ARDEX A 35

ARDEX A 35 is a special cement for producing a rapid setting, rapid hardening and ultra rapid drying floor screed. After only one day the compressive strength and tensile bending strength of an ARDEX A 35 screed exceeds the acceptable minimum attained by an ordinary cement screed after 28 days and is also dry, irrespective of thickness. ARDEX A 35 can be used to produce a bonded screed, an unbonded floor screed laid onto a membrane, or a floating floor screed laid onto a compressive quilt/insulating material. Bay divisions and expansion joints should be incorporated as for normal cement/sand screeds, taking into account the advice given in the code of practice for the flooring being subsequently applied. The mortar is mixed and applied in the same way as for normal cement/sand mortar, except that the working time is reduced to approximately 60 minutes at 20°C. ARDEX A 35 can be walked on 3 hours after application and is dry enough to receive floorcoverings after 24 hours at 20°C. However, where the ARDEX A 35 screed is smoothed immediately after application with ARDEX A 55 Ultra Rapid Drying Self-Levelling Compound, vinyl and textile floor coverings may be applied after as little as 4 hours. NOTE: Where the concrete base is insufficiently dry, or is direct to ground without an effective protection from rising damp, the ARDEX A 35 cement and sand screed must be laid over an effective damp proof membrane, e.g. ARDEX DPM for bonded screeds, or a suitable sheet membrane for unbonded or floating screeds.

• Rapid hardening – walkable in 3 hrs
• Ultra rapid drying – receives floor coverings, including ceramic tiles, after 24 hours regardless of thickness
• Apply as a bonded, unbonded or floating screed
• Can be pumped for fast application
• Rapid strength development
• Can be used with underfloor heating systems