1、Designation: D1970/D1970M 17D1970/D1970M 17aStandard Specification forSelf-Adhering Polymer Modified Bituminous Sheet MaterialsUsed as Steep Roofing Underlayment for Ice DamProtection1This standard is issued under the fixed designation D1970/D1970M; the number immediately following the designation i
2、ndicates theyear of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of lastreapproval. A superscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers polymer modif
3、ied bituminous sheet materials intended for use as underlayment on roof eaves, orvalleys, or both, to prevent leakage of shingle, tile, or metal roofs from water back-up due to ice dams.1.2 These underlayment sheets have a sticky adhesive layer which is exposed by removal of a protective sheet. The
4、top surfaceis suitable to work on during the application of the exposed roofing.1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in eachsystem may not be exact equivalents; therefore, each system shall be used independently of
5、the other. Combining values from thetwo systems may result in non-conformance with the standard.1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety safety, heal
6、th, and healthenvironmental practices and determine theapplicability of regulatory limitations prior to use.1.5 This international standard was developed in accordance with internationally recognized principles on standardizationestablished in the Decision on Principles for the Development of Intern
7、ational Standards, Guides and Recommendations issuedby the World Trade Organization Technical Barriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2D228/D228M Test Methods for Sampling, Testing, and Analysis of Asphalt Roll Roofing, Cap Sheets, and Shingles Used inRoofing and
8、WaterproofingD903 Test Method for Peel or Stripping Strength of Adhesive BondsD1079 Terminology Relating to Roofing and WaterproofingD1204 Test Method for Linear Dimensional Changes of Nonrigid Thermoplastic Sheeting or Film at Elevated TemperatureD2523 Practice for Testing Load-Strain Properties of
9、 Roofing MembranesD4073 Test Method for Tensile-Tear Strength of Bituminous Roofing MembranesD5147/D5147M Test Methods for Sampling and Testing Modified Bituminous Sheet MaterialD7349/D7349M Test Method for Determining the Capability of Roofing and Waterproofing Materials to Seal around FastenersE96
10、/E96M Test Methods for Water Vapor Transmission of Materials3. Terminology3.1 DefinitionsFor definitions of terms used in this specification, refer to Terminology D1079.3.2 Definitions of Terms Specific to This Standard:3.2.1 lotfor the purpose of sampling, a lot shall consist of all material manufa
11、ctured in one production run (not to exceed 24h) using the same source of raw materials.1 This specification is under the jurisdiction of ASTM Committee D08 on Roofing and Waterproofing and is the direct responsibility of Subcommittee D08.02 on SteepRoofing Products and Assemblies.Current edition ap
12、proved May 1, 2017Nov. 1, 2017. Published May 2017November 2017. Originally approved in 1990. Last previous edition approved in 20162017 asD1970/D1970M 16.D1970/D1970M 17. DOI: 10.1520/D1970_D1970M-17.10.1520/D1970_D1970M-17A.2 For referencedASTM standards, visit theASTM website, www.astm.org, or co
13、ntactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have b
14、een made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official docume
15、nt.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States14. Workmanship, Finish, and Appearance4.1 The underlayment sheet shall be supplied in roll form.4.2 The underlayment sheet shall be substantially uniform in thickness and appearance.
16、It shall be free of visible defects suchas holes, ragged or untrue edges, breaks, cracks, tears, protuberances, and indentations, except for those perforations orprotuberances which are intentional.4.3 The surface of the underlayment sheet shall be designed to provide traction and slip resistance to
17、 the applicator.NOTE 1The intent of 4.3 is to recognize that surface slipperiness is important when working on a roof and, while no test method is specified in thisstandard, several methods for assessing the relative slipperiness of surfaces are available. It is the further intent of this paragraph
18、to ensure that, whatevermethod is used, the friction coefficient or resistance to slipping of the surface of these products should be at least as great as asphalt-saturated felt shingleunderlayment tested under the same conditions of temperature and wetness as agreed between purchaser and seller.4.4
19、 Sheet sections shall be suitable for joining by the manufacturers recommended procedure. The entire lower surface of theunderlayment sheet shall be capable of being fully adhered to the roof deck.5. Physical Requirements5.1 The underlayment sheet shall conform to the physical requirements prescribe
20、d in Table 1.5.2 The underlayment sheet shall not crack nor be so sticky as to cause tearing or other damage upon being unrolled at materialtemperatures between 4.4 and 60C 40 and 140F.6. Sampling6.1 From each lot of underlayment sheet, select sample rolls in accordance with Test Methods D228/D228M.
21、6.2 The rolls so selected shall constitute the representative sample used for all subsequent observations and tests pertaining tothe lot of material being examined.7. Test Methods7.1 ConditioningUnless otherwise specified, condition test specimens for at least 4 h at 23 6 2C 73.4 6 3.6F and 50 65 %
22、relative humidity prior to testing.7.2 Thickness:7.2.1 Measure the thickness of the roofing underlayment in accordance with Test Methods D5147/D5147M.7.2.2 Report the number of measurements, the average and standard deviation across the sheet.7.3 Maximum Load and Elongation at BreakThis test method
23、covers the determination of the maximum load and elongationat break of the underlayment sheets, as set forth in Practice D2523 except as noted below.7.3.1 Specimens:7.3.1.1 Prepare five specimens from each sample roll in both the longitudinal and transverse directions. Specimens shall be 25mm 1 in.
24、65 % wide by a minimum of 150 mm 6 in. 65 % long. For materials with high elongation the length of the samplemay be reduced to 100 mm 4 in. 65 % if necessary to avoid limitations imposed by dimensions of the test machine.7.3.2 Procedure:7.3.2.1 Condition each specimen at least 2 h at 23 6 2C 73.4 6
25、3.6F.TABLE 1 Physical Requirements of Self-Adhering PolymerModified Bituminous Sheet Materials Used as Steep RoofingUnderlayment for Ice Dam ProtectionProperty SI Inch-PoundThickness, min 1.0 mm 40 milsMaximum load, minLongitudinal 4.4 kN/m 25 lbf/in.Transverse 4.4 kN/m 25 lbf/in.Elongation at break
26、, min of modifiedbitumen portion10 %Adhesion to plywood, min at 40F 0.92 kgf/30.5 cm 2.0 lbf/ft widthAdhesion to plywood, min at 75F 5.44 kgf/30.5 cm 12.0 lbf/ft widthThermal stability, max 3 mm 0.1 in.Flexibility at 29C 20F passTear resistanceLongitudinal, min 89 N 20 lbfTransverse, min 89 N 20 lbf
27、Moisture vapor permeance, max 5.7 ng/Pa.S.M.2 0.1 U.S. PermsSealability around nail passWaterproof integrity of lap seam passD1970/D1970M 17a27.3.2.2 Use a constant rate of elongation (CRE) tension testing machine, preferably with automatic load and strain recordingequipment and clamps that permit a
28、 uniform clamping pressure on the specimen without slipping.The initial clamp separation shallbe a minimum of 75 mm 3 in. 65 % for sheets having an ultimate elongation of 75 % or less at 23.9C 75F and 50 mm 2in. 65 % for sheets having an ultimate elongation greater than 75 % at 23.9C 75F.7.3.2.3 Mai
29、ntain a rate of separation of 50 mm 2 in. 63 % per min.7.3.2.4 Record the percent elongation of each specimen at the visual break of the modified bitumen portion using anextensiometer, or mark the extension at visual break of the modified bitumen portion from the chart of the stress versus time(know
30、ing the speed of the chart drive and the jaw separation rate).7.3.2.5 Record the maximum load attained by each specimen.7.3.3 Calculation:7.3.3.1 Determine the percent elongation at break of the modified bitumen portion obtained from the extensiometer inaccordance with the manufacturers instructions
31、, or read directly. Calculate the percent elongation from the chart as follows:%Elongation5ab 3100% (1)where:a = extension at modified bitumen break (extension at break on chart jaw separation rate divided by chart speed), andb = initial jaw separation.7.3.3.2 Determine the average percent elongatio
32、n at break of the modified bitumen portion in each direction.7.3.3.3 Calculate the average maximum load in each direction.7.3.4 ReportFor each set of five specimens in each direction report the individual measurements, the average and standarddeviation for the size of specimen (initial length betwee
33、n jaws), maximum load in kN/m lbf/in., percent elongation at modifiedbitumen break, and method of determining elongation.7.4 Adhesion to PlywoodThis test method covers the determination of the adhesive properties of the underlayment sheets toplywood, as set forth in Test Method D903 except as noted
34、below.7.4.1 Specimen Preparation:7.4.1.1 The test specimen shall consist of one piece of underlayment sheet, 75 6 2 by 200 6 2 mm 3 6 0.125 by 8 6 0.125in., bonded for 15 in.2 (75 125 mm) 3 by 5 in. to one piece of 6 mm 14 in. minimum thick plywood, APA Grade, Exposure1, 75 by 150 mm 3 by 6 in. The
35、plywood must not be reused for testing.7.4.1.2 Roll test specimen three times back and forth with a roller which has a mass of 11.8 kg 26 lb60.5 %, diameter of 125mm 5 in. 65 %, and width of 125 mm 5 in. 65 % (2 to 3 s per cycle).7.4.1.3 At least five specimens shall be tested for each test temperat
36、ure.7.4.1.4 It is recommended that specimens be assembled individually. Cutting specimens to size after assembly may influencethe test results.7.4.2 ConditioningThe test shall be performed at 23 6 2C 73.4 6 3.6F and 4 6 2C 39.2 6 3.6F. Materials used toconstruct test specimens and the roller, must b
37、e conditioned at the test temperature for at least 4 h prior to assembly. Similarly,test specimens must be conditioned at the test temperatures for at least 1 h prior to testing.NOTE 2Adhesion to other potential wood deck materials may be determined by this test method, but it has been observed that
38、 substrates such asAPAapproved nonveneer sheets typically give greater adhesion values than the minimum specified in this standard for plywood.7.4.3 Apparatus:7.4.3.1 Perform the test in a constant rate of extension type tester.7.4.3.2 The rate of travel of the power-actuated grip shall be 50 mm 2 i
39、n./min 63 %. This rate which provides a laminateseparation rate of 25 mm 1 in./min 63 % shall be uniform throughout the test.7.4.4 Procedure:7.4.4.1 Conduct the test after the test specimens have been conditioned at the test temperature (in the environmental chamber)for 15 min.7.4.4.2 Separate the f
40、ree end of the underlayment sheet from the plywood for a distance of about 50 mm 2 in. leaving about75 mm 3 in. of bonded length. Place the specimen in the testing machine by clamping the free end of the plywood in one grip,turning back the free end of the sheet and clamping it in the other grip. Ma
41、intain the specimen in the approximate plane of theclamps during the test. Peel at least three quarters of the bonded area, even though a peel or stripping value may be indicated beforethis point.7.4.5 CalculationDetermine the peel strength on the chart as the average load line that will visually ac
42、commodate therecorded curve. Record the load so indicated, corrected for tare.7.4.6 ReportingFor each series of tests, report the number of measurements, the average, and the standard deviation of all thetest values in kg/30.5 cm width lb/ft of width.7.5 Thermal StabilityThis test method determines
43、the thermal stability of the underlayment sheets as set forth in Test MethodD1204, except as noted below.D1970/D1970M 17a37.5.1 Specimens:7.5.1.1 The test specimen shall consist of one piece of underlayment sheet, 100 6 2 by 100 6 2 mm 4 6 0.125 by 4 6 0.125in., centered and bonded (as described in
44、7.4.1) to one piece of 6 mm 14-in. minimum thick plywood, (APA Grade, Exposure1) 150 6 2 by 200 6 2 mm 6 6 0.125 by 8 6 0.125 in.7.5.1.2 At least five specimens shall be tested for each sample roll.7.5.2 Procedure:7.5.2.1 Set specimens at a 45 angle in a hot air circulating oven maintained at 70 6 2
45、C 158 6 4F for 14 days.7.5.2.2 At the end of the oven-exposure period, allow specimens to equilibrate to 23.9 6 1.1C 75 6 2F and 50 6 5 %relative humidity for at least 4 h.7.5.2.3 From the lower edge of the sheet measure to the nearest 2.5 mm 0.1 in. the furthest point of modified bitumen flow.Estim
46、ate the average flow across the entire lower edge of the sample.7.5.3 ReportReport the individual specimen values, the average and the standard deviation.7.6 Flexibility at 29C 20FThis test method determines the low temperature flexibility of the underlayment sheets. Forthe sheet material to be give
47、n a pass rating in this test, the material must demonstrate either no visible signs of cracking afterbending at the test temperature through an angle of 180 6 5 around a 25 mm 1 in. 65 % diameter mandrel in 2 6 1 s, or minorsurface cracking is observedvisible in one or more specimens that have been
48、bent over the mandrel and a head of waterconfirmation, performed on a sheet of material that has been subjected to this bending, yields a passing result.7.6.1 SpecimensPrepare five specimens from each roll in both the longitudinal and transverse direction. Specimens shall be25 mm 1 in. 65 % wide by
49、150 mm 6 in. 65 % long. Remove the release liner from each specimen.7.6.2 ConditioningCondition specimens and mandrel in a refrigeration unit for a minimum of 2 h at 2962C 2063.6F.7.6.3 Procedure:7.6.3.1 After the specimens have been conditioned, conduct the test at 2962C 2063.6F. Complete the entire procedureinside the refrigeration unit. Position the center of the specimen firmly on the mandrel with the weathering side up. Bend theproj
