Product Data Sheet Show all documents
SikaEmaco® 440

SikaEmaco® 440

(formerly MEmaco S 440)

LOW DUST, POURABLE, AND PUMPABLE PRE-EXTENDED SELF-CONSOLIDATING REPAIR MORTAR

SikaEmaco® 440 is a low dust one-component, shrinkage-compensated, self-consolidating repair mortar. It is designed for large volume repairs, including structural elements in applications from 1.5" (38 mm) to full depth.

  • The dual expansion system compensates for shrinkage in plastic and hardened states
  • Low-dusting for added worker comfort and safety
  • High early strength allows early form removal
  • Low permeability protects against carbon dioxide and chloride intrusion
  • Excellent freeze/thaw resistance for durability in cold, wet environments
  • Flowability makes it ideal for placement by pumping or pouring into congested locations
  • Self-consolidation minimizes honeycombing without vibration
Product Data Sheet Show all documents

Usage

  • Interior and exterior
  • Large-volume structural repairs
  • Repair or replacement of concrete elements
  • Formed horizontal, vertical, and overhead repairs

Substrates
  • Concrete
 

Advantages

  • The dual expansion system compensates for shrinkage in plastic and hardened states
  • Low-dusting for added worker comfort and safety
  • High early strength allows early form removal
  • Low permeability protects against carbon dioxide and chloride intrusion
  • Excellent freeze/thaw resistance for durability in cold, wet environments
  • Flowability makes it ideal for placement by pumping or pouring into congested locations
  • Self-consolidation minimizes honeycombing without vibration

Packaging

55 lb (25 kg) polyethylene-lined bags

Product Details

Product Information

Chemical Base

SikaEmaco® 440 is a proprietary blend of cement, graded aggregate, shrinkage-compensating agents, and additives.

Shelf Life

1 year when properly stored

Storage Conditions

Store in unopened containers in cool, clean, dry conditions

Density

Fresh wet density 142lb/ft3 (2,275kg/m3)

(ASTM C 138)
Technical Information

Compressive Strength

2" (51 mm) cubes

1 day

2,500psi (17.2MPa)
7 days5,000psi (34.5MPa)
28 days6,000psi (41.4MPa)

3 by 6" (76 by 152 mm) cylinders

28 days

5,000 (34.5)

Flexural Strength

28 days1,150psi (7.9MPa)(ASTM C 348)

Splitting tensile strength

28 days

500psi (3.4MPa)

(ASTM C 496)

Shear Strength

Slant shear bond strength at 28 days

3,000psi (20.7MPa)(ASTM C 882, (modified1))

Shrinkage

28 days

350 μstrain

(ASTM C 157, (unmodified))

21 days

611 μstrain

(ASTM C 157, (modified))

Coefficient of Thermal Expansion

5.5in/in/°F x 10-6
(9.9cm/cm/°C x 10-6)		(CRD C 39)

Freeze-Thaw Stability

100% Relative Dynamic Modulus

(ASTM C 666)

Design Considerations

Dust reduction for SikaEmaco® 440 vs. control

70%

(DIN55992-2)

Potential Alkali-Silica Reactivity

<0.10% Aggregate (Innocuous expansion)

(ASTM C 1260)

Application

Application Information

Flowability

Slump Flow*25in (63.5cm)
Visual Stability Index0 (Highly Stable - No Bleeding)
J-Ring Slump Flow* 24.5in (62.5cm)
Passing Ability0.5in (1cm) No visible blocking

*2.75 qts water / 55 lb bag (Minimum water addition)
Consumption

Coverage

0.43 ft3 (0.012 m3) per 55 lb (25 kg) bag
Application steps

NOTES ON INSTALLATION

  • Minimum ambient, surface, and material temperature is 40 °F (4 °C) and rising.
  • Do not mix for longer than 5 minutes.
  • The minimum application thickness is 1.5” (38 mm). When the depth is less than 1.5”, use SikaEmaco® 440 MC.
  • Do not mix partial bags.
  • Do not use to make overlay repairs where the surface of fresh, wet SikaEmaco® 440 will remain unrestrained during cure.
  • Do not vibrate
  • 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 the 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.

SURFACE PREPARATION

Concrete

  1. Concrete must be structurally sound and fully cured (28 days).
  2. Saw cut the perimeter of the area being repaired into a square with a minimum depth of ½” (13 mm).
  3. Refer to current ICRI Guideline no. 310.2R for surface prep requirements to permit proper bond.

Reinforcing Steel

  1. Remove all oxidation and scale from the exposed reinforcing steel in accordance with ICRI Technical Guideline No. 310.1R.
  2. For additional protection from future corrosion, coat the prepared reinforcing steel with Sikagard® P 8100 AP.

MIXING

  1. Ensure that SikaEmaco® 440 is thoroughly mixed; a forced-action mixer is essential. Mixing in a suitably sized container using an appropriate paddle with a slow-speed (400–500 rpm) heavy-duty drill is acceptable. Do not use free-fall mixers.
  2. Measure 2.7 quarts (2.6 L) of potable water and pour 2 quarts into the mixer. With the machine in operation, add 1 full 55 lb (25 kg) bag of SikaEmaco® 440 and mix for 1 minute before adding the rest of the water. Always add powder to the water. The quantities mixed may be scaled up as required.
  3. Mix for a further 2–3 minutes to obtain a smooth consistency.
  4. When using the drill-and-paddle mixing method, place the complete 2.7 quarts (2.6 L) of water in the mixing drum. With the paddle rotating, add 1 full 55 lb (25 kg) bag of SikaEmaco® 440 and mix for 3 minutes to reach a smooth, even consistency.
  5. Depending on the ambient temperatures and the desired consistency, additional water may be added. The total water content should not exceed 2.9 quarts (2.7 L) per 55 lb (25 kg) bag.
 

APPLICATION

  1. Build forms in accordance with ACI 347R. Keep the unrestrained surface area of the repair to a minimum.
  2. Saturate the prepared concrete substrate by filling the prepared formwork with clean water 24 hours before placement.
  3. Immediately before the placement of SikaEmaco® 440, completely drain this water and seal the drainage outlets, leaving the substrate saturated surface-dry (SSD) with no ponded water remaining.
  4. In jobsite circumstances where the formwork cannot be filled with water to achieve an SSD surface, the prepared concrete substrates must be thoroughly hosed down with clean water to achieve an equal level of saturation. Apply the repair material with sufficient pressure to ensure intimate contact with the substrate.
  5. A long open-time bonding agent such as SikaEmaco® P 124 may be used in place of a saturated substrate. In such a case, place the SikaEmaco® 440 before the bonding agent becomes tack-free.
  6. Immediately after mixing, pump or pour the SikaEmaco® 440 into the formed area. The material does not require vibrating.
  7. The recommended application range of SikaEmaco® 440 is from 40 to 85 °F (4 to 29 °C). Follow ACI 305 and 306 for hot or cold weather guidelines.

CURING TREATMENT

  1. Leave the formwork in place until the compressive strength reaches 2,500 psi (17.2 MPa) or a strength specified by the engineer.
  2. Cure with an approved curing compound compliant with ASTM C 309 or preferably ASTM C 1315. If the repair area will receive a coating, wet curing is recommended

CLEANING OF TOOLS

Clean tools and equipment with clean water immediately after use. Cured material must be removed mechanically.

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