What is impact resistant carbon fiber
Wherever the facade plinth is permanently exposed to strong mechanical loads, especially at the entrance, clear scratches, abrasion or impact marks can often be found shortly after completion or renovation of the building. An annoying and costly finding that is actually predictable, because the facade is stressed not only by climatic fluctuations, but also by leaning bicycles, flying balls, moves, kicks or other mechanical influences, especially at the base. The damage and soiling that occurs in this way is not only unsightly, it also affects the functionality of the facade in the medium term. For example, as a result of abrasion, moisture or frost can penetrate the masonry and cause considerable damage to the building fabric over time. The installation of special protection systems for the facade plinth is therefore a sensible investment. These sustainably increase the impact and abrasion resistance of the surfaces and thus create the basis for significantly longer renovation cycles.
Effective protection for plastered facades
New technical solutions are increasingly displacing the more complex to process systems with conventional base protection plates. In particular, modern carbon technology with carbon fibers opens up new possibilities for significantly increasing the impact and shock resistance of facade surfaces. For example, the Alprotect Carbon facade insulation system from alsecco is based on an organic reinforcement compound reinforced with carbon fibers. In combination with a fabric, the system solution already offers very effective protection for mechanically heavily stressed and therefore particularly critical facade sections. The surfaces of the system can withstand loads of up to 60 joules, depending on the design.
Robust natural stone base
A particularly effective solution for protecting facade plinths is cladding with natural stone panels. With modern special molded parts for reveals, corners and cornices, various technical and design requirements can be safely met. For example, the Alprotect Stone XL modular system is suitable for creating both flush and offset plinths. The system consists of shock-resistant, up to 0.72 m2 large slabs made up of 8 to 10 mm thin slabs of natural stone and around 16 mm thick lightweight concrete beams. Both elements are glued together to form a sandwich element at the factory. Depending on the design, several types of natural stone can be applied to the lightweight concrete support at the same time. The system can be implemented with types of stone such as sandstone, limestone, marble or granite.
The panels are processed on the construction site with a two-component laying mortar, with which the individual panels are glued to the ETICS system that was previously dowelled through the fabric. As an additional safeguard for the sandwich elements, a fastening point with a screw thread is inserted on the back, a retaining strap is attached and anchored to the wall former at the other end. A selection of shaped and connecting parts also enables difficult details to be created, such as finishing cornices or internal cornice corners. Monolithic corner views can be designed with special visible edges that completely conceal the lightweight concrete beam on the front side.
Base in exposed aggregate concrete look
Another unconventional solution for heavily used facades is the Spar Dash system concept. It consists of two components - a special carrier layer and a rock mixture that is thrown into the carrier mixture directly on site. The result is an extraordinarily impact-resistant and shock-resistant surface that is very dirt-resistant and weatherproof at the same time. The system harmonises well with the exposed aggregate concrete look of numerous large housing estates from the 1960s and 70s. Depending on the grain size, the applied reinforcement consists of a 5 to 9 mm thick carrier layer made of Spar Dash Receiver, in which a glass fiber fabric is embedded. After this reinforcement layer has dried, a second layer of receiver is applied and the rock mixture is thrown into the still moist carrier layer with a shovel. Finally, the stones are pressed lightly with a float.
Which of the methods described above is selected to protect the base of an ETICS system from mechanical damage depends on the type of building and the associated desired appearance. In any case, the use of plinth protection systems significantly extends the service life and thus the time interval between the renovation cycles of the facade surfaces.
From Ingo Seligmann
An organic reinforcement compound reinforced with carbon fibers makes the plaster impact-resistant
8 to 10 mm thin natural stone panels on 16 mm thick lightweight concrete protect the base
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