Comparison of Corrosion Service Life Models, Part 1 of 2

Wednesday, November 1, 2023  8:30 AM - 10:30 AM, W-Marina Ballroom IV

These sessions are useful to design engineers, owners, concrete producers, and students that are involved or want to know more about modeling the service life of concrete exposed to chlorides. The differences between deterministic and probabilistic approaches will be addressed.

Learning Objectives:
(1) Summarize background on the models;
(2) Identify what tests are needed to run the models;
(3) Discuss how boundary conditions are determined;
(4) Establish service life predictions for scenarios.

The presenters will receive transport properties determined for each method on the same concrete mix.

This session has been approved by AIA and ICC for 2 PDHs (0.2 CEUs). Please note: You must attend the live session for the entire duration to receive credit. On-demand sessions do not qualify for PDH/CEU credit.

Introduction to Concrete Mixtures, Parameters and Scenarios

Presented By: Neal Berke
Affiliation: Tourney Consulting Group, LLC
Description: This presentation will provide an introduction to the different scenarios that will be evaluated by each of the models

Life-365 Service Life Prediction Model™: For Reinforced Concrete Exposed to Chlorides

Presented By: Mark Ehlen
Affiliation: Life-365 Consortium
Description: More information coming soon.

Duracrete/fib Bulletin 34 Service Life Model

Presented By: Anne-Marie Langlois
Affiliation: Buckland and Taylor
Description: Various codes, standards, guidelines, and engineering tools (both open source and proprietary) exist to assess the service life duration of reinforced concrete structures exposed to environmental conditions that promote chloride-induced reinforcement corrosion. In this session, several of these tools will be implemented on theoretical structural components located in Boston with a required 100-year service life, including a bridge deck, a marine pile and a marine wall constructed from one of three prescribed concrete mix designs. In this presentation, the implementation and conclusions of the probabilistic-based modeling approach presented in the fib Bulletin 34 and prescriptive requirements from AASHTO Guide Specification for Service Life Design of Highway Bridges will be described.

Probabilistic Service Life Modeling Implemented through WJE CASLE™

Presented By: John Lawler
Affiliation: Wiss, Janney, Elstner Associates, Inc.
Description: Service life analysis provides a significant value in evaluating remaining life and guiding repair decisions for existing structures, and supporting selection of appropriate corrosion protection strategies during construction of new structures. This presentation will discuss implementing WJE CASLE™ service life modeling software to predict the chloride ingress and associated corrosion damage in reinforced concrete structures. WJE CASLE™ accounts for the inherent variation in reinforced concrete construction, exposure, and deterioration by using probabilistic-based modeling. The model methodology is based on concepts described in Fib Bulletin 34, while allowing a customizable approach to the circumstances and exposure conditions unique to each project.