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Title:

Assessing Structural Integrity of Closure Pours in ABC Projects

Accession Number:

01657435

Record Type:

Component

Abstract:

Durability and service life of bridges constructed using Accelerated Bridge Construction (ABC) philosophy is of extreme concern for bridge owners. Work is being carried out at the Accelerated Bridge Construction University Transportation Center (ABC-UTC) to develop a customized manual for service life design of ABC bridges. As part of this work, the performance of closure pours in ABC bridges is being investigated. This paper provides a summary of some of the work carried out to assess the structural integrity of different closure pours in ABC bridges. The ultimate objective is to provide the bridge owners with information to select suitable closure pours for a given project and providing them with a methodology to assess the structural integrity of closure pours using non-destructive testing. To this end, this paper provides results of Impulse Response (IR) non-destructive testing performed on in-place bridge structures and on test specimens constructed in the laboratory. The IR non-destructive testing has been successfully applied to assist in the general evaluation of structures. Typically, it can identify areas associated with damage such as honeycombs, voids and cracks because of the variation in mobility or stiffness.The laboratory test specimens were constructed with 3 typical joint configurations specified and constructed for ABC structures. Two of the joints were constructed with normal strength concrete, and the third with Ultra-High-Performance Concrete (UHPC). The lab specimens incorporated areas with manufactured discontinuities in the concrete and rebar to study the resultant IR test signatures. These results are compared with IR test signatures obtained from field tests of in-service bridges incorporating similar joint details.

Supplemental Notes:

This paper was sponsored by TRB committee AFF00 Section - Structures.

Report/Paper Numbers:

18-05307

Language:

English

Authors:

Jahromi, Azadeh Jaberi
Dickinson, Morgan
Valikhani, Alireza
Azizinamini, Atorod

Pagination:

15p

Publication Date:

2018

Conference:

Transportation Research Board 97th Annual Meeting

Location: Washington DC, United States
Date: 2018-1-7 to 2018-1-11
Sponsors: Transportation Research Board

Media Type:

Digital/other

Features:

Figures; Photos; References

Uncontrolled Terms:

Structural integrity

Subject Areas:

Bridges and other structures; Construction; Highways

Source Data:

Transportation Research Board Annual Meeting 2018 Paper #18-05307

Files:

TRIS, TRB, ATRI

Created Date:

Jan 8 2018 11:20AM