SECTION 09825

AGGREGATE WALL SURFACING

PART	GENERAL

SECTION INCLUDES

[Epoxy] [________] binder matrix.

Aggregate surfacing.

[Clear protective overcoat].

PRODUCTS FURNISHED BUT NOT INSTALLED UNDER THIS SECTION

Section [______-____________]: Perimeter edging.

PRODUCTS INSTALLED BUT NOT FURNISHED UNDER THIS SECTION

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

Section [______-____________]: Recessed [light fixture] [soffit vent] [________] frames.

RELATED SECTIONS

Section [______-____________]: Substrate wall surface.

Section [______-____________]: Substrate [soffit] [ceiling] [and bulkhead] surface.

Section [______-____________]: [Cap] [Drip] [Head] [Sill] [____] flashings.

Section 07900 - Joints Sealers: [Perimeter] [________] sealant with adjacent materials.

REFERENCES

ASTM C67 - Methods of Sampling and Testing Brick and Structural Clay Tile.

ASTM D570 - Test Method for Water Absorption of Plastics.

ASTM D635 - Test Method for Rate of Burning and/or Extent and Time of Burning of Self-Supporting Plastics in a Horizontal Position.

ASTM D638 - Test Method for Tensile Properties of Plastics.

ASTM D695 - Test Method for Compressive Properties of Rigid Plastics.

ASTM D905 - Test Method for Strength Properties of Adhesive Bonds in Shear by Compressive Loading.

ASTM D952 - Test Method for Bond or Cohesive Strength of Sheet Plastics and Electrical Insulating Materials.

ASTM E84 - Surface Burning Characteristics of Building Materials.

ASTM E96 - Test Methods for Water Vapor Transmission of Materials.

NTMA - National Terrazzo Manufacturers Association.

UL - Underwriter's Laboratories Inc., Fire Resistance Directory.

SUBMITTALS

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

Shop Drawings: Indicate dimensions, locations of edging, divider and control joints, panel layout, locations of [light fixtures] [soffit vents] [________], and [________].

Product Data: Provide data indicating matrix materials, physical and performance characteristics, accessories and [________].

Samples: Submit [two] [_______] samples, [____x____] inch ([____x____] mm) in size illustrating color of matrix, color of aggregate [, and clear protective overcoat].

Manufacturer's Installation Instructions: Indicate special procedures, perimeter conditions requiring special attention, and [________].

Manufacturer's Certificate: Certify that [Products] [________] meet or exceed [specified requirements.] [________.]

MAINTENANCE DATA

Submit under provisions of Section [01700.] [________.]

Maintenance Data: Include maintenance and cleaning requirements for coatings, stain [and graffiti] removal, rejuvenation of top coat, repair and patching techniques, and [________].

QUALITY ASSURANCE

Perform surface preparation work on primed or unfinished steel surfaces in accordance with SSPC [________].

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

QUALIFICATIONS

Manufacturer: Company specializing in manufacturing the Products specified in this section with minimum [three] [_______] years [documented] experience.

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

REGULATORY REQUIREMENTS

Conform to [applicable] [___________] code for flame/smoke rating of [____/____] in accordance with [[UL] [____] requirements.] [ASTM E84.]

MOCKUP

Provide mockup of applied glazed coating under provisions of Section [01400.] [________.]

Provide [________] mockup, [____] feet ([____] m) long by [____] feet ([____] m) wide, illustrating applied aggregate in the selected color.

Locate [where directed.] [________.]

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

ENVIRONMENTAL REQUIREMENTS

Do not install matrix materials when substrate and ambient temperature is below [50] [____] degrees F ([10] [____] degrees C) or above [90] [____] degrees F ([32] [____] degrees C).

Maintain this temperature range, 24 hours before, during, and [48] [____] hours after installation of work.

Provide temporary enclosures, heat, and ventilation in areas where work is being performed, to allow work to cure.

Restrict traffic from area where coating is being applied or is curing.

MAINTENANCE MATERIALS

Provide maintenance materials under provisions of [01700.] [________.]

Provide [1] [____] gallon ([4] [____] l) of each matrix color specified.

Provide [5] [____] gallon ([20] [____] l) of aggregate type, size, and color specified.

Label each container with manufacturer's name, product number, color number, and areas where used.

PART	PRODUCTS

MANUFACTURERS

[__________________________________] Product [_________].

[__________________________________] Product [_________].

[__________________________________] Product [_________].

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

MATERIALS

Binder Matrix: [Epoxy resin and hardener] [________], breathable type, [100] [____] percent solids [and sand,] conforming to the following:

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

Cementitious Binder Matrix: Portland cement modified with [acrylic polymers] [________], graded [silica] [________] sand, fine mineral [colored] aggregate, and [________]; conforming to the following:

Property	ASTM Test	Result

Tensile Strength	D638	[1500] [____] psi ([10] [____] MPa)

Compressive

Strength	D695	[7000] [____] psi ([48] [____] Mpa)

Water Absorption	D570 24 hr	[0.3] [____] percent

Moisture Vapor

Permeability	E96	[3] [____] perms ([172] [____] mg/Pa/sec/sq m)

Flammability	D635	self extinguishing

Bond Strength	[D905] [D952]	[____] psi ([____] Kpa) minimum

Freeze/Thaw Cycle	C67 Method B	[50] [____] cycles, no destruction of finish or binder

Aggregate Surfacing: Crushed, angular shaped [marble,] [granite,] [quartz,] [limestone,] washed, free of dust and fines, graded to NTMA [#1] [#2] [#3] [____] size chip.

Overcoat: [Acrylic] [________], breathable type, clear, [ozone resistant,] non-yellowing.

ACCESSORIES

Corner Beads, Casing Beads and Base Screeds: Minimum [26] [____] gage ([0.50] [____] mm) thick, [steel with galvanized coating] [rigid extruded PVC] [solid zinc], of longest practical lengths, sizes and profiles to suit application, [square] [bullnosed] [beveled] casing bead.

Control Joints: [W shape with expanded mesh flanges] [back-to-back casing beads], of same material as corner and casing beads.

Fasteners: Nails or staples of durable non-corrosive metal, sized to suit application.

Primer [and Filler Base]: [As recommended by surfacing materials manufacturer for specific substrate surface.] [[________] type, [________] manufactured by [____________].]

COLOR

Matrix Binder: [________] color [as selected].

Aggregate: [________] color [range] [as selected.] [From [________] standard color chart.]

PART	EXECUTION

EXAMINATION

Verify substrate conditions under provisions of Section [01039.] [________.]

Verify that substrate surfaces are ready to receive work as instructed by the coating manufacturer.

Do not begin work until cementitious substrate has cured [28] [____] days minimum, and measured moisture content is not greater than [16] [____] percent. [Measure concrete surface for negative alkalinity with litmus paper test.]

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

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

[Verify masonry joints are struck flush.]

PREPARATION

Clean surfaces of loose foreign matter.

[Strip existing paint or coatings from surface.]

[Clean existing painted or sealed surfaces with mixture of trisodium phosphate and water to remove surface grease or foreign films.]

Prepare metal surfaces in accordance with SSPC SP [____].

Mask and protect adjacent surfaces and materials not receiving surfacing, from over spray; repair damage.

PRIMER AND SURFACE SEALING

Patch [wood] [concrete] [________] substrate with filler to produce smooth, even surface.

Apply masonry filler to [concrete and] masonry substrate wall surface in accordance with manufacturer's instructions; to a minimum thickness of [30] [40] [____] mils ([0.8] [1] [____] mm).

Apply primer to [all] [________] surfaces.

INSTALLATION - ACCESSORIES

Place metal accessories to lines and levels.

Install control joints at maximum [12] [____] ft ([3.6] [____] m) centers. Divide areas into panels not exceeding [125] [____] sq ft ([11.6] [____] sq m) in area.

APPLICATION

Apply matrix, aggregate, and overcoat in accordance with manufacturer's instructions.

Apply binder to a minimum thickness of [3/16] [1/4] [____] inch ([4] [6] [____] mm).

[Spray] [Trowel] apply aggregate evenly, embedding into matrix to ensure bond. Allow binder to set.

Vacuum clean surface.

[Brush] [Roller] [Spray] apply overcoat.

TOLERANCES

Maximum Variation From Flat Surface: [1/8] [____] inch ([3] [____] mm).

CLEANING

Clean work under provisions of [01700.] [________.]

Clean surfaces of overspray, splatter, excess material, and [________].

PROTECTION OF FINISHED WORK

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

Protect elements surrounding the work of this Section from damage or disfiguration.

SCHEDULE

Exterior Canopy Fascia: Portland cement plaster substrate, 1/4 inch matrix bed, #1 chip of "Dark Brown" color, clear overcoat.

Main Lobby Feature Wall: Gypsum board substrate, 1/8 inch matrix bed, #0 chip of three colors to graphic design on drawings, no overcoat.

END OF SECTION