Techniques have been developed for determination of the permeability of a variety of concretes to chloride ions in a relatively rapid period of time. The most promising method involves application of d.c. voltage in the range of 60.0-80.0 volts for 6-hours to either a section of a reinforced concrete bridge deck or a core taken from a concrete structure. Both variations involve conditioning of the specimen prior to test so as to eliminate test anomalies caused by low sample moisture contents. Core specimens can be tested at the rate of one specimen per day with a total of 2 days needed for a complete test including conditioning. The field apparatus is capable of conducting four tests within one working week on a given bridge deck. Results have been shown to yield reasonably good correlation with FHWA 90-day ponding data on companion specimens. Concretes can be ranked according to high, moderate, low, or very low chloride permeability. Further work is needed in order to make the test more applicable to field testing of bridge deck overlays.
RUB-R-ROAD (TM) is a rubberized (latex-reinforced) asphalt concrete waterproofing membrane. It provides a way to protect bridge decks from rain and ch...
The primary objective of this study was to use an experimental study, literature review, and discussions with vendors and Departments of Transportatio...
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