ASTM C631-2009 Standard Specification for Bonding Compounds for Interior Gypsum Plastering《内部石膏粉刷用粘合化合物标准规范》.pdf
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1、Designation: C 631 09Standard Specification forBonding Compounds for Interior Gypsum Plastering1This standard is issued under the fixed designation C 631; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A
2、 number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This specification covers minimum requirements forbonding compounds for adhering interior gypsum plaster tostructurally sound surface
3、s.1.2 This specification also covers test methods for determin-ing performance requirements and physical properties.1.3 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information onlya
4、nd are not considered standard.1.4 The following safety hazards caveat pertains only to thetest methods described in this specification: This standard doesnot purport to address all of the safety concerns, if any,associated with its use. It is the responsibility of the user of thisstandard to establ
5、ish appropriate safety and health practicesand determine the applicability of regulatory limitations priorto use.2. Referenced Documents2.1 ASTM Standards:2C11 Terminology Relating to Gypsum and Related Build-ing Materials and SystemsC 28/C 28M Specification for Gypsum PlastersC 472 Test Methods for
6、 Physical Testing of Gypsum, Gyp-sum Plasters and Gypsum ConcreteC511 Specification for Mixing Rooms, Moist Cabinets,Moist Rooms, and Water Storage Tanks Used in theTesting of Hydraulic Cements and Concretes3. Terminology3.1 DefinitionsFor definitions relating to gypsum andrelated building materials
7、 and systems, see Terminology C11.4. Physical Properties4.1 GeneralThe bonding compound shall be a film form-ing, non-oxidizing, non-toxic, non-flammable compositionsuitable for application by brush, roller, and spray. Thecompound shall be tinted to show, by visual inspection, whereit has been appli
8、ed. The tinting material shall not show throughthe material being bonded. The surfaces to which bondingcompounds are applied shall be relatively smooth, clean, anddry. Surface coatings shall be removed if their nature indicatesan unsatisfactory condition. Surfaces shall be prepared inaccordance with
9、 the manufacturers directions.4.2 ConsistencyThe bonding compound shall be of ahomogeneous nature with no settling of the solids. Thecompound shall be free of foreign matter, and when applied inaccordance with the manufacturers directions, shall coverevenly.4.3 Film CharacteristicsA dry film of the
10、bonding com-pound shall be uniform and smooth and shall remain flexible.The film shall not be noticeably affected by mild acid or alkali.5. Performance Requirements5.1 Bonding CapabilityA dry film of bonding compoundshall be capable of bonding gypsum plaster immediately afterdrying and 10 days after
11、 drying when tested as specified inSection 12.5.2 DegradationBonding compound that separates shallbe able to be re-mixed to a uniform consistency when tested asspecified in Section 10.5.3 High Temperature StabilityThe bond strength shall benot less than 20 psi (138 kPa) when tested as specified inSe
12、ction 9.5.4 Freeze-Thaw StabilityThe bond strength shall be notless than 20 psi (138 kPa) when tested as specified in Section11.5.5 Bond StrengthBond strength of a fresh sample or a 30day old sample shall be not less than 20 psi (138 kPa) whentested as specified in Section 12.6. Sampling6.1 Take a s
13、ample of not less than 1 kg from each shipmentor consignment for analysis and tests. Except in special cases,take the sample from not less than three separate containers,1This specification is under the jurisdiction of ASTM Committee C11 onGypsum and Related Building Materials and Systems and is the
14、 direct responsibilityof Subcommittee C11.02 on Specifications and Test Methods for Accessories andRelated Products.Current edition approved May 1, 2009. Published May 2009. Originallyapproved in 1988. Last previous edition approved in 2004 as C 631 95a(2004).2For referenced ASTM standards, visit th
15、e 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.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100
16、Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.chosen at random. In addition, take samples from containersthat appear to be nonrepresentative, and test separately. Imme-diately place the samples in airtight glass containers andtransport to the testing laboratory in t
17、hese containers. Takeprecautions to reduce evaporation or drying to a minimum.Thoroughly mix the bonding compound in the container ifthere is a tendency for liquid phase separation.7. Apparatus7.1 Moist CabinetSpecification C511.7.2 OvenA forced draft type oven, having a temperaturecontrolled at 140
18、 6 5F(606 3 C) for high temperature testsand 100 6 5F(386 3 C) for drying of the briquets.7.3 FreezerA freezer having a controlled temperatureof106 2 F (-23 6 1 C).7.4 BalanceAbalance capable of weighing at least 2500 gat a precision of 0.1 g.7.5 Timing DeviceA standard clock or watch with secondhan
19、d.7.6 TamperA tamper made up of a nonabsorptive, non-abrasive, non-brittle material and having a cross section of12in. by 1 in. (13 by 25 mm) and approximately 5 to 6 in. (130to 150 mm) long. The tamping face shall be flat and at rightangles to the length of the tamper.7.7 Straight EdgeA steel strai
20、ght edge not less than 4 in.(100 mm) long and not less than116 in. (1.6 mm) nor more than18 in. (3.2 mm) in thickness.7.8 SpatulaAspatula with a metal blade 6 in. (150 mm) inlength and12 in. (13 mm) in width, with straight edges.7.9 Paint BrushA standard 1 in. (25 mm) wide brush,with natural or synt
21、hetic bristles.7.10 Testing MachineAny type that is of sufficient capac-ity and that is capable of applying the load continuously andwithout shock at the rate of 0.05 in. (1.27 mm)/min, withprovision for adjustment of the rate of loading.7.11 Briquet MoldsThe molds for making test specimensshall be
22、made of metal not attacked by the plaster mortar andshall have sufficient material in the sides to prevent spreadingduring molding. Gang molds, when used, shall be of the typeshown in Fig. 1. The dimensions of the briquet molds shallconform to the following requirements: width of mold, be-tween insi
23、de faces, at waist line of the briquet, 1 in. (25.4 mm)with permissible variations of 60.01 in. (0.25 mm) for moldsin use and 60.005 in. (0.13 mm) for new molds; thickness ofmolds measured at the point of greatest thickness on either sideof the mold at the waist line, 1 in. (25.4 mm) with permissibl
24、evariations of + 0.004 in. (0.10 mm) and 0.002 in. (0.05 mm)for new molds and 0.02 in. (0.5 mm) for molds in use. Theinside faces at the waist line shall have a vertical slot 0.03 in.(0.75 mm) wide by 0.06 in. (1.5 mm) deep to accept thedivider. The briquet specimens shall conform to the dimen-siona
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