Значение и использование

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.

Область применения

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 Institute

Manual of Coating Work for Light Water Nuclear Power Plant Primary Containment and Other Safety Related Facilities

C 811 Practice for Surface Preparation of Concrete for Application of Chemical-Resistant Resin Monolithic Surfacings

SSPC-PA Guide 3 - A Guide to Safety in Paint Application

Steel Structures Painting Manual Vol. 1- Good Painting Practices

Steel Structures Painting Manual Vol. 2 - Systems and Specifications

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 Documents2 ASTM Standards2.1 OSHA Standards2.2 ICRI Standards2.3 SSPC Standards2.4 Significance and Use 3 Preparation for Inspection 4 Surface Preparation Methods and Requirements5 Surface Preparation 5.1 Factors Affecting Coating Performance5.2 Surface Condition 5.2.1 Cleanliness5.2.2 Moisture5.2.3 Surface Preparation Procedures5.3 Dry Surface Cleaning5.3.1 Water and Steam Cleaning5.3.2 Mechanical Tool Cleaning5.3.3 Hand Tool Cleaning5.3.3.1 Power Tool Cleaning5.3.3.2 Scarifying Machines5.3.3.3 Pre- and Post-Surface Preparation5.3.3.4 Finished Surface5.3.3.5 Blast Cleaning5.3.4 Water Blast Cleaning5.3.5 Acid Etching5.3.6 Precautions in Preparing Unpainted and Previously Painted Surfaces5.4 Inspection of Surfaces Prior to Field Painting5.5 New Construction5.5.1 Maintenance Repainting 5.5.2 Cracks and Voids6 Cracks6.1 Cracks in Concrete6.1.1 Joints in Concrete6.1.2 Voids6.2 Recoat Intervals6.3 Coating Storage and Handling 7 Storage of Coating and Thinner7.1 Mixing of Coatings 7.2 Thinning7.3 Initial Samples7.3.1 Thinning of Coating7.3.2 Sampling of Thinned Coating7.3.3 Heating of Coating7.4 Weather Considerations8 Drying8.1 Low Temperature8.2 High Temperature8.3 Moisture8.4 Wind8.5 Coating Application9 Residual Contaminants9.1 Quality Assurance9.2 Film Defects9.2.1 Brush Application9.3 Spray Application 9.4 Roller Application 9.5 Miscellaneous Methods9.6 Rate of Application 9.7 Additional Considerations10 Ventilation10.1 Painting Schedule10.2 Film Integrity10.3 Recoat Time10.4 Coating System Failure 10.5 Inspection Equipment11 General11.1 Adhesion of Existing Coating11.1.1 Portable Pull-Off Adhesion11.1.2 Field Inspection Equipment11.2 Drying and Curing Times11.2.1 Thermometers11.2.1.1 Relative Humidity and Dew Point11.2.1.2 Viscosity Cups11.2.2 Wet-Film Thickness Gages11.2.4 Interchemical Gage11.2.4.1 Notched Gage11.2.4.2 Dry-Film Thickness Gages11.2.5 Destructive Thickness Gage11.2.5.1 Nondestructive Film Thickness Gages11.2.5.2 Discontinuity (Holiday) Tester11.3 Inspection ChecklistAppendix X1