Drainage mortar
Water-permeable | Safety in the system | High load-bearing capacity | Trass additives reduce efflorescence
The frost-resistant drainage mortars are the perfect combination with our pavement jointing mortar. The system with the guarantee.
The quality and stability of a paved surface depends largely on the choice and use of the right bedding material or drainage mortar. ROMEX® offers you high-quality special products for this purpose, such as ROMPOX® - TRASS BED and ROMPOX® - ADHESION ELUTRIANT. They guarantee an effective and drainable bedding and, in combination with ROMEX® paving joint mortars, offer a permanent solution against frequent paving damage such as rutting, settlement and displacement. The use of these products in accordance with the regulations ZTV Wegebau and VOB Part C not only ensures the dimensional stability and force transmission of the paved surface, but also allows you to take advantage of our ROMEX® SYSTEM GUARANTEE. Our ROMEX® bedding products are suitable for various construction methods and ensure proper and permanently stable paving.
Trass bedding products
ROMPOX® - 303 CEM-TC
Bindemittel zur Herstellung eines frostbeständigen und drainfähigen Trass-Bettungsmörtels
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ROMPOX® - 302 CEM-TB
Verarbeitungsfertiger, frostbeständiger und drainfähiger Trass-Bettungsmörtel
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ROMPOX® - 304 CEM-HS
Kunststoffmodifizierte, trasshaltige Haftschlämme zur Verlegung von Pflaster- und Plattenbelägen
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For all paving and slab coverings made of natural and concrete stone as well as ceramics
The German guideline ZTV-Wegebau describes all common construction methods for paving and slab coverings for non-public areas and is of great importance for the paving contractor, as it regulates all designs for private clients. The permissible construction methods described therein include the fully bonded construction method and the mixed construction method with bonded bedding for surfaces that are walked on and for surfaces that are driven on with vehicles weighing up to 3.5 tons. Ceramic slabs in use category N1 (pedestrians only) with a nominal thickness of less than 3 cm must also be laid in bonded bedding and with a fixed joint.
Our high-quality trass bedding mortars are used in the fully bonded construction method and the mixed construction method with bonded bedding. These include ROMPOX® - 302 CEM-TB, a ready-mixed bedding mortar that is only mixed with water, and ROMPOX® - 303 CEM-TC, a compound for producing a bedding mortar, as a more cost-effective alternative for larger construction projects. Both variants are highly permeable to water. This means that, on the one hand, water and moisture cannot rise capillary in the bedding layer and, on the other hand, water that penetrates the surface is drained downwards.
The trass mineral it contains binds lime particles from the Portland cement and neutralizes them. The great advantage is that the risk of waterlogging, efflorescence and discoloration is greatly reduced compared to conventional Portland cement products without trass minerals. Our polymer-modified adhesion elutriant (thin set) ROMPOX® - 304 CEM-HS is used as a bonding agent between the bedding and the stone. The final step is one of our pavement jointing mortars that meets the requirements.
This system, which has been tried and tested for decades, forms the basis of our RSG. With the professional installation of these products, you can create a durable, permanently functional surface and also benefit from our system guarantee.
ROMEX®-RSG – Quality brings safety
When laid professionally in accordance with the German ZTV Road Construction Guideline and with our ROMEX® system of bedding mortar, bonding slurry and pavement jointing mortar, we offer a 10-year guarantee on the construction work. In this way, we double the statutory guarantee of five years for Contractors and specialist companies. The ROMEX® SYSTEM GUARANTEE therefore offers real added value for every Contractor and means security for clients, planners and specialist companies.
ROMEX® is the first and only manufacturer in the paving and slab construction sector to offer its customers such a guarantee, which goes beyond the statutory warranty. Another advantage: the guarantee applies not only to private projects, but also in the public sector.
Trend theme ceramics
Laying 2 cm thick ceramic patio tiles
The professional laying of ceramic slabs less than 2 cm thick is not regulated in Germany and is not a recognized technical rule. According to the German ZTV guidelines, ceramic slabs with a slab thickness of 2 cm are only approved for use category N1 (pedestrians only). For N2 (vehicle load up to 3.5 t), the nominal thickness of the tile must be at least 3 cm. The tiles must be sufficiently slip-resistant (at least R10) and must not exceed a length-to-width ratio of 3 to 1.
Permissible construction methods in usage category 1 (pedestrians):
- Fully bound construction method
- Mixed construction with bound bedding and fixed joint
- The maximum length of the slab must not exceed a nominal dimension of 100 cm
Technical information
Water permeability
To ensure good water permeability in the bonded construction method, it should always be avoided that the ROMPOX® - CEM 304-HS adhesion elutriant (thin set) “swells out” on the stone/slab side during installation. As an adhesive and bonding agent, it is impermeable to water and would therefore seal the joint at these points. This can be avoided by scraping off the adhesive elutriant approx. 5 cm from the edge of the stone or slab, e.g. with a trowel.
Expansion joints in the bonded construction method
Expansion joints, especially at bordering structures, are essential to absorb stresses in the bonded construction method. These stresses are caused by various factors such as temperature fluctuations, the absorption and release of moisture, material shrinkage and vertical stresses due to load transfer. Without suitable expansion joints, such stresses could lead to cracks and damage to the building substance.
Wie ist der Oberbau anzulegen?
Das lässt sich nicht pauschal zu beantworten. Das hängt in allererster Linie von der Nutzung der Fläche ab. Wird die Fläche ausschließlich begangen oder gelegentlich befahren oder wird die Fläche dauerhaft schwer belastet. Hinzu kommen äußere Gegebenheiten wie die Frostschutzzonen oder der zu verlegende Belag bzw. die Dicke des Belagmaterials.
Grundsätzlich lässt sich aber festhalten, dass der Oberbau in gebundener Bauweise immer aus einer entsprechend zu dimensionierenden Tragschicht, Schottertragschicht oder Dränbeton, einer Bettung und einer gebundenen Fuge besteht.
Gerne beantworten wir diese Frage im persönlichen Gespräch anhand ihres konkreten Bauprojekts.
Wie hoch muss die Bettung sein?
Man kann vereinfacht sagen, dass die Bettung in gebundener Bauweise laut ZTV und DIN 18318 im Mittel 5 cm betragen muss.
Grundsätzlich lässt sich das aber nicht pauschal beantworten. Die Höhe bzw. Dicke der Bettung hängt von der Nutzung der Fläche sowie dem Belagsmaterial ab. Gerne beantworten wir diese Frage im persönlichen Gespräch anhand ihres konkreten Bauprojekts.
