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ARDEX A 38 Ultra Rapid Drying Screed Cement

Name: ARDEX A 38 Ultra Rapid Drying Screed Cement
Brand: Ardex Ltd – Flooring, Tiling & Screeding products
SKU: qC4vT2vESbeE9yUYxAdpbr

Verified by manufacturer 14 days ago

Ardex Ltd – Flooring, Tiling & Screeding products

Third party certifications:

EPD
Certificate type

Produces ultra-rapid drying floor screed which can be walked on after just 3 hours, and have floorcoverings installed in as little as 4 hours, regardless of thickness.

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+44 (0)1440 714939 Website

Application

ARDEX A 38 is used to produce bonded, unbonded and floating screeds for internal and external locations, including wet areas such as swimming pools. It can also be used for large repairs to existing cement/ sand screeds. It is ideal for situations where early foot traffic and rapid hardening is required.

Description

A special cement for producing a rapid setting, hardening and drying floor screed. 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.
Walkable in 3 hours, and receives tiling from 4 hours.
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:

ARDEX A 38 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 50 mm for unbonded screeds.
Minimum 75 mm for floating screeds (65 mm in lightly loaded (domestic) locations).

General information

Color	Grey
Finish	Smooth
Material	Cement
Shape	Formless
Height Recommended thickness for type of screed needed: Bonded: 15-40mm Unbonded: 50mm+ Floating Domestic: 65mm+ Floating Commercial: 75mm+	-

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 Swimming Pool Floor and Wall Build-Up / Screed and Render

Specification data - Quick-drying levelling screed mixes

Fine aggregate	0–8 mm screed sand. Recommended by BS 8204-1:2003, classified to BS EN 13139 standards.
Admixture	Not permitted.
Mix	1:5. Cement:Aggregate

Compressive strength - 28 days	40.0 N/mm².
TensileStrength	5.5 N/mm².
Bonded	15–40 mm.
Unbonded	50 mm.
Floating floor	75 mm. Commercial applications. 65 mm. In lightly loaded/domestic locations.
Drying time Three hours: Walkable. Four hours: Receives ceramic and natural stone tiles. 48 hours: Resilient floorcoverings regardless of thickness.	3–48 mm. Tile after just four hours, regardless of thickness. Install carpet, wood and vinyl floorcoverings after 48 hours.
Standard	To BS 8204, BS 5385 and BS 8000.