Trang 1 [AMERICAN NATIONAL] WBSTANDARDMV ANSI/ASTM D 250 - IT Standard Specification for ASPHALT-SATURATED ASBESTOS FELT USED IN ROOFING AND WATERPROOFING1 This Standard is issued under
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn Contact ASTM International (www.astm.org) for the lastest information [AMERICAN NATIONAL] WBSTANDARDMV ANSI/ASTM D 250 - IT Standard Specification for ASPHALT-SATURATED ASBESTOS FELT USED IN ROOFING AND WATERPROOFING1 This Standard is issued under the fixed designation D 250; the number immediately following the designation inriicates the year of original adoption or, in the case of revision, the year of last revision A number in parentheses indicates the year of last reapproval ' NOTE 1—The title was editorially changed in February 1978 NOTE 2—Table 1 was corrected editorially in January 1979 1 Scope Uniform Freight Classification6 1.1 This specification covers asphalt-satu- 3 Classification rated asbestos felts, with or without perfora- tions, for use with asphalts conforming to the 3.1 Asphalt-saturated asbestos felts cov- requirements of Specification D 312 in the ered by this specification are of two types: construction of built-up roofs, and with as- phalts conforming to the requirements of 3.1.1 Type /-Nominal 730 g/m'2 (15 lb/ Specification D 449 in the membrane system square), plain or perforated of waterproofing 3.1.2 Type //-Nominal 1460 g/m2 (30 lb/ NOTE —The values stated in SI units are to be square), plain only regarded as the standard 4 Definitions 2 Applicable Documents 4.1 For definitions of terms such as "felt," 2.1 ASTM Standards: "built-up roofing," and "square," see Defini- D146 Sampling and Testing Bitumen-Satu- tions D 1079 rated Felts and Fabrics Used in Roofing 4.2 For the purpose of sampling, a lot shall and Waterproofing2 consist of the same type and size of roofing D312 Specification for Asphalt Used in felt offered for delivery at one time Roofing2 D449 Specification for Asphalt Used in 5 Ordering Information Dampproofing and Waterproofing'2 D 1079 Definitions of Terms Relating to 5.1 Orders for material purchased under Roofing, Waterproofing, and Bituminous this specification shall include the following: Materials'2 2.2 Federal Standard: 5.1.1 Designation of this specification, Fed Std No 123 Marking for Domestic 5.1.2 Type of material (3.1), and whether Shipment (Civilian Agencies)3 plain or perforated, 2.3 Military Standards:* MIL-R-3423 Packaging of Roofing Felt in 1 This specification is under the jurisdiction of ASTM Rolls Committee D-8 on Roofing, Waterproofing, and Bituminous MIL-STD-129 Marking for Shipment and Materials Storage 2.4 American Trucking Association, Inc.: Current edition approved July 1, 1977 Published Sep- National Motor Freight Classification5 tember 1977 Originally published as D 250 - 26 T Last 2.5 Uniform Classification Committee: pre2vious edition D 250 - 70 Annual Book of ASTM Standards, Part 15 3 Available from General Services Administration, Washington, D.C 20402 4 Available from Naval Publications and Forms Center, 5801 Tabor Ave., Philadelphia, Pa 19120 5 Available from American Trucking Association, Inc., 1616 P St N.W., Washington, D.C 20036 6 Available from Uniform Classification Committee, 212 Union Station, Chicago, 111 60606 263 5.1.3 Quantity of rolls, D250 5.1.4 Special sampling, inspection, and certification procedures, if required, and 9.2 Determine the openness of the perfo- 5.1.5 Special packaging, packing, and rations in saturated felts by the following marking procedures (13.3 and 13.5), if re- method: quired 9.2.1 Cut three adjacent 305-mm (12-in.) 6 Materials and Manufacture ± 0.5 % square specimens across the width of the felt Determine the number of perfora- 6.1 The felt shall be produced from at least tions per specimen by multiplying the number 85 % by mass of asbestos fiber The surface of of perforations per row by the number of the felt shall be uniform and relatively rows Correct for differences when rows are smooth Upon splitting or tearing on the bias, off-set from each other Calculate the average the felt shall appear reasonably free of lumps number of perforations per unit area 6.2 In the process of manufacture, a single 9.2.2 Place the specimen on a sheet of thickness of asbestos felt shall be saturated white paper with the smoother side up (side with an asphaltic saturant from which the needling or perforating device enters the felt) Use a 50-mm (2-in.) wide 7 Physical Requirements natural or nylon bristle paint brush to apply uniformly 15 to 20 cm3 of SAE No 10 or 7.1 Asphalt-saturated asbestos felt shall 10W grade motor oil to each specimen Apply neither crack nor be so sticky as to cause the oil with smooth strokes and without undue tearing or other damage upon being unrolled pressure on the brush Complete the initial at ambient temperatures above 10°C (50°F) application in one minute and continue to brush out the oil on the surface for an addi- 7.2 The material shall conform to the phys- tional minute ical requirements prescribed in Table 1 and the dimensions and masses prescribed in Ta- 9.2.3 Lift the perforated felt from the pa- ble 2 per upon completion of brushing and count the oil spots showing on the white paper be- 7.3 Plain and perforated felts shall con- neath as open perforations Calculate the dec- form to the same requirements as the imper- imal fraction of holes open on the basis of the forate (plain) type except that the perfora- total number of holes determined in 9.2.1 tions shall be uniformly spaced Average the results of three determinations and report 8 Workmanship, Finish, and Appearance 9.2.4 Measure the size of the perforations 8.1 The felt shall be thoroughly and uni- using an optical comparitor If round, record formly saturated, and shall show no unsatu- diameter of the holes If square or rectangu- rated spots at any point upon cutting 50-mm lar, record appropriate dimensions Calculate (2-in.) wide strips at random across the entire the average area of the perforations sheet and splitting them open for their full length 9.2.5 Determine the average venting area by the formula: 8.2 The surface of the felt shall not be coated or covered with talc or other substance V=PxA xH that would tend to interfere with adhesion between the felt and plying cement where: V = vented area, mm2/m2 (in.2/ft2), 8.3 The finished material shall be free of P — average number of holes/m2 (average visible external defects, such as holes, ragged or untrue edges, breaks, cracks, tears, protu- number of holes/ft2), berances and indentations, except for inten- A = average area at one hole, mm2 (in.2), tionally provided perforations and the associ- ated protuberances and H = decimal fraction of open holes (dimen- 9 Sampling and Test Methods sionless) 9.1 Sample the material and determine the properties enumerated in this specification in 10 Inspection accordance with Methods D 146 10.1 Unless otherwise specified in the pur- chase contract, the supplier is responsible for inspection and may use his own or any other 264 suitable facilities to establish conformance of D250 the material to the requirements of this speci- fication The purchaser retains the right to and the knowledge that maintenance of his inspect the material to assure himself of com- process and quality control standards ensures pliance with all requirements compliance 11 Rejection and Rehearing 13 Packaging, Marking, Shipping, and Pres- ervation 11.1 Failure to conform to any of the re- quirements prescribed in this specification 13.1 Asphalt-saturated asbestos felt shall shall constitute grounds for rejection In case be furnished in 914-mm (36-in.) wide rolls of rejection, the supplier shall have the right The rolls need not be wound on cores Unless to reinspect the rejected material and resub- otherwise specified in the contract or purchase mit the lot after removal of those packages not order, rolls of saturated felt shall be wrapped conforming to the requirements in a material of sufficient width to securely bind the roll to prevent its shifting position 12 Certification No roll shall contain more than two pieces of felt, and no more than 3 % of the rolls in any 12.1 Upon request of the purchaser in the shipment shall contain two pieces contract or order, a manufacturer's certifica- tion that the material was manufactured and 13.2 Containers and packing shall comply tested in accordance with this specification, with National Motor Freight Classification together with a report of the test results, shall rules or Uniform Freight Classification rules be furnished at the time of shipment 13.3 When specified in the contract or pur- 12.2 Upon the request of the purchaser in chase order, rolls of felt shall be prepared for the contract or order, the certification of an shipment in accordance with the provisions of independent third party indicating conform- MIL-R-3423, Level A or C ance to the requirements of this specification may be accepted instead of the manufacturer's 13.4 Unless otherwise specified in the pur- certification chase order or contract, each package shall be plainly marked with the manufacturer's name, 12.3 Unless otherwise specified in the pur- brand name, felt type and area, and shall bear chase contract, the manufacturer may certify the notation "asphalt." that the material meets all requirements of this specification based upon previous testing 13.5 When specified in the contract or pur- chase order, individual rolls and pallets shall be marked in accordance with Fed Std No 123 for civilian agencies and MIL-STD-129 for military agencies TABLE 1 Physical Requirements of Asphalt-Saturated Asbestos Felt Type I Type II Average breaking strength, 3.5(20)f 7.0(40)f min, kN/m (lbf/in.) of 1.75(10)f 3.5(20)f width: 2 With fiber grain Across fiber grain 2 Pliability, number of failures, 5 5 max: 13-mm (72-in.) radius bend 19-mm (3/4-in.) radius bend Loss on heating, max, % 265 D250 TABLE 2 Dimensions and Masses of Asphalt-Saturated Asbestos Felt Type I Type II Width of roll, mm (in.) 914(36)±0.7 % Area of roll As agreed between purchaser and Net mass of saturated felt, min, g/m2 (lb/100 ft2) Mass of desaturated felt, min, g/m2, (lb/100 ft2) supplier Mass of saturant (asphalt), min, g/m2 (lb/100 ft2)'1 Perforated felt, average area of individual hole, max, mm2 (in.2) 635(13) 1367(28) Spacing of holes in each row, center to center, mm (in.): 415(8.5) 855(17.5) min max 166(3.4) 342(7.0) Spacing between adjacent rows, center to center, mm (in.): min 9.7 (0.015) max Number of holes/m2 (ft2), min 25(1) Actual venting area, min, mm2/m2 (in.2/ft2) (perforated felt only) 230(9) Thickness of desaturated felt, min, mm(in.) Ash, min, % 130/2) 1.02(0.040) 38(1 lh) 70.0 130(12) 695(0.1) 0.51(0.020) 70.0 The American Society for Testing and Materials takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, is entirely their own responsibility This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years and if not revised, either reapproved or withdrawn Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM Headquarters Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend Ifyou feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, 1916 Race St., Philadelphia, Pa 19103, which will schedule a further hearing regarding your comments Failing satisfaction there, you may appeal to the ASTM Board of Directors 266