Pebblecreteis a Self-Compacting, Self-Drying Topping, Based on High-Hydrated Cement Technology

PEBBLECRETE

DESCRIPTION

PEBBLECRETEis a self-compacting, self-drying topping, based on High-Hydrated Cement Technology, that is specially formulated for fast-track resurfacing and construction of interior horizontal wear surfaces.

AREAS FOR USE:

• Suitable for retail stores, mall corridors, showroom floors, restaurant floors, hotel lobbies, swimming pools and surrounds, domestic driveways and loft apartments;
• For applications where a unique, non-slip, exposed aggregate and creative floor is desired;

LIMITATIONS

• Do not install over substrates containing asbestos or over substandard underlays.
• Do not install over particleboard, gypsum-based patching materials or any other dimensionally unstable materials.
• PEBBLECRETE accepts a wide variety of acid-based, acrylic-based or colloidal-based stains and a wide variety of penetrating and topical sealers as well as epoxy or urethane coatings. Due to the wide variety of products available, mockups must be performed to verify optimal results and timing for staining,sealing or coating. ALWAYS perform mockup tests to verify compatibility between PEBBLECRETE,colorants and other materials.
• Before application of PEBBLECRETE, always properly prepare the surface and prime with GALLANT FLOOR FIX sand broadcast method (see the respective Technical Data Sheets for details).
• Always use the GALLANT sand broadcast method for applications where the highest quality decorative surface is required, and/or where high point load, heavy traffic and/or potential deflection of slab is anticipated.
• Use 12mm minimum thickness of PEBBLECRETE when dealing with rolling dynamic loads such as palette trucks, forklifts or other rubber-wheeled vehicles.
• PEBBLECRETE is for use in interior or exterior areas.
• Use only between the temperatures of 10°C and 35°C. In cooler conditions, use indirect auxiliary heaters to maintain ambient and substrate temperatures within the required range. For temperatures above 29°C, follow ACI hot-weather application guidelines to ensure a successful installation.
• Always provide for expansion and control joints where specified. Do not bridge expansion or control joints. Failure to honour existing joints may lead to the formation of hairline or larger cracks in the underlayment, as well as disbanding of the topping. Where control or expansion joints do not exist in the substrate, provide for them in the system.
• Always isolate any sharp corners that protrude into the room receiving the topping, as well as column bases, supports or equipment pedestals, etc, using caulking or foam tape to round them off. Consider the use of foam tape around the perimeter of the pour if the circumstances require it.
• PEBBLECRETE is not suitable for such excessive service conditions, heavy manufacturing, or chemical or industrial applications. In these cases, specify a topping designed for the specific environment.

**NOTE: To insure installation success, test a small area for compatibility, bond strength and performance.**

SUITABLE SUBSTRATES

• Substrate must be free from hydrostatic pressure, and moisture vapour transmission must not exceed 2,27kg per 92,9 SQM per 24 hours. Use a calcium chloride test (reference ASTM F1869) before application. Consult the sealer manufacturer’s recommendation regarding the maximum allowable moisture vapour emission rate (MVER) and retained moisture content in the substrate.
• For substrates with an MVER exceeding 2,27kg and 92,9 SQM per 24 hours, using a calcium chloride test (reference ASTM F1869), install “Planiseal EMB” or “Planiseal VS” moisture-reduction barrier.

**NOTE: The maximum allowable MVER is always determined by the complete system installed, including primers and sealers.**

Consult GALLANT STONE’s Technical Services Department for installation recommendations regarding substrates and conditions not listed.

SURFACE PREPARATION

• All substrates must be structurally sound and stable.
• Thoroughly clean the surface of any substance that could interfere with the bond of the installation material, including dirt, paint, tar, asphalt, wax, oil, grease, latex compounds, sealers, curing compounds,form release agents, laitance, loose toppings, foreign substances and adhesive residue.
• Mechanically profile concrete surfaces and prepare by shotblasting, sandblasting, scarifying or other engineer-approved methods (reference ICRI CSP 2 to 4 standards for acceptable profile height).
• Ensure that concrete substrate and ambient room temperatures between are between 10°C and 35°C before application. Temperatures must be maintained within this range for at least 72 hours after the installation of PEBBLECRETE.
• Fill deep areas, holes or cracks with appropriate concrete restoration materials, especially when installing on a floor on the second story or higher where fluid could leak to the floor below (contact GALLANT STONE’s Technical Services Department for details).
• Always prime the prepared surface with GALLANT STONE’s FLOOR FIX before the application of PEBBLECRETE.
• Do not apply primer over standing water.
• Install a suitable moisture-reduction barrier if moisture vapour transmission exceeds 2,27kg per 92,9SQM) per 24 hours. Apply a small test area to ensure compatibility with the moisture-reduction barrier before general installation. Once the barrier is cured, is a GALLANT STONE-approved priming method before the application of PEBBLECRETE (see TDSs of primers for details).
• When installing over properly prepared steel decking or metal, the surface must meet L/360 deflection requirements.

MIXING

**NOTE: Choose all appropriate safety equipment before use. Refer to Material Safety Data Sheet (MSDS) for more information.**

General Mixing:

Into a clean mixing container, pour the required amount of cool, clean, potable water. If available water is not cool, chill water to 21°C. Add PEBBLECRETE powder while slowly stirring. Mix water and PEBBLECRETEpowder to a mixing ratio of 4,50 to 4,73L of water per 20kg bag of PEBBLECRETE.

Pump Mixing:

PEBBLECRETE can be mechanically mixed, using the appropriate mixing action above, with a continuous mixer or pump (with at least 15,2ml of hose. Mixer and pump must be in good working condition. Periodic cleaning of pumping equipment is required per the manufacturer’s instructions. Be sure to pressure-test rotor and stator for proper mixing. Use a mesh-screen “sock” at the end of the hose to catch any foreign material that could enter the hopper of the mixer. Apply to a small test area before general application to ensure a successful installation.

PRODUCT APPLICATION

• Read all the installation instructions thoroughly before installation.
• Application of PEBBLECRETE over large areas can be made easier and more efficient by using conventional piston, rotor-stator or underlayment-type pumps (contact GALLANT STONE’s Technical Services Department for recommendations).
• For best results, work as a team to provide a continuous flow of wet material to maximise working and finishing time and achieve a uniform finish throughout.
• PEBBLECRETE has an approximate flow time of 15 minutes at 23°C, is self-levelling and can be applied from 6mm to 5cm in a single application. Please note that the temperature and humidity will affect working time, flowability and setting time. Apply enough material to adequately cover all high spots.
• Immediately after placing the PEBBLECRETE, spread the material with a guage rake. After achieving the desired depth, smooth with a smoother to obtain an even surface. To avoid air entrapment, do not overwork the material. PEBBLECRETE quickly hardens within 2 – 3 hours and is ready to accept water-based coatings or sealers in as little as 24 hours. Sealers and coatings protect surfaces from contaminants and soiling, optimising the surface integrity and aesthetics.

CURING AND PROTECTION

• PEBBLECRETE is self-curing, do not use a damp-curing method, or curing and sealing compounds.
• Avoid walking on the installed surface for at least 2 -3 hours after installation, depending upon temperature and humidity conditions.
• Do not expose PEBBLECRETE to rolling dynamic loads, such as forklifts and scissor lifts, for at least 48 hours after installation.
• Always apply a protective coating or sealer over PEBBLECRETE. PEBBLECRETE can generally be stained, coated or sealed 24 hours after application. Deeper applications and cooler temperatures may require a longer waiting period before application of subsequent treatments. Follow the recommendations of the stain, sealer or coating manufacturer. Test all surface treatments on a representative sample area before application, to ensure adequate installation techniques as well as the desired results.

CLEANUP

• Wash hands and tools with water promptly before material hardens.
• Cured material must be mechanically removed.

PRODUCT PERFORMANCE PROPERTIES
LABORATORY TESTS / RESULTS
Flammability / Flame Spread: 0
Fuel Contribution: 0
Smoke Development: 0
Compressive Strength: / ASTM C109 (CAN / CSA – A5)
1 day / > 2500 psi (17,2 MPa)
7 days / > 4400 psi (30,3 MPa)
28 days / > 6100 psi (42,1 MPa)
Flexural Strength: / ASTM C348 (CAN / CSA – A23.2 – 8C)
1 day / > 650 psi (4,48 MPa)
7 days / > 1280 psi (8,83 MPa)
28 days / > 1400 psi (9,66 MPa)
**Note : Protect containers from freezing in transit and storage. Provide for heated storage on site and deliver all materials at least 24 hours before work begins.**
SHELF LIFE AND APPLICATION PROPERTIES (BEFORE MIXING)
Shelf Life / 6 months in original bag, in dry, heated and covered place
Physical State / Powder
Colours / Light Grey, Ivory, Sandstone
SHELF LIFE AND APPLICATION PROPERTIES (MIXED)
Mixing Ratio / Water / PEBBLECRETE (powder) ratio: 4,50 to 4,73L per 20kg bag)
Density / 2,06kg per L
pH / 11
Application Temperature Range / 10°C to 35°C
Pot life / 20 – 30 minutes
Flowing time / 15 minutes
Final Set / 2 -3 hours
Time required before installation of stains or coatings / Typically 4 – 24 hours depending on the coating, stain, temperature and humidity
CSI DIVISION CLASSIFICATIONS
Concrete Toping / 03 53 00
Cast in Place Concrete / 03 30 00
APPROXIMATE PRODUCT COVERAGE
**Coverages shown are for estimating purposes only. Actual jobsite coverages may vary according to substrate conditions and setting practices.**
Yield / 0,014m³
Coverage at 6mm thickness / 2,23m²
Coverage at 12mm thickness / 1,11m²

TECHNICAL ADVICE CENTRE

Gallant Stone, Plot 4, Witkoppen Road, Northriding

Tel: 011026 8229 / Fax: 086536 9510

Email: