Desalination and refurbishment plastering of brickwork

A major problem is also presented for buildings of an older construction form is the loading caused by easily soluble construction damaging salts. It is generally compounds from sulphates, chlorides as well as nitrate being dealt with here. A salt loaded building component has increased basic moisture (hygroscopic equalization moisture). Whereby sulphate and chloride compounds can be chemically transformed at least in surface proximity into compounds that are difficult to dissolve (salt conversion) nitrate present a far more difficult problem. Desalination of any brickwork can be implemented with compresses (cellulose compresses) or sacrificial plastering.  A further or additional measure is created with refurbishment plastering as per the WTA instruction leaflet 2-2-91. The crystallizing salts are stored in the air pores of the plaster that is a minimum 20 mm thickness and cannot any longer reach the external brickwork surface until the plaster is saturated.


Brickwork (to the left) damaged by construction damaging salts and a moistured base (to the right)
Brickwork (to the left) damaged by construction damaging salts and a moistured base (to the right)


References

 

 

  • Stadtbibliothek Erfurt
  • ZEV Bahnhofstraße 4/ Stiftstraße
  • Schule Montabaur
  • Kindertagesstätte Pöhlau
  • Preußisches Viertel Dresden
  • Bergakademie Freiberg, Ledebur Bau
  • MFH Walter-Rathenau-Straße 40a, Zwickau
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