S06 AMENDED Spec Section 03 52 00.pdf

Department of Veterans Affairs VA Project No. 650-19-100 Providence VA Medical Center Replace Boilers in Building 10 Providence, RI 100% Corrected Construction Documents: 07/12/2022

01-01-21

03 52 00 - 1

SECTION 03 52 00

LIGHTWEIGHT CONCRETE ROOF INSULATION

PART 1 - GENERAL

1.1 DESCRIPTION

A. This section specifies lightweight concrete placed on a prepared deck or existing lightweight concrete.

1.2 RELATED WORK

A. Section 07 01 50.19 - PREPARATION FOR RE-ROOFING

B. Section 07 22 00 - ROOF AND DECK INSULATION

C. Section 07 54 19 - POLYVINYL CHLORIDE (PVC) ROOFING

D. Section 07 71 00 - ROOF SPECIALTIES

E. Section 07 72 00 - ROOF ACCESSORIES

1.3 SUBMITTALS

A. Submit in accordance with Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA

AND SAMPLES. All items indicated below are required submittals requiring Contracting Officer’s Representative (COR) review and approval.

B. Manufacturer's Literature and Data:

1. Description of material.

2. Specifications for mixing, placing, curing and protection of insulating concrete.

3. Performance Requirements: Submit indicating compressive strength, oven dry, density (except at cellular insulating concrete), and coefficient of heat transmission.

C. Certificates:

1. Fabricator’s Compatibility Certificates.

2. Applicator’s Experience Certificates.

D. Test Reports: Submit certified test reports on laboratory testing of insulating concrete samples, taken at time of placement.

1.4 QUALITY ASSURANCE:

A. Approval by Contracting Officer Representative (COR) is required of products of proposed manufacturer or supplier.

B. Submit certificate from the insulating concrete fabricator certifying that materials for this project are chemically and physically compatible.

Providence, RI 100% Corrected Construction Documents: 07/12/2022

01-01-21

03 52 00 - 2

C. Submit certificate that the work will be performed by or under the supervision of personnel specializing in insulating concrete application and having not less than three (3) years’ experience.

1.5 DELIVERY, STORAGE AND HANDLING:

A. Deliver and store packaged materials in original containers with seals 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.

1.6 APPLICABLE PUBLICATIONS:

A. Publications listed below form a part of this specification to extent referenced. Publications are referenced in text by basic designation only.

B. American Concrete Institute (ACI):

305R-10.................Guide to Hot Weather Concreting

306R-16.................Guide to Cold Weather Concreting

308R-16.................Guide to Curing Concrete

523.1R-06...............Guide for Cast-in-Place Low-Density Concrete

C. ASTM International (ASTM):

A1064/A1064M-18a........Standard Specification for Carbon-Steel Wire and Welded Wire Reinforcement, Plain and

Deformed, for Concrete

C150/C150M-20...........Standard Specification for Portland Cement

C260/C260M-10a(2016)....Standard Specification for Air Entraining

Admixtures for Concrete

C309-19.................Standard Specification for Liquid Membrane

Forming Compounds for Curing Concrete

C332-17.................Standard Specification for Lightweight

Aggregates for Insulating Concrete

C494/C494M-19...........Standard Specification for Chemical Admixtures for Concrete

C495/C495M-12(2019).....Standard Test Method for Compressive Strength of Lightweight Insulating Concrete

C578-19.................Standard Specification for Rigid Cellular

Polystyrene Thermal Insulation

Providence, RI 100% Corrected Construction Documents: 07/12/2022

01-01-21

03 52 00 - 3

C665-17.................Standard Specification for Mineral Fiber

Blanket Thermal Insulation for Light Frame

Construction and Manufactured Housing

C796/C796M-19...........Standard Test method for Foaming Agents For Use in Producing Cellular Concrete Using Preformed

Foam

C869/C869M-11(2016).....Standard Specification for Foaming Agents Used in Making Preformed Foam for Cellular Concrete

PART 2 - PRODUCTS

2.1 MATERIALS:

A. Portland Cement: ASTM C150/C150M, Type I or Type III.

B. Lightweight Aggregate: Perlite conforming to ASTM C332, Group I.

C. Foaming Agent: ASTM C869/C869M.

D. Air-Entrainment Agent:

1. ASTM C260/C260M type recommended by the aggregate manufacturer.

2. Admixtures with chloride salts or regenerated foam types are not acceptable.

E. Water: Clean and potable, free from impurities detrimental to the concrete.

F. Insulation and Control Joint Filler:

1. Control 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.

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. Admixtures:

1. Accelerating, Retarding, and Water Reducing: ASTM C494/C494M, Type as recommended by insulating concrete manufacturer.

H. Concrete Sealer: ASTM C309, Type 2, white, pigmented, curing, sealing, hardening and dustproofing concrete, and compatible with latex paint or acrylic paint, not acting as a bond breaker for the paint.

2.2 MIXES AND MIXING:

A. Roof Deck

Providence, RI 100% Corrected Construction Documents: 07/12/2022

01-01-21

03 52 00 - 4

1. Mix insulating concrete in accordance with ACI 523.1R or manufacturer's printed specifications where more demanding.

2. Design Mix:

a. Compressive strength: Minimum 862 kPa (125 psi) when tested in accordance with ASTM C495 except do not oven dry cellular concrete samples.

b. Dry density: Maximum 450 Kg per cubic meter

(28 pounds per cubic foot).

3. Perlite aggregate mix.

a. Mix proportions as recommended by aggregate manufacturer for specified strength and density.

b. Approximate proportions:

1) Ratio of 0.17 cubic meter (6 cubic feet) of aggregate to 42 Kg

(94 pounds) of Portland cement.

2) Air entraining agent approximately 0.05 Kg (0.11 pound) per

95 L (25 gallons) of water.

3) Slump approximately 69 mm (2.7 inches).

4) Water to assure uniform and consistent mix.

4. Cellular concrete mix:

a. Mix proportions as recommended by foam manufacture for specified strength and cast density.

b. Preformed foam concentrate diluted at not more than 40 parts water to one (1) part concentrate.

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, and other penetration forms are completed.

3.2 PLACING INSULATING CONCRETE:

A. Place in accordance with ACI 523.1R or manufacturer's specifications where more demanding.

B. Cold Weather Concreting: ACI 306R and ACI 523.1R.

C. Remove and replace frozen concrete.

D. Hot Weather Concreting: ACI 305R.

E. Place reinforcement as required for fire rating and for seismic areas.

Providence, RI 100% Corrected Construction Documents: 07/12/2022

01-01-21

03 52 00 - 5

1. Lap the edges of the reinforcement 152 mm (6 inches) and the ends

150 mm (6 inches).

2. Locate at mid-height of insulating concrete. Provide minimum coverage of reinforcement as recommended by manufacturer.

3. Place reinforcement without attachment minimum 13 mm (1/2 inch) above steel deck crests in insulating concrete.

F. Place for thickness and profiles shown.

G. Place concrete not less than 50 mm (2 inches), or more than 203 mm

(8 inches) in thickness.

H. Slope insulating concrete uniformly, 1 in 50 (1/4-inch per foot) minimum, to drains or scuppers.

I. Depressions that create ponding are not acceptable.

J. Leave surface free of loose material and finish smooth to receive roofing material specified.

K. Control Joints for Perlite Concrete:

1. Install 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 slurry of insulating concrete, minimum

3 mm (1/8-inch) thick.

B. Fill 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 for slope-to-drain capability.

D. Place for thickness and profiles shown. Thickness of concrete over insulation board to be not less than 50 mm (2 inches).

3.4 CURING, PROTECTION AND TESTING:

A. Roof Deck: Cure in accordance with ACI 308R.

B. Do not permit traffic on insulating concrete for 72 hours after placing.

C. Testing:

1. Insulating Concrete Samples:

a. Take a minimum of four (4) test specimens at the point of placement for 76.5 cubic meters (100 cubic yards) of material placed and each days pour. Submit test reports.

Providence, RI 100% Corrected Construction Documents: 07/12/2022

01-01-21

03 52 00 - 6

b. Use 75 x 152 mm (3 x 6 inch) cylinders for specimens.

c. Test for compressive strength in accordance with ASTM C495/C495M, except do not oven dry cellular insulating concrete prior to compressive testing. See ASTM C796/C796M, Section 8.9.

- - - E N D - - -