1、Designation: D1779 98 (Reapproved 2011)Standard Specification forAdhesive for Acoustical Materials1This standard is issued under the fixed designation D1779; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision
2、. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () 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 bonding
3、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 enco
4、unteredand 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 an u
5、nsatis-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 that
6、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 than 1
7、21 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 be a
8、pplied 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 al
9、lportions. 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 tile
10、 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 service.
11、 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 adhesive
12、s 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 itsel
13、f 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 giv
14、en 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 regulator
15、y limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2C37/C37M Specification for Gypsum Lath3D618 Practice for Conditioning Plastics for TestingD907 Terminology of AdhesivesE104 Practice for Maintaining Constant Relative Humidityby Means of Aqueous Solutions1This specification is und
16、er the jurisdiction of ASTM Committee D14 onAdhesives and is the direct responsibility of Subcommittee D14.70 on ConstructionAdhesives.Current edition approved Jan. 1, 2011. Published January 2011. Originallyapproved in 1960. Last previous edition approved in 2004 as D1779 98 (2004).DOI: 10.1520/D17
17、79-98R11.2For 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.3Withdrawn. The last approved version of this histor
18、ical standard is referencedon www.astm.org.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.2.2 Federal Specification:MMM-A00150B Interim Federal Specification forAcoustical Materials43. Terminology3.1 DefinitionsMany terms in this sp
19、ecification are de-fined in Terminology D907.4. General Requirements4.1 CompositionThe adhesive must be of uniform com-position. It must be free from all ingredients that will affect theserviceability 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 Workmanship
21、The 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 sag
22、 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 exceed
23、15 % 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 per
24、mit 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 orc
25、onsistency 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 f
26、or 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 immedi
27、ately 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 Deter
28、mine 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 rea
29、dily, 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 cle
30、an 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 b
31、e 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 C37/C37M. Prepare tensile-adhesion test specimens having adhesive layers of 0.5 and 0.9cm (316 and38 in.) at 20 to 30C (68 to 86F) and 50 6 5%relative humidity by applying the adhesive to the uppergypsum lath disk and pressing the lower disk until th
33、e desiredadhesive layer thickness is obtained. Attach a cup hook orsimilar device to each face of the specimen, the top one tosuspend the specimen and the lower one from which to hangthe weight. Prepare a minimum of three specimens with eachadhesive thickness for each temperature. Subject the specim
34、ensfor each test to the conditions of test within 5 min afterpreparation in the order listed in Table 1.4Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http:/dodssp.daps.dla.mil.TABLE 1 Strength Test RequirementsTestAdhe
35、siveThickness,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) 21to27 0 (0) 506 52449 7.78 (134) 10 723 0.9 (38) 21to275.56(114)506 57221 to 27 (114) 80to85 724 0.9 (38) 21to27 0 (0) 506 52449 3.34 (34) 10 72ASatura
36、ted salt solutions for maintaining constant relative humidity are given inPractice E104.D1779 98 (2011)27.1.4 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 c
37、m (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 t
38、he specimen in air and then in watercontaining about 1 % of an alkyl aryl sulfonate wetting agent,5and 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 thefirst 14 days rotate the
39、 specimen through 90 deg each day.Measure the volume of the adhesive again and 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
40、at 49 6 2C(120 6 3.6F).7.1.5 CrackingSpread a 0.3-cm (18-in.) thick layer of theadhesive 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 cracki
41、ng.7.1.6 Migration or Bleeding TestPlace 10 6 0.1 g of theadhesive between two 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 (12
42、0 63.6F) for 28 days. At the end of the 28-day period, examinethe glass surface 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 adhesiv
43、e at (1)506 2C (1226 3.6F) for 4 weeks, and (2) 186 2C (0 6 3.6F) for 3 daysin 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, a
44、nd examine the adhesivespecimens for changes in volume and consistency, segregation,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 D618 to achieve standardizatio
45、n.8. Packaging and Package Marking8.1 PackagingThe adhesive must be packaged in 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 p
46、oint of delivery, unlessotherwise specified in the contract or order.8.2 MarkingShipping 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 take
47、s 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 such rights, are entirely their own res
48、ponsibility.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 address
49、ed 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 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 mul
