SikaEmaco® 430
(formerly MEmaco T 430)
RAPID-STRENGTH REPAIR MORTAR WITH EXTENDED WORKING TIME
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SikaEmaco® 430 is a one-component high-performance cementitious repair mortar. It is especially suited for cold weather installations and the repair of freezer floors.
- Wide temperature application range (20 to 100° F [-7 to 38° C])
- Rapid high early strength with extended working time
- Low residual moisture, can be coated in as little as 6 hours
- Only requires the addition of potable water
- No bonding agent required
- Excellent resistance to freeze/thaw cycling
- Can be extended up to 55% by weight, providing higher yields
Usage
- Repairs in cold weather conditions
- In-service freezer floor repairs
- Interior and exterior
- Horizontal surfaces
- Applications requiring high early-strength gain
- Structural concrete repairs
- Partial and full-depth repairs
Substrates
- Concrete
Advantages
- Wide temperature application range (20 to 100° F [-7 to 38° C])
- Rapid high early strength with extended working time
- Low residual moisture, can be coated in as little as 6 hours
- Only requires the addition of potable water
- No bonding agent required
- Excellent resistance to freeze/thaw cycling
- Can be extended up to 55% by weight, providing higher yields
Packaging
55 lb (25 kg) polyethylene-lined bags
Product Details
Chemical Base
SikaEmaco® 430 contains modified cementitious binder, aggregate, and additives.
Shelf Life
6 months when properly stored
Storage Conditions
Store in unopened containers in cool, clean, dry conditions
Solid content by mass
| Property | Value |
| Water, % by weight | 8.0 |
Viscosity
| Property | Value |
| Flow at 5 drops | 100 |
Abrasion Resistance
| 30 min | 0.0120 inch (0.0305 cm) |
| 60 min | 0.0240 inch (0.0610 cm) |
Compressive Strength
| 3 hrs | 1,000 psi (7 MPa) |
| 24 hrs | 4,500 psi (31 MPa) |
| 7 days | 7,800 psi (54 MPa) |
| 28 days | 9,000 psi (62 MPa) |
Modulus of Elasticity in Compression
| 5.1 x 106 psi (35 GPa) |
Flexural Strength
| 1 Day | 7 Day | 28 Day |
| 580 psi (4.0 MPa) | 880 psi (6.1 MPa) | 1,150 psi (7.9 MPa) |
Tensile Strength
| Direct tensile bond | 1 Day | 7 Day | 28 Day |
| 100 psi (0.7 MPa) | 170 psi (1.2 MPa) | 290 psi (2.0 MPa) |
Splitting tensile strength
| 1 Day | 7 Day | 28 Day |
| 550 psi (3.8 MPa) | 1,100 psi (7.6 MPa) | 1,250 psi (8.6 MPa) |
Shear Strength
| Slant shear bond | 1 Day | 7 Day | 28 Day |
| 1,800 psi (12.4 MPa) | 3,000 psi (20.7 MPa) | 3,360 psi (23.2 MPa) |
| Direct shear bond | 1 Day | 7 Day | 28 Day |
| 150 psi (1.0 MPA) | 390 psi (2.7 MPA) | 450 psi (3.1 MPa) |
Freeze-Thaw Stability
| 98.5 % RDM | (ASTM C 666 A) |
Freeze Thaw De-Icing Salt Resistance
| 25 cycles | CaCl*: 0.003 lb/ft2 NaCl: 0.067 lb/ft |
| 50 cycles | CaCl*: 0.005 lb/ft2 NaCl: 0.084 lb/ft2 |
*Typical results from 3 days moist-cured and 39 days air-cured samples. Results were obtained when material was mixed with 0.52 gallons (2 L) of water per bag and cured at 72° F (22° C). Expect reasonable variations depending on mixing equipment, temperature, application methods, test methods, and curing conditions.
Application
Pot Life
~45 minutes, at 70° F (21° C)
Thinner
| 50° F (10° C) | 70° F (21° C) | 90° F (32° C) | |
| Initial set | 140 min | 75 min | 65 min |
| Final set | 160 min | 90 min | 75 min |
NOTES ON INSTALLATION
For Best Performance
- Do not use SikaEmaco® 430 for patches less than ½" (13 mm) deep.
- Do not use where applications require featheredging.
- Low material and placement temperatures may accelerate setting times. Increased mixing time with higher shear may lessen this phenomenon.
- Do not mix partial bags.
- Do not add plasticizers, accelerators, retarders, or other additives.
- For professional use only; not for sale to or use by the general public.
- Make certain the most current versions of product data sheet and SDS are being used
- Proper application is the responsibility of the user. Field visits by Sika personnel are for the purpose of making technical recommendations only and not for supervising or providing quality control on the jobsite.
SUBSTRATE PREPARATION
Concrete:
- Concrete must be structurally sound and fully cured (28 days).
- Saw cut the perimeter of the area being repaired into a square with a minimum depth of 1" (25 mm).
- Refer to current ICRI Guideline no. 310.2R for surface prep requirements to permit proper bond.
Reinforcing Steel
- Remove all oxidation and scale from the exposed reinforcing steel in accordance with ICRI Technical Guideline No. 310.1R.
- For additional protection from future corrosion, coat the prepared reinforcing steel with Sikagard® P 8100 AP
MIXING
- Precondition material to 70° F ±5° (21° C ±3°) before mixing.
- Use a minimum ½" slow-speed drill and mixing paddle or an appropriately sized mortar mixer. Do not mix by hand.
- Pour ½ gallon (1.9 L) of clean water per bag of SikaEmaco® 430 into mixer.
- Add the powder to the water and mix approximately 3 minutes. Add small amounts of additional water as needed only after the first 2 minutes of mixing. No more than 1 pint of additional water per bag should be required to achieve a flowable mortar. Mix an additional 2 minutes after adding extra water. Use neat material for patches less than 1" (25 mm) in depth.
- For deeper patches, a 55 lb (25 kg) bag of SikaEmaco® 430 may be extended by adding up to 30 lbs (13.6 kg) of thoroughly washed, SSD, sound, non (ASR) reactive 1/4–½" (6–13 mm) rounded aggregate. When using angular aggregate, reduce the maximum amount added to 25 lbs (11.4 kg) to obtain the proper workability.
- Aggregate must comply with the requirements of ASTM C 33.
APPLICATION
- After removing all standing water, thoroughly scrub a thin layer of bond coat into the saturated surface with a stiff-bristled broom or brush. Do not dilute the bond coat with water. Do not apply more of this bond coat than can be covered with mortar before the bond coat dries. Do not retemper the bond coat.
- Immediately place the repair mortar from one side of the prepared area to the other. Work the material firmly into the bottom and sides of the patch to ensure a good bond. Level the SikaEmaco® 430 and screed it to the elevation of the existing concrete. Apply the appropriate finish.
- Finish the completed repair, as required, taking care not to overwork the surface.
- The recommended application range of SikaEmaco® 430 is from 20 to 85° F (-7 to 29° C). Follow ACI 305 and 306 for hot or cold weather.
- A maximum of 45 minutes should be allowed to mix, place, and finish SikaEmaco® 430 at 70° F (21° C).
Topcoating
- Sika has a wide range of polymer flooring products for topcoating. Contact your local representative for more information. For epoxy systems, allow 6 hours at 72° F (22° C) before topcoating.
- For polyester or vinyl ester systems, allow to cure 24 hours at 72° F (22° C) before priming and topcoating. Consult coating supplier for overcoating requirements. CURING Cure with an approved curing compound compliant with ASTM C 309 or preferably ASTM C 1315.
CURING TREATMENT
Cure with an approved curing compound compliant with ASTM C 309 or preferably ASTM C 1315.
CLEANING OF TOOLS
Clean tools and equipment with clean water immediately after use. Cured material must be removed mechanically.