Waterproofing Bridges and viaducts. Interventions on waterproofing horizontal surfaces and vertical structures.

Waterproofing horizontal surfaces

The lean concrete of the foundations is cleaned and dried. After placing the reinforcement bars, the capillary penetrating osmotic cement X-tra is applied as 1,2 kg/mq and it is quickly covered with the raft casting. Once X-tra has set, the surfaces must be kept humid for 3 days.





Waterproofing vertical walls

Mechanically remove all the concrete defects (gravel nests, flashing, incoherent parts, spacers, wood, etc.). In the corners between the raft and the ribs, in correspondence of the construction joints, realize a channel with 25 x 25 mm minimum dimensions.
Repair and fill the concrete defects with a hand of the capillary penetration osmotic cement X-tra in grout form and subsequently close with non-shrinking waterproof CR 45 RS, resistant to sulphates. In the demolished parts, apply a hand of X-tra and subsequently realize a shell joint with the non-shrinking waterproof CR 45 RS. The capillary system of the concrete is opened by pressure washing (220 - 250 atm) on the surface. Wet the surface to waterproof until rejection and then eliminate the excess water.



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