Description Ardex Ardurapid A45 Repair Mortar is a rapid drying and hardening, slump free mortar for internal repairs. The mixed mortar sets after 15 minutes and can be trafficked after just 90 minutes regardless of thickness at 20°C. Available in 11kg bags. Ardex Ardurapid A45 is ideal for: • Re-profiling, repairing and refacing internal concrete stairtreads and risers, cement and sand screeds and concrete floors. • Filling and patching cracks in walls, ceilings and soffits. • Making good around pipework, door and window frames. • Forming ramps from a feather edge to normal screed thicknesses. • Forming coves. When using Ardex Ardurapid A45 as a wearing surface a suitable coating is required. Surface Preparation: Ardex Ardurapid A45 can be applied to dry or moist screeds providing they are set and hardened and the surface is sound and free of dust, grease, oil and other surface contamination. Worn or trafficked surfaces should be abraded (wire brush, angle grinder etc.) to remove contamination and expose a clean surface to ensure good adhesion. Very dense, smooth impervious surfaces should be primed with Ardex P4 Primer. Priming is not usually necessary on concrete, cement/ sand, brickwork etc., unless the surface is extremely porous. Direct to earth sub-floors must have an effective damp proof membrane, such as Ardex DPM 1C. Mixing: Ardex Ardurapid A45 powder is added to the required amount of clean water in a clean mixing container and mixed thoroughly to obtain a lump free and slump resistant mortar. The mix proportions are:- 11kg Ardex Ardurapid A45 powder to 21/2 litres of water: i.e. approximately 3 parts powder to 1 part water by volume. Avoid using too much water. The mixed mortar has a working time of 10 to 15 minutes at 20°C, this time being extended at lower, and reduced at higher temperatures. The Ardex Ardurapid A45 Mortar can be applied up to 20mm neat in isolated areas, but for economy Ardex Coarse Aggregate or 1/3 volume of coarse screeding sand can be added to the mix. For thicknesses over 20mm, and up to 50mm, for holes etc., an equal volume of Ardex Coarse Aggregate must be used. For localised thicknesses exceeding 20mm e.g. filling deep holes and wide cracks, incorporate an equal volume of 10mm single sized coarse aggregate in the mortar. NOTE: When using aggregate filled mortars apply a neat layer of the Ardex Ardurapid A45 mortar to act as a bonding coat applied fresh in fresh. Application: Repairs: Apply the mortar with a trowel to holes, cracks, damaged and worn areas, ensuring that the mortar “wets” the surface by trowelling in firmly, leaving the repair proud. After about 15 minutes trim off excess and finish off with a wet trowel, sponge or sponge float to obtain a smooth surface. As soon as the Ardex Ardurapid A45 repair has hardened, the surface of the floor, stair tread etc., can be levelled, if necessary, with the appropriate Ardex levelling and smoothing compound. Smoothing and Refacing: Apply the mixed mortar with a trowel to the required thickness. The material may be finished with a wet trowel after 15 to 20 minutes to provide a finish suitable for direct application of floorcoverings. High aggregate content mixes may require a second application of ‘neat’ Ardex Ardurapid A45 or Ardex Feather Finish. Apply at temperatures above 5°C. Coverage: Depending on the flatness of the surface, an 11kg bag will cover approximately 7m2 at 1mm thick (7 litres of mortar). Technical Data: Bulk density of powder approx. 1.4kg/litre Weight of fresh mortar approx. 1.9kg/litre Initial Set (Vicat) DIN 1164 approx. 15 mins at 20°C Final Set (Vicat) DIN 1164 approx. 60 mins at 20°C Product Datasheet Click here to view this product on the manufacturers website.
