In concrete products in general and in those placed below the level of the ground level or in the vicinity of aquifers, in particular a constructive detail, moreover indispensable, such as the formwork spacer made up of iron rods, usually about 8 mm in diameter, constitutes a dangerous element of discontinuity, permeation and infiltration.
In fact, the water is located at the concrete-spacer interface, a place for differential shrinkage and frequent crawl spaces, an easy way of access and infiltration capable of seriously affecting the hermetic seal of the building.
The special characteristics of the Azichem hydro-expansive rubbers allow the protection to be extended to this true and constructive “Achilles heel”, through water-tight devices that are both easy to manufacture and economically advantageous, consisting of organically functional systems: the RINGSEAL IR-08 hydro-expansive gaskets.
Ringseal IR 08
Ringseal IR 08 is a ring gasket in special hydro-expansive rubber that reacts upon contact with water, increasing its initial volume. Used in combination with an 8-mm diameter iron formwork spacer (rebar), Ringseal IR 08 hermetically seals any conduit discontinuities that could easily form in the concrete due to the presence of the spacer and which would compromise the waterproofing of the masonry itself. The hydroexpansive capacity of Ringseal IR 08 has been laboratory tested with three different types of water: demineralised, salt and with a highly basic pH (to simulate conditions in contact with concrete). The expansion tests showed a variation in volume ranging from a minimum of around 200% with salt water (three times the initial volume) to a maximum of over 900% with demineralised water.
Ringseal IR 08
Ringseal IR 08 is a ring gasket in special hydro-expansive rubber that reacts upon contact with water, increasing its initial volume. Used in combination with an 8-mm diameter iron formwork spacer (rebar), Ringseal IR 08 hermetically seals any conduit discontinuities that could easily form in the concrete due to the presence of the spacer and which would compromise the waterproofing of the masonry itself. The hydroexpansive capacity of Ringseal IR 08 has been laboratory tested with three different types of water: demineralised, salt and with a highly basic pH (to simulate conditions in contact with concrete). The expansion tests showed a variation in volume ranging from a minimum of around 200% with salt water (three times the initial volume) to a maximum of over 900% with demineralised water.