1、Designation: C 932 06Standard Specification forSurface-Applied Bonding Compounds for ExteriorPlastering1This standard is issued under the fixed designation C 932; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last rev
2、ision. 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. Scope*1.1 This specification covers minimum requireme
3、nts forexterior surface-applied bonding compounds for improving theadhesion of cementitious material to concrete or other masonrysurfaces or any structurally sound surfaces.1.2 This specification also covers test methods for determin-ing performance requirements and physical properties.1.3 The value
4、s stated in inch-pound units are to be regardedas the standard. The SI metric values given in parentheses areapproximate and are provided for information purposes only.1.4 The following safety hazards caveat pertains only to thetest methods described in Sections 9, 10, 11, and 12 in thisspecificatio
5、n: This standard does not purport to address all ofthe safety 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 limitations prior to use.2. Referenced Do
6、cuments2.1 ASTM Standards:2C11 Terminology Relating to Gypsum and Related Build-ing Materials and SystemsC 109/C 109M Test Method for Compressive Strength ofHydraulic Cement Mortars(Using 2-in. or 50-mm CubeSpecimens)C 150 Specification for Portland CementC 305 Practice for Mechanical Mixing of Hydr
7、aulic CementPastes and Mortars of Plastic ConsistencyC511 Specification for Mixing Rooms, Moist Cabinets,Moist Rooms, and Water Storage Tanks Used in theTesting of Hydraulic Cements and ConcretesC 778 Specification for Sand3. Terminology3.1 Definitions used in this specification shall be in accor-da
8、nce with Terminology C11.4. Physical Properties4.1 Surface Applied Bonding CompoundA freeze-thawstable composition, suitable for brush, roller, or spray applica-tion. It shall be tinted to show by visual inspection where it hasbeen applied. The tint shall not bleed through the materialbeing bonded.4
9、.2 ConsistencyThe bonding compound shall be free offoreign matter as determined by visual inspection and shall beof such uniform consistency that when applied in accordancewith the producers directions by brush, roller, or spray toconcrete, masonry, or other structurally sound surface, thebonding co
10、mpound shall flow on evenly and dry uniformly.4.3 Film CharacteristicsThe film-forming property shallbe determined by visual inspection to determine the presenceof a continuous film not broken by fisheyes, cracking, pull-back, or any other discontinuity in the film surface. It shall notbe noticeably
11、 affected by alkaline surfaces or weak acids.4.4 Re-EmulsificationProduct conforming with this speci-fication shall not re-emulsify.5. Performance Requirements5.1 Bonding CapabilityThe bonding compound shall becapable of bonding cementitious materials when applied inaccordance with the producers dir
12、ections and tested as speci-fied in Section 12.5.2 DegradationBonding compound which separatesshall be able to be re-mixed to a uniform consistency whentested as specified in Section 10.5.3 High Temperature TestThe bond strength shall be notless than 150 psi (1034 kPa) when tested as specified in Se
13、ction9.5.4 Freeze-Thaw StabilityThe bond strength shall be notless than 150 psi (1034 kPa) and 100 psi (690 kPa) when testedunder the dry and wet conditions, respectively, as specified inSection 11.1This specification is under the jurisdiction of ASTM Committee C11 onGypsum and Related Building Mate
14、rials and Systems and is the direct responsibilityof Subcommittee C11.02 on Specifications and Test Methods for Accessories andRelated Products.Current edition approved March 1, 2006. Published March 2006. Originallyapproved in 1980. Last previous edition approved in 2005 as C 932 05.2For referenced
15、 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.1*A Summary of Changes section appears at the end of this standard.Copyright
16、 ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.5.5 Tensile Bond StrengthBond strength of a fresh sampleor a 6-month-old sample of bonding compound shall have anaverage tensile strength of not less than 150 psi (1034 kPa) and100 psi (690 kPa)
17、when tested under the dry and wetconditions, respectively, as specified in Section 12.6. Sampling6.1 Take a sample of not less than 2.2 lb (1000 g) from eachshipment or consignment for analysis and tests. Except inspecial cases, take the sample from not less than three separatecontainers, chosen at
18、random. In addition, take samples fromcontainers that appear to be nonrepresentative, and test sepa-rately. Place the samples immediately in airtight glass contain-ers and transport to the testing laboratory in these containers.Take precautions to reduce evaporation or drying to a mini-mum. Thorough
19、ly mix the bonding compound in the containerif there 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 6 5 F (60 6 3 C) for high temperaturetests.7.3 FreezerA freezer having a controlled t
20、emperature of10 6 2 F (-23 6 1 C).7.4 BalanceA balance capable of weighing not less than5.5 lb (2500 g) at a precision of 0.0002 lb (0.1 g).7.5 Timing DeviceAn instrument capable of reading to thenearest second.7.6 TamperA tamper made up of a nonabsorptive, non-abrasive, non-brittle material and hav
21、ing a cross section of12in. by 1 in. (13 3 25 mm) and approximately 5 to 6 in. (130 to150 mm) long. The tamping face shall be flat and at rightangles to the length of the tamper.7.7 Straight EdgeA steel straight edge not less than 4 in.(100 mm) long and not less than116 in. (1.6 mm) nor more than18
22、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 synthetic bristles.7.10 Testing MachineAny type that is of sufficient capac-ity and that is capable of appl
23、ying the load continuously andwithout shock at the rate of 0.05 in. (1.27 mm) per minute, withprovision for adjustment of the rate of loading.7.11 Briquet MoldsThe molds for making test specimensshall be made of metal not attacked by the mortar and shallhave sufficient material in the sides to preve
24、nt spreading duringmolding. Gang molds, when used, shall be of the type shownin Fig. 1. The dimensions of the briquet molds shall conform tothe following requirements: width of mold, between insidefaces, at waist line of the briquet, 1 in. (25.4 mm) withpermissible variations of 60.01 in. (0.25 mm)
25、for molds in useand 60.005 in. (0.13 mm) for new molds; thickness of moldsmeasured at the point of greatest thickness on either side of themold at the waist line, 1 in. (25.4 mm) with permissiblevariations 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 i
26、n use. Thebriquet specimens shall conform to the dimensional require-ments shown in Fig. 2.7.12 SawA table saw equipped with an abrasive cuttingblade or other blade suitable for cutting cementitious materials.7.13 Clips for Briquet Testing MachineThe clips forholding the tension test specimen shall
27、be in accordance withFig. 3.8. Conditioning8.1 Room Temperature and HumidityMaintain the airtemperature in the vicinity of the mixing and testing area at 706 5F(216 3 C). Maintain the relative humidity at 50 62%.8.2 Temperature of the Mixing Water72 6 2F(226 1C).9. High Temperature Test9.1 Significa
28、nce and UseThis test method provides pro-cedures for evaluating the adhesive strength of bonding com-pounds after being exposed to accelerated aging at hightemperature.9.2 Specimen PreparationFor each test specimen, transferthe bonding compound, taken from the sample obtained, into astandard 1 pt. (
29、500 mL) glass container.9.3 ProcedurePlace the specimen in the oven for 30 days.Remove the container, allow the compound to cool to roomtemperature, mix the compound to a uniform consistency, andtest as specified in Section 12.9.4 Tests and RetestsTest six briquets and report theaverage of the test
30、results. If the result of any one of the sixtests varies more than 15 % from the average, reject it andreport the average of the other five tests. If the results frommore than two tests vary more than 15 % from the average,reject the series and retest.9.5 Precision and BiasThe precision and bias of
31、the hightemperature test for determining bond strength after exposureto high temperature are essentially the same as specified in thetest method for bond strength, paragraph 12.7.FIG. 1 Briquet Gang MoldC93206210. Degradation Test10.1 Significance and UseThis test method simulates theeffects of high
32、 temperature storage on the physical propertiesof bonding compound.10.2 Specimen PreparationFor each test, transfer thebonding compound, from the sample obtained, into a standard1 pt. (500 mL) glass container.10.3 ProcedurePlace the specimen in the oven for 15days. Remove the container from the oven
33、 and examine thecontents for settling and separation. Place the container back inthe oven for an additional 15 days. Remove the container andexamine the contents again for settling and separation. Allowthe compound to come to room temperature, and mix to auniform consistency. Mix by hand stirring wi
34、th a wood, metal,or plastic paddle for not more than five minutes.10.4 Tests and RetestsBonding compound that fails to beremixed to a uniform consistency shall be considered to havefailed the test.10.5 ReportDetermine the extent of settling and separa-tion by measuring and report as a percentage of
35、the height ofthe specimen in the clear glass container, represented by thelocation of the liquid/solid interface.10.6 Precision and BiasNo information is presentedabout either the precision or bias of the Degradation test formeasuring settling, separation, or the ability to be mixed to auniform cons
36、istency since the test result is non-quantitative.11. Freeze-Thaw Cycle Test11.1 Significance and UseThis test method provides pro-cedures for determining the bond strength of bonding com-pounds after being exposed to accelerated storage conditions ofalternate freezing and thawing.11.2 Specimen Prep
37、arationFor each test specimen, trans-fer the bonding compound, taken from the sample obtained,into a standard 1 pt. (500 mL) glass container having a screwon or friction fit cover.11.3 ProcedurePlace a covered specimen in the freezerfor 16 h. Remove the specimen and allow to thaw at roomtemperature
38、for 8 h. Repeat this procedure for 5 cycles. Afterthe fifth cycle, allow the compound to come to room tempera-ture, then test as specified in Section 12.11.4 Tests and RetestsTest six briquets and report theaverage of the test results. If the result of any one of the sixtests varies more than 15 % f
39、rom the average, reject it andreport the average of the other five tests. If the results frommore than two tests vary more than 15 % from the average,reject the series and retest.11.5 Precision and BiasThe precision and bias of thefreeze-thaw cycle test for determining bond strength afterexposure to
40、 alternate freezing and thawing are essentially thesame as specified in the test method for bond strength,paragraph 12.7.12. Bond Strength Test12.1 Significance and UseThis test method provides amethod for determining the ability of bonding compound, afterbeing subject to various simulated condition
41、s of aging andexposure to temperature extremes, to adhere cementitiousmaterials to a properly prepared substrate.12.2 Materials:12.2.1 CementSpecification C 150.12.2.2 Graded Standard SandSpecification C 778.12.3 Preparation of Briquets:12.3.1 Prepare not less than six briquets for each series oftes
42、ts.12.3.2 Prepare the proportions of the standard mortar inaccordance with the procedure given in Test Method C 109/C 109M.12.3.3 Mechanically mix the mortar in accordance with theprocedure given in Practice C 305.12.3.4 Prepare molds by coating the molds with a thin filmof mineral oil. Support the
43、molds on a lightly oiled glass ormetal plate.12.3.5 Cast the briquets immediately after completely mix-ing the mortar, half fill the molds and puddle the mortaruniformly with the tamper, taking care not to displace thedivider. Slightly over fill the molds with additional mortar andrepeat the puddlin
44、g. After the mortar has set, cut off the excessto a plane surface flush with the top of the mold, using a broadknife or similar implement.12.3.6 Immediately after molding, place the molds, on thebase plate, into the moist cabinet for 48 h.12.3.7 Remove the briquets from the mold and store them atroo
45、m temperature and humidity for not less than 48 h.NOTE 11 in. = 25.4 mm.FIG. 2 Briquet Specimen for Tensile Strength TestC93206312.3.8 Examine the specimens, discard any that have airholes or excessively rough surfaces.12.3.9 Saw the specimens in half at the mid-point of thewaist line, aligning the
46、saw blade so that the entire saw kerf istaken out of one side of the briquet, and the remaining sidemaintains a 1 in. cross section. Discard the smaller portion ofthe briquet.12.4 Procedure:12.4.1 Thoroughly clean dust and loose particles from theflat waist surface of the specimen. Apply the bonding
47、 com-pound, in accordance with the producers directions, to the flatwaist surface of the briquet by means of a paint brush.12.4.2 Place the half briquet, coated with bonding com-pound, into the mold. Fill the remaining space in the mold withmortar, mixed and molded as specified in 12.3.12.4.3 The ti
48、me between coating the briquet with compoundand casting the mortar against it shall be immediately after thecompound has dried, or as recommended by the manufacturer,except when otherwise specified for a ten day waiting period.12.4.4 Place the filled briquet mold in the moist cabinet for24 h, then r
49、emove the briquets from the molds.12.5 Test Method:12.5.1 Test the briquets at the following intervals:12.5.1.1 Dry ConditionAir cure three briquets for 14 daysand test.12.5.1.2 Wet ConditionAir cure three briquets for 7 days,soak in water for 7 days, and test.12.5.2 Remove any loose particles or flash from the surfacesthat will be in contact with the clips of the testing machine.Make sure the bearing surfaces of the clips are clean and freeof sand, and the roller bearings are lubricated and maintainedto ensure freedom
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