DRYING RATE AS A TRANSPORT INDEX FOR CONCRETE
Author(s): Villagrán-Zaccardi, Y. A., Alderete, N. M., Píttori, A. and Di Maio, A. A.
Paper category: Conference
Book title: XIII International Conference on Durability of Building Materials and Components - XIII DBMC
Editor(s): Marco Quattrone, Vanderley M. John
Print ISBN: none
Publication year: 2015
Total Pages: 8
Abstract: Pore connectivity determines transport properties of concrete, including the moisture transport. The drying rate of concrete is a process that strongly depends on the transport properties of concrete. This process may be dominated by the evaporation rate near the surface of concrete or the diffusion of moisture through concrete. The relationship between the rates of both processes is dependent on the temperature and vapor pressure. If concrete samples are oven dried, the evaporation rate is much faster than the rate of moisture diffusion, and the transport mechanism may therefore be effectively evaluated. In this paper, the capability of the drying rate to be used as a descriptor of the transport properties of concrete is evaluated. As a first step, the proposal is made with a prescriptive perspective. The representativeness of the method that determines the drying rate of concrete samples under controlled conditions is studied. In addition, a relationship is established between the drying rate and the properties of concrete usually used as design parameters for concrete durability in aggressive environments.
Online publication: 2015
Publication Type: full_text
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