Description
Ardex SD-T B Levelling Base Mix is a pumpable Subfloor Pre-Levelling Base Mix, pre-blended with graded aggregate to give significant cost savings on floors that require greater application thicknesses. Designed to pre-level concrete surfaces prior to applying Ardex K80 Levelling Compound.
Ardex SD-T B Levelling Base Mix comes in 25kg bags.
When mixed with water, Ardex K80 produces a fluid self-levelling mortar which can be applied by trowel or pump as a floor finish from 5mm-10mm. Where thick applications are required the cost effective Ardex SD-T B base mix can be initially applied from 10mm-50mm depth to level the concrete base. The ‘Rapidry Formula’ technology of the this base mix means that within only hours of its application a minimum 5mm thickness of Ardex K80 can be applied.
The Ardex K80 Industrial Floor System is virtually tension free and provides a very high strength surface which has enough resiliency to accept heavy wheeled traffic, such as that found in industrial factories, workshops and warehouses, etc. Independent testing at Aston University has confirmed the excellent inherent abrasion resistance of Ardex K80/SD-TB Industrial Floor System ensuring its suitability for a wide range of applications.
When applying Ardex K80 on top of Ardex SD-T B base mix, ensure any contamination is removed prior to priming with Ardex P51 primer mixed 1:2 with water using a broom in accordance with the Priming and Preparation data sheet. The surface of the base mix must be thoroughly primed and the primer allowed to dry prior to applying the Ardex K80. NOTE: Any joints or cracks in the concrete base where differential movement is anticipated e.g. movement joints, should be brought through to the finished surface. Ardex K80 and Ardex SD-T B should not be used in external or areas subject to wetting.
Mixing Ardex SD-T B:
To the required amount of clean water in a clean mixing container add the powder whilst mixing thoroughly using an Ardex mixing paddle with a 10mm chuck variable speed (600 -1,000 rpm) electric drill, until a smooth lump free mortar is produced. For each 25kg bag of Ardex SD-T B, add 3 & 1/2 to 3 & 3/4 litres of clean water. Use the minimum amount of water for thick applications or cold conditions. Do not use more than 3 & 3/4 litres per bag.
Thickness:
Ardex SD-T B base mix can be applied at thicknesses down to 10mm. However, to benefit from its levelling properties it should be applied at least 15mm thick. When applying at thicknesses of over 20mm, larger aggregate may be incorporated.
Coverage:
Approximately 1.87kg Ardex SD-T B base mix powder/m2/mm, e.g. one bag will cover approximately 1.3m2 at 10mm thickness. NOTE: The coverage figure is based on a flat level surface, additional material should be allowed for where the surface is rough or uneven.
Technical Data:
Working time at 20°C: approximately 15 minutes
Flow life at 20°C: approximately 10 minutes
Initial Set (Vicat): approximately 11/2hours
Final Set (Vicat): approximately 2 hours
Compressive Strength (EN 196) 28 days: approximately 30 N/mm2
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