CHEMCRETEX CEM600

APPLICATION

Limitations: do not apply CHEM-CRETEX CEM600 products when temperature falls below 5ºC (41ºF) or if temperature is expected to fall below 5ºC (41ºF) within 24 hours. Don’t apply CHEM-CRETEX CONCETRATE CEM600 slurry coat to horizontal concrete surfaces which are less than 24 hours old.

 

General Specification for Concrete Finish: concrete surfaces shall have an open capillary system to provide tooth and suction and shall be clean; free from scale, oil, laitance, curing compounds and any other contaminates.  Smooth surfaces caused by steel forms, etc. or surfaces covered with form oil and other contaminants shall be washed, lightly sand-blasted, or water-blasted to provide a clean surface.

 

Vertical surfaces may have a sacked finish.  Horizontal surfaces shall not be troweled, or power troweled and shall be left with a rough float finish or (preferably) a broom finish.  If power troweling is required, it shall be kept to a minimum.

 

Surface Preparation:

I- Old Concrete:  surfaces must be clean and sound.  Remove all oil, dirt, laitance and other contaminants by water blasting or using concrete cleaners like CHEM-CRETE CONCLEAN CCC060.  Water blasting is preferred for surface preparation, it mechanically cleans and roughens the surface also it leaves the surface saturated with water.  Surfaces must be saturated and/or damp with water for application of CHEM-CRETEX CEM600 products to insure proper migration of crystalline chemicals into the capillary voids in the concrete.

 

II- New Concrete: after forms are stripped of new ‘GREEN’ concrete, clean the concrete by water blasting or concrete cleaner like CONCLEAN CCC060 to remove form oil, curing compounds, sand, laitance and any other contaminants. Surface must be left saturated and/or damp with water for application of CHEM-CRETEX CEM600 products.

 

Joints and Cracks: construction joints, cold joints, and non-leaking cracks greater than 3.0 mm in width must be routed out to sound concrete; 1 inch (25.4mm) wide by 1 inch (25.4 mm) deep.  Leaking cracks greater than 3 mm in width must be routed to sound concrete; 1 – 1.5 inch (25.4 – 38.3 mm) wide by 1 inch (25.4 mm) deep. Clean all debris and loose concrete from leaking area.  Saturate routed area with water and leave damp for application of CHEM-CRETEX CEM600 products.

 

CHEM-CRETEX CONCENTRATE CEM600C

Water Requirements: use only clean fresh water for mixing with CHEM-CRETEX CONCENTRATE CEM600C, the following mixing ratios are recommended:

• Slurry Coat – Brush Application: 2.5 parts CHEM-CRETEX CONCENTRATE CEM600C to 1-part water by volume is recommended for brush and broom applications.

Note: using 2.5: 1 volume mix ratio, a 55 Lb (25 kg) CEM600C requires 1.75 Gallons (6.624 liters) water.

• Slurry Coat – Spray Application: 2 parts CHEM-CRETEX CONCENTRATE CEM600C to 1-part water by volume is recommended for spray applications. Spray application may require slightly different proportions in order to properly match the type of equipment and pressures

Note: using 2: 1 mix ratio, a 55 Lb (25 kg) CEM600C requires 2.20 Gallons (8.3 liters) water.

 

Pot Life (Working Time): 35 minutes @ 77^○F (25^○C)

Setting Time, ASTM C191: 45 minutes @ 77^○F (25^○C)

 

Coverage – CHEM-CRETEX CONCENTRATE CEM600C:

a.	Dry shake on freshly poured concrete	1.25 to 2.5 Lb/yd2 (0.68 to 1.36 Kg/m2)
b.	Slurry coat using brush, spray, and roller application	1.60 to 2.5 Lb/yd2  (0.87 to 1.36 kg/m²)

The above coverage is for estimation purposes, slight variations may occur depending on the porosity and substrate conditions.

 

A slurry coat application of CHEM-CRETEX CONCENTRATE CEM600C using a coverage rate of 2.5 Lb/yd² (1.3 kg/m²) yields an average 0.75 mm coating thickness. Required number of coats will depend on application conditions.

 

Using coverage rate of 2.5 Lb/yd² (1.3 kg/m²), a 55 Lb CHEM-CRETEX CONCENTRATE CEM600C will cover 22 yards² (18.4m²).

 

Mixing: Mix CHEM-CRETEX CONCENTRATE CEM600C thoroughly with a slow speed drill equipped with mixing paddle. For large batches, mix with mortar mixer. Allow 2-3 minutes mixing and waiting time before start applying the material. Material should be mixed in quantities, which can be applied within 30 minutes from the time of mixing at approximately 75°F (24°C) ambient temperature.  As the mixture thickens, it shall be stirred frequently to restore workability, no additional water should be added.

 

Application:

 

Dry Shakes for Newly Poured Concrete:  Use CHEM-CRETEX CONCENTRATE CEM600C powder as is, directly from its container.  Wearing rubber gloves and dust mask, distribute the powder evenly by hand over freshly poured concrete at the rate of 1.25 lbs. to 2.50 lbs./yard² (0.68 to 1.36 kg/m²) before final floating operation.  It is best to distribute the powder at half the recommended rate in one direction and the other half at a right angle to the first application.  Keep hands as close as possible to the surface to prevent material from blowing away.  For large areas, a rotary type spreader may be used.  Float slab and trowel to final finish.

 

Slurry Coat for Existing Concrete: CHEM-CRETEX CONCENTRATE CEM600C slurry coat may be applied using brush, broom, or sprayer at the rate of 1.60 to 2.5 Lbs./yard² (0.87 to 1.36 kg/m²).  Be sure to work slurry well into openings, rough surfaces, joints and routed out areas.  Apply second coat, if required, when first coat has taken initial set.  If first coat has dried out, moisten before applying second coat.

 

Repair to Existing Leaking Structures: The CHEM-CRETEX CEM600 products can be used to stop leaks from the inside of any concrete or block structure even against high water pressure.  Cold joints, honeycombing, faulty and leaking construction joints, and cracks can all be sealed permanently with CHEM-CRETEX CEM600 products. All concrete deficiencies must be routed out and cleaned thoroughly. If necessary, a plastic or rubber tube is inserted to control the flow of water. The routed-out area is then coated with CHEM-CRETEX CONCENTRATE CEM600C slurry. Fill the reminder of the cavity with CHEM-CRETEX PLUG CEM600P then coat the final surface with CHEM-CRETEX CONCENTRATE CEM600C slurry. When the CHEM-CRETEX PLUG CEM600P has set fully, withdraw the pipe, and plug the hole with CHEM-CRETEX PLUG CEM600P and then coat the surface again with CHEM-CRETEX CONCENTRATE CEM600C slurry.

 

Back Filling: Back filling cannot take place until 36 hours after application.  If back filling takes place within 7 days after application, the back-filling material must be moist so as not to draw moisture from CHEM-CRETEX CONCENTRATE CEM600C coating.

 

Over Coating – Application of Paints, Epoxy or Similar Coating:  the waterproof coating requires 28 days of curing before any such application commences.  Before applying the coating, it is recommended to wash the waterproofed surface with concrete cleaners like CHEM-CRETE CONCLEAN CCC060.

 

Curing: CHEM-CRETEX CONCENTRATE CEM600C applications must be cured for a minimum of two days. After initial set, it is critical to moist cure using water spray. Treated surface should be fog sprayed 3 to 4 times daily for a two-day period.  For warmer climates, more frequent spraying may be required.  It is important to keep the CHEM-CRETEX CONCENTRATE CEM600C moist to allow crystals formation to occur.  Protect surfaces from foot traffic for 2 days or heavy traffic for 5 days.  CHEM-CRETEX CONCENTRATE CEM600C must be protected from extreme weather conditions such as strong wind, freezing, high temperatures and rain for a period of not less than 2 days after application.

 

CHEM-CRETEX MORTAR CEM600M

Pot Life (Working Time): 35 minutes @ 77^○F (25^○C)

Setting Time, ASTM C191: 45 minutes @ 77^○F (25^○C)

 

Mixing: Add sufficient, clean, potable water to the powder to produce a stiff trowelable mortar. Mix thoroughly with a low speed drill equipped with a paddle or use mortar mixer for large batches. Do not mix more material than can be used in 30 minutes at 75ºF (24°C).

 

Priming: Surfaces must be saturated and/or damp with water for application of CHEM-CRETEX MORTAR CEM600M.

 

Application: Apply CHEM-CRETEX MORTAR CEM600M with trowel or spatula, 0.5 inches x 1 inch x 1 yard long joint will require approximately 1.2 Lb of CHEM-CRETEX MORTAR CEM600M (1 cm x 2.5 cm x 1 meter long joint will require approximately 0.46 Kg of CHEM-CRETEX MORTAR CEM600M). Apply mortar to cracks, holes, reglets, and cove areas. Apply CHEM-CRETEX MORTAR CEM600M in layers not greater than 1 inch (2.54 cm). Allow mortar to take initial set before adding additional layers.

 

Curing: CHEM-CRETEX MORTAR CEM600M applications must be cured for a minimum of two days. After initial set, it is critical to moist cure using water spray. CHEM-CRETEX MORTAR should be fog sprayed 3 to 4 times daily for a two-day period.  For warmer climates, more frequent spraying may be required.  It is important to keep the CHEM-CRETEX CONCENTRATE CEM60OM moist to allow crystals formation to occur. CHEM-CRETEX MORTAR CEM600M must be protected from extreme weather conditions such as strong wind, freezing, high temperatures and rain for a period of not less than 2 days after application.

 

CHEM-CRETEX PLUG CEM600P

Pot Life (Working Time): 1 to 2 minutes

 

Mixing: Wearing rubber gloves, add CHEM-CRETEX PLUG CEM600P to clean potable water to form a stiff moldable mix. Work and knead the mixture by hand until lump-free. Mix small quantities which can be applied within 1 to 2 minutes

 

Application: After mixing into a plastic consistency, force it into the leak against solid concrete and apply as much as pressure as possible by hand, holding the pressure for a minimum of 60 seconds. For large cracks or holes, several plugs may be required before leak ceases. Shape the plugged area using a gloved finger or with a small gauge trowel.

 

Cleaning: all tools and equipment must be cleaned with clean water immediately after use.