1、Designation: F2055 17Standard Test Method forSize and Squareness of Resilient Floor Tile by Dial GageMethod1This standard is issued under the fixed designation F2055; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last
2、 revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method covers the determination of bothdimensions (length and width) and squareness of resilient floortile. This
3、 test method is intended for use with square tilesranging from a nominal 9 in. (226 mm) to 40 in. (1016 mm) indimension.1.2 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information o
4、nlyand are not considered standard.1.3 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 health practices and determine the applica-bility of regulatory limit
5、ations prior to use.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization
6、TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2E177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test Method3. Significance and Use3.1 Both dimension and
7、 squareness of resilient floor tile areimportant considerations, because installed flooring may ex-hibit an objectionable appearance when either or both charac-teristics deviate from established tolerances. This test methodprovides a means of determining actual dimensions and square-ness by using a
8、single apparatus and procedure.4. Apparatus4.1 The apparatus shall consist of four dial gages and tworeference index strips mounted on a flat bedplate in a configu-ration that, by rotation of the sample, allows the measurementof all four sides of resilient tile samples (see Fig. 1). One edgeof the b
9、edplate is elevated to create a test surface which isoffset or tilted 15 6 1 degrees from horizontal. This offsetapplies minimal pressure to the test specimen against thelonger index strip to ensure repeatable measurement. A refer-ence plate representing target tile size and squareness is used tozer
10、o all dial gages (see Fig. 2).4.2 Dial GagesThe four dial gages are mounted in guideslots that are machined into the bedplate to allow for measure-ment of various tile sizes while remaining within 10% of thecorner of the tile edge (for the two corner gages and onesquareness gage) or within the centr
11、al 10% of the tile edge (forthe center gage only). Dial gages may report measurementsusing either electrical or mechanical means, but they shall begraduated to read 0.001 in. (0.02 mm) and have a stem travelgreater than 0.25 in. (6 mm). The contact foot of the dial-gagestem shall be flat 0.500.75 6
12、0.001 in. (12.719.1 mm 6 0.2mm) in diameter and exert a total force of not more than 3.0 60.1 ozf (0.83 6 0.003 N). Dial gages shall be securelypositioned so that when the reference plate is in place, thecontact foot is extended approximately 50% of its full travel.4.3 Index StripsThe apparatus cont
13、ains 2 fixed indexstrips. A horizontal index strip shall be mounted parallel to andjust inside the lower edge of the bedplate. It shall be 1.5 6 0.1in. (38 6 3 mm) greater in length and a minimum of twice thethickness of the largest tile to be tested. A second index stripshall be mounted 90 6 10 s (
14、1.57080 6 0.00005 rad.) to thehorizontal index strip. The lower end of this index strip shall be0.125 6 0.01 in. (3.1 6 0.25 mm) above the right end of thehorizontal index strip and is used to locate one corner of thesample tile.4.4 Reference PlateThe reference plate shall be made tothe target dimen
15、sions of the manufactured tile. The length and1This test method is under the jurisdiction ofASTM Committee F06 on ResilientFloor Coverings and is the direct responsibility of F06.20Test Methods - ProductsConstruction/Materials.Current edition approved May 1, 2017. Published May 2017. Originallyappro
16、ved in 2000. Last previous edition approved in 2010 as F2055-10. DOI:10.1520/F2055-17.2For 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
17、 page onthe ASTM website.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles fo
18、r theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.1width dimensions shall be within 6 0.001 in. (0.02 mm) of thespecified dimensions of the resilient tile. The reference plateshall contain at lea
19、st two sides which are perpendicular to 906 10 s (1.57080 6 0.00005 rad.) to one another and are usedto set the squareness gage to zero.5. Specimens5.1 The specimens shall consist of 5 full size tiles.6. Conditioning6.1 Condition the test specimens, reference plate, and appa-ratus a minimum of 24 h
20、at 73.4 6 1.8F (23 6 1C) and50 6 10 % relative humidity. Tests shall be conducted in thissame environment. Samples shall be conditioned on a flatsurface such as a table or floor surface to ensure they willcontact the bedplate uniformly during measurement.7. Procedure7.1 Place the appropriate referen
21、ce plate onto the bedplatesurface and slide it firmly against the two index strips. Set eachof the four dial indicators to zero. Remove the reference plate.All dial indicators will now reflect their fully extended mea-surements. In the case of digital dial indicators, the display willindicate a nega
22、tive number. In the case of mechanical dialindicators, the display will move counter-clockwise from zero.NOTE 1Dirt and foreign particles may collect along the upper face ofthe index strip and affect the zero setpoint. Use a small brush to maintainthe cleanliness of the index strip surfaces before a
23、nd after each use.7.2 Measuring Size and SquarenessIdentify one edge ofthe sample tile as “Edge #1” by attaching a label to the face ofthe tile near that edge. Place the tile into the apparatus andcarefully move it into position such that it will depress all fourdial gages and is in firm contact wit
24、h both index strips. Recordthe measurements on all four gages to the nearest 0.001 in.(0.02 mm).7.3 Remove the tile from the bedplate and rotate it 90 in theclockwise direction. Repeat the process described in 7.2 andrecord the four gage readings. Repeat for each of the tworemaining sides.7.4 After
25、all samples have been measured, place the refer-ence gage back on the bedplate to verify that no movement ofdial gages has occurred. A movement of greater than 0.001 in.(0.02 mm) shall be cause to repeat the measurement process.8. Calculations8.1 Tile SizeRecord all measurements in the format showni
26、n Table 1. Measurements shall be recorded to the nearest 0.001in. (0.02 mm) for all gages. The four rotations provide twomeasurements of the length and width at the center and bothedges of each of the tile specimens. Report the dimensions andsquareness for each specimen using the formulas in 8.2.8.2
27、 Perform the following calculations using Table 1 data todetermine length, width, and squareness deviations for thesample tile. The final report shall include tile size, test date, andlength, width, and squareness deviations.Length and Width Deviation Squareness DeviationLength Deviation, Left Side
28、= (1A+3C)/2 Corner 1 = (D1)Length Deviation, Center = (1B+3B)/2 Corner 2 = (D2)Length Deviation, Right Side = (1C+3A)/2 Corner 3 = (D3)Width Deviation, Left Side = (2A+4C)/2 Corner 4 = (D4)Width Deviation, Center = (2B+4B)/2Width Deviation, Right Side = (2C+4A)/29. Report9.1 Report the dimensions an
29、d squareness for each speci-men using the formulas in 8.2.10. Precision and Bias10.1 The precision of this test method is based on anintralaboratory study of F2055, Size and Squareness of Resil-ient Floor Tile by Dial Gage Method, conducted in 2007. Eachof seven laboratories tested six different typ
30、es of flooring tilematerials for deviations across their length, width, and diago-nal. Every “test result” represents an individual determination.All participating laboratories reported ten replicate test resultsFIG. 1 Tile Measurement ApparatusA: Tile Target Dimension 6 0.001 in. (0.02 mm)B: 90 6 1
31、0 s (1.57080 6 0.00005 rad.)FIG. 2 Reference PlateTABLE 1 Typical Measurement DataRotation No. Gage A Gage B Gage C Gage D1 0.002 0.003 0.002 0.0022 0.003 0.000 0.001 0.0033 0.004 0.001 0.003 0.0024 0.003 0.002 0.005 0.004F2055 172(from one operator) for each type of flooring material. PracticeE691
32、was followed for the design and analysis of the data.310.1.1 Repeatability Limit, (r)Two test results obtainedwithin one laboratory shall be judged not equivalent if theydiffer by more than the “r” value for that material; “r”istheinterval representing the critical difference between two testresults
33、 for the same material, obtained by the same operatorusing the same equipment on the same day in the samelaboratory.10.1.1.1 Repeatability limits are listed in Tables 2-11.10.1.2 Reproducibility Limit, (R)Two test results shall bejudged not equivalent if they differ by more than the “R” valuefor tha
34、t material; “R” is the interval representing the criticaldifference between two test results for the same material,obtained by different operators using different equipment indifferent laboratories.10.1.2.1 Reproducibility limits are listed in Tables 2-11.10.1.3 The terms (repeatabilty limit and rep
35、roducibilitylimit) are used as specified in Practice E177.10.1.4 Any judgment in accordance with 10.1.1 and 10.1.2would have an approximate 95 % probability of being correct.10.2 BiasAt the time of this study, there was no acceptedreference material suitable for determining the bias of this testmeth
36、od, therefore no statement on bias is being made.10.3 The precision statement was determined through sta-tistical examination of 1120 results, from seven laboratories,on six materials. These six tile materials were described as thefollowing:Material A: 12 in. by 12 in. VCTMaterial B: 12 in. by 12 in
37、. VCTMaterial C: 18 in. by 18 in. Rubber TileMaterial D: 18 in. by 18 in. Vinyl TileMaterial E: 24 in. by 24 in. Rubber TileMaterial F: 24 in. by 24 in. Vinyl Tile10.4 To judge the equivalency of two test results, it isrecommended to choose the material closest in characteristicsto the test material
38、.11. Keywords11.1 dial gage; resilient flooring; resilient tile; tile3Details are given in ASTM Research Report RR:F06-1008, available fromASTM International Headquarters.TABLE 2 Length Deviation Left (inches)MaterialAverageAxStandard De-viation of theLab AveragesSxRepeatability Stan-dard DeviationS
39、rReproducibility Stan-dard DeviationSRRepeatability LimitrReproducibilityLimitRA 0.0003 0.0045 0.0022 0.0050 0.0061 0.0141B 0.0037 0.0023 0.0013 0.0027 0.0038 0.0075C 0.2126 0.0033 0.0024 0.0041 0.0066 0.0115D 0.0137 0.0023 0.0023 0.0034 0.0064 0.0094E 0.0158 0.0051 0.0035 0.0063 0.0098 0.0177F 0.02
40、07 0.0044 0.0026 0.0052 0.0074 0.0147AThe average of the laboratories calculated averages.TABLE 3 Length Deviation Center (inches)MaterialAverageAxStandard De-viation of theLab AveragesSxRepeatability Stan-dard DeviationSrReproducibility Stan-dard DeviationSRRepeatability LimitrReproducibilityLimitR
41、A 0.0005 0.0035 0.0016 0.0038 0.0044 0.0107B 0.0038 0.0018 0.0012 0.0022 0.0034 0.0062C 0.2126 0.0023 0.0013 0.0027 0.0037 0.0076D 0.0141 0.0027 0.0011 0.0030 0.0031 0.0083E 0.0146 0.0040 0.0023 0.0047 0.0065 0.0131F 0.0207 0.0034 0.0024 0.0042 0.0066 0.0118AThe average of the laboratories calculate
42、d averages.F2055 173TABLE 4 Length Deviation Right (inches)MaterialAverageAxStandard De-viation of theLab AveragesSxRepeatability Stan-dard DeviationSrReproducibility Stan-dard DeviationSRRepeatability LimitrReproducibilityLimitRA 0.0006 0.0026 0.0020 0.0033 0.0055 0.0093B 0.0041 0.0021 0.0017 0.002
43、8 0.0048 0.0077C 0.2126 0.0029 0.0024 0.0039 0.0068 0.0108D 0.0151 0.0020 0.0019 0.0028 0.0055 0.0079E 0.0174 0.0054 0.0043 0.0070 0.0119 0.0196F 0.0212 0.0051 0.0031 0.0061 0.0087 0.0171AThe average of the laboratories calculated averages.TABLE 5 Width Deviation Left (inches)MaterialAverageAxStanda
44、rd De-viation of theLab AveragesSxRepeatability Stan-dard DeviationSrReproducibility Stan-dard DeviationSRRepeatability LimitrReproducibilityLimitRA 0.0016 0.0033 0.0015 0.0037 0.0043 0.0102B 0.0030 0.0024 0.0021 0.0033 0.0059 0.0092C 0.2124 0.0033 0.0023 0.0041 0.0065 0.0115D 0.0148 0.0034 0.0020 0
45、.0040 0.0055 0.011E 0.0135 0.0044 0.0033 0.0057 0.0093 0.0158F 0.0214 0.0046 0.0032 0.0057 0.0088 0.0159AThe average of the laboratories calculated averages.TABLE 6 Width Deviation Center (inches)MaterialAverageAxStandard De-viation of theLab AveragesSxRepeatability Stan-dard DeviationSrReproducibil
46、ity Stan-dard DeviationSRRepeatability LimitrReproducibilityLimitRA 0.0021 0.0034 0.0014 0.0037 0.0039 0.0105B 0.0025 0.0023 0.0022 0.0033 0.0061 0.0092C 0.2127 0.0022 0.0023 0.0032 0.0063 0.0090D 0.0154 0.0026 0.0013 0.0030 0.0038 0.0083E 0.0129 0.0043 0.0034 0.0056 0.0096 0.0158F 0.0205 0.0033 0.0
47、028 0.0044 0.0078 0.0124AThe average of the laboratories calculated averages.TABLE 7 Width Deviation Right (inches)MaterialAverageAxStandard De-viation of theLab AveragesSxRepeatability Stan-dard DeviationSrReproducibility Stan-dard DeviationSRRepeatability LimitrReproducibilityLimitRA 0.0017 0.0029
48、 0.0022 0.0037 0.0060 0.0104B 0.0033 0.0020 0.0023 0.0032 0.0066 0.0089C 0.2107 0.0024 0.0026 0.0037 0.0072 0.0102D 0.0156 0.0032 0.0021 0.0039 0.0058 0.0109E 0.0136 0.0053 0.0032 0.0063 0.0089 0.0176F 0.0208 0.0046 0.0035 0.0059 0.0098 0.0164AThe average of the laboratories calculated averages.F205
49、5 174TABLE 8 D1 Squareness Deviation (inches)MaterialAverageAxStandard De-viation of theLab AveragesSxRepeatability Stan-dard DeviationSrReproducibility Stan-dard DeviationSRRepeatability LimitrReproducibilityLimitRA 0.0007 0.0028 0.0033 0.0045 0.0093 0.0127B 0.0001 0.0037 0.0026 0.0046 0.0072 0.0128C 0.0030 0.0036 0.0057 0.0070 0.0160 0.0197D 0.0018 0.0013 0.0029 0.0034 0.0082 0.0094E 0.0027 0.0055 0.0052 0.0078 0.0145 0.0218F 0.0029 0.0059 0.0035 0.0070 0.0099 0.0196AThe average of the laboratories calculated averag
