1、Designation: F2055 10Standard 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.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 squareness of resilien
6、t 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 single apparatus and pr
7、ocedure.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 bedplate is elevated to
8、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 tozero all dial gages (see F
9、ig. 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 central 10% of the tile edge
10、 (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 0.001 in. (12.719.1 mm
11、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 contains 2 fixed indexstrip
12、s. 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 (1.57080 6 0.00005 rad.)
13、 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 dimensions of the manufactur
14、ed tile. The length andwidth dimensions shall be within 6 0.001 in. (0.02 mm) of thespecified dimensions of the resilient tile. The reference plateshall contain at least 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 ze
15、ro.5. Specimens5.1 The specimens shall consist of 5 full size tiles.1This test method is under the jurisdiction ofASTM Committee F06 on ResilientFloor Coverings and is the direct responsibility of F06.20 Test Methods - ProductsConstruction/Materials.Current edition approved Nov. 1, 2010. Published N
16、ovember 2010. Originallyapproved in 2000. Last previous edition approved in 2009 as F2055-09. DOI:10.1520/F2055-10.2For 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 t
17、he standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.6. Conditioning6.1 Condition the test specimens, reference plate, and appa-ratus a minimum of 24 h at 73.4 6 1.8F (23 6 1C) and 506
18、 5% relative humidity. Tests shall be conducted in this sameenvironment. Samples shall be conditioned on a flat surfacesuch as a table or floor surface to ensure they will contact thebedplate uniformly during measurement.7. Procedure7.1 Place the appropriate reference plate onto the bedplatesurface
19、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 negative number. In the case of mechan
20、ical 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 and after each use.7.2 Measuring Si
21、ze 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 with both index strips. Recordthe mea
22、surements 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 all samples have been measured, pl
23、ace 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 formatshown in Table 1. Measurements shall be r
24、ecorded to thenearest 0.001 in. (0.02 mm) for all gages. The four rotationsprovide two measurements of the length and width at the centerand both edges of each of the tile specimens. Report thedimensions and squareness for each specimen using the for-mulas in 8.2.8.2 Perform the following calculatio
25、ns 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 = (1A+3C)/2 Corner 1 = (D1)Length
26、 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 and squareness for each speci-men u
27、sing 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 types of flooring tilematerials for
28、deviations across their length, width, and diago-nal. Every “test result” represents an individual determination.All participating laboratories reported ten replicate test results(from one operator) for each type of flooring material. PracticeE691 was followed for the design and analysis of the data
29、.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 test3Details are given in ASTM Research Report RR:F06-1008, ava
30、ilable fromASTM International Headquarters.FIG. 1 Tile Measurement ApparatusA: Tile Target Dimension 6 0.001 in. (0.02 mm)B: 90 6 10 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.
31、0033 0.004 0.001 0.003 0.0024 0.003 0.002 0.005 0.004F2055 102results 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 bej
32、udged not equivalent if they differ by more than the “R” valuefor that 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 a
33、re listed in Tables 2-11.10.1.3 The terms (repeatabilty limit and reproducibilitylimit) 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 accepted
34、reference material suitable for determining the bias of this testmethod, 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 the
35、following:Material A: 12 in. by 12 in. VCTMaterial B: 12 in. by 12 in. 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
36、to choose the material closest in characteristicsto the test material.11. Keywords11.1 dial gage; resilient flooring; resilient tile; tileTABLE 2 Length Deviation Left (inches)MaterialAverageAxStandardDeviation ofthe LabAveragesS xRepeatabilityStandard DeviationSrReproducibilityStandard DeviationSRR
37、epeatability 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 0.0207 0.0044 0.0026 0.0052 0.0074 0.0147AT
38、he average of the laboratories calculated averages.F2055 103TABLE 3 Length Deviation Center (inches)MaterialAverageAxStandardDeviation ofthe LabAveragesS xRepeatabilityStandard DeviationSrReproducibilityStandard DeviationSRRepeatability LimitrReproducibilityLimitRA 0.0005 0.0035 0.0016 0.0038 0.0044
39、 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 calculated averages.TABLE 4 Length Deviation
40、Right (inches)MaterialAverageAxStandardDeviation ofthe LabAveragesS xRepeatabilityStandard DeviationSrReproducibilityStandard DeviationSRRepeatability LimitrReproducibilityLimitRA 0.0006 0.0026 0.0020 0.0033 0.0055 0.0093B 0.0041 0.0021 0.0017 0.0028 0.0048 0.0077C 0.2126 0.0029 0.0024 0.0039 0.0068
41、 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)MaterialAverageAxStandardDeviation ofthe LabAveragesS xRepeatabilityStanda
42、rd DeviationSrReproducibilityStandard 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 0.0040 0.0055 0.011E 0.0135 0.0044 0.0033 0.0057 0.0093 0.
43、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)MaterialAverageAxStandardDeviation ofthe LabAveragesS xRepeatabilityStandard DeviationSrReproducibilityStandard DeviationSRRepeatability LimitrReproducibilityLim
44、itRA 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 0.0028 0.0044 0.0078 0.0124AThe average of the laboratories calcul
45、ated averages.F2055 104TABLE 7 Width Deviation Right (inches)MaterialAverageAxStandardDeviation ofthe LabAveragesS xRepeatabilityStandard DeviationSrReproducibilityStandard DeviationSRRepeatability LimitrReproducibilityLimitRA 0.0017 0.0029 0.0022 0.0037 0.0060 0.0104B 0.0033 0.0020 0.0023 0.0032 0.
46、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.TABLE 8 D1 Squareness Deviation (inches)MaterialAverageAxStandar
47、dDeviation ofthe LabAveragesS xRepeatabilityStandard DeviationSrReproducibilityStandard 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
48、.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 averages.TABLE 9 D2 Squareness Deviation (inches)MaterialAverageAxStandardDeviation ofthe LabAveragesS xRepeatabilityStandard DeviationSrReproducibilityStanda
49、rd DeviationSRRepeatability LimitrReproducibilityLimitRA 0.0009 0.0050 0.0028 0.0058 0.0078 0.0162B 0.0039 0.0041 0.0025 0.0049 0.0070 0.0138C 0.0012 0.0028 0.0079 0.0088 0.0221 0.0246D 0.0005 0.0033 0.0039 0.0053 0.0109 0.0147E 0.0086 0.0060 0.0066 0.0092 0.0184 0.0258F 0.0015 0.0067 0.0031 0.0075 0.0086 0.0209AThe average of the laboratories calculated averages.TABLE 10 D3 Squareness Deviation (inches)MaterialAverageAxStandardDeviation ofthe LabAveragesS xRepeatabilityStandard DeviationSrReproducibilityStandard DeviationSRRepeat
