SECTION 09440

PLASTIC MATRIX TERRAZZO

PART	GENERAL

SECTION INCLUDES

[Epoxy] [Polyacrylate/Portland cement] [Polyester] matrix terrazzo floor [and] [base] [and border].

[Stairs, landings, and stringers.]

Divider strips [and recessed [mat] [_____] frames].

PRODUCTS FURNISHED BUT NOT INSTALLED UNDER THIS SECTION

[Section [______-____________]: Installation of [perimeter edging.] [________].]

PRODUCTS INSTALLED BUT NOT FURNISHED UNDER THIS SECTION

[Section [______-____________]: Perimeter edging.]

Section [______-____________]: Recessed floor mat frames.

Section [______-____________]: Building [control] [and] [expansion] joint devices.

Section [______-____________]: Recessed [plumbing] access cover frames.

Section [______-____________]: Floor drains.

Section [______-____________]: Recessed [electrical access cover frames.] [floor outlets.]

RELATED SECTIONS

Section [______-____________]: Concrete subfloor with [broom] [_____] finish.

Section [______-____________]: Formed steel stair pans.

Section [______-____________]: [Wood] [_____] subfloor.

Section [______-____________]: Building expansion joints.

Section 07900 - Joint Sealers: Joint between terrazzo base and wall surface.

Section 09410 - Portland Cement Terrazzo.

Section 09726 - Seamless Aggregate Flooring.

Section [______-____________]: Precast terrazzo [tile.] [__________.]

REFERENCES

ASTM C150 - Portland Cement.

NTMA (National Terrazzo and Mosaic Association, Inc.) - Terrazzo Ideas and Design Guide.

SUBMITTALS

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

Shop Drawings: Indicate divider strip [and control joint] layout, details of adjacent components [and] [________].

Product Data: Provide data for [divider strips,] [control joint strips,] [expansion joints,] [sealer,] [and] [________].

Samples: Submit [two] [_______] samples, [____x____] inch ([____x____] mm) in size illustrating color, chip size and variation, chip gradation, matrix color [and ground top surface of divider strip].

MAINTENANCE DATA

Submit cleaning and maintenance data under provisions of Section [01700.] [________.]

Include procedures for stain removal, stripping, and sealing.

QUALITY ASSURANCE

Perform Work in accordance with [NTMA.] [________.]

Maintain [one copy] [[____] copies] of [each] document on site.

QUALIFICATIONS

Applicator: Company specializing in performing the work of this section [with minimum [__________] years [documented] experience] [approved by manufacturer].

MOCKUP

Provide mockup of floor, base, [border,] [and] [curb] under provisions of Section [01400.] [________.]

Provide [________] mockup, [____] feet ([____] m) long by [____] feet ([____] m) wide of terrazzo flooring, and [3] [_____] lineal ft ([one] [_____] m) of base, [curb,] [and] [border].

Locate [where directed.] [________.]

Mockup may [not] remain as part of the Work.

DELIVERY, STORAGE, AND HANDLING

Deliver, store, protect and handle products to site under provisions of Section [01600.] [________.]

Store resin materials in a dry, secure area.

Maintain minimum temperature of [55] [_____] degrees F ([13] [_____] degrees C).

Keep products away from fire or open flame.

ENVIRONMENTAL REQUIREMENTS

Do not install terrazzo when temperature is below [50] [____] degrees F ([10] [____] degrees C) or above [90] [____] degrees ([32] [____] degrees C).

Maintain this temperature range 24 hours before, during, and [72] [____] hours after installation of flooring.

Provide lighting level of [80] [____] ft candles ([860] [____] lx) measured at floor surface.

PART	PRODUCTS

MANUFACTURERS

[__________________________________] Product [_________].

[__________________________________] Product [_________].

[__________________________________] Product [_________].

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

MATERIALS

Epoxy Matrix: Two component resin and epoxy hardener with mineral filler and color pigment, non-volatile, thermo-setting.

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

Polyacrylate Matrix: Resinous composition for modifying cement, containing color pigment, non-volatile.

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

Polyester Matrix: Two component resin and hardener with mineral filler and color pigment, thermo-setting.

Portland Cement: ASTM C150, Type 1; [white] [gray] color; modified to NTMA higher compressive strength requirements.

Surface Aggregate: Crushed [marble,] [granite,] [glass,] No. [0 - 1] [____] size in accordance with NTMA chip size for standard gradation, uniform coloration.

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

Surface Aggregate: Type, color, and size to match existing.

ACCESSORIES

Divider Strips: [____] inch ([____] mm) thick [zinc] [brass] [plastic] exposed top strip, zinc coated steel concealed bottom strip, [____] inch ([____] mm) deep, with anchoring features; [________] manufactured by [____________].

Control Joint Strips: [____] inch ([____] mm) nominal width [zinc] [brass] exposed top strip, zinc coated steel concealed bottom strip, [1/8] [1/4] [____] inch ([3] [6] [____] mm) wide neoprene filler strip between vertical strips, with anchoring features; [________] manufactured by [____________].

Strip Height: To suit thickness of terrazzo topping, with allowance for grinding.

Base Cap, Base Divider Strip, and Separator Strip: Match divider strips [with projecting base of [1/2] [____] inch ([13] [____] mm).]

Non-Slip Inserts: [Zinc] [Brass] [________], [3/8 x 3/8] [____x____] inches x [20] [_____] gage ([9 x 9 x 0.9] [____x____x____] mm) dove-tail shaped channels, with anchors, filled with [aluminum oxide] [carborundum] [________] non-slip filler; [________] manufactured by [____________].

Cleaner: Neutralizing liquid type, pH of 7; [________] manufactured by [____________].

Sealer: Colorless, penetrating liquid type to completely seal matrix surface; not detrimental to terrazzo components; [________] manufactured by [____________].

[Wood Subfloor Joint Tape: [Cloth] [________] type.]

[Subfloor Filler: [Latex] [__________] type.]

Primer: [________].

PROPORTIONING

Topping: [Three] [____] parts aggregate chip; [one] [____] part aggregate dust; [one] [____] part matrix binder and hardener.

FLOOR COLORS

Matrix: [________] color [as selected].

Surface Aggregate: NTMA [________] color.

BASE [AND BORDER] COLORS

Matrix: [________] color [as selected].

Surface Aggregate: NTMA [________] color.

STAIR TREAD, LANDING, AND STRINGER COLORS

Matrix: [________] color [as selected].

Surface Aggregate: NTMA [________] color.

PART	EXECUTION

EXAMINATION

Verify that substrate surfaces are ready to receive work.

Do not begin terrazzo work until concrete substrate has cured [28] [____] days, minimum.

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

Do not begin terrazzo work until wood substrate has dried to a maximum moisture content of [12] [____] percent.

PREPARATION

Clean substrate of foreign matter.

Apply slurry coat to substrate.

[Prepare wood subfloor, tape joints, and apply subfloor joint filler.]

[Apply primer to manufacturer's instructions.]

INSTALLATION - ACCESSORIES

[Saw cut substrate to install divider [and control joint] strips.]

Install divider [and control joint] strips straight and level to locations indicated.

Install non-slip inserts in floors where indicated[.] [and at stair nosings.]

Install [mat] [access panel] [________] recess frames.

Install base [, border] divider [and control joint] strips to match floor pattern. [Install terminating cap strip at top of base; attach securely to wall substrate.] [Form [____] inch ([____] mm) wide border with divider strips.]

APPLICATION - TERRAZZO

Place terrazzo mix over [prepared] substrate to a minimum thickness of [1/4] [____] inch ([6] [____] mm).

APPLICATION - BASE

Flush Vertical Base: [3/8] [____] inch ([9] [____] mm) minimum topping bonded to wall.

APPLICATION - STAIRS

Terrazzo Treads and Landings: Minimum [1/4] [____] inch ([6] [____] mm) on treads and minimum [1/8] [____] inch ([3] [____] mm) on risers.

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

Terrazzo Treads and Landings in Metal Pans: [1/4] [____] inch ([6] [____] mm) terrazzo.

CURING

Cure terrazzo topping by [sheet polyethylene] [________] curing method.

Close area to allow undisturbed curing.

FINISHING

Finish terrazzo to NTMA requirements.

Produce terrazzo finish surface [to match approved [mockup] [sample]], with [70] [____] percent chip exposed.

Grind terrazzo surfaces with power disc machine; sequence with coarse to fine grit abrasive, using a wet method.

Apply patch mix to match mortar over ground surface to fill honeycomb exposed during grinding.

Remove patch coat by grinding, using a fine grit abrasive.

Hand grind base [and cove] similarly.

TOLERANCES

Maximum Variation from Flat Surface: [1/8] [____] inch in 10 feet ([3] [____] mm in one m).

Maximum Variation from Level (Except Surfaces Sloping to Drain): [1/8] [____] inch ([3] [____] mm).

CLEANING

Scrub and clean terrazzo surfaces with cleaner in accordance with manufacturer's instructions. Let dry.

Immediately when dry, apply sealer in accordance with manufacturer's instructions. Let dry.

[Seal and polish surfaces, in accordance with manufacturer's instructions.]

PROTECTION OF FINISHED WORK

Protect finished installation under provisions of Section [01500.] [________.]

Do not permit traffic over finished terrazzo surfaces.

SCHEDULE

Main Foyer 112: Epoxy terrazzo, NTMA Plate No. S183, 3/8 inch thick.

Shower Room 213: Epoxy terrazzo, NTMA Plate No. S188, 1/4 inch thick, non-slip strips.

Locker Room 214: Polyacrylate terrazzo, NTMA Plate No. S190, 3/8 inch thick.

END OF SECTION