An effective diffusivity for sulfate transport into concrete

✍ Scribed by Peter J. Tumidajski; G.W. Chan; Ken E. Philipose

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 306 KB
• Volume: 25
• Category: Article
• ISSN: 0008-8846
• DOI: 10.1016/0008-8846(95)00108-o

✦ Synopsis

The effective non-steady state diffusivity of sulfate ingress from a mixed sulfatechloride solution into Type 50 cement concrete was determined from concentration profiles at various times up to five years. Furthermore, the influence of CO* saturation on the effective diffusivity was determined. The time dependence of the effective non-steady sulfate diffusivities were, log ( Deffective sulfate ) = -6.6543 -0.7626 log ( t ) and, log ( DZZive sulfate ) = -6.2873 -0.8559 log ( t )

where Deffective sulfate represents the effective sulfate diffusivity, DzFztive s.lfate represents the effective sulfate diffusivity of the solution saturated with respect to COZ, and t represents the time (months).