THE PROBLEM

The degradation mechanism due to saline efflorescences is due to the crystallization pressure of some salts, which have the characteristic of greatly increasing their volume during the transition to the solid phase, following the evaporation of the solvent; the pressures caused within the pores are such that exceed the material’s resilience and the result is the continuous erosion and disintegration of the surface layers of materials, causing fragmentation and in extreme cases pulverization of the stone.

Several saline compounds can be found, in the form of watery solutions, inside the masonry, coming from the ground (especially Nitrates and Chlorides) or from the deposition of aerosols present in the atmosphere (Chlorides and Sulfates), or from the same material used for construction (Sulfates) or from localized infiltration.

THE SOLUTION

The decisive and conservative intervention of the problem, provides for the complete removal of the efflorescences present on the surface and if possible also the extraction of salts within the same materials. Furthermore, it is essential to solve the causes that produce the crystallization of salts with targeted and definitive interventions.

In the event that the salt problem is mainly caused by the interaction between material and the external environment, after cleaning operations it is necessary to make the affected surfaces water-repellent in order to keep the salts in solution within the materials, thus avoiding their crystallization in the outside.

OUR PRODUCTS

INTERVENTION CYCLE

1

Dry brush the surfaces affected by efflorescences

2

If necessary, apply ESTRATTORE DI SALI

3

Complete the removal of salts with PULI AC

4

Apply, on a clean and dry surface, the ANTISALI A protective

CIR PRODUCTS STRONG POINTS

Broad spectrum of action on all types of salts
They do not alter the porosity of the supports
They do not leave deposits of harmful by-products
Protective with high water-repellent capabilities

OUR TECHNICIAN RECOMMENDS

In order to carry out a resolutive intervention of the problem it is necessary to analyze and address the root cause that lead the salts to come out.