The buffer is an expansion and joint joint made up of a modified elastomeric bitumen compound and basaltic inert compound, which is manufactured on site using a calcium process (± 25).
The binder used is a special mixture of bitumen, polymers and die formulates to ensure maximum elasticity of the finished product in the most diverse climatic and traffic conditions. It is available in different formulations that take into account the different contexts in which the finished product must be applied. The joint thus formulated is suitable to withstand sliding for 5 mm.
Thanks to its perfect coplanarity with the flooring adjacent to its uniform surface, it is particularly quiet to pass through and therefore indicated in urban environments in compliance with the directive of the Ministry of the Environment (Decr. 29 Nov 2000) and is flexible and completely watertight thanks to the insertion of a collection channel.
It may be partially or fully covered along its length when the road surface is being renewed. It is passable after about two hours from its completion.
In heavy traffic stretches, night work allows traffic to be reopened during the day.
In case of accidental damage it is simple and economical to repair.
It has very low costs compared to joints with the same characteristics.
The joint will be made at the installation site using a hot process and the existing pavement and/or joints will be cut, demolished and removed in the initial phase. The opening between the concrete structures must be thoroughly cleaned, removing debris along the entire length of the slab. The excavation, including the vertical faces of the asphalt, will be completely cleaned, dried and heated by means of a compressed hot air lance. After the application of the rainwater drainage system, between the opening of the two slabs, a sponge gum will be introduced to contain the bituminous binder, which will be laid on all sides of the excavation to ensure total impermeability. A galvanised sheet will be placed over the opening to prevent the aggregate from escaping during the construction of the joint and to better distribute the action of traffic; rubberised bituminous binder will be poured onto the sheet to complete the waterproofing. The heated aggregate is placed in the excavation in layers between 20 mm and 40 mm and each layer is immediately covered with the rubberized bituminous binder.
The last filling layer will be brought up to 20 - 25 mm below the level of the road pavement. The final layer of roofing, which will be built immediately after, will be composed of aggregate and bitumen mixed on site in a concrete mixer and then poured. To finish it will be compacted with a vibrating plate until it reaches the surrounding pavement level.
The bituminous binder must be poured onto the surface of the joint and applied in the quantity necessary to fill in the gaps in the top layer of the joint. The finished product is perfectly waterproof, in absolute coplanarity with the surrounding flooring and with a resistance that has been tested over time.