This is the area in which the wide experience in the anticorrosion has been of outmost importance in the transfer of technologies to an apparently less advanced field.

The deteriorated concrete rehabilitation can be summarized in:

1.       Removal of the deteriorated portions.

2.       Removal of the potentially damaging areas.

3.       Achieving of an adequate substrate for the following protection.

4.              Corrosion protection of the exposed re-bars.

5.              Reconstruction of the missing re-bar cover.

6.              Application of adequate structural elements (re-bars or carbon fiber) in order to reinstate the original load bearing capacity.

7.       Creation of a new cortical protection layer.

We have been restoring and protecting concrete for over twenty years, sucessfully completing all kinds of jobs.

Our surface preparation experiences range from the manual or mechanical methods, to dry and wet blasting ,to the technologically more up to date high pressure and ultra high pressure water jetting.

Water demolition with ultra high water jetting (above 1.500 bar – 20.000 psi)

The removal of deteriorated area is achieved  by means of only water at pressures above 1.500 bar – 20.000 psi, and limited water flow, in order to be able to manually direct the jet stream.

The demolition mechanism is obtained by the almost instantaneous removal of the cement paste. The water jet stream acts like a sharp tool, that engraves the concrete proportionally to the water flow, the pressure and the time of contact. The higher the distance of the nozzle from the surface and the tangential speed of the rotating head, the lesser is the removal action.

The required pressure at the nozzle must be at least four times the compression resistance of the concrete that must be removed (therefore a minimum of 1.800 bar).

Being able to manually direct the nozzle, gives the great advantage of selecting the time and distance of the tool and to locally verify the pH of the substrate with a phenolphthalein solution, and give the needed extra care to critical areas such as beams and knots.

This kind of technology allows to reach a sound concrete core with a roughness that can be selected in a range from half to more than one centimeter, giving the optimum adhesion substrates for the subsequent mortars.

The advantages of this technology can be summarized in a much better quality of the surface preparation, and therefore durability of the reconstruction, and in a much more environmental friendly operation.

 Our company owns a number of these ultra high pressure diesel pumps and, for specially critical jobs can rely on the consulting of a professor at Milan’s Politecnico.