Influence of Chemical Activation on Chloride Penetration in Concrete

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Title: Influence of Chemical Activation on Chloride Penetration in Concrete

Author(s): A.L.G. Gastaldini, G.C. Isaia, N.S. Gomes, and J.E.K. Sperb

Publication: Special Publication

Volume: 229

Issue:

Appears on pages(s): 93-108

Keywords: blast-furnace slag; chloride ions; compressive strength; durability; porosity; rice husk ash

Date: 9/1/2005

Abstract:
This study was aimed at investigating the influence of chemical activators on compressive strength and chloride-ion penetrability on binary and ternary concrete compositions, whose pore solution composition, electrical conductivity and total mercury intrusion volume were also determined. The chemically activated mixtures displayed higher chloride-ion penetrability and potassium sulfide was identified as the most effective activator. The study also showed that for a given mixture the influence of total porosity on chloride-ion penetrability was greater than the influence of specific conductivity of the pore solution.