Paving stones not only look beautiful – they also provide an impression of durability and stability. To ensure that this impression is not false, they must be laid according to the requirements – with materials that can also meet these requirements over a longer period of time. PCI Augsburg GmbH therefore offers professional workers in garden and landscape construction a mature product range of cement-based joint grout mortars that can withstand even permanent stresses due to heavy road traffic. And permanently – as demonstratively shown in various successfully completed projects.
Today, the so-called loose construction method is still used most frequently in paving construction. This configuration is based on loose materials from the base layer to the grout material. The paving stones or paving sets are embedded into a loose gravel bed and then grouted with sand. The disadvantage of loose grouting: The suction action of rolling wheels and environmental influences can rapidly wash away loose grouting. Cleaning and servicing work such as the removal of moss and weeds, and renewed brushing in of crushed sand into the joints are therefore essential for this type of construction.
A good base: the close bonding of grout mortar and paving
A bonded construction, in combination with cement-based joint grout mortar, cannot normally be affected by even high axle loads or defrosting agents. Noise stress is also lower in the case of joint grouting at paving level compared to loosely laid paving stones. In contrast to drainable, water-permeable joints, cement-based, water-impermeable joints are characterised by the close bonding of grout mortar and paving stones. The resulting dense and uniform joint profile is resistant to extreme loading at high travelling speeds and strong rainfall. A stable base layer is made of layers of water-permeable drainage concrete or asphalt. Only this ensures that water can flow away and not build up. "Because the subsequent bedding mortar needs to remain water-permeable, we always recommend using a cement-based, surface-sealing joint grout mortar, for instance PCI Pavifix CEM, for extreme loading. Rainwater usually then rapidly runs off from the surface to the canalisation", explained Oliver Marek. The cement-based joint grout mortar has proven to be reliable and extremely long-lasting in paved areas subject to extreme stress, e.g. roundabouts, traffic islands, bus bays and drainage channels.
Historic granite slabs laid for the future
It is easy to demonstrate how durable cement-based joints can be by looking at the paving in various historical old towns.
One example is the Saxon town of Meissen. Every year, the local historical town centre is visited by thousands of tourists as it is one of the numerous famous sights in this town. Solid and safe pathways are required for the visitors to reach this and all the other attractions in Meissen. 200 m² paving was relaid to ensure this in the pedestrian area of the Marktgasse. The historical granite slabs that were already present were reused in combination with the joint grout mortar PCI Pavifix CEM. "This cement-based mortar has proven itself particularly for grouting natural stone paving in areas with heavy traffic loads", confirmed Oliver Marek, construction products manager at PCI. No damage has yet occurred eight years on from the completion of the paving area in Meissen. The requirements of the community have therefore been met in full: The cement-based joint grouts result in low maintenance costs and also make frequent cleaning with a sweeper machine possible. At the same time, this processing variant with uniform and securely sealed joints ensures that the area can be safety walked upon – even with high heels", said the specialist.
The Marktgasse lies in the historic centre of the Saxon town Meissen. 200 m² of paving were relaid here. The historical granite slabs that were already present were used together with – due to the heavy loading – the cement-based joint grout mortar PCI Pavifix CEM.
In the old town of Meissen, the traffic walks and drives exclusively over historical granite slabs and paved areas. The pavements are primarily made of granite slabs and cobble stones, while the roads and squares are mainly made of large format paving stones made of red Meissen granite or other hard stones from the locality.
The cement-based, water-impermeable joints are characterised by the close bonding of joint grout mortar and paving stones. The resulting dense and uniform joint profile is resistant to extreme loading at high travelling speeds, strong rainfall and cleaning operations with a high-pressure cleaner.
Major building site, Ville de Metz, Paris: The cement-based joint grout mortar PCI Pavifix CEM was the right choice to make the 4,000 m² paving area permanently resilient.
When strong forces act on the paved surfaces, then a bonded construction, in combination with a cement-based joint grout mortar such as e.g. PCI Pavifix CEM, is particularly suitable. This type of construction has proven to be reliable and extremely long-lasting in paved areas subject to extreme stress, e.g. roundabouts, traffic islands, bus bays and drainage channels.