Modelling Service Life and Life-Cycle Cost of Steel-Reinforced Concrete. Report From the NIST/ACI/ASTM Workshop Held in Gaithersburg, MD on November 9-10, 1998.
Modelling Service Life and Life-Cycle Cost of
Steel-Reinforced Concrete. Report From the
NIST/ACI/ASTM Workshop Held in Gaithersburg, MD on
November 9-10, 1998.
(2605 K)
Frohnsdorff, G. J. C.
NISTIR 6327; 55 p. May 1999.
Modelling Service Life and Life-Cycle Cost of
Steel-Reinforced Concrete. Report From the
NIST/ACI/ASTM Workshop Held in Gaithersburg, MD.
Proceedings. November 9-10, 1998, 55 pp, 1999.
Available from:
National Technical Information Service
(NTIS), Technology Administration, U.S. Department of
Commerce, Springfield, VA 22161.
Telephone:
1-800-553-6847 or 703-605-6000;
Fax: 703-605-6900.
Website: http://www.ntis.gov
Order number: PB99-144933
Keywords:
reinforced concretes; chlorides; concretes; corrosion;
life (durability); transport processes
Abstract:
**EACH PAPER IS TREATED LIKE A SEPARATE DOCUMENT AND MAY
BE VIEWED AND/OR DOWNLOADED THAT WAY**
The NIST/ACI/ASTM workshop on "Modelling Service Life
and Life-Cycle Cost of Steel-Reinforced Concrete" was
focused on possibilities for developing and
standardizing such models, specifically for
chloride-exposed concrete. The report includes summaries
of nine presentations by model developers and reports
from working groups that addressed i) chloride transport
mechanisms and test methods, ii) chloride thresholds for
corrosion initiation, iii) corrosion rate and time to
rehabilitate or replace, and iv) life-cycle cost and
service life prediction models. Several models for
chloride transport to the steel were well advanced, but
modelling of chloride thresholds and corrosion rates
poses difficulties that still need to be overcome.
Economic models for life-cycle costing are in place and
ready to use with service life models as they are
developed. It was agreed that standard models for
service life prediction and life-cycle costing are
necessary. It was recommended that a simple, but useful
model could and should be developed and standardized in
the short term, with a more scientifically sound model
being a longer term objective. The model development
would need to be supported by development of some new
standard test methods and databases containing
appropriate and reliable data. Standardization of the
models would be expected to be carried out in ACI
committees and standardization of test methods in ASTM.
NIST's Partnership for High-Performance Concrete
Technology would contribute to the development of
models, test methods, and data.
Selected Papers
-
Tribute to James R. Clifton (1933-1999).
Frohnsdorff, G. J. C.
-
Introduction.
Frohnsdorff, G. J. C.
-
RILEM Technical Committee TMC, Testing and Modelling Chloride Penetration in Concrete.
Castellote, M.
-
Model for a Quantitative Corrosion Damage Function for a Reinforced Concrete Marine Substructure.
Sagues, A.
-
Present Limitations in Scientifically-Based Prediction Models for Chloride Ingress Into Submerged Concrete.
Nilsson, L. O.
-
Chloride Exposed RC-Structures: Chloride Ingress and Lifetime Prediction by the Hetek Model.
Poulsen, E.
-
Modelling Chloride Ingress by the Combined Processes of Diffusion and Convection.
Thomas, M.; Bentz, E.
-
Modeling Ion Transport in Cement-Based Materials.
Marchand, J.; Samson, E.; Maltais, Y.
-
Duramodel for the Design of Cost-Effective Concrete Structures.
Tourney, P.
-
Creating a Standard Corrosion Service Life Prediction Method.
Miltenberger, M. A.
-
Predicting Service Life of Chloride-Exposed Steel-Reinforced Concrete.
Bentz, D. P.
-
Using Concrete Service Life Prediction Models to Estimate the Life-Cycle Costs of Concrete Structures.
Ehlen, M. A.
-
Working Group Reports 1-8. Final Discussion and Recommendations.
National Institute of Standards and Technology; American Concrete Institute; American Society for Testing and Materials
Building and Fire Research Laboratory
National Institute of Standards and Technology
Gaithersburg, MD 20899