NBS Source
ARDEX A 38 MIX Pre-Blended Rapid Drying Screed

Application

For internal and external screeds.  Ideal for restricted areas where mixing equipment cannot be used.

Description

A special cement for producing a rapid setting, hardening and drying floor screed for internal or external use, including swimming pools, allowing ceramic tiles or stone to be fixed after only four hours, even on unbonded and floating screeds. It 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.


Features and benefits:

  • Rapid hardening – walkable in three hours.
  • Receives ceramic and natural stone tiles directly after only four hours for bonded, unbonded and floating screeds.
  • Install resilient, wood finishes and vinyl floor coverings after 48 hours.
  • After only one day the compressive and tensile bending strengths of ARDEX A 38 exceeds the acceptable minimum attained by an ordinary cement screed after 28 days.
  • Can be used with underfloor heating systems.
  • Can be pumped for fast application.
  • Compressive strength: After one day: 25.0 N/mm², After seven days: 40.0 N/mm², After 28 days: 45.0 N/mm².
  • Tensile bending strength: After one day: 4.0 N/mm², After seven days: 4.5 N/mm², After 28 days: 5.5 N/mm².


Thickness:

Should be applied at the following thicknesses for normal cement/ sand screeds:

  • Minimum 15 mm (design thickness up to 40 mm) for bonded screeds.
  • Minimum 40 mm for unbonded screeds.
  • Minimum 75 mm for floating screeds (65 mm in lightly loaded (domestic) locations).
  • When used for screed repair, it can be applied to the full thickness of the existing cement/ sand screed.

General information

Color

Grey

Finish

Smooth

Material

Cement

Shape

Formless

Length

Bespoke

Width

Bespoke

Height

Recommended thickness for type of screed needed:


Bonded: 15-40mm

Unbonded: 40mm+

Floating Domestic: 65mm+

Floating Commercial: 75mm+

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Uniclass

Pr_35_31_06_69 Quick-drying levelling screed mixesPrimary
Pr_35_31_06_77 Screed flooring

CAWS

M42/220 Concrete/ screed substrates

M42/30 Concrete/ Screed substrates

M10/115 Cement:sand levelling screeds

M10/130 Proprietary quick drying levelling screeds

M10/110 Bonded cement:sand levelling screeds

M10/4 Cement:sand levelling screeds

Product range

Floor Screeds

Specification data - Quick-drying levelling screed mixes Enhanced data

Fine aggregate

Required.

Included.

Mix

Pre-mixed, no need to add aggregate.

Pre-mixed, no need to add aggregate

Drying time

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

3—48 hours.

Bonded

15 mm.

Unbonded

40 mm.

Floating floor

75 mm.

65 mm.

Lightly loaded/domestic locations.

Environmental information

Country of product manufacture

United Kingdom

Digital objects

Platform Compatible Version Certified to
Revit

Revit 2016

2

2.0
IFC
-

2

2.0
Download now from NBS National BIM Library

Literature

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

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