VA 07 92 00-2011 JOINT SEALANTS.pdf

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1、12-11 07 92 00 - 1 SECTION 07 92 00 JOINT SEALANTS SPEC WRITER NOTE: Delete between /_/ if not applicable to project. Coordination with drawings: 1. Use term “sealants“ for all joints scheduled to receive sealants under PART 3. 2. Use term “caulking“ for all joints scheduled to receive caulking unde

2、r PART 3. 3. Do not use terms synonymously. General Design Criteria: 1. Use sealants in joints where movement over 8 percent is expected. 2. Use caulking on interior joints where no movement over 8 percent occurs, no water is expected, and no fire rating is required. 3. See SEALANTS: The Professiona

3、ls Guide (Sealant, Waterproofing are compatible with joint substrates, sealants, primers, and other joint fillers; and are approved for applications indicated by sealant manufacturer based on field experience and laboratory testing. B. Cylindrical Sealant Backings: ASTM C1330, of type indicated belo

4、w and of size and density to control sealant depth and otherwise contribute to producing optimum sealant performance: 1. Type C: Closed-cell material with a surface skin. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-12-11 07 92 00 - 8 C. Elastomer

5、ic Tubing Sealant Backings: Neoprene, butyl, EPDM, or silicone tubing complying with ASTM D1056, nonabsorbent to water and gas, and capable of remaining resilient at temperatures down to minus 32 C (minus 26 F). Provide products with low compression set and of size and shape to provide a secondary s

6、eal, to control sealant depth, and otherwise contribute to optimum sealant performance. D. Bond-Breaker Tape: Polyethylene tape or other plastic tape recommended by sealant manufacturer for preventing sealant from adhering to rigid, inflexible joint-filler materials or joint surfaces at back of join

7、t where such adhesion would result in sealant failure. Provide self-adhesive tape where applicable. 2.5 FILLER: A. Mineral fiber board: ASTM C612, Class 1. B. Thickness same as joint width. C. Depth to fill void completely behind back-up rod. 2.6 PRIMER: A. As recommended by manufacturer of caulking

8、 or sealant material. B. Stain free type. 2.7 CLEANERS-NON POUROUS SURFACES: Chemical cleaners acceptable to manufacturer of sealants and sealant backing material, free of oily residues and other substances capable of staining or harming joint substrates and adjacent non-porous surfaces and formulat

9、ed to promote adhesion of sealant and substrates. PART 3 - EXECUTION 3.1 INSPECTION: A. Inspect substrate surface for bond breaker contamination and unsound materials at adherent faces of sealant. B. Coordinate for repair and resolution of unsound substrate materials. C. Inspect for uniform joint wi

10、dths and that dimensions are within tolerance established by sealant manufacturer. 3.2 PREPARATIONS: A. Prepare joints in accordance with manufacturers instructions and SWRI. B. Clean surfaces of joint to receive caulking or sealants leaving joint dry to the touch, free from frost, moisture, grease,

11、 oil, wax, lacquer paint, or other foreign matter that would tend to destroy or impair adhesion. 1. Clean porous joint substrate surfaces by brushing, grinding, blast cleaning, mechanical abrading, or a combination of these methods to Provided by IHSNot for ResaleNo reproduction or networking permit

12、ted without license from IHS-,-,-12-11 07 92 00 - 9 produce a clean, sound substrate capable of developing optimum bond with joint sealants. 2. Remove loose particles remaining from above cleaning operations by vacuuming or blowing out joints with oil-free compressed air. Porous joint surfaces inclu

13、de the following: a. Concrete. b. Masonry. c. Unglazed surfaces of ceramic tile. 3. Remove laitance and form-release agents from concrete. 4. Clean nonporous surfaces with chemical cleaners or other means that do not stain, harm substrates, or leave residues capable of interfering with adhesion of j

14、oint sealants. a. Metal. b. Glass. c. Porcelain enamel. d. Glazed surfaces of ceramic tile. C. Do not cut or damage joint edges. D. Apply masking tape to face of surfaces adjacent to joints before applying primers, caulking, or sealing compounds. 1. Do not leave gaps between ends of sealant backings

15、. 2. Do not stretch, twist, puncture, or tear sealant backings. 3. Remove absorbent sealant backings that have become wet before sealant application and replace them with dry materials. E. Apply primer to sides of joints wherever required by compound manufacturers printed instructions. 1. Apply prim

16、er prior to installation of back-up rod or bond breaker tape. 2. Use brush or other approved means that will reach all parts of joints. F. Take all necessary steps to prevent three sided adhesion of sealants. 3.3 BACKING INSTALLATION: A. Install back-up material, to form joints enclosed on three sid

17、es as required for specified depth of sealant. B. Where deep joints occur, install filler to fill space behind the back-up rod and position the rod at proper depth. C. Cut fillers installed by others to proper depth for installation of back-up rod and sealants. Provided by IHSNot for ResaleNo reprod

18、uction or networking permitted without license from IHS-,-,-12-11 07 92 00 - 10 D. Install back-up rod, without puncturing the material, to a uniform depth, within plus or minus 3 mm (1/8 inch) for sealant depths specified. E. Where space for back-up rod does not exist, install bond breaker tape str

19、ip at bottom (or back) of joint so sealant bonds only to two opposing surfaces. F. Take all necessary steps to prevent three sided adhesion of sealants. SPEC WRITER NOTE: Detail joints correctly for symmetry of sealant installation. Do not use incorrect details. See ASTM C1193. 3.4 SEALANT DEPTHS AN

20、D GEOMETRY: A. At widths up to 6 mm (1/4 inch), sealant depth equal to width. B. At widths over 6 mm (1/4 inch), sealant depth 1/2 of width up to 13 mm (1/2 inch) maximum depth at center of joint with sealant thickness at center of joint approximately 1/2 of depth at adhesion surface. 3.5 INSTALLATI

21、ON: A. General: 1. Apply sealants and caulking only when ambient temperature is between 5 C and 38 C (40 and 100 F). 2. Do not use polysulfide base sealants where sealant may be exposed to fumes from bituminous materials, or where water vapor in continuous contact with cementitious materials may be

22、present. 3. Do not use sealant type listed by manufacture as not suitable for use in locations specified. 4. Apply caulking and sealing compound in accordance with manufacturers printed instructions. 5. Avoid dropping or smearing compound on adjacent surfaces. 6. Fill joints solidly with compound an

23、d finish compound smooth. 7. Tool joints to concave surface unless shown or specified otherwise. 8. Finish paving or floor joints flush unless joint is otherwise detailed. 9. Apply compounds with nozzle size to fit joint width. 10. Test sealants for compatibility with each other and substrate. Use o

24、nly compatible sealant. B. For application of sealants, follow requirements of ASTM C1193 unless specified otherwise. C. Where gypsum board partitions are of sound rated, fire rated, or smoke barrier construction, follow requirements of ASTM C919 only to seal all Provided by IHSNot for ResaleNo repr

25、oduction or networking permitted without license from IHS-,-,-12-11 07 92 00 - 11 cut-outs and intersections with the adjoining construction unless specified otherwise. 1. Apply a 6 mm (1/4 inch) minimum bead of sealant each side of runners (tracks), including those used at partition intersections w

26、ith dissimilar wall construction. 2. Coordinate with application of gypsum board to install sealant immediately prior to application of gypsum board. 3. Partition intersections: Seal edges of face layer of gypsum board abutting intersecting partitions, before taping and finishing or application of v

27、eneer plaster-joint reinforcing. 4. Openings: Apply a 6 mm (1/4 inch) bead of sealant around all cut-outs to seal openings of electrical boxes, ducts, pipes and similar penetrations. To seal electrical boxes, seal sides and backs. 5. Control Joints: Before control joints are installed, apply sealant

28、 in back of control joint to reduce flanking path for sound through control joint. 3.6 FIELD QUALITY CONTROL: SPEC WRITER NOTE: Revise and edit this article to suit sealant requirements of project. A. / Field-Adhesion Testing: Field-test joint-sealant adhesion to joint substrates as recommended by s

29、ealant manufacturer: 1. Extent of Testing: Test completed elastomeric sealant joints as follows: a. Perform 10 tests for first 300 m (1000 feet) of joint length for each type of elastomeric sealant and joint substrate. b. Perform one test for each 300 m (1000 feet) of joint length thereafter or one

30、test per each floor per elevation. / B. / Inspect joints for complete fill, for absence of voids, and for joint configuration complying with specified requirements. Record results in a field adhesion test log. / C. / Inspect tested joints and report on following: 1. Whether sealants in joints connec

31、ted to pulled-out portion failed to adhere to joint substrates or tore cohesively. Include data on pull distance used to test each type of product and joint substrate. 2. Compare these results to determine if adhesion passes sealant manufacturers field-adhesion hand-pull test criteria. 3. Whether se

32、alants filled joint cavities and are free from voids. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-12-11 07 92 00 - 12 4. Whether sealant dimensions and configurations comply with specified requirements./ D. / Record test results in a field adhesi

33、on test log. Include dates when sealants were installed, names of persons who installed sealants, test dates, test locations, whether joints were primed, adhesion results and percent elongations, sealant fill, sealant configuration, and sealant dimensions. / E. /Repair sealants pulled from test area

34、 by applying new sealants following same procedures used to originally seal joints. Ensure that original sealant surfaces are clean and new sealant contacts original sealant. / F. /Evaluation of Field-Test Results: Sealants not evidencing adhesive failure from testing or noncompliance with other ind

35、icated requirements, will be considered satisfactory. Remove sealants that fail to adhere to joint substrates during testing or to comply with other requirements. Retest failed applications until test results prove sealants comply with indicated requirements. / 3.7 CLEANING: A. Fresh compound accide

36、ntally smeared on adjoining surfaces: Scrape off immediately and rub clean with a solvent as recommended by the caulking or sealant manufacturer. B. After filling and finishing joints, remove masking tape. C. Leave adjacent surfaces in a clean and unstained condition. SPEC WRITER NOTES: 1. Clearly s

37、how all joints to receive SEALANTS AND CAULKING locations on the Drawing. 2. Review following selections and delete those not part of Project. 3.8 LOCATIONS: A. Exterior Building Joints, Horizontal and Vertical: 1. Metal to Metal: Type S-1, S-2 2. Metal to Masonry or Stone: Type S-1 3. Masonry to Ma

38、sonry or Stone: Type S-1 4. Stone to Stone: Type S-1 5. Cast Stone to Cast Stone: Type S-1 6. Threshold Setting Bed: Type S-1, S-3, S-4 7. Masonry Expansion and Control Joints: Type S-6 8. Wood to Masonry: Type S-1 Provided by IHSNot for ResaleNo reproduction or networking permitted without license

39、from IHS-,-,-12-11 07 92 00 - 13 B. Metal Reglets and Flashings: 1. Flashings to Wall: Type S-6 2. Metal to Metal: Type S-6 C. Sanitary Joints: 1. Walls to Plumbing Fixtures: Type S-9 2. Counter Tops to Walls: Type S-9 3. Pipe Penetrations: Type S-9 SPEC WRITER NOTES: 1. Use S-11, Shore A hardness o

40、f between 35 and 50 for minimal movement joints. (for normal use). 2. Use S-12, Shore A hardness of between 25 and 30 for joints requiring or greater movement range of plus or minus 50 percent. List spaces where required. 3. Use S-3, Shore A hardness between 15 and 25, for joints not in direct traff

41、ic patterns, such as adjacent to walls or columns, where greater movement is expected. List spaces and locations where required. D. Horizontal Traffic Joints: 1. Concrete Paving, Unit Pavers: Type S-11 or S-12 2. Garage/Parking Decks: Type S-10 E. High Temperature Joints over 204 degrees C (400 degr

42、ees F): 1. Exhaust Pipes, Flues, Breech Stacks: Type S-7 or S-8 F. Interior Caulking: 1. Typical Narrow Joint 6 mm, (1/4 inch) or less at Walls and Adjacent Components: Types C-1 and C-2. 2. Perimeter of Doors, Windows, Access Panels which Adjoin Concrete or Masonry Surfaces: Types C-1 and C-2. 3. J

43、oints at Masonry Walls and Columns, Piers, Concrete Walls or Exterior Walls: Types C-1 and C-2. 4. Perimeter of Lead Faced Control Windows and Plaster or Gypsum Wallboard Walls: Types C-1 and C-2. 5. Exposed Isolation Joints at Top of Full Height Walls: Types C-1 and C-2. 6. Exposed Acoustical Joint at Sound Rated Partitions Type C-2. 7. Concealed Acoustic Sealant Types S-4, C-1 and C-2. - - - E N D - - - Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-