ASTM F1914-2007 Standard Test Methods for Short-Term Indentation and Residual Indentation of Resilient Floor Covering《弹性地板覆盖物的短期压痕和残留压痕的标准试验方法》.pdf
《ASTM F1914-2007 Standard Test Methods for Short-Term Indentation and Residual Indentation of Resilient Floor Covering《弹性地板覆盖物的短期压痕和残留压痕的标准试验方法》.pdf》由会员分享,可在线阅读,更多相关《ASTM F1914-2007 Standard Test Methods for Short-Term Indentation and Residual Indentation of Resilient Floor Covering《弹性地板覆盖物的短期压痕和残留压痕的标准试验方法》.pdf(5页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: F 1914 07Standard Test Methods forShort-Term Indentation and Residual Indentation ofResilient Floor Covering1This standard is issued under the fixed designation F 1914; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, t
2、he year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method covers procedures to determine short-term indentation and residual indentation of resilie
3、nt flooring,when subjected to concentrated loads.1.2 The test methods appear in the following order:SectionIndentation by McBurney2Test 4 to 10Indentation and Residual Indentation 11 to 151.3 There are two procedures with their respective appara-tus. The first (McBurney Test) is described in Section
4、s 4 to 10and is restricted to a spherical foot. It is only used for initialindentation measurements of VCT. The second is described inSections 11 to 15 and has interchangeable feet with variablegeometry. It is used to measure initial and residual indentation.1.4 The values stated in inch-pound units
5、 are to be regardedas the standard. The values given in parentheses are providedfor information only.1.5 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and hea
6、lth practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:3E 691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test MethodE 2251 Specification for Liquid-in-Glass ASTM Thermom-eters with Low-Hazar
7、d Precision LiquidsF 141 Terminology Relating to Resilient Floor CoveringsF 1066 Specification for Vinyl Composition Floor TileF 1303 Specification for Sheet Vinyl Floor Covering withBackingF 1700 Specification for Solid Vinyl Floor TileF 1913 Specification for Vinyl Sheet Floor Covering With-out Ba
8、cking3. Terminology3.1 DefinitionsFor definitions of terms used in this testmethod, refer to Terminology F 141.INITIAL INDENTATION MEASUREMENTS OF VCT(MCBURNEY TEST)24. Significance and Use4.1 This test method measures short-term indentation ofresilient flooring and is useful as a predictor of perfo
9、rmance inactual installations over time.4.2 The slope, m, of a log-log plot indentation (I) versustime (T), is related to the indentation of tile in service. The115F (46C) indentation is a measure of the tendency of thetile to indent at temperatures above 77F (25C).5. Apparatus5.1 Apparatus2The inde
10、ntation tester is a spherical footdevice consisting essentially of a rigidly mounted indentoracting under an initial load of 2.00 6 0.02 lbf (8.90 6 0.09 N)and a total deadweight load of 30.00 lbf 6 0.25 lbf (133.45 61.11 N) with a suitable dial indicator, calibrated in 0.0005 in.(0.01 mm) increment
11、s. The spherical foot shall be 0.250 60.0005 in. (6.35 6 0.01 mm) in diameter. A suitable apparatusis shown in Fig. 1.5.2 Flat Glass Plate, of 0.25 in. (6.35 mm) minimumthickness for supporting the specimen and tester during test.5.3 Timing Device that will indicate the time in seconds.5.4 Thermomet
12、er, calibrated as in Specification E 2251.5.5 Circular Plexiglas Template, 3.50 in. (88.9 mm) indiameter, 0.25 in. (6.35 mm) thick and having a 0.3125 in.(7.94 mm) diameter hole drilled in the center and a 0.75 in.(19.05 mm) diameter concentric circle etched on the face.1This test method is under th
13、e jurisdiction ofASTM Committee F06 on ResilientFloor Coverings and is the direct responsibility of Subcommittee F06.30 on TestMethods - Performance.Current edition approved Oct. 1, 2007. Published October 2007. Originallyapproved in 1998. Last previous edition approved in 2006 as F 191406.2The sole
14、 source of supply of the McBurney Indentation Tester known to thecommittee at this time is Frazier Precision Co, Gaithersburg, MD. If you are awareof alternative suppliers, please provide this information to ASTM InternationalHeadquarters. Your comments will receive careful consideration at a meetin
15、g of theresponsible technical committee1, which you may attend.3For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM websit
16、e.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.5.6 Water Baths, or air atmosphere maintained at 77 60.9F (25 6 0.5C) or 115 6 1F (46 6 0.5C).6. Test Specimens6.1 The test specimen shall be a full tile, usually 12 by 12 in.(approxi
17、mately 305 by 305 mm) or 9 by 9 in. (approximately230 by 230 mm). Larger tiles shall be cut to one of the abovesizes.7. Conditioning7.1 For testing in air, condition the specimen(s) for1hatthetest temperature.7.2 For testing in water, condition the specimen(s) at the testtemperature for 15 min minim
18、um and 30 min maximum (seeTable 1).7.3 Condition the indentation tester and glass plate in thesame medium and for at least the same time period as thespecimen(s).8. Procedures8.1 Nonembossed Surfaces:8.1.1 Place the specimen on the glass plate with the wearingsurface up.8.1.2 Place the indentor on t
19、he specimen. Be sure theindentor tip is retracted into the base when the instrument isplaced on the specimen and when being moved to another testlocation.8.1.3 Apply the initial 2-lbf (8.9-N) load (shaft assembly) tothe specimen surface.8.1.3.1 Position the 28-lbf (124.5-N) load on the specimenby ho
20、lding down with the thumb the 2-lbf (8.9-N) shaft crossbar to proper load.8.1.3.2 Gently lower the load to force the shaft cross barupward until there is no clearance between the shaft and theupper wear plate. This will ensure proper 2-lbf (8.9-N) loadingand positioning of the 28-lbf (124.5-N) load.
21、8.1.4 Set the dial gage at zero.8.1.5 Release the 28-lbf (124.5-N) load and start the timingdevice. (Steps 8.1.3-8.1.5 should not exceed a total of 5 s.)Load release should be smooth and as mechanical as possible.Turn the collar at least one-half turn beyond release to allowsufficient travel for ind
22、entation. Do not hold the collar handleafter the load is released as this may tilt the instrument fromvertical.8.1.6 Record the depth of indentation at 1 min 6 1 s and 10min 6 1 s to the nearest 0.0001 in. (0.0025 mm) for 77F(25C) testing and at 30 6 1 s for 114.8F (46C) testing.8.1.7 Perform three
23、of the required tests at randomly se-lected locations on the specimens. Record the three individualreadings and the average for each time period.8.2 Embossed Surfaces:8.2.1 Prior to conditioning use the template described in 5.5to locate areas on the specimen where a flat surface lies withinthe 0.75
24、 in. (19.05 mm) diameter circle etched in the template.Mark the area for placement of the indentor by tracing aroundthe template with a pencil. Follow the procedure detailed in8.1-8.1.7 after placing the indentor with its base inside thecircle.FIG. 1 Apparatus for Measuring Indentation: McBurneyF191
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