Title: Predicting Corrosion-Free Service Life of a Concrete Structure in a Chloride Environment

Author(s): MikiI Funahashi

Publication: Materials Journal

Volume: 87

Issue: 6

Appears on pages(s): 581-587

Keywords: chlorides; computer programs; concrete durability; evaluation; concrete slabs; corrosion resistance; deicers; finite difference theory; parking facilities; prestressing steels; diffusion; Materials Research

DOI: 10.14359/2533

Date: 11/1/1990

Abstract:
The durability of a prestressed concrete deck in a parking garage is largely dependent on the corrosions of the prestressed strands. The time when the chloride-concentration level exceeds the threshold limit to initiate corrosion on the strands was calculated using Fick's diffusion law. Migration of chlorides was studied within the context of previous research. To develop a prediction method for the movement of the chloride concentration profile with respect to time, a computerized finite difference method was deployed. The method presented in this paper provides a scientific way for maintenance engineers to evaluate concrete structures exposed to salt environments.