1、Designation: D1970/D1970M 13aD1970/D1970M 14Standard 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 and health p
6、ractices and determine the applicability of regulatorylimitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D228 Test Methods for Sampling, Testing, andAnalysis ofAsphalt Roll Roofing, Cap Sheets, and Shingles Used in Roofing andWaterproofingD903 Test Method for Peel or Stripping Stren
7、gth 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 Method for Tensile-Tear Stre
8、ngth of Bituminous Roofing MembranesD5147 Test Methods for Sampling and Testing Modified Bituminous Sheet MaterialD7349 Test Method for Determining the Capability of Roofing and Waterproofing Materials to Seal around FastenersE96/E96M Test Methods for Water Vapor Transmission of Materials3. Terminol
9、ogy3.1 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 (not to exceed 24h) using the same source
10、of raw materials.4. Workmanship, Finish, and Appearance4.1 The underlayment sheet shall be supplied in roll form.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 Asse
11、mblies.Current edition approved Dec. 15, 2013July 1, 2014. Published December 2013August 2014. Originally approved in 1990. Last previous edition approved in 2013 asD1970/D1970M 13.D1970/D1970M 13a. DOI: 10.1520/D1970_D1970M-13A.10.1520/D1970_D1970M-14.2 For referencedASTM standards, visit theASTM w
12、ebsite, www.astm.org, or contactASTM 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 indica
13、tion of what changes have been 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 con
14、sidered the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States14.2 The underlayment sheet shall be substantially uniform in thickness and appearance. It shall be free of visible defects suchas holes, ragged or untrue ed
15、ges, 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 intent of 4.3 is to recognize that surface
16、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 is used, the friction coefficient or r
17、esistance 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 suitable for joining by the manufacturers re
18、commended 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 underlayment sheet shall not crack nor be so sti
19、cky 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 D228.6.2 The rolls so selected shall constitute the representative sample used f
20、or 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 testing.7.2 Thickness:7.2.1 Measure the thicknes
21、s of the shingle underlayment in accordance with Test Methods D5147.7.2.2 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 the maximum load and elongationat break of the underla
22、yment 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 mm 6 in. 65 % long. For materials with high elongati
23、on 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 Requirements of Self-Adhering PolymerModified Bituminous She
24、et 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 portion10 %Adhesion to plywood, min at 40F 0.92 kgf/30.5
25、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 temperature 29C 20FTear resistanceLongitudinal, min 89 N 20 lbfTransverse, min 89 N 20 lbfMoisture vapor permeance, max 5.7 ng/Pa.S.M.2 0.1 U.S. PermsSealability around
26、 nail passWaterproof integrity after low temperatureflexibilitypassWaterproof integrity of lap seam passD1970/D1970M 1427.3.2.2 Use a constant rate of elongation (CRE) tension testing machine, preferably with automatic load and strain recordingequipment and clamps that permit a uniform clamping pres
27、sure 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 Maintain a rate of separa
28、tion 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(knowing the speed of the c
29、hart 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, or read directly. Ca
30、lculate 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 elongation at break of the modi
31、fied 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 between jaws), maximum load
32、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 below.7.4.1 Specimen P
33、reparation: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 re
34、used 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 temperature.7.4.1.4 It is reco
35、mmended 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 be conditioned at the t
36、est 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 substrates such asAPA
37、approved 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
38、 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 free end of the underla
39、yment 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. Maintain the specimen in
40、 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 accommodate therecorded
41、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 the thermal stability
42、of the underlayment sheets as set forth in Test MethodD1204, except as noted below.D1970/D1970M 1437.5.1 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
43、6 mm 14-in. -in. minimum thick plywood, (APAGrade, 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 d
44、ays.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.Estimate the average flo
45、w across the entire lower edge of the sample.7.5.3 ReportReport the individual specimen values, the average and the standard deviation.7.6 Low Temperature FlexibilityFlexibility TemperatureThis test method determines the low temperature flexibility of theunderlayment sheets. For the sheet material t
46、o be given a pass rating in this test, the specimen must demonstrate either no visiblesigns of cracking in the sheet after bending 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 minor surface cracking is observed in the sheet and the head
47、 of water test, performed on a sheetof material that has been subjected to this bending.bending, yields a passing result.7.6.1 SpecimensPrepare five specimens from each roll in both the longitudinal and transverse direction for each temperatureto be tested. Specimens shall be 25 mm 1 in. 65 % wide b
48、y 150 mm 6 in. 65 % long. Remove the release liner from eachspecimen.7.6.2 ConditioningTest at the temperature specified for compliance in Table 1 (29C 20F). Allow the refrigeration unit,mandrel and specimens to equilibrate for a minimum of 2 h.7.6.3 Procedure:7.6.3.1 After the specimens have been c
49、onditioned, position the center of the specimen firmly on the mandrel with theweathering side up. Bend the projecting ends without exerting any stress other than that required to keep the specimen in contactwith the mandrel. Complete the entire procedure inside the refrigerated unit within 261 s. Bend the specimen until the projectingends of the specimen are parallel to each other keeping the bottom surface in contact with the mandrel through an arc
