1、Designation: C1247 09C1247 14Standard Test Method forDurability of Sealants Exposed to Continuous Immersion inLiquids1This standard is issued under the fixed designation C1247; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the ye
2、ar of last 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 that assists in determining the durability of a sealant and its a
3、dhesion to asubstrate while continuously immersed in a liquid. This test method tests the influence of a liquid on the sealant and its adhesionto a substrate. It does not test the added influence of constant stress from hydrostatic pressure that is often present with sealantsused in submerged and be
4、low-grade applications, nor does it test the added influence of stress from joint movement whileimmersed. This test method also does not (in its standard form) test the added influence of acids or caustics or other materials thatmay be in the liquid, in many applications.1.2 The values stated in SI
5、units are to be regarded as the standard. The inch-pound given in parentheses are provided forinformation only.1.3 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 safe
6、ty and health practices and determine the applicability of regulatorylimitations prior to use.2. Referenced Documents2.1 ASTM Standards:2C33 Specification for Concrete AggregatesC109/C109M Test Method for Compressive Strength of Hydraulic Cement Mortars (Using 2-in. or 50-mm Cube Specimens)C150 Spec
7、ification for Portland CementC717 Terminology of Building Seals and SealantsC719 Test Method for Adhesion and Cohesion of Elastomeric Joint Sealants Under Cyclic Movement (Hockman Cycle)2.2 ISO StandardsISO 13638 Building Construction-Sealants-Determination of Resistance of Prolonged Exposure to Wat
8、er33. Terminology3.1 Definitions:3.1.1 Definitions of the following terms used in this test method are found in Terminology C717: adhesive failure; cohesivefailure; compound; cure; hydrostatic pressure; joints; primer; sealant; self-leveling sealantsealant; standard conditions; andsubstrate.4. Summa
9、ry of Test Method4.1 Specimens are prepared and the sealant is cured. The specimens are immersed in a hot liquid at 50 6 2C (122 6 3.6F)for six weeks. At the end of the six weeks, the specimens are placed into a compression/extension machine, as described in TestMethod C719, and cycled through the m
10、ovement range appropriate to the test sealant or its application, or both.4.2 If after three movement cycles at 3.2 mm/h (18 in./h) adhesive or cohesive failure is not noted, the specimens are againplaced in the hot liquid for an additional four weeks and then retested.1 This test method is under th
11、e jurisdiction ofASTM Committee C24 on Building Seals and Sealantsand is the direct responsibility of Subcommittee C24.30 on Adhesion.Current edition approved Jan. 1, 2009Jan. 1, 2014. Published February 2009February 2014. Originally approved in 1993. Last previous edition approved in 20042009 asC12
12、47 98C1247 09.(2004). DOI: 10.1520/C1247-09.10.1520/C1247-14.2 For referencedASTM standards, visit theASTM website, 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.
13、3 Available from American National Standards Institute, 11 W. 42nd Street, 13th Floor, New York, NY 10036.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 version. Becauseit may not be tech
14、nically 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 International, 100 Barr Harbor Drive, PO
15、Box C700, West Conshohocken, PA 19428-2959. United States14.3 This test method consists of six weeks of immersion followed by three extension and compression cycles. This can befollowed by four weeks of further immersion and a repeat of the three extension and compression cycles. The four weeks ofim
16、mersion and subsequent extension and compression testing can be repeated as many times as required for the application.5. Significance and Use5.1 This test method uses elevated temperature to accelerate the degradation of a sealant and its adhesion to a substrate. Thistest method is an accelerated m
17、ethod and will only be a predictor of long-term durability if the actual service temperature issignificantly lower than the elevated test temperature.5.2 This test method can be used as an indicator of longevity but direct correlation to actual use will be difficult for manyapplications.5.3 The corr
18、elation of data from this test method to applications where the sealant joint will have wet and dry cycles will bedifficult since, with some sealants on some substrates, adhesion that is lost during wet periods is regained during dry periods.5.4 This test method is performed in a hot liquid and may
19、be considered an acceleration of deterioration of the sealant or thesealants adhesion to a substrate. Compared to how the sealant will be used in some applications, in some cases, this test may beless severe than the actual application. The benefit from the use of this test method will depend on the
20、 comparison of the conditionsof this test to the actual conditions of use (temperature, duration, nature of substrate, composition of the liquid).5.5 To determine the ability of a sealant to perform in a given application; modification of this procedure will often be requiredand is permissible, as m
21、utually agreed upon by purchaser and seller.6. Apparatus6.1 Water Bath, equipped with a heater to maintain the test bath at 50 6 2C (122 6 3.6F).6.2 Compression/Extension Machine,4designed to automatically compress the joint width of the test specimen from 12 mm (12in.) to the maximum extension desi
22、red at a constant rate of 3.2 mm/h (18 in./h). The machine shall be equipped with grips ofsufficient strength to withstand, without bending, the resistance of high-tensile-strength sealants.6.3 “C” Clamps, or other devices for specimen preparation.6.4 Casting Spacers, for specimen preparation.6.5 Li
23、quid, appropriate to the application for the test bath.NOTE 1The precision and bias statement for this test method is based on the use of distilled water for the test bath.7. Test Specimens7.1 Standard substrates for this test method shall be portland cement mortar and aluminum alloy.NOTE 2The preci
24、sion and bias statement of this test method is based on standard substrates of mortar and aluminum. When requested, only one ortwo of the standard substrates may be tested with the sealant. Likewise, other substrates such as brick, marble, etc., may be specified by the purchaserin place of or in add
25、ition to the standard substrates for test with the sealant sample.7.1.1 Mortar Block5Prepare cement mortar blocks, each 75 by 25 by 25 mm (3 by 1 by 1 in.) in size, using one part of highearly strength portland cement conforming to Type III of Specification C150, to two parts by weight of clean unif
26、ormly graded,concrete fine aggregate (sand) conforming to Specification C33. Use sufficient water to produce a flow of 100 6 5 when testedin accordance with the procedure for the determination of consistency of cement mortar described in Test Method C109/C109M.After curing one day in moist air and s
27、ix days in saturated lime water at 23 6 2C (73 6 3.6F), prepare the surface of one face,25 by 76 mm (1 by 3 in.) of each block by wet grinding either with a belt sander using No. 60 aluminum carbide sanding belt orusing an iron lap with No. 60 silicon carbide (or aluminum oxide) grain, until the agg
28、regate is uniformly exposed. Return blocksto saturated lime water storage until needed.7.1.2 Blocks may be prepared and shipped to other locations for use. The blocks may be shipped dry and returned to lime waterstorage on arrival until needed.7.1.3 Prior to use, wet grind the previously ground face
29、 to remove any laitance, rinse thoroughly under running tap water anddry the blocks overnight at 105 to 110C (220 to 230F). Clean the blocks of film or powder by vigorous brushing with astiff-bristled fiber brush. Condition the blocks at standard conditions for not less than one nor more than seven
30、days.7.1.4 AluminumThe aluminum plates shall be 75 by 25 by 6 mm (3 by 1 by 14 in.) aluminum alloy, 6063-T5 or 6061-T6 withanodizing process AA-MIOC22A31. Prior to use clean the aluminum by wiping the surface with methyl ethyl ketone or similarsolvent. Then dip the surface in a detergent solution. T
31、his should be a 0.04 % solution of alcohol ethoxy sulfate. An alternativewould be a 0.1 % solution of a clear hand dishwashing detergent. These solutions should be made up in distilled water. Rinse thesurface (without touching it) in distilled water and allow it to air dry.4 Series 520 Sealing Compo
32、und Tester, manufactured by Applied Test Systems, Inc., 348 New Castle Road, Butler, PA 16001 has been found suitable for this purpose.5 Prepared concrete blocks are available from Masonry Test Block Company, 6389 Lawdale Road, Saginaw, MI 48604.C1247 142NOTE 3Methyl ethyl ketone and similar solvent
33、s are both toxic and flammable and should be handled with caution in a well-ventilated hood.NOTE 4At the request of the sealant producer, the detergent cleaning step shall be omitted.7.2 PrimersWhere the use of a primer(s) is recommended by the sealant manufacturer, prime substrate materials with th
34、erecommended primer or primers.7.3 Preparation of Test Specimens:7.3.1 Standard conditions of temperature and relative humidity for this test method are defined as 23 6 2C (73.4 6 3.6F) and50 6 5 % respectively.7.3.1 Multicomponent SealantsPrepare three test specimens for each substrate that is to b
35、e used in the test. After maintainingthe unopened sample for at least 24 h at standard conditions, mix thoroughly for 5 min at least 250 g of base compound with theappropriate amount of curing agent. Apply a bead of sealant 12 by 12 by 50 mm (12 by 12 by 2 in.) between parallel 25 by 76mm (1 by 3 in
36、.) faces of similar blocks or plates (see Fig. 1). Use appropriate casting spacer to form the proper size sealant bead.Use non-adhering casting spacers or apply polyethylene adhesive tape or any other suitable inert release agent to the inside surfaceof the spacers to prevent adhesion of the spacers
37、 to the sealant after cure. Use adhesive tape, rubber bands, or clamps to hold thetest assembly together before and after filling it with the sealant. For self-leveling sealants, use masking or any other suitable tapeto retain the sealant.7.3.2 Single-Component SealantsPrepare three test specimens a
38、s described in 7.3.27.3.1 except that no mixing of componentsis required. Condition the sealed sealant cartridge or bulk container at standard conditions at least 24 h before use.8. Conditioning8.1 Cure specimens made with multicomponent sealants for 14 days at standard conditions. During the second
39、 week of thecuring period, make attempts to free the sealant from the casting spacers at the ends and bottom without damaging the sealant bead.FIG. 1 Test SpecimenC1247 1438.2 Cure specimens made with single-component sealants for a total of 21 days as follows: (a) seven days at standardconditions;
40、(b) seven days at 37.8 6 2C (100 6 3.6F) and 95 6 5 % relative humidity; and (c) seven days at standard conditions.Separate the casting spacers from the sealant as soon as practical during the curing period without damaging the sealant.9. Procedure9.1 Remove the spacers and place the cured test spec
41、imens into the 506 2C (122 6 3.6F) test bath, totally immersing themand maintaining them at this condition for six weeks. Use a 3.8 L (1 gal) size container containing 1.9 L (2 qt) of test bath. Mortarand aluminum specimens should be separated and conditioned in separate containers.9.2 After six wee
42、ks immersion, remove the specimens from the test bath, place them immediately into the compression andextension machine and start cycling with the compression mode, using the movement range appropriate to the test sealant or itsapplication, or both. The test is to be conducted at standard conditions
43、.9.3 Cycle the specimens through three compression and three extension cycles.9.4 Remove the specimens, hand flex the specimens to check sealant adhesion by rotating them 60, and examine them foradhesive or cohesive failure. Measure the amount of adhesive or cohesive failure in square millimetres (s
44、quare inches) and recordthese results on the report form. Note also any apparent swelling or change in appearance or contour of the sealant.9.5 Return the specimens to the 50 6 2C (1226 3.6F) test bath for four weeks.After immersion, remove the specimens fromthe test bath. Place them immediately int
45、o the compression and extension machine and start cycling with the compression mode.9.6 Repeat 9.3 and 9.4. If there is not total adhesive or cohesive failure and, if required for the application, repeat 9.5,9.3, and9.4 in that order.10. Report10.1 Report the test results and observations on the for
46、m shown in Fig. 2. Report total square millimetres (square inches) ofadhesion and cohesive failure for all three samples of each substrate tested.10.2 Report the following additional information:10.2.1 Techniques used in substrate preparation including the solvent, primers, or other materials used f
47、or cleaning. If other thanthe standard substrates or different preparation techniques are used, describe them completely,10.2.2 Other pertinent observations on the condition of the sealant or its adhesion or other characteristics, and10.2.3 Any variation in test procedure or cure cycle used.11. Prec
48、ision and Bias611.1 Polyurethane Sealant, Six and Ten Weeks of Water Immersion on Aluminum and Concrete Substrates:11.1.1 Repeatability I(r)The repeatability (within a given laboratory) interval for four test parameters tested by fourlaboratories is 0.0 mm2 (0.0 in.2). In future use of this test met
49、hod, the difference between two test results obtained in the samelaboratory on the same material will be expected to exceed 0.0 mm2 (0.0 in.2) only about 5 % of the time.6 Supporting data have been filed at ASTM International Headquarters and may be obtained by requesting Research Report RR:C24-1043.FIG. 2 Report FormC1247 14411.1.2 Reproducibility I(R)The reproducibility (between given laboratories) interval for four test parameters tested by fourlaboratories is 0.0 mm2 (0.0 in.2). In future use of this test method, the difference betwee
