M45: Rapid Strength Bedding and Repair Mortar

UltraCrete M45 is a rapid-strength bedding and repair mortar for use with all ironwork conforming to BS EN 124. The rapid-set properties and HD27/04 certification make it perfect for emergency concrete road repairs, the levelling of street ironwork, bedding of kerbs, coastal protection and tidal repair projects.

Before laying M45 rapid-strength repair mortar, ensure that your surface is free from any contamination of oil, grease, paint, etc. Remove all loose particles and work on a sound substrate. Pre-soak the area with clean water prior to application to aid bond. Remove ponded water before applying the product.

Mixing

M45 can be mixed with a forced action mixer or by hand with an appropriate tool.  If hand mixing is used, ensure that it is vigorous. 25kg of product will require approximately 3.3 litres of water. A stiff, consistent mix with no slump should be achieved, ensuring all particles are well-wetted.

Note: Mix only enough material to apply within four minutes. Never remix or add extra water.

Apply the bedding material over a pre-soaked area. Once mixed, M45 bedding mortar should be applied to the supporting structure within four minutes. Firm well into position using a float and allow a 5mm excess thickness.

Place the frame onto the bedding mortar, ensuring it is fully supported. Check that the frame does not overhang the mortar at any point (use suitable lifting equipment when positioning the frame).

Care must be taken to prevent voids in the bedding material under the frame, especially in the cover seating area. The frame should then be tamped into place, ensuring the correct level is obtained.

Any holes within the frame should be in-filled, and the flanges of the frame enveloped by a minimum thickness of 10mm of the bedding material. Exposed surfaces of the bedding material should be float finished, ensuring voids are filled.

Remove loose materials and point the inside surface to a smooth finish. Once the bedding material has reached its initial set, the backfill material can be placed.

M45 is supplied pre-blended in 25kg bags or plastic containers and requires only the addition of water. The product can be used from 10mm-75mm in one pass, with greater depths possible using the layer-upon-layer method.

M45 achieves exceptional bond strength without the use of a primer. The product can be bulked out with the addition of up to 30% hard stone clean aggregate.

Please note that this will reduce the product’s strength gain and alter its performance characteristics.

Full technical specification for tensile strength, coverage and compressive strength can be found in the M45 technical datasheet.

M45 repair mortar should be stored in its closed original packaging at temperatures between 5°C and 30°C.

Avoid frost.

Shelf life in correct conditions for sealed packaging is eight months. High temperatures and high humidity will lead to a reduced shelf life.

Please ensure that appropriate PPE is used when preparing, mixing and applying M45 Bedding Mortar. Always wash your hands before consuming food and make sure that materials are kept safely out of reach of children and animals. Please dispose of packaging and waste responsibly and in accordance with local authority requirements.

Download the full Safety Datasheet for M45.

Download the Carbon Footprint Certificate for M45.

All products are manufactured in a plant whose quality management system is certified / registered as being in conformity with BS EN IS0 9001. Our products are guaranteed against defective materials and manufacture, and will be replaced or money refunded if the goods do not comply with our promotional literature.

We cannot, however, accept any liability arising from the application or use of our products because we have no direct or continuous control over where and how our products are used.

All products are sold subject to our conditions of sale, copies of which may be obtained on request.