Rapid hardening and drying cement for floor screeds. Used in place of Portland Cement in cement/sand screeds. ARDEX A 35 produces a floor screed that can be walked on after 3 hours and is dry enough to receive floor coverings after 24 hours regardless of screed thickness or 4 hours when smoothed with ARDEX A 55. After 1 day the compressive and tensile strengths of an ARDEX A 35 screed exceed the acceptable minimum attained by a conventional screed after 28 days.