1、Designation: D 1779 98 (Reapproved 2004)Standard Specification forAdhesive for Acoustical Materials1This standard is issued under the fixed designation D 1779; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revisi
2、on. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 This specification covers an adhesive for bondi
3、ng pre-fabricated acoustical materials to the inside walls and ceilingsof rooms in buildings. This adhesive is required to maintain atensile adhesion (bond strength) of not less than 3.45 3 104dynes/cm2(12 lb/in.2) for a long period of time under thetemperature and moisture conditions likely to be e
4、ncounteredand to maintain sufficient plasticity to allow for movement ofparts of the building as it ages.NOTE 1Cleanliness of SurfaceThe surface to which the acousticalmaterial is applied with the adhesive should be clean, sound, and dry.Surface coatings should be removed if their nature indicates a
5、n unsatis-factory installation, so that the adhesive can be applied to the base. Whenthe adhesive is to be applied on a painted surface, test tile should beapplied for 48 h to determine suitable adherence of the coating byexamination. Acoustical adhesives are not intended to be applied tosurfaces th
6、at are moist and that have an alkaline reaction, or that may laterbecome moist or alkaline. Such surfaces, as concrete or plaster, should beproperly dried and aged before applying the adhesive.NOTE 2LoadThis adhesive is not recommended as a sole means ofholding acoustical materials weighing more tha
7、n 121 kg/m2(212 lb/ft2)toceiling surfaces.NOTE 3Amount and Condition of MaterialIt is recommended thatsufficient adhesive be used so that there is a contact surface of not less than1.2 3 104cm2/m2(20 in.2/ft2) of acoustical material, with a minimumthickness of 0.3 cm (18 in.) and that the adhesive b
8、e applied in fourseparate nearly spherical portions of approximately equal size near thecorners for a standard 30.5 by 30.5-cm (12 by 12-in.) tile. Fewer than ormore than four portions for 30.5 by 30.5-cm tile are not recommended dueto difficulty in leveling and in securing effective contact area on
9、 allportions. Adhesives that are hard, or do not wet the surface, or are difficultto spread should not be used.NOTE 4Rigidity of Base SurfacesIt is necessary that the materialforming the base to which the adhesive is attached should be relativelysmooth, firm, and rigid. If the pressure of applying t
10、ile and adhesivecauses the base material to deflect excessively, tile previously applied mayhave their adhesive bond broken. This occurs on some types of gypsumboard suspension systems.NOTE 5AgingTo date, no accelerated aging tests for adhesives havebeen developed to duplicate exactly aging in servi
11、ce. The aging tests inthis specification are designed to accelerate the aging process and to testvarious manifestations of aging, and are intended to be satisfactory forcomparing one adhesive with another; they do not necessarily reflect agingcharacteristics on an absolute basis. Purchasers of adhes
12、ives shouldreceive from the manufacturer additional warranties and assurances ofperformance of the adhesive under normal aging.NOTE 6Erection PracticesProper erection techniques are essentialfor proper performance of any acoustical adhesive. Use of a materialmeeting this specification will not in it
13、self guarantee satisfactory perfor-mance. Only when tiles are applied by skilled and experienced workersfollowing instructions from the manufacturer can the purchaser be assuredof satisfactory performance of an adhesive.1.2 The values stated in SI units are to be regarded as thestandard. The values
14、given in parentheses are for informationonly.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 this standard to establish appro-priate safety and health practices and determine the applica-bility of regula
15、tory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2C 37 Specification for Gypsum LathD 618 Practice for Conditioning Plastics for TestingD 907 Terminology of AdhesivesE 104 Practice for Maintaining Constant Relative Humidityby Means of Aqueous Solutions2.2 Federal Specification
16、:MMM-A00150B Interim Federal Specification forAcoustical Materials33. Terminology3.1 DefinitionsMany terms in this specification are de-fined in Terminology D 907.4. General Requirements4.1 CompositionThe adhesive must be of uniform com-position. It must be free from all ingredients that will affect
17、 the1This specification is under the jurisdiction of ASTM Committee D14 onAdhesives and is the direct responsibility of Subcommittee D14.70 on ConstructionAdhesives.Current edition approved April 1, 2004. Published April 2004. Originallyapproved in 1960. Last previous edition approved in 1998 as D 1
18、779 98.2For 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.3Available from Standardization Documents Order Desk,
19、DODSSP, Bldg. 4,Section D, 700 Robbins Ave., Philadelphia, PA 19111-50981Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.serviceability of the adhesive or have a deleterious effect on theacoustical material or the surface to which the
20、 acousticalmaterial is attached.4.2 ToxicityThe adhesive must not liberate toxic gases orfumes under normal conditions of use and application, norshall it contain irritating substances. The adhesive must containno more than 0.5 % of benzene or volatile chlorinated hydro-carbon solvent.4.3 Workmanshi
21、pThe ingredients and processes usedmust be an adhesive for acoustical materials meeting therequirements of this specification.5. Detail Requirements5.1 ConsistencyThe initial consistency of the adhesivemust adhere to the surfaces being bonded, spread or be capableof being applied readily, and not sa
22、g from walls or drop fromceilings.5.2 WettingThe adhesive must wet completely the sur-faces being bonded.5.3 StrengthThe tensile-adhesion specimens preparedwith the adhesive must not fail under the stress conditionsgiven in the test methods (7.1.3).5.4 ShrinkageThe shrinkage in volume must not excee
23、d15 % when conditioned at 49 6 2C (120 6 3.6F) for 30 days.5.5 CrackingThere must be no evidence of cracking at theexposed surface or at the interface of the glass plate and theacoustical adhesive when aged in air at 49 6 2C (120 63.6F) for 7 days. The adhesive must retain sufficient plasticityto pe
24、rmit indentation by a fingernail.5.6 Migration or Bleeding TestThe vehicle must not passthrough a medium-textured filter paper when tested and con-ditioned at 49 6 2C (120 6 3.6F) for 28 days.5.7 StorageThe adhesive when subjected to the storagetests in 7.1.7 must not change appreciably in volume or
25、consistency or segregate in such a manner that it cannot berestored readily by hand mixing. It must have substantially thesame working qualities as another sample of the same adhesiveof recent manufacture.6. Sampling6.1 Take a sample of not less than 0.980 kg (2 lb) from eachshipment or consignment
26、for analysis and tests. Except inspecial cases, the sample must be a composite taken whenpossible from three or more separate containers, chosen atrandom. Samples must also be taken from containers thatappear to be nonrepresentative, and such samples must betested separately. Place the samples immed
27、iately in airtightcontainers and transport them to the testing laboratory in thesecontainers. Precautions must be taken to reduce evaporation ordrying to a minimum. The adhesive in the can must bethoroughly mixed if there is a tendency for the materials toseparate on standing.7. Test Methods7.1 Dete
28、rmine the properties enumerated in this specifica-tion in accordance with the following test methods:7.1.1 ConsistencyDetermine the consistency of the adhe-sive as received by applying the material to plywood andgypsum board surfaces by hand tools at 20 to 30C (68 to86F). The adhesive must spread re
29、adily, trowel smoothlywithout drag, adhere to the surfaces, and not sag from walls ordrop from ceilings when applied in a thickness of approxi-mately 0.9 cm (38 in.).7.1.2 WettingPlace a fresh portion of the adhesive ap-proximately 2.54 cm (1 in.) thick at a temperature of 20 to30C (68 to 86F) on cl
30、ean surfaces of plywood and of gypsumboard. Press the adhesive immediately with a flat hand toolsuch as a trowel or putty knife to a thickness of about 0.6 cm(14 in.). Immediately thereafter withdraw the hand tool verti-cally without sliding; on withdrawal the area that was under thehand tool shall
31、be completely coated with adhesive.7.1.3 StrengthDetermine the strength with a tensile-adhesion specimen subjected to the dead-weight loads undercontrolled ambient temperatures and relative humidities thatare specified in Table 1. The adherends must be 7 6 0.08-cm(234 6132-in.) disks of gypsum lath,
32、 0.9 cm (38 in.) thick,conforming to Specification C 37. Prepare tensile-adhesion testspecimens having adhesive layers of 0.5 and 0.9 cm (316 and38in.) at 20 to 30C (68 to 86F) and 50 6 5 % relative humidityby applying the adhesive to the upper gypsum lath disk andpressing the lower disk until the d
33、esired adhesive layerthickness is obtained. Attach a cup hook or similar device toeach face of the specimen, the top one to suspend the specimenand the lower one from which to hang the weight. Prepare aminimum of three specimens with each adhesive thickness foreach temperature. Subject the specimens
34、 for each test to theconditions of test within 5 min after preparation in the orderlisted in Table 1.7.1.4 ShrinkageDetermine the shrinkage by measuringthe change in volume of an adhesive conditioned at 49 6 2C(120 6 3.6F) for 30 days. Place a brass ring 7 cm (234 in.) ininside diameter and 0.5 cm (
35、316 in.) deep on a block of solidcarbon dioxide and fill with the acoustical adhesive. Level thetop surface of the adhesive with a straightedge. Remove thering containing the adhesive from the solid carbon dioxide andcondition in a vertical position at 23 6 1C (73.4 6 1.8F) toequilibrium. Weigh the
36、specimen in air and then in watercontaining about 1 % of an alkyl aryl sulfonate wetting agent,4and determine the volume of the adhesive from the differencesin weight. Place the specimen in a vertical position andcondition it for 30 days at 49 6 2C (120 6 3.6F). During the4Santomerse S manufactured
37、by Monsanto Co. is an example of this type.TABLE 1 Strength Test RequirementsTestAdhesiveThickness,cm (in.)Temperature,CLoad, N (lbf)RelativeHumidity,%ADuration,h1 0.5 (316) 21to2710.01(214)506 57221 to 27 (214) 80to85 722 0.5 (316) 21 to 27 0 (0) 50 6 52449 7.78 (134) 10 723 0.9 (38) 21to275.56(114
38、)506 57221 to 27 (114) 80to85 724 0.9 (38) 21 to 27 0 (0) 50 6 52449 3.34 (34) 10 72ASaturated salt solutions for maintaining constant relative humidity are given inPractice E 104.D 1779 98 (2004)2first 14 days rotate the specimen through 90 deg each day.Measure the volume of the adhesive again and
39、calculate thepercent shrinkage as follows:S 5 V1 V2!/V1# 3 100 (1)where:S = percent shrinkage,V1= volume of the adhesive after 24 h at room tempera-ture, 20 to 30C (68 to 86F), andV2= volume of the adhesive after 30 days at 49 6 2C(120 6 3.6F).7.1.5 CrackingSpread a 0.3-cm (18-in.) thick layer of th
40、eadhesive on a glass plate, 10.16 by 10.16 cm (4 by 4 in.), andplace immediately in an oven at 49 6 2C (120 6 3.6F) fora period of 7 days. After the specimen has cooled to 23 6 1C(73.4 6 1.8F), examine visually for cracking.7.1.6 Migration or Bleeding TestPlace 10 6 0.1 g of theadhesive between two
41、pieces of medium-textured filter paper.Press the assembly between flat plates to a thickness of 0.5 cm(316 in.). Place the pad of adhesive containing the two filterpapers on a flat glass plate and condition at 49 6 2C (120 63.6F) for 28 days. At the end of the 28-day period, examinethe glass surface
42、 for indication of passage of the vehiclethrough the filter paper.7.1.7 StorageThe storage conditions (Note 7) shall beprescribed by the purchaser. If none are given they shall be asfollows: Store specimens of the adhesive at (1)506 2C (1226 3.6F) for 4 weeks, and (2) 186 2C (0 6 3.6F) for 3 daysin
43、tightly sealed 0.9-L (1-qt) metal cans with friction seals(preferably the original containers). Fill the cans with adhesive.Allow the cans and their contents to come to room temperature,20 to 30C (68 to 86F), open them, and examine the adhesivespecimens for changes in volume and consistency, segrega
44、tion,ability to be reconstituted by hand mixing, and workingqualities as compared with a fresh sample of the sameadhesive.NOTE 7It is recommended that the conditions be selected fromPractice D 618 to achieve standardization.8. Packaging and Package Marking8.1 PackagingThe adhesive must be packaged i
45、n standardcommercial containers of approximately 3.78 and 18.92-L (1and 5-gal) capacity. The containers must be constructed toensure acceptance by common or other carriers for safetransportation at the lowest rate to the point of delivery, unlessotherwise specified in the contract or order.8.2 Marki
46、ngShipping containers must be marked with thename of the adhesive, the quantity contained therein, the nameof the manufacturer, and the batch number.9. Keywords9.1 acoustical; adhesive; specificationASTM International takes no position respecting the validity of any patent rights asserted in connect
47、ion 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 responsibility.This standard is subject to revision at any time by the responsibl
48、e 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 to ASTM International Headquarters. Your comments will receive careful cons
49、ideration 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 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 abovead
