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Drying and Wetting of Building Materials and Components by J.M.P.Q. Delgado

By J.M.P.Q. Delgado

This publication, Drying and Wetting of creating fabrics and parts, presents a suite of modern contributions within the box of drying and wetting in porous construction materials.
The major advantage of the ebook is that it discusses the most vital themes regarding the drying and wetting approaches, particularly, techniques and traits in drying technology and know-how, drying mechanism and conception, apparatus, complex modelling, advanced simulation and experimentation. even as, those themes may be going to the come across of various medical and engineering disciplines.
The publication is split in different chapters that intend to be a resume of the present kingdom of data for advantage of expert colleagues.

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Extra info for Drying and Wetting of Building Materials and Components

Sample text

Most of the models attempt to model capillary moisture variations (Hall and Hoff 2002; Künzel 1995). 2) where, σ is the water surface tension, ϕ the contact angle of liquid–solid and n the fluid viscosity (Washburn 1921). In this work a simple first order kinetic model is proposed to predict the capillary rise height H as (Karoglou et al. 3) where, He is the equilibrium height and tc the capillary time height constant and He the moisture equilibrium height. The term of capillary height time constant tc is introduced for the first time and represents the time required for the waterfront of a material to reach 2/3 of the capillary moisture equilibrium height (He).

Build Environ 35(8):737–749 Chapter 2 Moisture Transfer Kinetics in Building Materials and Components: Modeling, Experimental Data, Simulation Antonia Moropoulou, Maria Karoglou, Asterios Bakolas, Magdalyni Krokida and Zacharias B. Maroulis Abstract Moisture is one of the most damaging factors of buildings. Masonries moisture content is defined by a delicate equilibrium established between the building and the environment. First order mathematical models can describe satisfactory phenomena like capillary rise and drying kinetics.

1 Microstructure Parameters Investigation For the study of materials microstructural characteristics mercury intrusion porosimetry is used. With the aid of this technique are estimated; total cumulative volume Vcum, specific surface s, average pore radius r, bulk density ρbulk, corrective bulk density ρbulkcor and total porosity εo (%). A. Moropoulou et al. 11) where, mi is the weight of sample after the immersion in water and mdry the initial dry mass of the sample. Moreover the capillary saturation moisture content is the amount of water obtained by capillaries until the water reached the upper surface of the sample.

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