1、Designation: C 1305 08Standard 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 () 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 i
3、n the substrate.1.2 There are no ISO standards similar or equivalent to thisASTM standard.1.3 The values stated in SI units are to be regarded asstandard. The values given in parentheses are mathematicalconversions to inch-pound units that are provided for informa-tion only and are not considered st
4、andard.1.4 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Refer
5、enced Documents2.1 ASTM Standards:2C33 Specification for Concrete AggregatesC 150 Specification for Portland CementC 717 Terminology of Building Seals and SealantsC 1375 Guide for Substrates Used in Testing Building Sealsand Sealants3. Terminology3.1 DefinitionsRefer to Terminology C 717 for definit
6、ionsof technical terms used in this test method.4. Summary of Test Method4.1 This test method consists of casting five specimens ofmembrane on mortar substrates containing a preexisting crackand allowing them to age 14 days at standard conditionsfollowed by seven days in an air-circulating oven at 7
7、0C(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 indicate a waterproofingmembranes ability to maintain its integrity while bridging apreexisting crack in the substrate at low ambient temperatures,whe
8、n the membrane is least likely to be flexible.6. Comparison to Other Standards6.1 The committee with jurisdiction over this standard is notaware of any comparable standards published by other orga-nizations.7. Apparatus and Materials7.1 Automatic Extension and Compression Machine, withcold box capab
9、le 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.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 c
10、onstruction 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 by 1 in.) notchesin either side, as shown in Fig. 1, for casting mortar blocks.8. Preparation of Substrates8.1 Prepare mortar blocks in sizes required
11、for testing inaccordance with the requirements in Guide C 1375.8.2 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 membrane has been applied.38.3 Other substrates may be used and shall be prepared toprov
12、ide a clean, level test surface. Prepare glass and aluminumsubstrates in accordance with the requirements in Guide1This test method is under the jurisdiction ofASTM Committee D08 on Roofingand Waterproofing and is the direct responsibility of Subcommittee D08.22 onWaterproofing and Dampproofing Syst
13、ems.Current edition approved Dec. 15, 2008. Published January 2009. Originallyapproved in 1995. Last previous edition approved in 2006 as C 1305 06.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandar
14、ds volume information, refer to the standards Document Summary page onthe ASTM website.3A general purpose, gun-grade construction mastic or a structural epoxy cementhas been found suitable for this purpose.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428
15、-2959, United States.C 1375. Other preparation requirements shall be as agreedupon between the supplier and the specifier.9. Conditioning/Mixing9.1 Store all materials to be tested at standard conditions of23 6 2C (73.4 6 3.6F) and 50 6 5 % relative humidity forat least 24 h before any test specimen
16、s 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, and as recommended by the manufacturer.10. Procedure10.1 Five assemblies shall be tested.10.2
17、 To prepare the test assembly, set two blocks as indi-cated in Fig. 1, with sides touching, in a sand bed. Level thetest surface (top) and bind the blocks together using maskingtape. Spread the test compound to a uniform thickness of 1.506 0.10 mm (0.060 6 0.005 in.) over the top area bisected bythe
18、 joint between the blocks. The membrane may be applied inmultiple coats, if recommended by 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 le
19、ast 1 h. Cut a strip of membrane 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 fr
20、om the blocks and place them in thetesting machine, preconditioned to 26C (15F) for at least24 h. Maintaining this temperature, subject the assembly to tencycles of movement, each cycle consisting of pulling theC1305082blocks apart at the rate of 3.2 mm (18 in.)/h until the spacebetween them is 3.2
21、mm and then closing the space at the samerate.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 follow
22、ing information:11.1.1 The number of specimens 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 testin
23、g threematerials.12.2 Since this is a pass-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
24、; waterproofingASTM International takes no 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 s
25、uch rights, are 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 andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for add
26、itional standardsand should be addressed 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 t
27、he ASTM Committee on Standards, at the address 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).C1305083
