What is in ardex A35?
Ardex A35 Mix Pre-Blended Rapid Drying Cement for Internal Screeds incorporates Ardex A 35 cement and graded sand. After a day, it will also exceed the acceptable minimum compressive and tensile bending strengths attained by ordinary cement screeds after 28 days.
How do you mix ardex A35?
Using a 1:5 mix, material requirement is approximately 0.31kg of ARDEX A 35 per m2 per millimetre of screed thickness i.e. approximately 3.2m2 at 25mm thick or 5.4m2 at 15mm thick per bag. For slurry bonding, allow an extra 2 x 25kg ARDEX A 35 cement and 3 x 5kg of ARDEX P 51 bonding agent per 100m2.
What is ardex screed?
ARDEX Fast Track Screed Cements incorporate ‘RAPIDRY FORMULA’ Technology, binding the water used for mixing within the cement, ensuring rapid drying, minimum shrinkage and rapid strength development, regardless of thickness.
What is the grade of screed concrete?
A floor screed is usually a cementitious material made from a 1:3 or 1:4.5 ratio of cement to sharp sand.
What is screed in flooring?
Screed is a thinner layer of concrete which s typically poured over a base floor to help form a smooth floor coating to provide a strong foundation for the top floor.
How long does it take for 25mm screed to dry?
Screed Setting and Drying Times
|Product||Typical Setting Time||Typical Drying Time|
|K-screed (1:4)||6 – 12 hours||25mm per week|
|Mapei Topcem (1:6) Including Tarmac Cem5||6 – 24 hours||5 days|
|Flowing screeds – Gyvlon / Supaflo etc||6 – 48 hours||1mm per day|
|Granolithic screeds||12 – 28 hours||2mm per day|
What is an anhydrite screed?
Anhydrite screeds are a mixture of screeding sand and binder. If tilers are unsure of whether the screed they’re to work on is, or isn’t, anhydrite, they should always ask. Information about the screed should be kept in the building owner’s Operation and Maintenance Manual. Movement Joints.
What is the minimum screed thickness?
The minimum thickness of an unbonded traditional screed will usually be around 50mm. An unbonded Cemfloor Screed would usually require a minimum of 30mm thickness. Floating screed: This is where the screed is overlaid on something that is compressible and not rigid.
Is floor screed necessary?
Screeds are required when a colourful or functional floor is needed rather than a bare concrete surface. For industrial purposes, or commercial locations, which will undergo frequent traffic, a more robust screed is required than is used in DIY or residential projects.
Why do you have to screed a floor?
Floor screed is most commonly used to level out a concrete sub-base, especially when it is particularly uneven, as well as giving more tolerance in the application of sensitive floor finishes and supporting stress during the drying process.
How long does Screeding take to dry?
How long does it take for screed to dry? Depending on the type and thickness, it’ll take at least 24-48 hours to dry. If certain additives are used, the time could be reduced to just 12 hours!
Can you use Ardex a 35 for floating screeds?
Use ARDEX A 35 for bonded, unbonded and floating screeds in internal locations. The Speedy Moisture Tester (Carbide Method) must be used to test moisture. Please consult ARDEX Technical Services for further advice.
What can Ardex a 35 be used for?
ARDEX A 35 can be used to produce a bonded screed, unbonded floor screed laid onto a membrane, or floating floor screed laid onto a compressive quilt/insulating material. The Speedy Moisture Tester (Carbide Method) must be used to test moisture. Please consult ARDEX Technical Services for further advice.
How long does it take to dry Ardex floor screed?
ARDEX A 35 produces ultra-rapid drying floor screed which can be walked on after just 3 hours and floorcoverings installed in as little as 4 hours, regardless of thickness. Use ARDEX A 35 for bonded, unbonded and floating screeds in internal locations.
How much sand to mix with Ardex A35 cement?
Mix maximum 1 part by weight of ARDEX A35 cement to 4 or 5 parts screeding sand, depending on mix design. The screeding sand used should be good quality 0-8mm sand and, recommended by BS 8204-1: 2003+A1: 2009, classified to BS EN 1 3139 standards. Altern ativ ely, a fine 0 – 8mm aggregate with fines category 1 with range MP should be used.