Italy

Waterproofing of tanks in wastewater treatment plants

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The Rozzano wastewater treatment tanks of the Rozzano wastewater treatment plant are made of the waterproof structure Drytech White Tank.

The waterproofing of tanks in wastewater treatment plants presents a double challenge for watertight systems.

This type of structure must in fact guarantee double impermeability: to the external water table and, obviously, to the water treated inside the tank.

The Rozzano Purification Plant is also located on a narrow strip of land between the southern course of the Lambro river on one side and a canal on the other, in the south-east area of ​​the Smeraldino Oasis.

So the theme of the watertightness of the work is, if possible, even more sensitive due to the environmental implications.

Made by the Intesa Costruzioni company in collaboration with Drytech, the new purification tank was built in just 120 days with the Drytech Tank system.

The waterproof concrete was formulated by Drytech Engineering based on the characteristics of the system chosen by the construction company, with the aim of ensuring, in addition to watertightness, chemical resistance to urban waste.

Similar resistance is obviously required for DRYflex resin, which, being expanding, waterproofs joints, cracks and crossings by pressure.

The resin is injected along the entire thickness of the structure, so it opposes the water with a corresponding barrier.

Furthermore, the compatibility of DRYflex with drinking water – certified by compliance with BS 6920-1: 2000 – allows for guaranteed use in structures in contact with drinking water.

The new tank of the Rozzano Purification Plant, which came into operation in February 2019, has a capacity of 1,700 m³ and treats a maximum flow rate of 360 m³ / h.

Ownership: CAP Holding SpA, Assago

Progetto: Ing. Marco Callerio di CAP Holding, Assago

Struttura: Ing. Bernardo Vanelli, Castelleone

Costruzione: Intesa Costruzioni, Treviolo

Drytech Tank: 1,100 m²

Waterproofing Hospital

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The new Sant'Anna hospital in Como is located on an area of ​​over 80,000 m² south of the city of Como and a few hundred meters from the headquarters of Drytech Italia.

The choice of the Drytech Tank as the waterproofing system for the Sant’Anna Hospital in Como ensured a significant reduction of work days in the overall site budget, thanks to the construction characteristics and organisation of the Drytech system.

The activities of the Drytech Tank are in fact parallel to the other activities of the site, so that the waterproofing item has been removed from the work schedule.

The Como Polyclinic has two underground floors exposed to a 2-meter flap, which will also house the operating theaters.

To support the weight of the structure, the site of the construction site was consolidated with approximately 4000 reinforced concrete poles, with a depth varying between 20 and 30 meters.

The poles were thrown into shirts driven into the ground with micro-explosions.

Contractor: Infrastrutture Lombarde

Project: Euro-Project

Structure: Eng. Franco Mola, Milan

Construction: Consorzio S.AN.CO

Waterproofing of a residential complex in contact with the sea

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The conversion of the industrial port area, west of the Genoa airport, also involves the construction of the Borgo alla Marina residential complex.

The Drytech Tank was chosen for the waterproofing of a large residential complex in direct contact with the sea.

When construction was complete, the waterproofing of the underwater level was tested by flooding the site perimeter.

After checking the watertightness of the Drytech Tank, the structure was launched by removing the sheet piling.

The conversion of the industrial port area, west of the Genoa airport, also involves the construction of the Borgo alla Marina residential complex.

200 prestigious apartments, with relative berths and garage, overlooking a new tourist port.

Below the buildings and the square, in direct contact with the sea water, is the covered parking area for residents.

Project: Studio Gnudi, Genova

Contractor: Aurora Costruzioni, Milano

Waterproofing the thermal plant

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The residential center La Città sul Mare in Savona, in fact, heats up in winter and cools down in summer by exploiting the sea temperature.

The Drytech Tank waterproofing system was used for the sea inlet of the Città del Mare’s thermal plant, as well as for the two floors of the underground car park, which is exposed to a 5-metre water table, as can be seen from the jet pressure coming out of the pump shaft in the third picture.

The residential center La Città sul Mare in Savona, in fact, heats up in winter and cools down in summer by exploiting the sea temperature.

Excellent news for the sky arrives from the sea.

The plant is zero-emission and, using a renewable and free resource, provides a definitive solution to the problems of atmospheric pollution and the soaring costs of fossil energy sources.

The Savonate housing complex was built by Meraviglia Spa of Bulgarogrosso (CO) and was designed by the Technion Srl and Ellevi di Lecco design studios.

The 120 apartments are served by a heating system connected to a sea outlet, built on the boulder pier facing the complex.

The basic principle of the system is the substantially constant temperature of the sea water (about 18 ° in this stretch of coast).

The pipes of the heating and air conditioning system from the building run underground to the sea intake, where the heat pump is located, which uses sea water as a source or as a heat sink.

The transport of thermal energy takes place through the same water. Water that is sucked from the sea, brought up to the heat exchanger and, therefore, released.

The system has a positive energy balance: it supplies more energy (heat) than electricity needed for its operation (the ratio is at least 1 to 4 or higher, up to 1 to 6).

Structure: Technion and Ellevi, Lecco

Construction: IMM, Milano