1、Designation: C 1305 06Standard Test Method forCrack Bridging Ability of Liquid-Applied WaterproofingMembrane1This standard is issued under the fixed designation C 1305; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of la
2、st revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method covers a laboratory procedure fordetermining the ability of a waterproofing membrane to bridgea crack
3、in the substrate.1.2 The values stated in SI units are to be regarded as thestandard. The inch-pound units given in parentheses are forinformation only.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 thi
4、s standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.1.4 There are no ISO standards similar or equivalent to thisASTM standard.2. Referenced Documents2.1 ASTM Standards:2C33 Specification for Concrete AggregatesC 150
5、 Specification for Portland CementC 717 Terminology of Building Seals and Sealants3. Terminology3.1 DefinitionsRefer to Terminology C 717 for definitionsof technical terms used in this test standard.4. Summary of Test Method4.1 This test method consists of casting five specimens ofmembrane on mortar
6、 substrates containing a preexisting crackand allowing them to age 14 days at standard conditionsfollowed by seven days in an air-circulating oven at 70C(158F), placing them in a test machine, and subjecting theassembly to ten cycles of movement.5. Significance and Use5.1 This test method is used to
7、 indicate a waterproofingmembranes ability to maintain its integrity while bridging apreexisting crack in the substrate at low ambient temperatures,when the membrane is least likely to be flexible.6. Comparison to Other Standards6.1 The committee with jurisdiction over this standard is notaware of a
8、ny comparable standards published by other orga-nizations.7. Apparatus and Materials7.1 Automatic Extension and Compression Machine, withcold box capable of maintaining 26 6 1C (15 6 2F).7.2 Circulating Hot-Air Oven.7.3 Portland Cement, high early strength conforming toSpecification C 150, Type III.
9、7.4 Fine Aggregate, conforming to Specification C33.7.5 Aluminum Angles, 75 by 50 by 25 mm (3 by 2 by 1 in.),if needed.7.6 Epoxy Cement, or gun-grade construction mastic, ifneeded.7.7 Masking Tape.7.8 Molds, six, 50 by 25 by 25 mm (2 by 1 by 1 in.) insidedimensions, or 75 by 88 by 25 mm (0.5 by 1.5
10、by 1 in.) notchesin either side, as shown in Fig. 1, for casting mortar blocks.8. Preparation of Substrates8.1 Mix 1 part by weight of Type III Portland cement with2 parts by weight of fine aggregate and stir in approximately0.7 part by weight of water to produce a uniform mixture.8.2 Pour the mixtu
11、re into the mold and allow to cure oneday at 100 % relative humidity followed by six days in tapwater, both at standard temperature.NOTE 1Prepare five sets of two blocks.8.3 Cut or grind the test surfaces of the mortar blocks toremove laitance and produce a level substrate, free of fins orburrs. If
12、a release coating is used on the mold, only the topsurface of the mortar blocks, not exposed to the release coating,shall be used as the test surface.1This test method is under the jurisdiction ofASTM Committee D08 on Roofingand Waterproofing and is the direct responsibility of Subcommittee D08.22 o
13、nWaterproofing and Dampproofing Systems.Current edition approved May 1, 2006. Published May 2006. Originallyapproved in 1995. Last previous edition approved in 2005 as C 1305-05.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org.
14、For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.8.4 When a quantity of blocks is prepared, they shall bestored in sa
15、turated lime water until needed.8.5 Rinse any residue from the substrates with tap water andallow them to dry overnight in an oven at 70C (158F)minimum.8.6 If required to fit the test assembly into the jaws of thetesting machine, aluminum angles may be adhered to the sidesof the substrates after the
16、 membrane has been applied.38.7 Other substrates may be used, and shall be prepared toprovide a clean, level test surface. Other preparation require-ments shall be as agreed upon between the supplier and thespecifier.9. Conditioning/Mixing9.1 Store all materials to be tested at standard conditions o
17、f23 6 2C (73.4 6 3.6F) and 50 6 5 % relative humidity forat least 24 h before any test specimens are prepared.9.2 Follow the manufacturers instructions for mixing andpreparing membrane materials for testing. Thoroughly stir onecomponent samples before using. Mix two component com-pounds in the ratio
18、 and as recommended by the manufacturer.10. Procedure10.1 Five assemblies shall be tested.10.2 To prepare the test assembly, set two blocks, with 25 by50 mm (1 by 2 in.) sides touching, in a sand bed. Level the testsurface (top) and bind the blocks together using masking tape.Spread the test compou
19、nd to a uniform thickness of 1.52 60.13 mm (0.060 6 0.005 in.) over the top 50 by 100 mm (2 by3A general purpose, gun-grade construction mastic or a structural epoxy cementsuch as 3M 2216 B/A has been found suitable for this purpose.C13050624 in.) area bisected by the joint between the blocks. Theme
20、mbrane may be applied in multiple coats, if recommendedby the manufacturer.10.3 Cure the test assembly 14 days at room temperaturefollowed by seven days in a circulating hot-air oven at 70 62C (158 6 3.6F). Allow the test specimen to cool to roomtemperature for at least 1 h. Cut a strip of membrane
21、6 mm (14in.) away from the edge, across the joint on both sides. Thiswill eliminate edge effects (see Fig. 1). If needed, aluminumangles may be adhered to the sides of the assembly after theroom temperature curing period (see Fig. 1, Option A).10.4 Remove the tape from the blocks and place them in t
22、hetesting machine, preconditioned to 26C (15F) for at least24 h. Maintaining this temperature, subject the assembly to tencycles of movement, each cycle consisting of pulling theblocks apart at the rate of 3.2 mm (18 in.)/h until the spacebetween them is 3.2 mm and then closing the space at the same
23、rate.10.5 Upon completion of the ten cycles, extend the mem-brane to 3.2 mm while still in the machine and examine themembrane for cracking, splitting, pinholes, or any othercondition in the area of the joint in the substrates.11. Report11.1 Report the following information:11.1.1 The number of spec
24、imens which show no failure, asdescribed in 10.5, in ten cycles, and11.1.2 All observable physical changes in the membrane.12. Precision and Bias12.1 The precision and bias calculations for this test methodare based on the results of three laboratories testing threematerials.12.2 Since this is a pas
25、s-fail test, the interlaboratory testingwas conducted only to ascertain agreement between laborato-ries. The test results showed 100 % agreement between thethree laboratories, indicating that this test method is valid.13. Keywords13.1 crack bridging; membrane; waterproofingASTM International takes n
26、o position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own respon
27、sibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed
28、to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the ad
29、dress shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).C1305063
