A Comparison of Service Life Models for Concrete Corrosion Durability

Khan, Zafrul H.; Alhasan, Ahmad

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A Comparison of Service Life Models for Concrete Corrosion Durability

2023-12-01
By Khan, Zafrul H. ; Alhasan, Ahmad

File Language:

English

Details

Creators:

Khan, Zafrul H. ; Alhasan, Ahmad
Corporate Creators:

Applied Research Associates, Inc.
Corporate Contributors:

Florida. Department of Transportation
Subject/TRT Terms:

Chloride Content Corrosion Durability Service Life Structural Models
Resource Type:

Tech Report
Geographical Coverage:

United States ; Florida
Edition:

June 2023 -December 2023
Corporate Publisher:

Florida. Department of Transportation
Abstract:

This study compares the service life models of concrete structures against chloride-induced corrosion. Empirical, stochastic, and mechanistic-based service life models were studied. Two popular mechanistic service life models, Life-365 and fib Bulletin 34, were further evaluated. From the design of experiment and statistical analysis, the important parameters from highest to least importance were found to be diffusion coefficient, concrete cover, aging exponent, surface chloride concentration, and temperature based on the conditions in Florida. This study recommends the fib-34-Bulletin-based model for service life modeling of concrete structures against chloride-induced corrosion due to its inherent ability to consider the associated uncertainties. These uncertainties can arise from adopting simplified models or the unavailability of reliable data. Deterministic service life prediction using Life-365 is a better choice if the user is confident about the field observations and knows the input parameters with a significant degree of certainty. In addition, this study also provided suggestions and recommendations regarding the input parameters for the fib-34-Bulletin-based model.
Format:

PDF
Funding:

BED49-977-08
Collection(s):

US Transportation Collection
Main Document Checksum:

urn:sha-512:117898388f6619198823ab6d220e5a5d13707b133d5018b788ed2c03133a7e5010c712ef1c283058129f6c9025740b96ee3cbd5eb03efc6a1c58ca40111dd7b3
Download URL:

https://rosap.ntl.bts.gov/view/dot/87986/dot_87986_DS1.pdf
File Type:

[PDF - 4.39 MB ]

File Language:

English

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