SECTION 03521

INSULATING CONCRETE FILL

PART 1 GENERAL

SECTION INCLUDES

Insulating concrete fill over structural roof [deck] [slab].

Perimeter joint filler.

RELATED SECTIONS

Section [______-____________]:	Structural roof deck.

Section [03410 - Structural Precast Concrete] [03415 -Precast Concrete Hollow Core Planks]: Grouting of precast concrete roof framing members.

Section [______-____________]:	Wood blocking, curbs.

Section [______-____________]: [Vapor retardant,] insulation, and roof membrane.

****** [OR] ******

Section [______-____________]:	Roof membrane and insulation.

REFERENCES

ANSI/ASTM A185 - Welded Steel Wire Fabric for Concrete Reinforcement.

ANSI/ASTM C260 - Air Entraining Admixtures for Concrete.

ANSI/ASTM C332 - Lightweight Aggregates for Insulating Concrete.

ASTM C33 - Concrete Aggregates.

ASTM C150 - Portland Cement.

SUBMITTALS

Submit under provisions of Section [01300] [________].

Product Data: Provide physical characteristics, thermal values, product limitations and [________________].

Manufacturer's Installation Instructions: Indicate product installation criteria, environmental and curing requirements.

QUALIFICATIONS

Installer: Company specializing in placing lightweight concrete fill material specified in this Section with minimum [three] [_______] years [documented] experience [approved by manufacturer].

REGULATORY REQUIREMENTS

Conform to [applicable] [___________] code for combustibility requirements.

Conform to [UL] [FM] [Warnock-Hersey] Assembly Design No. [___________].

Provide certificate of compliance from [authority having jurisdiction [________________] indicating approval of fill materials in the required fire rated assembly.

PRE-INSTALLATION CONFERENCE

Convene [one] [_____] week prior to commencing work of this Section, under provisions of Section [01039] [________].

ENVIRONMENTAL REQUIREMENTS

Do not place fill mix at ambient temperatures lower than [40] [____] degrees F ([5] [____] degrees C) without heating mix water to [90 to 110] [________] degrees F ([32 to 43] [________] degrees C).

During low humidity conditions, sprinkle water over concrete surface to aid hydration and curing.

PART 2 EXECUTION

MANUFACTURERS

[__________________________________] Product [_________].

[__________________________________] Product [_________].

[__________________________________] Product [_________].

Substitutions: Under provisions of Section [01600] [________].

MATERIALS

Cement: ANSI/ASTM C150, Portland Type [I - Normal] [________], gray color.

Lightweight Aggregate: ANSI/ASTM C332; [Group I, [perlite] [vermiculite]] [Group II, slag, clay, diatomite, fly ash, shale, slate, or other processed natural materials].

Concrete Materials: ASTM C33 small aggregate and water.

Air Entrainment Agent: Type recommended by lightweight aggregate manufacturer.

ACCESSORIES

Reinforcement: [Hexagonal wire mesh, galvanized] [ANSI/ASTM A185, [___x___] inch ([___x___] mm) size, welded wire fabric, galvanized.]

Perimeter Joint Filler: Glass fiber strips, compressible to 50 percent original thickness under load of [25] [____] psi ([170] [____] kPa) with full recovery.

[Vents: Type recommended by lightweight aggregate manufacturer.]

CONCRETE MIX

Provide concrete mix to:

Compressive Wet Oven Dry Strength Density Density

psi kPa	lb/cu ft kg/cu m	lb/cu ft kg/cu m

[350 2 410	50 800 36 575]

[230 1 585	45 725 30 480]

[140 965	40	650 27 430]

[80	550	36	580	22	350]

Slump:	[____] inch ([____] mm).

PART 3 EXECUTION

EXAMINATION

Verify deck surface under provisions of Section [01039] [________].

Verify that deck surface is suitable to receive work of this Section.

Verify joints in [precast] [________] roof members are grouted or taped to prevent seepage of insulating concrete.

PREPARATION

Install vents in accordance with manufacturer's instructions to encourage drying of concrete.

Install [1] [____] inch ([25] [____] mm) thick expansion joint filler at:

Perimeter of roof decking,

Around penetrations through deck,

Every [100] [____] ft ([30] [____] m) of deck surface dimension,

[Each change of deck direction on metal roof deck surfaces.]

INSTALLATION

Place insulating concrete and screed surface to achieve [minimum] [maximum] [nominal] [2] [____] inch ([50] [____] mm) thickness.

[Slope top surface to [0.25] [____] inch/foot ([20] [____] mm/m) for roof surface drainage.]

****** [OR] ******

Slope concrete for roof surface drainage as indicated.

CURING

Air cure in accordance with light weight aggregate manufacturer's instructions.

Protect insulating concrete from excess evaporation of surface moisture.

FIELD QUALITY CONTROL

Field [inspection and] testing for dry density will be performed under provisions of Section [01400] [________].

Testing laboratory will take three test samples from each [75 or less] [____] cu yds ([75 or less] [____] cu m) of insulating concrete placed.

Testing laboratory will take one additional test sample during cold weather concreting.

END OF SECTION