Description

Solvent free, epoxy lining and benching mortar

Uses

A trowelable epoxy mortar with maximum chemical and abrasion resistance for the protection of concrete and similar substrates. It is ideally suited for the rehabilitation of manholes.

Advantages

• Pre-weighed quality controlled    materials     ensure consistency and reduce risk of site errors

Properties                                                          

• Unaffected by a wide range of acids, alkalis and industrial chemicals
• 2 to 3 times stronger than typical Excellent resistance to abrasion and impact
• Will cure under damp Cured surface is impermeable to water
• Superior chemical and physical bond to virtually all substrates, dry or damp
• Early strength development minimizes maintenance disruption
• No harmful vapours Particularly suitable for enclosed environments
• Designed for easy laying to a fair finish

Description

Nitomortar MH blend of siliceous aggregates is blended together with epoxy resins specifically developed for use in aggressive conditions. Nitomortar MH is simple and cost effective for vertical and horizontal patching and for resurfacing to both dry and damp surfaces. The low odour, non-sag and chemically resistant properties of Nitomortar MH make it the ideal material for long lasting manhole rehabilitation and for use in similarly enclosed structures.

Nitomortar MH can be used in brick, block and all concrete manholes, including precast, and provides an impermeable high strength, monolithic lining to the interior of manhole walls. Nitomortar MH is supplied as a 3 pack material in pre- weighed quantities ready for on-site mixing and use.

Design criteria

Nitomortar MH is designed for application to brick, block or concrete particularly in enclosed environments. It is highly suited for use in the rehabilitation of manholes.

Nitomortar MH can be applied to a depth of 12mm in one application; subsequent applications to increase thickness can be made the following day.

Chemical resistance

Nitomortar MH has been independently tested to ASTM C267 and found to be resistant to 10% sulphuric acid at 50°C. Nitomortar MH is also resistant to a wide range of industrial chemicals. Contact the Fosroc technical department for further details.

Instructions for use

Surface preparation

Surfaces must be clean and structurally sound. Any loose or unsound brick or concrete should be removed. Surfaces must be entirely free of oil, grease, paint, detergents, rust or other surface contaminants. Surfaces should preferably be prepared by high pressure water jetting or light grit blasting, followed by thorough washing to remove dust and remaining particles.

Diesel and oil contaminants should be removed with detergent and rinsed thoroughly with water. Prior to applying Nitomortar MH, all active hydrostatic leaks must be stopped by the use of Renderoc Plug*h, a hydrostatic cement specially formulated to stop the ingress of water.

Substrate Priming

Substrates should be primed using Nitocote Primer Sealer. The primer should be mixed in the proportions supplied, adding the entire contents of the ‘hardener’ Tin to the ‘base’ tin. The two components should be thoroughly mixed together for three minutes. The mixed primer should be scrubbed well into the prepared substrate, taking care that all imperfections in the surface are properly coated and avoiding ‘ponding’ in depressions. If the primer is absorbed within 30 minutes, a second coat should be applied before continuing. Nitomortar MH can be applied as soon as the primer has started to gel but still has surface ‘tack’. This is normally between 30 minutes and 4 hours dependent on the ambient and substrate temperatures. If the primer cures hard, a second application must be made before the application of Nitomortar MH. The usuable life of the mixed primer is approximately 60 minutes at 20°C or 30 minutes at 35°C.

Nitomortar MHÖ

Mixing

The Nitomortar MH components are supplied in pre- weighed quantities. Under no circumstances must part

Estimating

Supply                                                                   

Nitomortar MH                    : 14 litre packs

packs be used. Mechanical mixing is necessary to produce                                                                                                                  

a fully homogeneous mortar.

The entire contents of the hardener tin should be emptied into the base tin and the two components mixed thoroughly

Nitocote Primer Sealer     : 1 & 4 litre packs

Coverage                                                               

Nitomortar MH                    : 2.8 m² @ 5 mm thickness

for 3 – 5 minutes.                                                                                                                                                                                             

Nitocote Primer Sealer     : 26 N/mm²

The mixed resins should then be emptied into a suitably sized mixing drum or bucket. The supplied aggregate should then be added slowly while the product is being continuously mixed by suitable mechanical means, e.g. a heavy duty, slow speed drill (350 – 500 rpm) and approved mixing paddle.

Larger quantities of Nitomortar MH can be mixed in a heavy duty paddle-mixer, however, no more than can be reasonably used within the pot life of the product, should be prepared at any one time.

Application

The mixed material should be used at once. It should be applied to the prepared surfaces with a spatula or steel trowel, pressing the mortar firmly on to all surfaces to ensure positive adhesion.

To avoid sagging on vertical and overhead surfaces, do not apply in thicknesses greater than 12 mm per layer.

Where additional applications are required, do not tightly close the surface of the first layer. Subsequent applications should be made the following day.

To close the surface and to create a smooth, impermeable finish, lubricate the trowel with clean water.

This may give a slight whitening of the surface but does not affect performance.

Important Note: Do not use solvents to thin components or to lubricate the trowel as this will prevent proper cure.

Cleaning

Clean tools and equipment with water or Fosroc Solvent 102 immediately after use.

Storage

All products have a shelf life of 12 months at 30°C if stored in a dry shaded place in the original, unopened bags.

Precautions

Health and safety

Some people are sensitive to epoxy resins and skin contact should be avoided. Gloves and barrier creams such as Kerodex 71 or Rozalex 9 should be used when handling these products. If contact with the resin occurs, it must be removed before it hardens with a resin removing cream such as Kerocleanse 22 or Rozalex 42 followed by washing with soap and water.

Solvents should not be used for cleaning hands. Contact with eyes must be avoided and accidental contamination should be washed thoroughly with plenty of clean water and medical treatment sought immediately. The use of goggles is recommended.

For further information, refer to the Product Material Safety Data Sheet.

Fire

Fosroc Solvent 102 is flammable. Ensure adequate ventilation. Do not use near a naked flame or smoke during use.

Flash point                                                            

Fosroc Solvent 102           : 33°C