✦ LIBER ✦

Oxygen diffusivity of various cementitious materials

✍ Scribed by Kazusuke Kobayashi; Keizoh Shuttoh

Publisher: Elsevier Science
Year: 1991
Tongue: English
Weight: 567 KB
Volume: 21
Category: Article
ISSN: 0008-8846
DOI: 10.1016/0008-8846(91)90009-7

No coin nor oath required. For personal study only.

✦ Synopsis

In order to quantitatively grasp the diffusivity of oxygen in concrete, an apparatus for measuring the amount of oxygen permeating through concrete due to a concentration gradient under a condition of constant pressure was manufactured on a trial basis.

Next, using this apparatus, the oxygen diffusion coefficients of vari6us cementitlous materials of different mix proportions, curing conditions, and moisture contents were measured, and it was shown that the oxygen diffusion coefficient of mortar is considerably lower than that of concrete, and by intermixing a polymer dispersion in the mortar, the value of the oxygen diffusion coefficient could be made markedly lower.

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