Virtural Rapid Chloride Permeability Test.
Virtural Rapid Chloride Permeability Test.
(723 K)
Bentz, D. P.
Cement and Concrete Composites, Vol. 29, No. 10,
723-731, November 2007.
Keywords:
chloride; permeability; diffusion; validation;
vertification; concretes; temperature effects;
conductivity; equations; test methods
Abstract:
The rapid chloride permeability test (RCPT), as it is
commonly called, has been in existence for over 20 years
and was standardized by ASTM over 15 years ago. The test
is used extensively in the concrete industry for
assessing concrete quality and is now being included in
concrete specification documents. Because the underlying
physics of the test are fairly well understood, it is
possible to create a virtual test method that mimics the
real world physical test. This paper presents a
prototype virtual test method that includes prediction
of the conductivity of the cementitious binder pore
solution and the total charge passed during an ASTM
C1202 RCPT. Potential applications of the virtual test
method are first discussed. Then, the technical
background used and the numerous assumptions employed in
creating the prototype virtual test are outlined in
detail. In addition, the computer implementation of the
virtual test, as a set of HTML/JavaScript web documents,
is presented. Validation against existing data sets is
presented, with a generally reasonable agreement noted
between the experimental and the virtual test results.
Building and Fire Research Laboratory
National Institute of Standards and Technology
Gaithersburg, MD 20899