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Effect of Hydrophobization on Wetting, Drying and Salt Crystallization in Porous Materials

  • N. Shahidzadeh EMAIL logo
Veröffentlicht/Copyright: 13. Januar 2015
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Restoration of Buildings and Monuments
Aus der Zeitschrift Restoration of Buildings and Monuments Band 20 Heft 6

Abstract

We discuss the major role played by both the wetting properties of the porous material and the boundary conditions on the drying process. For hydrophobic materials, it will be shown how under some circumstances the evaporation rate becomes lower in the presence of an air flow over the surface than without an air flow, which at first sight seems counterintuitive. Furthermore, as hydrophobic treatment can facilitate the formation of liquid pockets, we discuss how entrapped sodium chloride solution can reach a high supersaturation before crystallization, contrary to what is commonly assumed for this salt. A consequence of such a high concentration is the very rapid growth of a single skeletal (Hopper) crystal, which can lead to damage.

Keywords : Hydrophobic surface; Sandstone; Crystallization; Sodium chloride; Evaporation.
Published Online: 2015-1-13
Published in Print: 2014-12-1

© 2015 Birkhäuser Verlag GmbH, Basel. Part of Walter de Gruyter GmbH, Berlin/Boston

Artikel in diesem Heft

  1. Masthead
  2. Personal Note of the Editor-in-chief
  3. Enhancement of Theory and Practice in Restoration and Renovation of Buildings and Monuments needs Attitude, Knowledge and Skill: Contribution of a Man and a Journal
  4. Editorial
  5. Effect of Hydrophobization on Wetting, Drying and Salt Crystallization in Porous Materials
  6. Evaluation of the Durability of Hydrophobic Treatments on Concrete Architectural Heritage
  7. Influences on the Hydrophobicity of Concrete Surfaces Treated with Alkyl Trialkoxysilanes
  8. Testing New Water Repellent Solutions to Protect Deteriorated Granite
  9. Innovative Nano-TiO2 Particles for Self-cleaning Treatments of Historic Architecture and Sculptures
  10. Adapting Hydrophobizing Impregnation Agents to the Object
  11. Life Cycle Cost Analysis on Impregnated Bridge Edge Beams
  12. New Books / Neuerscheinungen
  13. Calendar of Events / Veranstaltungskalender
  14. Masthead
  15. Personal Note of the Editor-in-chief
  16. Enhancement of Theory and Practice in Restoration and Renovation of Buildings and Monuments needs Attitude, Knowledge and Skill: Contribution of a Man and a Journal
  17. Editorial
  18. Effect of Hydrophobization on Wetting, Drying and Salt Crystallization in Porous Materials
  19. Evaluation of the Durability of Hydrophobic Treatments on Concrete Architectural Heritage
  20. Influences on the Hydrophobicity of Concrete Surfaces Treated with Alkyl Trialkoxysilanes
  21. Testing New Water Repellent Solutions to Protect Deteriorated Granite
  22. Innovative Nano-TiO2 Particles for Self-cleaning Treatments of Historic Architecture and Sculptures
  23. Adapting Hydrophobizing Impregnation Agents to the Object
  24. Life Cycle Cost Analysis on Impregnated Bridge Edge Beams
  25. New Books / Neuerscheinungen
  26. Calendar of Events / Veranstaltungskalender
https://doi.org/10.1515/rbm14.20.6-0037
Schlagwörter für diesen Artikel
Hydrophobic surface; Sandstone; Crystallization; Sodium chloride; Evaporation.

Artikel in diesem Heft

  1. Masthead
  2. Personal Note of the Editor-in-chief
  3. Enhancement of Theory and Practice in Restoration and Renovation of Buildings and Monuments needs Attitude, Knowledge and Skill: Contribution of a Man and a Journal
  4. Editorial
  5. Effect of Hydrophobization on Wetting, Drying and Salt Crystallization in Porous Materials
  6. Evaluation of the Durability of Hydrophobic Treatments on Concrete Architectural Heritage
  7. Influences on the Hydrophobicity of Concrete Surfaces Treated with Alkyl Trialkoxysilanes
  8. Testing New Water Repellent Solutions to Protect Deteriorated Granite
  9. Innovative Nano-TiO2 Particles for Self-cleaning Treatments of Historic Architecture and Sculptures
  10. Adapting Hydrophobizing Impregnation Agents to the Object
  11. Life Cycle Cost Analysis on Impregnated Bridge Edge Beams
  12. New Books / Neuerscheinungen
  13. Calendar of Events / Veranstaltungskalender
  14. Masthead
  15. Personal Note of the Editor-in-chief
  16. Enhancement of Theory and Practice in Restoration and Renovation of Buildings and Monuments needs Attitude, Knowledge and Skill: Contribution of a Man and a Journal
  17. Editorial
  18. Effect of Hydrophobization on Wetting, Drying and Salt Crystallization in Porous Materials
  19. Evaluation of the Durability of Hydrophobic Treatments on Concrete Architectural Heritage
  20. Influences on the Hydrophobicity of Concrete Surfaces Treated with Alkyl Trialkoxysilanes
  21. Testing New Water Repellent Solutions to Protect Deteriorated Granite
  22. Innovative Nano-TiO2 Particles for Self-cleaning Treatments of Historic Architecture and Sculptures
  23. Adapting Hydrophobizing Impregnation Agents to the Object
  24. Life Cycle Cost Analysis on Impregnated Bridge Edge Beams
  25. New Books / Neuerscheinungen
  26. Calendar of Events / Veranstaltungskalender
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