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Title:

Inspection, Risk Assessment, and Management Planning of MassDOT Transportation Structures Affected by Alkali-Silica Reaction
Cover of Inspection, Risk Assessment, and Management Planning of MassDOT Transportation Structures Affected by Alkali-Silica Reaction

Accession Number:

01555191

Record Type:

Component

Availability:

Transportation Research Board Business Office

500 Fifth Street, NW
Washington, DC 20001 United States

Abstract:

Alkali-silica reaction (ASR) is a frequent cause of concrete deterioration. ASR occurs when certain silica-containing aggregates react with hydroxyl and alkali ions to form an expansive silica gel, leading to cracking of the aggregate and concrete. Because ASR-induced concrete deterioration is a gradual time-dependent process, concrete structures undergoing ASR can often still serve their intended purpose provided that the effects of the ASR are understood, monitored, and managed. After identifying 40 structures with the potential for alkali-silica reaction (ASR) due to the use of suspect aggregates, the Massachusetts Department of Transportation (MassDOT) undertook a research program to develop a means of managing the potential effects of any ASR. Building upon work completed by the Federal Highway Administration and the Institution of Structural Engineers, the program established a protocol for field inspection and diagnosis of ASR, evaluation of the extent of any ASR-related damage and its potential effect on the structure, monitoring of its progression, and long-term management of each affected structure. This paper presents the protocol, including the preliminary field assessment (visual observation, cracking index measurements, and core sampling), supplemental laboratory evaluation (petrographic examination and Damage Rating Index tests), and resulting evaluation of the structural and performance implications. Using examples, particular emphasis will be applied to the resulting evaluation and management plans presented in the protocol that incorporates and guides the future management of the ASR in the structures.

Supplemental Notes:

This paper was sponsored by TRB committee AFN30 Durability of Concrete.

Monograph Accession #:

01550057

Report/Paper Numbers:

15-4927

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Jiang, Liying
Sherman, Matthew R
Grieco, John

Pagination:

17p

Publication Date:

2015

Conference:

Transportation Research Board 94th Annual Meeting

Location: Washington DC, United States
Date: 2015-1-11 to 2015-1-15
Sponsors: Transportation Research Board

Media Type:

Digital/other

Features:

Figures; Photos; References; Tables

Subject Areas:

Administration and Management; Bridges and other structures; Highways; Maintenance and Preservation; Materials; I10: Economics and Administration; I24: Design of Bridges and Retaining Walls; I32: Concrete; I60: Maintenance

Source Data:

Transportation Research Board Annual Meeting 2015 Paper #15-4927

Files:

PRP, TRIS, TRB, ATRI

Created Date:

Dec 30 2014 1:39PM