NBS Source
ARDEX A 35 Ultra Rapid Drying Screed Cement

Application

Used to produce bonded, unbonded and floating screeds for internal locations. It can also be used for large repairs to existing cement/sand screeds. Suitable for situations where early foot traffic and rapid hardening is required.

Description

A special cement used in place of Portland Cement in cement: sand screeds for producing a rapid setting and drying floor screed that can be used as a bonded screed, an unbonded floor screed laid onto a membrane, or a floating screed laid onto compressive quilt or insulation material. It will be dry after 24 hours at 20°C to receive floor finishes, regardless of thickness.


Features and benefits:

  • Walkable in three hours.
  • Receives ceramic and natural stone tiles directly after 24 hours.
  • Install carpet, wood and vinyl floorcoverings after 24 hours, or just, four hours for carpet and vinyl when smoothed with ARDEX A 55.
  • Passes BRE Screed (ISCR) Testing after six hours.
  • After just one day, achieves the acceptable minimum compressive and tensile bending strengths attained by an ordinary cement screed after 28 days.


Screed thickness:

The following thicknesses are recommended for screeds using ARDEX A 35:

  • Bonded screeds: Minimum 15 mm (design thickness up to 40 mm).
  • Unbonded screeds: Minimum 50 mm.
  • Floating screeds: Minimum 75 mm (minimum 65 mm in lightly loaded (domestic) locations).
  • Screed repairs: Can be applied to the full thickness of the existing cement/sand screed.


Mix proportions:

  • Heavy duty: A 1:4 mix is recommended where a very heavy duty floor is required.
  • Standard: A 1:5 mix is recommended for all normal screeding situations.

General information

Material

Cement

Shape

Formless

Height

Recommended thickness for type of screed needed:


Bonded: 20-40mm

Unbonded: 50mm+

Floating Domestic: 65mm+

Floating Commercial: 75mm+

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Uniclass

Pr_35_31_06_69 Quick-drying levelling screed mixesPrimary

CAWS

M10/115 Cement:sand levelling screeds

M10/130 Proprietary quick drying levelling screeds

M10/4 Cement:sand levelling screeds

M10/7 Proprietary quick drying levelling screeds

M40/20 Existing backgrounds/ bases generally

M40/320 Existing concrete/ screeds

Product range

Floor Screeds

Specification data - Quick-drying levelling screed mixes Enhanced data

Cement

Portland.

Fine aggregate

Required.

Mix

1 part cement to 1 part sand or 1:5 depending on mix design.

Bonded

15 mm.

Unbonded

50 mm.

Floating floor

75 mm.

65 mm.

In lightly loaded/domestic locations.

Drying time

  • 3 hours: Walkable.
  • 24 hours: Receives ceramic and natural stone tiles.
  • After 24 hours: Install carpet, wood and vinyl floorcoverings.

3—24 hours.

Compressive strength - 1 day

23.0 N/mm².

1:5 mix.

25.0 N/mm².

1:4 mix.

Compressive strength - 28 days

32.0 N/mm².

1:5 mix.

40.0 N/mm².

1:4 mix.

TensileStrength

After 28 days.

6.0 N/mm².

1:5 mix.

7.0 N/mm².

1:4 mix.

Standards

To BS 8204-1, BS 5385-3 and BS 8000-9.

Environmental information

Country of product manufacture

United Kingdom

Digital objects

Platform Compatible Version Certified to
Revit

Revit 2016

1

1.3
IFC
-

1

1.3
Download now from NBS National BIM Library

Literature

ARDEX Tiling Guide

ARDEX Tiling Guide

ARDEX Fast Track Floor Screed Brochure

ARDEX Fast Track Floor Screed Brochure

ARDEX Datasheets Booklet

ARDEX Datasheets Booklet

ARDEX RIBA CPD Seminar Brochure

ARDEX RIBA CPD Seminar Brochure

ARDEX Screed Thickness Guide

ARDEX Screed Thickness Guide

ARDEX Screed Drying Times

ARDEX Screed Drying Times

Case studies

British Museum - London

British Museum - London

King's Cross Railway Station

King's Cross Railway Station

Piccadilly Circus Underground Station - London

Piccadilly Circus Underground Station - London

Savoy Hotel Restoration Project

Savoy Hotel Restoration Project

Burj Khalifa - Dubai

Burj Khalifa - Dubai

Madrid Airport

Madrid Airport

Third party certifications

Environmental Product Declaration (EPD) - IBU

ARDEX A 35 Environmental Product Declaration (EPD)

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