1、Designation: C 1375 00 (Reapproved 2009)Standard Guide forSubstrates Used in Testing Building Seals and Sealants1This standard is issued under the fixed designation C 1375; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year o
2、f 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 guide describes the recommended standard sub-strates and their recommended surface preparation for use instanda
3、rd tests of building seals and sealants.1.2 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
4、limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2C33 Specification for Concrete AggregatesC 150 Specification for Portland CementC 305 Practice for Mechanical Mixing of Hydraulic CementPastes and Mortars of Plastic ConsistencyC 566 Test Method for Total Evaporable Moisture Content
5、of Aggregate by DryingC 717 Terminology of Building Seals and SealantsC 1036 Specification for Flat Glass3. Terminology3.1 DefinitionsThe terms used in this guide are in accor-dance with Terminology C 717.4. Significance and Use4.1 The guide provides recommendations for substrates andmethods of surf
6、ace preparation to be used in comparative testsof building seals and sealants.5. Comparison to Other Standards5.1 The ASTM committee with jurisdiction over this stan-dard1is not aware of any comparable standards published byother organizations.6. Glass Substrate6.1 The glass used shall be float glas
7、s, which conforms toSpecification C 1036, Type I, Class 1, q3. This corresponds toa glass that is formed on a float line, is transparent, clear, andintended for architectural fenestration applications.6.2 Float glass has two surfaces, which are not necessarilyidentical in surface chemistry. There is
8、 a tin side, which was incontact with a batch of molten tin, and an air side, which didnot have this intimate contact. These two surfaces may or maynot have the same adhesion properties with a given sealant. Itis best to test both surfaces for control of testing. If only onesurface is to be tested,
9、however, it is preferred to use the airside as this is likely a more consistent surface.6.3 Determination of Air Side Versus Tin Side:6.3.1 Clean the glass as described in 6.4.6.3.2 Expose the substrate to the radiation from a shortwavelength UV light source of approximately 254 nm. The tinside will
10、 fluoresce and display a hazy white reflectance. The airside will not show this effect under the same UV light.(WarningProtect eyes and skin from exposure to UV lightwhen using a UV light source.)6.4 Surface PreparationThe substrate should be cleanedthoroughly with a solution of 50 % isopropyl alcoh
11、ol (IPA) and50 % deionized or distilled water and wiped with a clean, lintfree, soft cloth or paper towel. Prepared specimens must beused within the same working day. Check surfaces for clean-liness by running distilled or deionized water over the glasssurface held in a vertical position. Cleaned pa
12、rts must passwater-break inspection as indicated by maintenance of acontinuous film of water on the surface for not less than 30 s.Panels failing the water-break inspection should be recleaneduntil the surface can maintain the continuous film of water.7. Aluminum Substrates7.1 The aluminum shall be
13、one of two materials, dependingon the test sample configuration:7.1.1 For tests requiring a sheet, less than 6 mm thick, thesheet shall be made of aluminum alloy 5005-H34.7.1.2 For tests requiring a thicker plate, 6 mm or greater, theplate shall be made of aluminum alloy 6063-T5.1This guide is under
14、 the jurisdiction ofASTM Committee C24 on Building Sealsand Sealants and is the direct responsibility of SubcommitteeC24.10 onSpecifica-tions, Guides and Practices.Current edition approved June 1, 2009. Published June 2009. Originallyapproved in 1997. Last previous edition approved in 2005 as C 1375
15、 00(2005).2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Driv
16、e, PO Box C700, West Conshohocken, PA 19428-2959, United States.7.2 The aluminum for either a sheet or plate shall have aclear, Class II anodized finish conforming to AA-M12C22A31(refer to Aluminum Association Circular 45). The anodizedsurface shall be sealed using a hot water process.37.3 Surface P
17、reparationThe substrate should be cleanedthoroughly with a solution of 50 % isopropyl alcohol (IPA) and50 % dionized or distilled water and wiped with a clean, soft,lint-free cloth or paper towel. At the request of the manufac-turer, cleaning with methyl ethyl ketone or similar solvent mayprecede th
18、e isopropyl wash. Panels must pass the water-breakfree test described in 6.4. Prepared substrates must be usedwithin the same working day.8. Mortar Substrates8.1 Mortar substrates shall be prepared from Portland Ce-ment, Type III High Early Strength, conforming to Specifi-cation C 150, concrete sand
19、 conforming to Specification C33,and potable water.8.2 Equipment Needed to Prepare Mortar Substrates:8.2.1 Flat metal pan large enough to hold 50 g of sand.8.2.2 Balance accurate to 6 0.01 g.8.2.3 Oven capable of maintaining 110C 6 5C.8.2.4 Desiccator.8.2.5 Molds made from metal or wood, lined with
20、polyeth-ylene. The desired final size of the test block will determine thedimensions of the mold.8.2.6 Paddle type mortar mixer or laboratory Hobart-typemixer.8.2.7 Metal finishing trowel.8.2.8 Plastic to cover molds or moist cabinet.8.2.9 Container for storing mortar substrates in lime water.8.2.10
21、 Plastic or natural bristle scrub brush.8.2.11 Surface grinder, grinding wheel, or belt sander withNo. 60 silicon carbide or aluminum oxide grinding medium.8.2.12 Masonry saw with wet cut diamond blade, optional.8.3 Preparation of Sand:8.3.1 The sand shall be clean and free of contaminants,according
22、 to the requirements of Specification C33.8.3.2 Determine the moisture content of the sand accordingto Test Method C 566 with the following exceptions:8.3.2.1 Test in duplicate.8.3.2.2 Determine the moisture content as a decimal, not apercent. This value may be determined by dividing percentmoisture
23、 content by 100.8.3.2.3 Determine the mean moisture content of the twosand samples (MC). This factor will be used when measuringthe weight of the sand in the mix to normalize the watercontent.8.4 Mortar Recipe:8.4.1 Determine the total weight needed to fill the mold(s) toprepare the mortar substrate
24、s. Use 2.3 g/cm3(0.083 lbs/in.3)asthe density of the wet mortar. Combine the sand, cement, andwater according to the following ratio by weight:1 part Type III Portland Cement2parts+2MCSand0.5 part 2 MC Waterwhere MC is the moisture content of the sand expressed as a decimal as deter-mined in 8.3.2.8
25、.4.2 For example, if 1000 g total mortar are required to fillthe mold, and the MC of the sand has been determined to be0.10, then the total weight of sand added must be increased by10 % or 57.1 g and the amount of water actually added must bereduced by the same amount. The recipe now becomes:1 part
26、= 286 g Type III Portland Cement2parts+2MC=571+57.1= 628.1 g wet sand0.5 part 2 MC = 143 57.1 = 85.9 g actual water1000 g total recipe8.5 Mixing ProcedureCombine the sand and the cementin a paddle type mortar mixer, if mixing large quantities, or aHobart-type mixer, if preparing small quantities of
27、mortar forlaboratory use. For paddle-type mixers, mix until homogenousin color and texture. Add the water slowly, making severaladditions and allowing it to blend thoroughly between addi-tions. Once the last portion of water had been added, allow themortar to mix for 2 to 5 min more to assure comple
28、te mixing.For Hobart-type mixer, mix as described in 8.1 of PracticeC 305.8.6 Mold FillingTransfer the wet mortar to the mold(s) inat least two equal lifts. Shake the molds between lifts to levelthe concrete and work out any trapped air. Scrape the concreteflat and level with the top of the mold, an
29、d push away anystanding water with the edge of a steel trowel. Work the surfacewith the trowel only enough to make it smooth and level. Donot overwork the mortar or a thick laitance layer will accumu-late during curing.8.7 Curing:8.7.1 Loosely cover molds with plastic or transfer them to amoist cabi
30、net at 100 % relative humidity for 24 h. Remove themortar from the molds and finish curing underwater in cleansaturated lime water for six days.NOTE 1The water is considered to be saturated when lime precipitatesfrom the solution and forms a layer of white material in the bottom of thecontainer.8.7.
31、2 Store blocks in saturated lime water until ready for useor further processing.8.8 Cutting and Grinding:8.8.1 Mortar may be molded into large blocks and cut tosubstrate size using a masonry saw with a wet cut diamondblade. Finished substrates shall be rinsed in clear water andscrubbed clean with a
32、plastic or natural bristle scrub brush toremove loose mortar dust left there by the saw. The cut surfaceshall be used as the test surface.8.8.2 Mortar may be molded into blocks of the correct sizefor substrates initially.After the cure cycle is complete, removethe surface laitance and expose the emb
33、edded aggregate bygrinding with 60 grit aluminum oxide or silicon carbide. Asurface grinder, grinding wheel or belt sander may be used tosurface the blocks. Continue surfacing the face of the blockuntil the aggregate is uniformly exposed. Rinse the finishedblocks in clear water and scrub them with a
34、 plastic or naturalbristle scrub brush to remove loose mortar dust left there by thegrinder. The face surfaced by grinding shall be used as the testsurface.3Aluminum Association Circular 45 Designation System for Aluminum Fin-ishes.C 1375 00 (2009)28.9 StorageReturn the finished substrates to lime w
35、ateruntil needed for use. Just before use, rinse the blocks underrunning tap water and allow them to dry in an oven at 110C6 5C for 30 min. Allow the substrates to cool to roomtemperature in a desiccator.9. Keywords9.1 aluminum; glass; mortar; substrate; surface preparationASTM International takes n
36、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
37、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
38、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
39、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).C 1375 00 (2009)3
