Details

Autor(en) / Beteiligte

• Moropoulou, A.
• Karoglou, M.
• Giakoumaki, A.
• Krokida, M.K.
• Maroulis, Z.B.
• Saravacos, G.D.

Titel

Drying kinetics of some building materials

Ist Teil von

• Brazilian journal of chemical engineering, 2005-06, Vol.22 (2), p.203-208

Ort / Verlag

Brazilian Society of Chemical Engineering

Erscheinungsjahr

2005

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• Moisture is one of the most deteriorating factors of buildings. The deteriorating effect of moisture occurs mainly during the drying phase, and not in the wetting phase. Appropriate parameters of the drying kinetics are required for the building materials. Environmental factors, such as air temperature, air humidity, and air velocity affect drying. An experimental air dryer of controlled drying air conditions was used to investigate the drying performance of 4 stone materials, 2 bricks and 7 plasters. Drying kinetics was examined at 4 air temperatures, 6 air humidities, and 3 air velocities. A first-order kinetics model was obtained, in which the drying time constant was a function of the drying conditions, and the equilibrium material moisture content was described by the Oswin equation. The parameters of the proposed model were found to be affected strongly by the material and the drying air conditions. The results obtained are very useful in selecting the appropriate plaster to protect existing historic buildings.