Designation:D2452-15 INTERNATIONAL Standard Test Method for Extrudability of Oil- and Resin-Base Caulking Compounds This standard is issued under the fixed designation D2452; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon (e) indicates an editorial change since the last revision or reapproval. 1. Scope 5.2 Air Supply and Pressure Gage, accurate to 6.9 kPa (1 1.1 This test method describes the laboratory procedure for psi). determining therateof extrusion of oil-and resin-base caulk- 5.3 Clamps and Stand to hold rheometer. ing compounds. 5.4 Balance, accurate to 0.01 g. 1.2 The values stated in metric (SI) units are to be regarded 5.5 Stopwatch. as the standard. The values given in parentheses are provided 5.6 Spatula (Steel). for information only. 5.7 Weight-per-gallon Cup, capacity 83.2 cm3. 1.3 The subcommittee with jurisdiction is not aware of any similar ISO standard. 6. Reagent 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the 6.1 Solvent, such as methyl ethyl ketone. responsibility of the user of this standard to establish appro- 7. Sampling priate safety and health practices and determine the applica- bility of regulatory limitations prior to use. 7.1 The compound to be tested shall be taken from a previously unopened container and thoroughly mixed before 2. Referenced Documents using. 2.1 ASTM Standards:2 C717 Terminology of Building Seals and Sealants 8. Conditioning D1475 Test Method For Density of Liquid Coatings, Inks, 8.1 After thoroughly cleaning the press-flow rheometer with and Related Products solvent, condition the compound and the rheometer in the 3. Terminology laboratory for at least 5 h at standard conditions. 3.1 DefinitionsDefinitions of the following terms are 9. Procedure found in Terminology C717: caulking compound, compound, 9.1 Remove the orifice holder from the rheometer cylinder sealant, standard conditions. and hold the open end up, making sure that the follower plate 4. Significance and Use remains inside. 4.1 The rate of extrusion determined by this test may be 9.2 Fill the cylinder with compound, avoiding air pockets. correlated with the rate of gunning of the compound. Strike off the filled cylinder with a spatula and replace the bottom orifice cap. Connect the tube to an air supply and fix it 5. Apparatus to a support stand above the balance. 5.1 Press-Flow Extrusion Rheometer constructed in accor- 9.3 Adjust the air pressure to 207 kPa (30 psi) and open the dance with Fig. 1. air valve. If the pressure drops, readjust to 207 kPa while extrusion is in progress. Close the air valve and discard this extruded compound. The apparatus is now ready for testing. This test method is under the jurisdiction of ASTM Committee C24 on Building Seals and Sealants and is the direct responsibility of Subcommittee C24.20 on 9.4 Open the air valve and start the stopwatch simultane- General Test Methods ously. After extruding approximately 50 g of compound, close Current edition approved June 1, 2015. Published July 2015. Originally approved the air valve and stop the stopwatch simultaneously. Weigh to in 1966. Last previous edition approved in 2009 as D2452-03(2009). DOI: 10.1520/D2452-15. the nearest 0.01 g the amount of compound extruded. For referenced ASTM standards,visit theASTM website, www.astm.org, 9.5 Calculate the seconds per gram by dividing the number contact ASTM Customer Service at [email protected]. For Annual Book of ASTM Standards volume information, refer to the standard's Document Summary page on of seconds elapsed by the number of grams extruded, and the ASTM website. designate this as value S. Copyright @ ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States 1 02452-15 THREADS, 2 FLOW RHEOMETE