Technical data sheet ASO®-DMB Binder for Trass drainage mortar
Material number
Package type
Colour
Units / pallet
Pc/package
207209001
20 kg, bag
Grey
48
1
Areas of application As binder for the creation of drainage screeds and bedding layers Suitable for usage categories N1 and N2 in accordance with ZTV Wegebau [Additional Tech. Contractual Conditions for Construction of Paths & Squares Outside of Road Traffic Areas] for binding aggregates with aggregate size of 1 - 5 mm For exterior
Product features Cementitious binder Containing Trass Quality up to CT-C20-F5 in accordance with DIN EN 13813
Advantages High frost and thaw resistance Containing Trass, reduces efflorescence Water permeable Machine processable
SCHOMBURG GmbH & Co. KG · Aquafinstr. 2–8 · D-32760 Detmold (Germany) · Tel. +49-5231-953-00 · Fax +49-5231- 953-333 · schomburg.com 1/3
07/01/2026
Technical data sheet ASO®-DMB Technical Data Material properties Special cement Powdered
Base material Consistency
Mixing approx. 3 weight proportion approx. 2 - 3 minutes approx. 5.5 l - 5.8 l at 20 kg
Mix ratio, aggregate Mixing time Water addition
Application Substrate temperature Pot life Consumption pro m² and cm layer thickness Mixing method, machines, tools
Foot traffic after Ready for covering with tiles Application temperature Hardening time / full resilience Layer thicknesses
approx. 5 - 25 °C approx. 60 minutes approx. 4.1 kg/m² Forced paddle mixer Free fall mixer Continuous mixer Screeding machine approx. 24 hours approx. 24 hours approx. 5 - 25 °C approx. 7 days approx. 50 - 120 mm
Material rate Grading curve and aggregate size Aggregate size
Grading curve
Mix ratio by weight fraction
Quartz sand
1-4 mm
1:3
2-5 mm
Gravel
Moraine
All values given in the TM apply at +23°C and 50% relative humidity.
Minimum nominal thickness Terraces, balconies, loggias, arcades or walkways Do not drive on
Layer thickness min. 50 mm
Drive on
Min. 50 mm on based bound layer (e.g. concrete slab)
Min. 100 millimeters on unbound base layer (e.g. compacted gravel)
Application Mixing recommendations for mixing and conveying machines 1. Fill the mixing drum halfway with the aggregate, the binder ASO®-DMB and the mixing water. 2. Then add the remaining aggregate. 3. The total mixing time is ca. 2 - 3 minutes. 4. The wet drainage mortar must be protected from drying out too quickly, e.g. due to heat or draughts.
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Technical data sheet ASO®-DMB Application 1. Distribute and compact the drainage mortar onto the prepared substrate. 2. Apply drainage mortar evenly and at a gradient of at least 1.5%. 3. Limit field sizes to a maximum field length of 6 m using bay sizing joints. Compact field sizes with a ratio of 2:3 are desirable. 4. Apply MONOFLEX, MONOFLEX-XL or UNIFIX-S3 to the back of slabs using an 8-10 mm notched trowel and lay them on the still fresh drainage mortar. 5. Alternatively, after approximately 24 hours, tile and slab coverings can be laid on the hardened drainage mortar using the buttering method with MONOFLEX, MONOFLEX-XL or UNIFIX-S3. 6. Create the joints between the tiles with a minimum joint width of 3 mm and, after the tile adhesive has become ready for grouting, seal them with a drainage-capable CRISTALLFUGE-DF or CRISTALLFUGE-HF cement-based sealant.
Cleaning tools Clean tools thoroughly with water after use.
Storage conditions Storage Store in a cool and dry place. Min. 12 months in the original canister. Promptly use opened container.
Notes Do not add any additives and substances! Observe the technical data sheets of the products mentioned before starting work. Low temperatures, high humidity and heavy layer thicknesses delay hardening, drying and extend the time until ready to receive tiles. (Also see the BEB data sheet “Building climate preconditions for drying screeds”). Tests showed that the crystalline binding of the water is slower at low temperatures (+5 to +10°C), meaning that the screed was only ready to receive tiles after a longer period of time! The quality of the aggregate used is partly decisive for the properties of the mortar produced with it. If aggregates with a different grading curve and grain size are selected, the properties change. Do not add any other cement or binder! Border, field, building separation and movement joints should be carried over to or installed at the designated location; suitable means (e.g. edge strips) should be used to detach them! The installation location must be ventilated. However, draughts and direct solar radiation should be avoided during application and the hardening process. The indoor temperature and floor temperature must be at least +5°C during application, and during the following week! Air dehumidifiers may not be used during the first 3 days! If moisture rises from the substrate, effective waterproofing is essential prior to laying the screed! This does not apply in conjunction with coatings in the drainage mortar on an unbound cementitious base layer. When laying on a bonded base layer (e.g. concrete) or waterproofing, the substrate must be created with adequate falls and be level to prevent waterlogging.
Relevant regulations Planning, inspection of substrates and building site circumstances, laying, grouting and subsequent care of the work must be done in accordance with the relevant DIN standards and recognised rules of technology (e.g. the ZDB Data sheets of the Zentralverband Deutsches Baugewerbe e.V.(German construction Association) in the latest version. Observe applicable safety data sheet!
The rights of the buyer with regard to the quality of our materials are based on our terms and conditions of sale and delivery. Our technical advice team will be happy to advise you in the case of requirements that exceed the scope of the application described here. In order to be binding, a legally binding written confirmation is required. The product description does not release the user from a duty of care. Lay a test area in the event of uncertainty. This version becomes invalid in the event of a new version being issued.
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