How To Apply Bedding Mortar For Ironworks

The area should be prepared to the correct specification for the application. All application substrates must be sound, clean and free from dust, dirt, debris, oil, grease and other contaminants. Proper surface preparation is vital to ensure the successful application and durable performance of the concrete. All substrates should be pre-wetted with water prior to the application of the mortar, however any standing water should be removed.

Required Materials

• Twin Handled Mixing Unit
• Mixing Paddle
• HardMaster Bedding Mortar Options:
  • HardMaster W660 – 60 minute setting time
  • HardMaster W690 – 90 minute setting time
  • HardMaster W668 – Fibre Reinforced and 60 minute setting time
• Trowel
• Water

Please note: water is added first then the concrete mix is added to the water. 

For best results HardMaster bedding mortars, should be mixed using a steel Meon OX Pro Mixing Paddle coupled with a twin handled mixing unit.

DO NOT re-mix or add extra water to extend the working time of the material.

NOTE: Water consumption can be impacted by calcium content i.e. in different soft water and hard water areas.

HardMaster W668 Fibre Reinforced Bedding Mortar should be applied at a thickness of 10mm – 100mm in a single pass. If thicker sections are required, this can be achieved using the layer-on-layer method.

HardMaster W668 FR Bedding Mortar should be placed on the pre-wetted application area without delay after mixing.

Apply an even bed thickness to the whole application area ensuring a nominal 5-10mm excess thickness is present to allow for bedding of the frame. Lift the frame in to position (using suitable lifting equipment as neces- sary) and lower the frame onto the still malleable mortar. Care should be taken to avoid creating air voids under the frame at this stage. The frame should then be tamped down to the correct height, ensuring the top of the frame sits level to surface of the road. Point up the inner and outer exposed surfaces ensuring all voids are filled.

Once the bedding mortar has reached initial set, the backfill concrete – HardMaster W610 trowelable or HardMaster W615 Flowable can be mixed and placed. Recommended ambient application temperature is 5°C to 25°C.

For optimum results, use Meon BituSeal, bitumen edge sealer to seal any vertical edges, then apply and compact Meon PatchMaster to the finished level of the ironwork. Meon ThermaBand can then be applied to the surface joints to prevent future cracking. (See corresponding TDS Sheets for more information).

Recommended ambient application temperature is 5°C to 25°C.

6.  Clean Off The Tools

Clean off the tools, paddles and floats using water. Discarding any waste water according to your waste disposal guidelines. 

Recommended Mixer

We recommended the Collomix Cordless Mixer, being cordless makes it possible to work in remote areas, and it is incredibly powerful. Make sure you have secured the bucket before you use this. The Collomix makes light work of concrete, resin bound mixing and plaster. 

REMEMBER!