1、Designation: C 877 08Standard Specification forExternal Sealing Bands for Concrete Pipe, Manholes, andPrecast Box Sections1This standard is issued under the fixed designation C 877; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, t
2、he year of 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 specification covers external sealing bands to beused in conjunction with concrete pipe as defined in
3、Terminol-ogy C 822 and conforming to Specifications C14, C76, C 412,C 478, C 506, C 507, C 655, C 985, C 1417, and C 1433.1.1.1 Type I, Rubber and Mastic Bands.1.1.2 Type II, Plastic Film and Mesh Reinforced MasticBands.1.1.3 Type III, Chemically-Bonded Adhesive Butyl Bands.1.2 This specification is
4、 the inch-pound companion toSpecification C 877M; therefore, no SI equivalents are pre-sented in the specification.NOTE 1This specification covers only the design and material of thesealing bands. Sealing bands covered by this specification are adequate,when properly installed, for external hydrosta
5、tic pressures up to 13 psi,(30 ft) without leakage. The amount of infiltration or exfiltration flow inan installed pipeline is dependent upon many factors other than the sealingbands; allowable quantities and suitable testing of the installed pipelineand system must be covered by other specification
6、s.2. Referenced Documents2.1 ASTM Standards:2A 167 Specification for Stainless and Heat-ResistingChromium-Nickel Steel Plate, Sheet, and StripC14 Specification for Nonreinforced Concrete Sewer,Storm Drain, and Culvert PipeC76 Specification for Reinforced Concrete Culvert, StormDrain, and Sewer PipeC
7、 412 Specification for Concrete Drain TileC 478 Specification for Precast Reinforced Concrete Man-hole SectionsC 506 Specification for Reinforced Concrete Arch Culvert,Storm Drain, and Sewer PipeC 507 Specification for Reinforced Concrete Elliptical Cul-vert, Storm Drain, and Sewer PipeC 655 Specifi
8、cation for Reinforced Concrete D-Load Cul-vert, Storm Drain, and Sewer PipeC 681 Test Method for Volatility of Oil- and Resin-Based,Knife-Grade, Channel Glazing CompoundsC 766 Test Method for Adhesion after Impact of PreformedTape Sealants3C 822 Terminology Relating to Concrete Pipe and RelatedProdu
9、ctsC 985 Specification for Nonreinforced Concrete SpecifiedStrength Culvert, Storm Drain, and Sewer PipeC 1417 Specification for Manufacture of Reinforced Con-crete Sewer, Storm Drain, and Culvert Pipe for DirectDesignC 1433 Specification for Precast Reinforced ConcreteMonolithic Box Sections for Cu
10、lverts, Storm Drains, andSewersD36 Test Method for Softening Point of Bitumen (Ring-and-Ball Apparatus)D 217 Test Methods for Cone Penetration of LubricatingGreaseD 395 Test Methods for Rubber PropertyCompressionSetD 412 Test Methods for Vulcanized Rubber and Thermo-plastic ElastomersTensionD 471 Te
11、st Method for Rubber PropertyEffect of LiquidsD 570 Test Method for Water Absorption of PlasticsD 573 Test Method for RubberDeterioration in an AirOvenD 624 Test Method for Tear Strength of ConventionalVulcanized Rubber and Thermoplastic ElastomersD 882 Test Method for Tensile Properties of Thin Pla
12、sticSheetingD 1171 Test Method for Rubber DeteriorationSurfaceOzone Cracking Outdoors or Chamber (Triangular Speci-mens)D 1278 Test Methods for Rubber from Natural SourcesChemical AnalysisD 1682 Test Methods for Breaking Load and Elongation ofTextile Fabrics3D 1963 Test Method for Specific Gravity o
13、f Drying Oils,Varnishes, Resins, and Related Materials at 25/25C31This specification is under the jurisdiction of ASTM Committee C13 onConcrete Pipe and is the direct responsibility of Subcommittee C13.08 on Joints forPrecast Concrete Structures.Current edition approved July 1, 2008. Published Augus
14、t 2008. Originallyapproved in 1977. Last previous edition approved in 2002 as C 877 021.2For 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 Summa
15、ry page onthe ASTM website.3Withdrawn.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.D 2202 Test Method for Slump of SealantsD 2240 Test Method for Rubber PropertyDurometerHardnessD 3407 Test Methods for Joint Sealants, Hot-Poured,
16、forConcrete and Asphalt Pavements3D 3953 Specification for Strapping, Flat Steel and Seals3. Terminology3.1 DefinitionsFor definitions of terms relating to con-crete pipe, see Terminology C 822.4. Basis of Acceptance4.1 The acceptability of the sealing bands shall be deter-mined by the results of th
17、e physical tests prescribed in thisspecification, if and when required, and by inspection todetermine whether the sealing bands conform to this specifi-cation as to design and freedom from defects.5. Materials and Manufacture for Sealing Bands5.1 Type I, Rubber and Mastic Bands:5.1.1 Sealing bands s
18、hall be composed of rubber, mastic,and protective film elements as schematically shown in Fig. 1and with dimensions as required in the following:5.1.1.1 Length of Sealing BandFor a given pipe size, thelength of the sealing band as furnished shall be such that afterbeing stretched longitudinally 8 to
19、 12 % as part of theinstallation procedure, the sealing band will encircle theoutside perimeter of the pipe and overlap by an amount equalto, but not less than, the width of the sealing band. Sealingbands may be furnished in the required length or multiplesthereof.5.1.1.2 Width of Sealing BandThe wi
20、dth of the sealingband shall conform to the requirements of Table 1.5.1.2 Rubber ElementThe rubber element shall be ex-truded or molded from a high-grade rubber compound andshall be cured in such a manner that any cross section will bedense, homogeneous, and free of porosity, blisters, pitting, ando
21、ther imperfections. The basic polymer shall be natural,synthetic, or a blend of both and shall meet the physicalrequirements prescribed in Section 6. The rubber element shallhave ribs with a height of316 in., spaced34 to 114 in. apart,and have a thickness between the ribs of116 in. The thicknessof t
22、he ribs is not prohibited from varying from18 in. at thebase to132 in. at the top.5.1.3 Mastic ElementThe mastic element shall containrubber, reclaimed rubber and asphaltic derivatives, clay, and/orresin and shall meet the physical requirements prescribed inSection 6. The mastic element shall have a
23、 thickness of18 in.and be free of porous areas, air pockets, and contamination byforeign matter.5.1.4 Protective FilmThe protective film shall be watersoluble, have a 1-mil (0.001 in.) thickness, and meet thephysical requirements prescribed in Section 6.NOTE 2The function of the film is to protect t
24、he mastic surface priorto installation. It is intended to dissolve away in the presence of moistureduring installation and expose the mastic for sealing.5.2 Type II Plastic Film and Mesh Reinforced Mastic Bands:5.2.1 Sealing bands shall be composed of a plastic film,reinforced, rubberized, asphalt,
25、mastic coating with steel strapsas schematically shown in Fig. 2, with dimensions as requiredin the following:5.2.1.1 Length of Sealing Band for a Given Pipe SizeThelength of the sealing band shall be equal to the outsideperimeter of the joint plus 8 in. to provide for overlap.5.2.1.2 Width of Seali
26、ng BandThe width of the sealingband shall conform to the requirements of Table 1.5.2.2 Plastic Film ElementThe plastic film element shallbe an extended polymer which provides external reinforcementand shall meet the physical requirements prescribed in Section6.5.2.3 Mesh Reinforcement Element, The m
27、esh reinforce-ment shall consist of a woven plastic mesh and shall meet thephysical requirements prescribed in Section 6.5.2.4 Rubberized Asphalt Mastic ElementThe rubberized,asphalt, mastic element shall be a self adhering compositionand shall meet the requirements prescribed in Section 6.5.2.5 Tie
28、 Strap ElementThe tie strap element shall besteel straps with a minimum width of58 in. and a minimumthickness of 0.020 in. and shall conform to SpecificationD 3953. Steel straps shall be secured around the pipe withappropriate strapping tools as recommended by the sealingband manufacturer.5.2.6 Tie
29、Strap Sleeve ElementThe tie strap sleeve ele-ment shall consist of a minimum of 1 in. wide flat sleeve insidewhich the steel tie straps are not prohibited from sliding freely.The sleeve shall be made from woven or non-woven polypro-pylene fabric with nominal weight of 3.5 oz/yd2.FIG. 1 Sealing Band
30、Type I Schematic (Not to Scale)TABLE 1 Required Sealing Band WidthEquivalent Circular PipeDiameter, in.Sealing Band Width, in.18 to 33 736 to 78 984 to 108 11114 to 144 13FIG. 2 Sealing Band Type II (Not to Scale)C8770825.2.7 Release Sheet ElementThe disposable release sheetelement shall consist of
31、a silicone coated paper with aminimum basis weight of 50 lb/3000 ft2.5.3 Type III, Chemically-Bonded Adhesive Butyl Bands:Type A (Plastic backing band)Type B (Rubber backing band)A semi-liquid paintable butyl rubber-based adhesive primer5.3.1 Sealing bands shall be composed of a backing band,an appl
32、ied continuous butyl adhesive coating, and an optionalrelease element (as schematically shown in Fig. 3), with widthand overlap dimensions as required by 5.3.1.1 and 5.3.1.2.Purchaser specified clamping devices or tie straps are notprohibited to be used with these sealing bands.5.3.1.1 Length of Sea
33、ling Band for a Given Pipe SizeThelength of the sealing bands shall be equal to the outsideperimeter of the joint plus a minimum distance equal to twotimes the width of the material used to provide for overlap.This requirement shall allow the sealing bands to be appliedwithout stretching the product
34、 during application.5.3.1.2 Width of Sealing BandThe minimum width of thesealing band shall conform to the requirements of Table 2.5.3.2 Backing Band Element:5.3.2.1 Type A (Plastic Backing Band)The plastic backingband element shall be made from high density polyethyleneplastic conforming to the phy
35、sical requirements prescribed inSection 65.3.2.2 Type B (Rubber Backing Band)The rubber used inthe rubber backing band element shall conform to the physicalproperty requirements of Section 6.5.3.3 Butyl Rubber Adhesive ElementThe butyl rubberadhesive element, conforming to the physical requirementsp
36、rescribed in Section 6, shall be a self-adhering semi-solid andshall be applied evenly and homogeneously to the backingband with a minimum thickness of:Type A (Plastic backing band) 0.03 in.Type B (Rubber backing band) 0.03 in.5.3.4 Primer ElementThe primer element shall be asemi-liquid homogeneous
37、mixture of butyl rubber and vehicle,conforming to the physical requirements prescribed in Section6, and shall be spread in a continuous film at the intersection ofthe joint. The application width shall be sufficient to ensure thatthe entire band area will contact only primed surfaces.5.3.5 Optional
38、Tie Strap ElementThe optional tie strapelement shall be steel straps with a minimum width of58 in.and a minimum thickness of 0.20 in. and shall conform toSpecification D 3953. Steel straps shall be secured around thepipe with appropriate strapping tools as recommended by thesealing band manufacturer
39、.5.3.6 Optional Clamping DevicesOptional clamping de-vices shall be constructed of corrosion resistant materialsmeeting the physical properties and chemical compositionrequirements of Specification A 167.5.3.7 Optional Release ElementThe optional release ele-ment shall consist of coated paper or pla
40、stic that has demon-strated its suitability for this use.6. Requirements6.1 Type I, Rubber and Mastic Bands:6.1.1 The rubber element shall have the following physicalproperties when tested in accordance with 8.1.1:Tensile strength, min, psi 1200Elongation at break, min, % 300Shore durometer hardness
41、:min 60max 70Compression set, max, % of deflection 25Accelerated aging:Decrease in tensile strength, max, % oforiginal15Decrease in elongation, max, % of original 20Water absorption by weight, max, % 10Ozone resistance rating 06.1.2 The mastic element shall be capable of flowing, withinthe confines
42、of the sealing band, to fill joint surface imperfec-tions against which the sealing band is placed and shall have nodeleterious effect on the rubber element. The mastic elementFIG. 3 Sealing Band Type III (Not to Scale)TABLE 2 Required Sealing Band Width (Type III)EquivalentCircular PipeDiameter, in
43、.MinimumSealing BandWidth, in.EquivalentCircularManholeDiameter, in.MinimumSealing BandWidth, in.12 to 33 6 . .36 to 78 9 . .84 and larger 12 . . . 24 to 120 6C877083shall have the following physical properties when tested inaccordance with 8.1.2:Minimum MaximumAsh-inert matter 10 % 25 %Volatiles 5
44、% 10 %Specific gravity 1.20 1.35Slump 0.01 in. 0.03 in.Penetration 200 3006.1.3 The protective film element shall have a maximumwater solubility of 60 s/0.8 mil of thickness when tested inaccordance with Section 8.6.2 Type II Plastic Film and Mesh Reinforced Mastic Bands:6.2.1 The plastic film eleme
45、nt shall have the followingphysical properties when tested in accordance with 8.2.1:Tensile strength, min, psi 4000Elongation at break, min, % 100Tear resistance, min, psi 1500Water absorption, max, % 0.016.2.2 The reinforcing mesh element shall have the followingphysical properties when tested in a
46、ccordance with 8.2.2:Tensile Strength, min, lb/in.warp 75fill 75Elongation at break, min, %warp 20fill 206.2.3 The rubberized asphalt mastic layer shall have thefollowing physical properties when tested in accordance with8.2.3:Minimum MaximumAsh-inert matter, % 8.0 15.0Volatiles, % 0.1 2.0Specific g
47、ravity 0.95 1.05Softening temperature, min., F 175 Penetration, dmm 60 90Flow, mm 10 106.3 Type III, Chemically-Bonded Adhesive Butyl Bands:6.3.1 The backing band element shall have the followingphysical properties when tested in accordance with 8.3.1(plastic) and 8.3.2 (rubber):Type A (Plastic Back
48、ing Band)Tensile strength, min, psi 4000Elongation at break, min,% 100Tear resistance, min, psi 1500Water absorption, max, % 0.01Type B (Rubber Backing Band)Tensile strength, min, psi 1200Elongation at break, min, % 300Shore durometer hardness:min 60max 70Compression set, max, % of deflection 25Acce
49、lerated aging:Decrease in tensile strength, max, % oforiginal15Decrease in elongation, max, % of original 20Water absorption by weight, max, % 10Ozone resistance rating 06.3.2 The butyl rubber adhesive element shall have thefollowing physical properties when tested in accordance with8.3.3:Minimum MaximumAsh-inert matter, % 30 50Volatiles, % 0.1 2Specific gravity 1.15 1.50Adhesion after impact, % 50 100Penetration at 77F 50 1007. Permissible Variations in Dimensions7.1 Type I, Rubber and Mastic Bands:7.1.1 The thickness of the rubber elem
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