VA 03 52 00-2011 LIGHTWEIGHT CONCRETE ROOF INSULATION.pdf

1、09-11 03 52 00 - 1 SECTION 03 52 00 LIGHTWEIGHT CONCRETE ROOF INSULATION SPEC WRITER NOTES: 1. Delete between /_/ if not applicable to the project. Also delete any other item or paragraph not applicable in this section and renumber the Articles and paragraphs. 2. Vent insulating concrete placed on s

2、teel deck at underside through slotted holes formed in metal deck, combined with topside edge venting and roof relief vents unless ASHRAE recommends no topside roof venting. 3. Vent insulating concrete placed over cast-in-place concrete or precast concrete substrates, through topside roof relief ven

3、ts combined with edge venting unless ASHRAE recommends no roof venting. 4. For Gulf Coast areas check for non- venting in ASHRAE criteria. 5. Use this section for roof decks and interstitial decks. Slabs. 6. Use cellular insulating concrete for adhesively applied single ply roofing. 7. Define as “In

4、sulating Concrete“ on drawings. Do not use term “Light Weight Insulating Concrete“. 8. Allow options specified except for adhered roof membrane; use cellular concrete. 9. Use section with options as written and with Section 03 51 16, GYPSUM CONCRETE ROOF DECKS, Section 03 55 11, GYPSUM CONCRETE FLOO

5、R DECKS. 10. Delete in par.1.2 item or paragraph not applicable in this section. 11. Coordinate with Section 05 12 00, STRUCTURAL STEEL FRAMING, and Section 05 31 00, STEEL DECKING. PART 1 - GENERAL 1.1 DESCRIPTION Section specifies insulating concrete placed on a prepared structural deck / and / in

6、tegral insulating board composite construction /. 1.2 RELATED WORK A. Insulating concrete for interstitial decks: Section 03 55 11, GYPSUM CONCRETE FLOOR DECKS B. Roof decks: Section 03 51 16, GYPSUM CONCRETE ROOF DECKS. 1.3 SUBMITTALS A. Submit in accordance with Section 01 33 23, SHOP DRAWINGS, PR

7、ODUCT DATA AND SAMPLES. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-09-11 03 52 00 - 2 B. Manufacturers Literature and Data: 1. Description of material. 2. Specifications for mixing, placing, curing and protection of insulating concrete. 3. Inter

8、stitial deck: Test specimens reports. C. Certificates: Aggregate or foam manufacturers written certification that applicator has equipment and training to provide a satisfactory installation. 1.4 DELIVERY, STORAGE AND HANDLING A. Deliver and store packaged materials in original containers with seals

9、 unbroken and labels intact. B. Store in dry and watertight facilities. Do not store materials on ground. SPEC WRITER NOTE: Update the applicable publications at the time of the project specification preparation. 1.5 APPLICABLE PUBLICATIONS A. Publications listed below form a part of this specificat

10、ion to extent referenced. Publications are referenced in text by basic designation only. B. American Concrete Institute (ACI): 305R-10 Hot Weather Concreting 306R-10 Cold Weather Concreting 308R-01(R2008) . Curing Concrete 523.1R-06 Guide for Cast-in-Place Low-Density Concrete C. American Society fo

11、r Testing and Materials (ASTM): A82-07 . Steel Wire, Plain, for Concrete Reinforcement A185-07 Steel Welded Wire Fabric, Plain, for Concrete Reinforcement C150-09 Portland Cement C260-10 Air-Entraining Admixtures for Concrete C309-07 Liquid Membrane Forming Compounds for Curing Concrete C332-09 Ligh

12、tweight Aggregates for Insulating Concrete C495-07 Compressive Strength of Lightweight Insulating Concrete C578-10 Rigid Cellular Polystyrene Thermal Insulation C665-06 Mineral Fiber Blanket Thermal Insulation for Light Frame Construction and Manufactured Housing Provided by IHSNot for ResaleNo repr

13、oduction or networking permitted without license from IHS-,-,-09-11 03 52 00 - 3 C796-04 Foaming Agents For Use in Producing Cellular Concrete Using Preformed Foam C869-91(R2006) . Foaming Agents Used in Making Preformed Foam for Cellular Concrete PART 2 - PRODUCTS SPEC WRITER NOTE: Update material

14、requirements to agree with the applicable requirements (types, grades, classes) specified in the referenced Applicable Publications. 2.1 MATERIALS A. Portland cement: ASTM C150, Type I or Type III. B. Lightweight Aggregate: Vermiculite or Perlite conforming to ASTM C332, Group I. C. Foaming Agent: A

15、STM C869. D. Air-Entrainment Agent: 1. ASTM C260 type recommended by the aggregate manufacturer. 2. Admixtures with chloride salts or regenerated foam types not acceptable. E. Water: Clean and potable, free from impurities detrimental to the concrete. F. Insulation and Control Joint Filler: 1. Contr

16、ol Joint Filler: Glass fiber or similar vapor permeable highly compressible material which will compress to one-half its thickness under a load of 172 kPa (25 psi) or less. 2. Insulation: ASTM C665, unfaced for relief vents. SPEC WRITER NOTE: Use wire mesh reinforcing when roof deck slopes exceed 4

17、inches in 12 inches and for fire rated roof assemblies using metal decking and in seismic areas. 3. Insulation Board: a. Polystyrene: ASTM C578, Type I. b. Board with evenly distributed holes or slots for bonding; approximately 3 percent open area. G. Wire Mesh Reinforcing 1. Hexagonal Mesh: Fabrica

18、ted of ASTM A82, galvanized steel wire 0.9 mm (0.0359-inch) diameter twisted to form 50 mm (2-inch) hexagons with WO.5 galvanized steel wire woven into mesh spaced 200 mm (18-inches) apart. 2. Welded wire fabric: ASTM A185, 102 x 204 mm (4 by 8-inches) - W1.2/W05 - or 50 x 50 mm (2 by 2-inches) - W0

19、5/W0.5. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-09-11 03 52 00 - 4 H. Admixtures: 1. Air Entraining: ASTM C260, Type recommended by the aggregate manufacturer. Admixtures with chloride salts or pregenerated foam types are not acceptable for v

20、ermiculite or perlite concrete. 2. Accelerating, Retarding, and Water Reducing: ASTM C494, Type as recommended by insulating concrete manufacturer. I. Concrete Sealer: ASTM C309, Type 2, white, pigmented, curing, sealing, hardening and dustproofing concrete, and compatible with latex paint or acryli

21、c paint, not acting as a bond breaker for the paint. 2.2 MIXES AND MIXING Roof Deck A. Mix insulating concrete in accordance with ACI 523.1R or manufacturers printed specifications where more demanding. B. Place in accordance with chapter 5 of ACI 523.1R, or manufacturers specifications where more d

22、emanding. 1. Cold Weather Concreting: ACI 306R and ACI 523.1R. Remove and replace frozen concrete. 2. Hot Weather Concreting ACI 305R. 3. Place insulating concrete to not less than 90 mm (3-1/2 inches) over the top of the steel deck crests. 4. Smooth the placed material to a uniform finish following

23、 the screeding operation. 5. Free surface of loose material, finish smooth to receive sealer. C. Design Mix: 1. Compressive strength: Minimum 862 kPa (125 psi) when tested in accordance with ASTM C495 except do not oven dry cellular concrete samples. 2. Dry density: Maximum 450 Kg/cubic meter (28 pc

24、f). D. Vermiculite or Perlite aggregate mix. 1. Mix proportions as recommended by aggregate manufacturer for specified strength and density. 2. Approximate proportions: a. Ratio of 0.17 cubic meter (6 cubic feet) of aggregate to 42 Kg (94 pounds) of Portland cement. b. Air entraining agent approxima

25、tely 8 Kg (0.11 pound) per 95 L (25 gallons) of water. c. Slump approximately 70 mm (2.7 inches). d. Water to assure uniform and consistent mix. E. Cellular concrete mix: Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-09-11 03 52 00 - 5 1. Mix propo

26、rtions as recommended by foam manufacture for specified strength and cast density. 2. Preformed foam concentrate diluted at approximately 40 parts water to one part concentrate. Interstitial Deck A. Compressive Strength: Minimum 1550 kPa (225 psi). Test in accordance with ASTM C495. B. Dry density w

27、hen tested in accordance with ASTM C495. 600Kg/m3 (36 pcf). 450Kg/m3 (28 pcf). C. Vermiculite or Perlite aggregate mix. 1. Mix proportions as recommended by aggregate manufacturer for specified strength and density. 2. Approximate proportions: Ratio of 0.12 m3 (4 cubic feet) of aggregate to 42 Kg (9

28、4 pounds) of Portland cement with air entraining agent. D. Cellular concrete mix: UL design No.P902 for cellular concrete. PART 3 - EXECUTION 3.1 INSPECTION A. Clean deck of debris, oil, and other contaminants that will prevent bond. B. Do not start until curbs, sleeves, edge venting, or other penet

29、ration forms are completed. 3.2 PLACING INSULATING CONCRETE A. Place in accordance with ACI 523.1R or manufacturers specifications where more demanding. B. Cold Weather Concreting: ACI 306R. Remove and replace frozen concrete. C. Hot Weather Concreting: ACI 305R. D. Place reinforcement as required f

30、or fire rating and for seismic areas. 1. Lap the edges of the reinforcement 150 mm (6-inches) and the ends 150 mm (6-inches). 2. Locate at midheight of insulating concrete. 3. Place reinforcement without attachment approximately 13mm (1/2 inch) above steel deck crests in insulating concrete. E. Plac

31、e for thickness and profiles shown. F. Place concrete not less than 50 mm (2-inches), or more than 200 mm (8-inches) in thickness. G. Slope insulating concrete uniformly, 1 in 50 (1/4-inch per foot) minimum, to drains or scuppers. Provided by IHSNot for ResaleNo reproduction or networking permitted

32、without license from IHS-,-,-09-11 03 52 00 - 6 H. Depressions that create ponding are not acceptable. I. Leave surface free of loose material and finish to receive roofing material specified. J. Roof relief Vents for Vermiculite or Perlite Concrete: 1. Under roof relief vents, remove insulating con

33、crete to structural deck and fill with ASTM C665 insulating material. 2. Coordinate with roofing and sheet metal work to space vents minimum 152 mm (6-inches) in diameter, a maximum distance of 9 m (30 feet) from adjacent vent and from vented edge. K. Control Joints For Perlite Concrete: 1. Install

34、minimum 25 mm (1-inch) wide control joint through thickness of perlite concrete around perimeter of roof deck and at junction of roof penetrations. 2. Fill control joints with control joint filler specified. 3.3 PLACING INSULATION BOARD FOR COMPOSITE CONSTRUCTION A. Coat concrete roof deck with a sl

35、urry of the insulating concrete, minimum 3 mm (1/8-inch) thick. B. Fill the corrugations of metal decking with insulating concrete to a minimum depth of 3 mm (1/8-inch) over top of flutes. C. Set insulation boards to key into slurry. Install insulation in a stair stepped configuration to form base f

36、or slope-to-drain capability. D. Place for thickness and profiles shown. Thickness of concrete over insulation board not less than 2 inches. 3.4 CURING, PROTECTION AND TESTING A. Roof Deck: Cure in accordance with ACI 308R, or manufacturers specification where more demanding. B. Interstitial Deck: C

37、ure in accordance with ACI 523.1R or manufacturers specification where more demanding. C. Interstitial Deck: After curing for not less than 30 days, for vermiculite and perlite concrete, apply on e coat of sealer at approximate rate of 3m2/litre (125 square feet per gallon to insulating concrete in

38、accordance with sealer manufacturers specification. D. Do not permit traffic on insulating concrete for 72 hours after placing. /E. Testing: 1. Fasteners pull-out test for roofing: Resist a 14 kg (30 pound) pull-out when driven into cured insulating concrete. 2. Perform roof fastener pull-out test f

39、or each 160 square meters (10 squares) or not less than 3 tests whichever is greater. 3. Patch test pull out areas after fastener is removed. 4. Selection of test location and witness of tests by Resident Engineer/. Provided by IHSNot for ResaleNo reproduction or networking permitted without license

40、 from IHS-,-,-09-11 03 52 00 - 7 5. Take a minimum of 4 test specimens at the point of placement for 75 m3 cum (100 cubic yards) of material placed and each days pour. 6. Use 75 mm x 150 mm (3 inch by 6 inch) cylinders for specimens. 7. Test for compressive strength in accordance with ASTM C495 except do not oven dry cellular insulating concrete prior to compressive testing, see ASTM C796, Section 8.9. - - - E N D - - - Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-