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ASTM C647-2019 pdf free download

ASTM C647-2019 pdf free download.Standard Guide to Properties and Tests of Mastics and Coating Finishes for Thermal Insulation
3. Terminology
3.1 Terminology C168 shall be considered as applying to the terms used in this specification. 3.2 General Definitions: 3.2.1 application properties—properties that influence or affect the effective installation of finishes. 3.2.2 coating—a liquid or semiliquid protective finish ca- pable of application to thermal insulation or other surfaces, usually by brush or spray, in moderate thickness, 30 mils (0.76 mm). 3.2.3 mastic—a protective finish of relatively thick consis- tency capable of application to thermal insulation or other surfaces usually by spray or trowel, in thick coats greater than 30 mils (0.03 in.) (0.76 mm). 3.2.4 service properties—properties that govern perfor- mance of finishes after installation. 3.3 Specific Definitions—Terms specific to Sections 6 and 7 are defined as appropriate.
4. Significance and Use
4.1 Each of the properties listed should be considered in selecting materials for specific projects. A list of the selected properties with limiting values assigned will form a part of the product specification. 4.2 All of the properties are not required, and all of the tests outlined are not required. A condition to any specification must be an evaluation of the proposed use to determine which properties shall be required. 4.3 Membrane reinforcements are frequently specified and used with mastics and coatings. Service properties of such systems of finishes are often different from the unreinforced finishes; therefore, it is essential to test specimens of the reinforced system.
5. Classification of Mastics and Coatings
5.1 Vapor-Retarder Type—A finish intended for service on insulated units that are operated below ambient temperature at least part of the time. N OTE 1—Practice C755 provides additional guidance. 5.1.1 Outdoor service. 5.1.2 Indoor service. 5.2 Vapor-Permeable Type—Afinish intended for service on insulated units that are operated above ambient temperature. (See 7.6.2. Sometimes referred to as a “breather” finish.) 5.2.1 Outdoor service.
6. Application Properties
6.1 Consistency: 6.1.1 Definition—the resistance of a non-Newtonian mate- rial to deformation or flow. N OTE 2—Consistency is not a fundamental property but is made up of viscosity, plasticity, and other rheological phenomena (see Terminology D2507). In non-Newtonian behavior, usual for mastics and coatings for thermal insulation, the ratio ofshearing stress to the rate ofshearing strain varies with the shearing stress. 6.1.2 Significance and Use—Consistency determines whether a mastic or coating can be troweled, applied by gloved hand, brushed, or sprayed. It has a direct effect on application costs. 6.1.3 Technical Evaluation—Test Methods C461, D562, and D2196. 6.2 Coverage: 6.2.1 Definition—the measure of surface area in ft 2 /gal (m 2 /litre) (coatings) or gallons per 100 ft 2 (mastics) at which finish must be applied to obtain specified dry thickness and desired performance. 6.2.2 Significance and Use—The performance of finishes is related directly to the optimum dry thickness. Therefore, performance properties must be defined in terms of optimum dry thickness, and this value must be established for applica- tion purposes in terms ofcoverage. Coverage data are essential for estimating material quantities and costs. 6.2.3 Technical Evaluation—Test Methods C461. 6.3 Build: 6.3.1 Definition—the thickness to which a coating or mastic finish can be applied without sagging, running, sliding, or dripping. 6.3.2 Significance and Use—Finishes for thermal insulation must be capable ofapplication on vertical or overhead surfaces at specified coverage without subsequent reduction in thickness, caused by excessive flow or slump. Build also determines the number of coats required for optimum dry thickness. 6.3.3 Technical Evaluation—Test Methods C461. 6.4 Wet Flammability (during application): 6.4.1 Definition—the relative ease of ignition and conse- quent fire hazard of a finish during application, as indicated by its flash point, fire point, and fuel contribution.

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