For this type of hydraulic work – WWTP’s in a Lagoon system, we also recommend the use of APP polymer bitumen membranes for the reasons already mentioned in the previous point.
The waterproofing system consists of an APP polymer bitumen membrane, with a mass of 4 kg/m2, reinforced with 150 g/m2 polyester reinforcement (which gives this type of material excellent mechanical resistance) and finished on both sides with a polyethylene film.
This membrane is available in rolls of 1×10 m and its commercial name is POLYSTER 40 .

The main advantages of this type of material have already been listed in the previous point, but we should add the following:

– The bituminous mass, at a minimum of 4.0 kg/m2, allows for application on the soil, with good mechanical resistance to the solicitations/efforts to which it will be subjected;

– This type of material can be placed directly on the soil without the need for concrete structures.

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