1、Designation: D1970/D1970M 16D1970/D1970M 17Standard 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 in
2、dicates 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 modifi
3、ed 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 t
4、op 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 t
5、he 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 and health pr
6、actices and determine the applicability of regulatorylimitations 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 International Standards, Guides and
7、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 WaterproofingD903 Test Method
8、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 Roofing MembranesD4073 Test M
9、ethod 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/E96M Test Methods for Water V
10、apor 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 manufactured in one production run (
11、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 approved Nov. 1, 2016May 1, 2017
12、. Published November 2016May 2017. Originally approved in 1990. Last previous edition approved in 20152016 asD1970/D1970M 15a.D1970/D1970M 16. DOI: 10.1520/D1970_D1970M-16.10.1520/D1970_D1970M-17.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at
13、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 been made to the previous versi
14、on. 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 document.Copyright ASTM Internationa
15、l, 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. It shall be free of visible de
16、fects 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 the applicator.NOTE 1The inte
17、nt 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 to ensure that, whatevermethod
18、 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 Sheet sections shall be suita
19、ble 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 prescribed in Table 1.5.2 The underlaym
20、ent 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.6.2 The rolls so selected shal
21、l 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 % relative humidity prior to tes
22、ting.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 covers the determination of th
23、e 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. 65 % wide by a minimum of 150
24、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 3.6F.TABLE 1 Physical Requirem
25、ents 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, min of modifiedbitumen porti
26、on10 %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 lbfMoisture vapor permeance, max
27、5.7 ng/Pa.S.M.2 0.1 U.S. PermsSealability around nail passWaterproof integrity of lap seam passD1970/D1970M 1727.3.2.2 Use a constant rate of elongation (CRE) tension testing machine, preferably with automatic load and strain recordingequipment and clamps that permit a uniform clamping pressure on t
28、he 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 Maintain a rate of separation of 5
29、0 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(knowing the speed of the chart driv
30、e 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, or read directly. Calculate t
31、he 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 elongation at break of the modified bitu
32、men 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 between jaws), maximum load in kN/m l
33、bf/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 below.7.4.1 Specimen Preparatio
34、n: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 plywood must not be reused for
35、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 temperature.7.4.1.4 It is recommended t
36、hat 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 be conditioned at the test tempe
37、rature 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 substrates such asAPAapproved
38、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 in./min 63 %. This rate which pr
39、ovides 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 free end of the underlayment she
40、et 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. Maintain the specimen in the appr
41、oximate 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 accommodate therecorded curve. Re
42、cord 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 the thermal stability of the un
43、derlayment sheets as set forth in Test MethodD1204, except as noted below.D1970/D1970M 1737.5.1 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 7.4.1) to one piece of 6 mm 14-i
44、n. 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 2C 158 6 4F for 14 days.7.5.2.2 A
45、t 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.Estimate the average flow across the
46、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 given a pass rating in this test, th
47、e 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 observed in one or more specimens that have been bent over the mandrel and a head of wat
48、er confirmation,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 150 mm 6 in. 65 % long. Remove the rele
49、ase 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 theprojecting ends without exerting any stress
