Sikadur®-42 MP Slow

• CE marking and declaration of performance based on EN 1504-6:2004 Products and systems for the protection and repair of concrete structures — Anchoring reinforcing steel bar

Epoxy resin

24 months from date of production

The Product must be stored in original, unopened and undamaged sealed packaging in dry conditions at temperatures between +5 °C and +30 °C. Protect the Product from direct sunlight. Always refer to the packaging.

TEST SPECIMEN SIZE: 50 MM × 50 MM × 50 MM

TEST SPECIMEN SIZE: 12.7 MM × 12.7 MM × 25.4 MM

API requirements: ≤ 0.5 % at 2.76 N/mm² load

Resistant to many chemicals. Contact Sika Technical Services for specific information.

Sikadur® resins are designed to have low creep under constant load, but all polymers will creep over time. Therefore, the long-term design load should typically be set at 20–25 % of the failure load. For specific applications, please consult a structural engineer to calculate the appropriate load.

STANDARD

ADJUSTED MIXING RATIO, DEPENDING ON FLOWABILITY

*No reduction of fillers; apply only with mixing ratio A : B : C = 5 : 1 : (30–36)

Beware of condensation. Substrate temperature during application must be at least +3 °C above dew point.

200 g, adiabatic testing, mixing ratio 5 : 1 : 30

Note: Pot life begins when the resin and hardener are mixed.

Note: Pot life is shorter at high temperatures and longer at low temperatures.

Note: The greater the quantity of product mixed, the shorter the pot life.

Note: Apply the following methods for obtaining a longer pot life at high temperatures:

1. Divide the mixed product into smaller quantities.
2. Cool down parts A and B before mixing. Do not cool below +5 °C.

IMPORTANT

Reduced adhesion due to surface contamination

Surface contaminants such as dust and loose material, including the contaminants generated during substrate preparation, can reduce the Product's performance.

1. Before applying the Product, thoroughly clean all substrate surfaces using vacuum or dust removal equipment.

IMPORTANT

Damage to the substrate or equipment due to vibration

For optimum results when grouting critical equipment, follow the surface preparation requirements of the latest edition of the American Petroleum Institute Recommended Practice 686 “Machinery Installation and Installation Design”, Chapter 5.

Verify the substrate strength to ensure design strengths are achieved.

CONCRETE

Substrates must be sound, clean, dry or matt damp but free of standing water. Substrates must be free of contaminants such as ice, dirt, oil, grease, coatings, laitance, efflorescence, surface treatments and loose friable material.

Concrete must be at least 28 days old.

Suitable techniques for substrate preparation include the following:

• Hand-chiselling

• Abrasive blast cleaning

• Grinding

• Light scabbling

• Needle gunning

• Bush hammering

• High-pressure water blasting

1. Prepare the substrate mechanically using a suitable technique.
2. Remove any debris from pockets or holes for structural fixings.

The substrate has an open-textured, gripping surface profile.

STEEL

Surfaces must be cleaned and prepared thoroughly to a quality standard equivalent to SA 2.5 (bright metal) with a surface profile to satisfy the necessary tensile adhesion strength requirement.

Surfaces must be sound, clean, and free of contaminants such as dirt, oil, grease, coatings, rust and loose friable material.

For best results, the substrate must be dry.

1. IMPORTANT Avoid dew point conditions. Prepare the substrate mechanically using a suitable technique such as blast-cleaning or grinding.
2. Remove any debris, for example by vacuum equipment.
3. Apply the Product immediately to prevent re-oxidizing and rust formation.

IMPORTANT

Poor workability and unfavourable handling time due to wrong mixing

1. When using multiple units during application, do not mix the following unit until the previous unit has been used.

IMPORTANT

Change in properties caused by addition of solvents

Solvents can prevent proper curing and change mechanical properties.

1. Do not thin with solvents.

IMPORTANT

Excess heat due to delay in adding Part C

Mixing Part A and Part B causes an exothermic reaction to take place. Excess heat and smoke is generated if there is a delay in adding Part C.

1. Adding Part C helps to reduce the heat from the exothermic reaction because some of the heat is absorbed by the aggregate.
2. Add Part C as soon as Parts A + B are sufficiently mixed.

PRE-BATCHED UNITS

1. IMPORTANT Mix full units only. Prior to mixing all parts, mix Part A (resin) and Part B (hardener) briefly using a mixing spindle attached to a slow speed electric mixer (max. 300 rpm).
2. Add Part B (hardener) to Part A.
3. Mix Parts A + B continuously for at least 3 minutes until a uniformly coloured mix with a smooth consistency has been achieved.
4. Pour the mixture into a suitable mixing container.
5. While mixing Parts A + B, gradually add Part C (aggregate).
6. IMPORTANT Do not mix excessively. Mix until a uniform mix is achieved.

BULK PACKAGING

1. Prior to mixing all parts, mix Part A (resin) and Part B (hardener) briefly using a mixing spindle attached to a slow speed electric mixer (max. 300 rpm).
2. Add Parts A + B in the correct proportions into a mixing container.
3. Mix Parts A + B continuously for at least 3 minutes until a uniformly coloured mix with a smooth consistency has been achieved.
4. While mixing Parts A + B, gradually add the correct proportion of Part C (aggregate).
5. IMPORTANT Do not mix excessively. Mix until a uniform mix is achieved.

IMPORTANT

Risk of damage due to sudden temperature changes during curing

Product performance may be impaired if it is subjected to sudden temperature changes, especially during the early curing stages.

The Product is a vapour barrier when cured

Note:

Store the Product in an area with an ambient temperature between +20 °C and +30 °C for a minimum of 48 hours before using.

FORMWORK

1. Select suitable formwork (permanent or temporary) to contain the grout around areas such as base plates.
2. Ensure all edges and joints of the formwork are sealed tightly to prevent leakage or seepage of the grout.
3. Coat all surfaces of the formwork that will come into contact with the grout with polyethylene film or wax to prevent adhesion.
4. Arrange the formwork to maintain a liquid head of more than 100 mm to facilitate the placement of the grout.
5. Attach a grout box with an inclined trough to the formwork to enhance grout flow and minimize air encapsulation.

GROUTING WITH FORMWORK

1. IMPORTANT Maintain a 100 mm grout head to avoid trapping air. Ensure continuous grout flow during the complete grouting operation. Pour the mixed grout into the formwork from one or two sides only.
2. Place sufficient grout in the formwork to rise slightly above the underside (3 mm) of the base plate.
3. Where the void beneath the base plate is greater than the maximum allowable grout thickness (see Layer thickness), place the grout in successive lifts once the preceding lift has hardened and cooled.
4. Keep the last lift to maximum 50 mm.
5. Once hardened, check the adhesion by tapping with a hammer.

Sweep excess grout into appropriate containers for disposal before it has hardened. Dispose of in accordance with applicable local regulations.

Clean all tools and application equipment with Sika® Colma Cleaner at regular intervals and immediately after use. Hardened material can only be removed mechanically.