Sika MonoTop®-4400 MIC

• Environmental Product Declaration (EPD) in accordance with EN 15804. EPD independently verified by Institut für Bauen und Umwelt e.V. (IBU)

• CE marking and declaration of performance based on EN 1504-2:2004 Products and systems for the protection and repair of concrete structures — Surface protection systems for concrete — Coating

• CE marking and declaration of performance based on EN 1504-3:2005 Products and systems for the protection and repair of concrete structures — Structural and non-structural repair

• Biogenic sulfuric acid test for Sika Mono Top®-4400 MIC, Report No. 20191108-01

• Corrosion test, Lmdc, Test Report No.: ET/19.064c

• Abrasion test, Sika MonoTop®-4400 MIC, Test No.: 21205

• Mortar for construction and rehabilitation of drains and sewers outside buildings DIN 19573, Sika MonoTop-4400 MIC, Test Report No. 426/25-e

Calcium aluminate cement, calcium aluminate aggregates and special additives

15 months from date of production

Product must be stored in original, unopened and undamaged sealed packaging in dry conditions at temperatures between +5 °C and +35 °C. Always refer to packaging.

~3 mm

2.8–3.2 L water per 20 kg bag of powder

STANDARD MANHOLES

LARGE STRUCTURES SUCH AS WET WELLS OR PUMPING STATIONS

Approx. 2.2 kg/L

Approx. 20 kg powder per 10 mm layer thickness and m²

20 kg powder yields approximately 10.5 L fresh mortar

CONCRETE

The concrete must have a minimum compressive strength of 25 MPa and minimum tensile adhesion strength of 1.5 MPa.

1. Clean the substrate thoroughly so it is free from dust, loose material, surface contamination and material which reduces adhesion, prevents suction or wetting by the repair materials.
2. Remove delaminated, weak, damaged and deteriorated concrete and where necessary, sound concrete. Remove using mechanical hand-held tools, high or ultra-high-pressure water blasting equipment.
3. Roughen the surface using mechanical tools such as a chisel or scarifier, or using grit-blasting or high-pressure water blasting equipment.

Aggregate is clearly visible on the surface of the concrete structure after surface preparation.

STEEL REINFORCEMENT

1. Remove rust, scale, mortar, concrete, dust and other loose and deleterious material which reduces bond or contributes to corrosion.
2. Prepare surfaces to bright steel, Sa 2 (ISO 8501-1), using abrasive blast cleaning or high-pressure water blasting equipment.  

PRE-WETTING

Proper pre-wetting prevents the substrate from absorbing water from the mortar.

Preconditions

The water absorbency of the substrate is known and the pre-wetting has been scheduled accordingly.

1. Saturate the substrate with clean, low-pressure water or a wet sponge a recommended 12 hours before application.
2. Keep the surface wet and do not allow to dry
3. Ensure that all pores and pits are thoroughly wet.
4. Just before application, remove excess surface water using a clean sponge or oil-free pressurised air.

The substrate is saturated surface-dry (SSD): it has a dark matt appearance without standing water or glistening, and surface pores and pits do not contain water.

The Product can be mixed with a low speed (< 500 rpm) hand drill mixer or using a forced action mixer.

Do not add Portland cement or additional aggregates.

1. Pour the minimum recommended quantity of clean water in a suitable mixing container.
2. While stirring slowly, add the powder to the water.
3. Mix thoroughly for at least 5 minutes.
4. Add additional water if necessary to the maximum specified amount and adjust to the required consistency.
5. Check the consistency after every mix.

The Product can be applied mechanically using low pressure wet-spray equipment, high pressure dry-spray equipment, progressive cavity type pump, spinning head or centrifugation method. Prepare the hose of the machine with a cement aluminate slurry or with a suitable chemical pump starter. Do not use Portland cement slurry.

Spray equipment must be clean and free of Portland cement contamination to avoid premature setting and reduced corrosion resistance behaviour.

Preconditions

There is no direct sun or strong wind.

The substrate is sound and prepared.

1. Apply the repair mortar to the pre-wetted substrate without forming voids.
2. Observe the minimum and maximum layer thickness.
3. If the required application depth exceeds the maximum layer thickness, build up layers. Allow each layer to stiffen before applying subsequent layers wet-on-wet.
4. Carry out surface finishing to the required texture as soon as the mortar has started to stiffen. Do not overwork the finishing layer. Do not add additional water.
5. Once the surface finishing is complete, apply Sikagard®-230 MIC surface hardener with low-pressure spray equipment to accelerate the hardening process.

Application of Sikagard®-230 MIC is optional after surface finishing. Do not use conventional curing compounds.

LIVE SEWER ENVIRONMENT

Replace the access covers as soon as finishing is complete. This should ensure adequate moisture for good hydration and curing.

OTHER ENVIRONMENTS

In the Product was applied in an environment with low humidity, exposure to direct sunlight, or strong air movement, carry out the following steps to minimise rapid moisture evaporation and surface cracking:

1. As soon as finishing is complete, wet-cure by continuously sprinkling the surface with water for several hours.
2. Replace the access covers.

Clean all tools and application equipment with water immediately after use. Hardened material can only be removed mechanically.