Significance and Use
3.1 This guide is intended as a reference for those concerned with the inspection of thin- or thick-film coating application to concrete and masonry substrates. It does not cover the application of cement-type coatings. A checklist is included as Appendix X1.1. Many of the details covered may be in a specification for a particular project. A specification for coating projects should include the coatings to be used.
Scope
1.1 This guide is intended as an information aid to painting inspectors in carrying out the task efficiently. It includes the key elements of surface preparation, coatings application, and final approval for both field and shop work. The items should be selected that are pertinent to a particular job.
Note 1: For additional helpful information, refer to the following documents:
Manual of Concrete Practice ACI 515R American Concrete Institute2
Manual of Coating Work for Light Water Nuclear Power Plant Primary Containment and Other Safety Related Facilities3
C811 Practice for Surface Preparation of Concrete for Application of Chemical-Resistant Resin Monolithic Surfacings4
SSPC-PA Guide 3 - A Guide to Safety in Paint Application5
Steel Structures Painting Manual Vol. 1- Good Painting Practices5
Steel Structures Painting Manual Vol. 2 - Systems and Specifications5
Manufacturers Specifications and Instructions (made available to the inspector for reference to special requirements for proper application)
Material Safety Data Sheets (needed to insure that personnel take necessary precautions in handling hazardous materials). Available from Materials manufacturer.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of whomever uses this standard to consult and establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
1.4 This guide is arranged in the following order:
|
| Section | |
| Referenced Documents | 2 | |
|
| ASTM Standards | 2.1 |
|
| OSHA Standards | 2.2 |
|
| ICRI Standards | 2.3 |
|
| SSPC Standards | 2.4 |
| Significance and Use | 3 | |
| Preparation for Inspection | 4 | |
| Surface Preparation Methods and Requirements | 5 | |
|
| Surface Preparation | 5.1 |
|
| Factors Affecting Coating Performance | 5.2 |
|
| Surface Condition | 5.2.1 |
|
| Cleanliness | 5.2.2 |
|
| Moisture | 5.2.3 |
|
| Surface Preparation Procedures | 5.3 |
|
| Dry Surface Cleaning | 5.3.1 |
|
| Water and Steam Cleaning | 5.3.2 |
|
| Mechanical Tool Cleaning | 5.3.3 |
|
| Hand Tool Cleaning | 5.3.3.1 |
|
| Power Tool Cleaning | 5.3.3.2 |
|
| Scarifying Machines | 5.3.3.3 |
|
| Pre- and Post-Surface Preparation | 5.3.3.4 |
|
| Finished Surface | 5.3.3.5 |
|
| Blast Cleaning | 5.3.4 |
|
| Water Blast Cleaning | 5.3.5 |
|
| Acid Etching | 5.3.6 |
| Precautions in Preparing Unpainted and |
| |
|
| Previously Painted Surfaces | 5.4 |
| Inspection of Surfaces Prior to Field Painting | 5.5 | |
|
| New Construction | 5.5.1 |
|
| Maintenance Repainting | 5.5.2 |
| Cracks and Voids | 6 | |
|
| Cracks | 6.1 |
|
| Cracks in Concrete | 6.1.1 |
|
| Joints in Concrete | 6.1.2 |
|
| Voids | 6.2 |
|
| Recoat Intervals | 6.3 |
| Coating Storage and Handling | 7 | |
|
| Storage of Coating and Thinner | 7.1 |
|
| Mixing of Coatings | 7.2 |
|
| Thinning | 7.3 |
|
| Initial Samples | 7.3.1 |
|
| Thinning of Coating | 7.3.2 |
|
| Sampling of Thinned Coating | 7.3.3 |
|
| Heating of Coating | 7.4 |
| Weather Considerations | 8 | |
|
| Drying | 8.1 |
|
| Low Temperature | 8.2 |
|
| High Temperature | 8.3 |
|
| Moisture | 8.4 |
|
| Wind | 8.5 |
| Coating Application | 9 | |
|
| Residual Contaminants | 9.1 |
|
| Quality Assurance | 9.2 |
|
| Film Defects | 9.2.1 |
|
| Brush Application | 9.3 |
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| Spray Application | 9.4 |
|
| Roller Application | 9.5 |
|
| Miscellaneous Methods | 9.6 |
|
| Rate of Application | 9.7 |
|
| Additional Considerations | 10 |
|
| Ventilation | 10.1 |
|
| Painting Schedule | 10.2 |
|
| Film Integrity | 10.3 |
|
| Recoat Time | 10.4 |
|
| Coating System Failure | 10.5 |
| Inspection Equipment | 11 | |
|
| General | 11.1 |
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| Adhesion of Existing Coating | 11.1.1 |
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| Portable Pull-Off Adhesion | 11.1.2 |
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| Field Inspection Equipment | 11.2 |
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| Drying and Curing Times | 11.2.1 |
|
| Thermometers | 11.2.1.1 |
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| Relative Humidity and Dew Point | 11.2.1.2 |
|
| Viscosity Cups | 11.2.2 |
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| Wet-Film Thickness Gages | 11.2.4 |
|
| Interchemical Gage | 11.2.4.1 |
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| Notched Gage | 11.2.4.2 |
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| Dry-Film Thickness Gages | 11.2.5 |
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| Destructive Thickness Gage | 11.2.5.1 |
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| Nondestructive Film Thickness Gages | 11.2.5.2 |
|
| Discontinuity (Holiday) Tester | 11.3 |
| Inspection Checklist | Appendix X1 | |
