A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Concrete Bridge Protection and Rehabilitation: Chemical and Physical Techniques. Service Life Estimates
The objective of this study is to estimate the service life cycle of reinforced concrete bridge components exposed to chloride-laden environments. Current treatment options were identifed and an opinion survey was used to obtain first estimates of service life. A quantitative definition of end of service life was developed for each option. The transport of chloride through concrete is a complex phenomenon. For simplicity, the movement of chloride was modeled as apparent diffusion. Definitions of four categories of corrosive environment were developed for diffusion parameters. The end of functional service life of untreated bridge decks and bridge substructures was quantitatively defined as the point when the level of damage is 5.8% to 10.0% of the whole deck of 9.3% to 13.6% of the worst damage lane. The decision to rehabilitate was found to be affected by the amount of physical damage, availability of funds/labor, condition of substructure, average annual daily traffic, and distribution of physical damage. To estimate the service life of untreated and rehabilitated bridge decks, data from 52 bridge decks distributed in different environmental conditions were collected including chloride contents, cover depths, potential, corrosion current density estimates, and damaged area measurements (cracking, spalling, delaminations, and patches). (Copyright (c) 1994 National Academy of Sciences.)
Concrete Bridge Protection and Rehabilitation: Chemical and Physical Techniques. Service Life Estimates
The objective of this study is to estimate the service life cycle of reinforced concrete bridge components exposed to chloride-laden environments. Current treatment options were identifed and an opinion survey was used to obtain first estimates of service life. A quantitative definition of end of service life was developed for each option. The transport of chloride through concrete is a complex phenomenon. For simplicity, the movement of chloride was modeled as apparent diffusion. Definitions of four categories of corrosive environment were developed for diffusion parameters. The end of functional service life of untreated bridge decks and bridge substructures was quantitatively defined as the point when the level of damage is 5.8% to 10.0% of the whole deck of 9.3% to 13.6% of the worst damage lane. The decision to rehabilitate was found to be affected by the amount of physical damage, availability of funds/labor, condition of substructure, average annual daily traffic, and distribution of physical damage. To estimate the service life of untreated and rehabilitated bridge decks, data from 52 bridge decks distributed in different environmental conditions were collected including chloride contents, cover depths, potential, corrosion current density estimates, and damaged area measurements (cracking, spalling, delaminations, and patches). (Copyright (c) 1994 National Academy of Sciences.)
Concrete Bridge Protection and Rehabilitation: Chemical and Physical Techniques. Service Life Estimates
R. E. Weyers (author) / M. G. Fitch (author) / E. P. Larsen (author) / I. L. Al-Qadi (author) / W. P. Chamberlin (author)
1994
384 pages
Report
No indication
English
Highway Engineering , Construction Equipment, Materials, & Supplies , Transportation & Traffic Planning , Transportation , Road Transportation , Service life , Highway bridges , Reinforced concrete , Bridge abutments , Bridge decks , Bridge maintenance , Diffusion , Chlorides , Damage assessment , Concrete structures , Estimation
Cost Relationships for Concrete Bridge Protection, Repair, and Rehabilitation
| British Library Online Contents | 1995