Title:
Short-Term Chloride Penetration Into
Relatively Impermeable Concretes
Author(s):
W. F. Perenchio and S. L. Marusin
Publication:
Concrete International
Volume:
5
Issue:
4
Appears on pages(s):
37-41
Keywords:
admixtures; chlorides; compressive strength; concretes; epoxy resins; immersion tests (corrosion); permeability; plastics, polymers and resins; resurfacing; water.
DOI:
Date:
4/1/1983
Abstract:
Thin concrete overlays are used extensively in resurfacing concrete bridge decks and parking structures. Even more important than their strength and resistance to wear is the ability of such concretes to resist the ingress of water-borne chloride ions. If water and chloride ions can be largely excluded, embedded reinforcing steel will not be subject to galvanic corrosion with subsequent delamination and spalling of the concrete. This study presents data which shows the amount of water and chloride imbibed by 4 in. (100 mm) concrete cubes. The concrete mixtures included a typical structural concrete, an Iowa method low-slump concrete, along with the same low water-cement ratio mixture to which a high-range water reducer was added, two concretes containing synthetic latexes, and one concrete containing an epoxy admixture. The concrete made with the epoxy was the least permeable followed by those containing the latexes, the Iowa concretes, and then the structural concrete.*