5. 7. Coating Materials Handling7.1 The proper PPE shall be utilized when handling the individual components of the system as well as during mixing and application. Polyurea and/or polyurethane coatings are formed from isocyanate and resin blend components. The 4 Note tha
21、t successful completion of SSPCs Marine Plural Component Program (MPCAC, C14) will satisfy this requirement. Other training courses covering the material listed in Section 4.1 may be available5 SSPC-PA 17, Method for Determining Conformance to Steel Profile/Surface Rougness/Peak Count Requirements,
22、references ASTM D 4417 and contains additional acceptance criteria.isocyanate components are known to be skin and respiratory irritants and sensitizers, and the aromatic amines are consid-ered to be potential carcinogens. The resin blend component is frequently corrosive in nature, and capable of ca
23、using other adverse health effects. Refer to material manufacturers Mate-rial Safety Data Sheets for information on proper PPE and additional safety information. SSPC-TU 8 also provides addi-tional information.7.2 All coating products shall be delivered to the work site in original, unopened contain
24、ers with labels intact. Minor damage to containers is acceptable if the container has not been punctured or crimped or has had the lid seal broken. Each product shall have a readily accessible manufacturers material safety data sheet. 7.3 Each container shall be clearly marked or labeled to show coa
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