1、*USACE / NAVFAC / AFCESA / NASA UFGS-03 52 16 (April 2008)-Preparing Activity: USACE SupersedingUFGS-03 51 00 (October 2007)UNIFIED FACILITIES GUIDE SPECIFICATIONSReferences are in agreement with UMRL dated October 2007*SECTION TABLE OF CONTENTSDIVISION 03 - CONCRETESECTION 03 52 16LIGHTWEIGHT INSUL
2、ATING CONCRETE04/08PART 1 GENERAL1.1 REFERENCES1.2 DESIGN REQUIREMENTS1.2.1 Concrete1.2.2 Required U-Value1.2.3 Steel Forms1.3 SUBMITTALSPART 2 PRODUCTS2.1 MATERIALS2.1.1 Admixtures2.1.2 Aggregate2.1.3 Foaming Agent2.1.4 Cementitious Material2.1.5 Wire Reinforcement2.1.6 Steel Forms2.1.7 Rigid Insul
3、ation2.1.8 Expansion Joint Materials2.2 MIXING PROCEDUREPART 3 EXECUTION3.1 FORMWORK3.2 WIRE REINFORCEMENT3.3 LOW DENSITY CONCRETE CONVEYING AND PLACEMENT3.4 EXPANSION JOINTS3.5 COLD WEATHER PLACEMENT3.6 CURING3.7 FIELD-CONTROL TESTS3.7.1 Wet-Density Tests3.7.2 Compressive Strength Tests3.8 CLEANING
4、 AND PROTECTION- End of Section Table of Contents -SECTION 03 52 16 Page 1Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SECTION 03 52 16 Page 2Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-*USACE
5、/ NAVFAC / AFCESA / NASA UFGS-03 52 16 (April 2008)-Preparing Activity: USACE SupersedingUFGS-03 51 00 (October 2007)UNIFIED FACILITIES GUIDE SPECIFICATIONSReferences are in agreement with UMRL dated October 2007*SECTION 03 52 16LIGHTWEIGHT INSULATING CONCRETE04/08*NOTE: This guide specification cov
6、ers the requirements for low density cast-in-place concrete roof decking.Edit this guide specification for project specific requirements by adding, deleting, or revising text. For bracketed items, choose applicable items(s) or insert appropriate information.Remove information and requirements not re
7、quired in respective project, whether or not brackets are present.Comments and suggestions on this guide specification are welcome and should be directed to the technical proponent of the specification. A listing of technical proponents, including their organization designation and telephone number,
8、 is on the Internet.Recommended changes to a UFGS should be submitted as a Criteria Change Request (CCR).*PART 1 GENERAL1.1 REFERENCES*NOTE: This paragraph is used to list the publications cited in the text of the guide specification. The publications are referred to in the text by basic designation
9、 only and listed in this paragraph by organization, designation, date, and title.Use the Reference Wizards Check Reference feature when you add a RID outside of the Sections Reference Article to automatically place the reference in the Reference Article. Also use the Reference Wizards Check Referenc
10、e feature to update SECTION 03 52 16 Page 3Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-the issue dates.References not used in the text will automatically be deleted from this section of the project specification when you choose to reconcile refer
11、ences in the publish print process.*The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.AMERICAN IRON AND STEEL INSTITUTE (AISI)AISI SG03-3 (2002) Cold-Formed Steel Design Manual SetA
12、MERICAN SOCIETY OF HEATING, REFRIGERATING AND AIR-CONDITIONING ENGINEERS (ASHRAE)ASHRAE FUN IP (2005) Fundamentals Handbook, I-P EditionASHRAE FUN SI (2005) Fundamentals Handbook, SI EditionAMERICAN WELDING SOCIETY (AWS)AWS A2.4 (2007) Standard Symbols for Welding, Brazing and Nondestructive Examina
13、tionASTM INTERNATIONAL (ASTM)ASTM A 185/A 185M (2007) Standard Specification for Steel Welded Wire Reinforcement, Plain, for ConcreteASTM A 653/A 653M (2007) Standard Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip ProcessASTM A 82/A 82
14、M (2007) Standard Specification for Steel Wire, Plain, for Concrete ReinforcementASTM C 150 (2007) Standard Specification for Portland CementASTM C 260 (2006) Standard Specification for Air-Entraining Admixtures for ConcreteASTM C 332 (2007) Lightweight Aggregates for Insulating ConcreteASTM C 495 (
15、2007) Compressive Strength of Lightweight Insulating ConcreteASTM C 578 (2007) Standard Specification for Rigid, Cellular Polystyrene Thermal InsulationASTM C 595 (2007) Standard Specification for Blended Hydraulic CementsSECTION 03 52 16 Page 4Provided by IHSNot for ResaleNo reproduction or network
16、ing permitted without license from IHS-,-,-ASTM C 796 (2004) Foaming Agents for Use in Producing Cellular Concrete Using Preformed FoamASTM C 869 (1991; R 2006) Foaming Agents Used in Making Preformed Foam for Cellular Concrete1.2 DESIGN REQUIREMENTSProvide services of a firm experienced in the inst
17、allation of cast-in-place low density roof systems. A representative of the firm shall supervise the mixing, transporting, placing, finishing, and testing the low density concrete.1.2.1 Concrete*NOTE: Oven-dry unit weight of low density concrete should not exceed 800 kg/cubic meter (50 pcf); nor sho
18、uld the compressive strength exceed 3100 kPa (450 psi). Insulation value decreases with high unit weights. Unit weight of 400 kg/cubic meter (25 pcf) with a minimum compressive strength of 862 kPa (125 psi) will normally be specified. Manufacture of this type of concrete is specialized and manufactu
19、rers data should be relied on to establish mixture proportions. See ACI 523.1R for additional information.*Establish the strength qualities of the low density concrete proposed for use from manufacturers submitted data prior to the beginning of construction operations. Perform the preparation of the
20、 design mix and subsequent testing through an approved testing laboratory capable of performing such services or, if approved, by the manufacturer of the low density concrete. Prepare trial design batches with the same materials proposed for use in the work. Make and test Test Cylinders in accordanc
21、e with ASTM C 495 for perlite and vermiculite concrete and ASTM C 796 for cellular concrete. Proportion low density concrete for a minimum oven-dry unit weight of 400 _ kg/cubic meter 25 _ pcf and the minimum average compressive strengths at 28 days of 862 _ kPa 125 _ psi.1.2.2 Required U-ValueThe a
22、ctual average installed thickness of concrete, forms, and insulation, if used, shall be sufficient to provide a coefficient of heat transmission, or U-value, based on winter conditions, through the affected construction, not in excess of _ W per square meter, per degree K Btu per hour, per square fo
23、ot, per degree F temperature difference, when determined in accordance with recognized methods set forth in the ASHRAE FUN SI ASHRAE FUN IP. Determine the U-value from inside air to outside air.1.2.3 Steel FormsDesign of steel forms shall conform to AISI SG03-3. Design units for attachment to the st
24、ructural supports by welding or by a special system of clips as recommended by the manufacturer. The deflection of the steel forms under the design live load indicated shall not exceed 1/240 of the SECTION 03 52 16 Page 5Provided by IHSNot for ResaleNo reproduction or networking permitted without li
25、cense from IHS-,-,-clear span.1.3 SUBMITTALS*NOTE: Review submittal description (SD) definitions in Section 01 33 00 SUBMITTAL PROCEDURES and edit the following list to reflect only the submittals required for the project. Submittals should be kept to the minimum required for adequate quality contro
26、l.A “G” following a submittal item indicates that the submittal requires Government approval. Some submittals are already marked with a “G”. Only delete an existing “G” if the submittal item is not complex and can be reviewed through the Contractors Quality Control system. Only add a “G” if the subm
27、ittal is sufficiently important or complex in context of the project.For submittals requiring Government approval on Army projects, a code of up to three characters within the submittal tags may be used following the “G“ designation to indicate the approving authority. Codes for Army projects using
28、the Resident Management System (RMS) are: “AE“ for Architect-Engineer; “DO“ for District Office (Engineering Division or other organization in the District Office); “AO“ for Area Office; “RO“ for Resident Office; and “PO“ for Project Office. Codes following the “G“ typically are not used for Navy, A
29、ir Force, and NASA projects.Choose the first bracketed item for Navy, Air Force and NASA projects, or choose the second bracketed item for Army projects.*Government approval is required for submittals with a “G“ designation; submittals not having a “G“ designation are for Contractor Quality Control
30、approval.information only. When used, a designation following the “G“ designation identifies the office that will review the submittal for the Government. Submit the following in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:SD-02 Shop DrawingsLow Density Roof Systems; G; G, _Drawings indica
31、ting shop and erection details for form systems proposed to be used. Show on the drawings cuts, vent holes, cut-outs for other trades, connections, and welds. Indicate welds in accordance with AWS A2.4.SD-06 Test ReportsDesign MixCertified copies of the design mix report for low density SECTION 03 5
32、2 16 Page 6Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-concrete indicating mixture proportions, average compressive strength in MPa psi, and wet unit weight at point of placement for the type proposed for the project. Make allowances for any unit
33、 weight changes resulting from handling and placing methods.PART 2 PRODUCTS2.1 MATERIALS2.1.1 AdmixturesProvide air-entraining admixtures conforming to ASTM C 260. Do not use admixtures containing chloride ions.2.1.2 AggregateProvide light weight aggregate free of asbestos and conforming to ASTM C 3
34、32, Group I.2.1.3 Foaming AgentProvide foaming agents, for making cellular concrete, conforming to ASTM C 869.2.1.4 Cementitious MaterialProvide portland cement conforming to ASTM C 150, Type I, III; or ASTM C 595, Type IS.2.1.5 Wire ReinforcementProvide reinforcement consisting of either wire mesh
35、or welded wire fabric. Mesh shall be 50 mm 2 inch hexagonal, woven from 19 gauge 19 gauge steel wire and reinforced with 16 gauge 16 gauge longitudinal steel wire spaced on 75 mm 3 inch maximum centers. Wires forming common sides of mesh spaces that are adjacent to longitudinal wires shall be woven
36、around longitudinal wires. Wire shall be galvanized conforming to ASTM A 82/A 82M. Welded wire fabric shall conform to ASTM A 185/A 185M, galvanized, 12 gauge 12 gauge longitudinal wires spaced on 100 mm 4 inchmaximum centers with 14 gauge 14 gauge transverse wires spaced on 200 mm 8 inch maximum ce
37、nters.2.1.6 Steel FormsForms shall be galvanized corrugated steel conforming to ASTM A 653/A 653M, Grade A or E, with coating Class G 90. Provide forms with side lap venting clips, formed in side lap vents, or vent slots in the corrugation. Vent area shall be at least 700 square mm per square m 0.10
38、 square inch per square foot of roof deck area.2.1.7 Rigid InsulationProvide insulation conforming to ASTM C 578, Type as recommended by the manufacturer.2.1.8 Expansion Joint MaterialsExpansion joint material shall be compressible up to at least 50 percent under 172 kPa 25 psi of pressure. Material
39、 shall be weather resistant and compatible with the roofing system used.SECTION 03 52 16 Page 7Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-2.2 MIXING PROCEDUREMechanically mix concrete ingredients to produce low density concrete of uniform consis
40、tency and a wet unit weight at point of placement required to obtain the compressive strength specified. Mixing and transporting operation shall be in accordance with the low density concrete material manufacturers recommendation.PART 3 EXECUTION3.1 FORMWORKAttach forms to structural members by plug
41、 welding or special clips furnished by the manufacturer. Welding or the use of clips shall be in conformance with recommendations of the manufacturer. Sheets shall be placed with edge-corrugation lips pointing upward and shall be lapped not less than one full corrugation. End laps shall be located o
42、ver permanent supports and shall be a minimum of 50 mm 2 inches. Venting shall be as recommended by the manufacturer. Prior to placing low density concrete, areas of coating that have been damaged by welding or other operations shall have welding flux, spatter, and slag removed, shall be cleaned of
43、loose rust and other foreign matter by wire brushing, and then coated with zinc-rich paint.3.2 WIRE REINFORCEMENTUnroll and place wire reinforcement so that the long dimension is perpendicular with the corrugation in the steel forms. Location of reinforcement shall be approximately in the center of
44、the lower one-third of the slab in which it is placed; however, minimum cover for reinforcement shall be 19 mm 3/4 inch.3.3 LOW DENSITY CONCRETE CONVEYING AND PLACEMENTConveying of low density concrete from the mixer to place of deposit shall be by methods that will prevent segregation and loss of m
45、aterial. Equipment for conveying concrete shall be of such size and design to ensure uniform, continuous placement of concrete. Deposit and screed low density concrete in a continuous operation until the placing of a panel or section is completed. Do not use rodding, tamping, vibrating, or steel troweling. Use temporary runways during placement. The actual thickness of the roof system shall be that required to obtain the U-value specified; however, the minimum thickness of the top-most layer of low-density concrete sh
