Results from Visual Inspection and Laboratory Testing for ASR in Existing Concrete Cores from Bridges and Pavements in California

Li, H.; Zhou, J.; Guada, I.; Wu, R.; Kannekanti, V.; Asselanis, J.; University of California (System). Pavement Research Center; University of California, Davis. Dept. of Civil and Environmental Engineering

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Results from Visual Inspection and Laboratory Testing for ASR in Existing Concrete Cores from Bridges and Pavements in California

2017-03-01
By Li, H. ; Zhou, J. ; Guada, I. ; ...

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English

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Creators:

Li, H. ; Zhou, J. ; Guada, I. ; Wu, R. ; Kannekanti, V. ; ... More +

Li, H. ; Zhou, J. ; Guada, I. ; Wu, R. ; Kannekanti, V. ; Asselanis, J. Less -
Corporate Creators:

University of California (System). Pavement Research Center ; University of California, Davis. Dept. of Civil and Environmental Engineering

University of California (System). Pavement Research Center ; University of California, Davis. Dept. of Civil and Environmental Engineering Less -
Corporate Contributors:

California. Dept. of Transportation. Division of Research, Innovation, and System Information
Subject/TRT Terms:

[+]

Alkali Silica Reactions ASR Bridge Decks Concrete Pavements Cores (Specimens) Damage Data Collection Inspection Materials Tests Pavements Petrographic Examination Petrography Service Life Strength Visual Inspection
Publication/ Report Number:

CAS15-2702
Resource Type:

Tech Report
Geographical Coverage:

San Francisco Bay Area ; United States

San Francisco Bay Area ; United States Less -
TRIS Online Accession Number:

01630343
Edition:

RESEARCH REPORT
Corporate Publisher:

University of California (System). Pavement Research Center ; California. Dept. of Transportation. Division of Research and Innovation

University of California (System). Pavement Research Center ; California. Dept. of Transportation. Division of Research and Innovation Less -
NTL Classification:

NTL-HIGHWAY/ROAD TRANSPORTATION-Bridges and Structures;NTL-HIGHWAY/ROAD TRANSPORTATION-Pavement Management and Performance;
Abstract:

The overall goal of this project was to evaluate with available cores the presence of alkali-silica reaction (ASR) in California bridges and pavements, to develop procedures for evaluation of ASR by Caltrans staff, and, potentially, to investigate several locations suspected of having ASR damage. This report summarizes the creation of an inventory for cores taken from bridges and pavement in previous projects, the results of visual inspection and strength testing to identify the potential presence of ASR, and the development of a draft approach for Caltrans staff to evaluate the potential for ASR in bridges and pavements. A spreadsheet database was prepared for storing inventory data for 265 pavement cores with four inch (100 mm) diameter and 311 bridge cores with two inch (50 mm) diameter. Most of the bridge cores were from the San Francisco Bay Area, while the pavement cores were collected from across the state. Visual inspection was performed on 259 of the pavement cores (including multiple samples from some of the pavement cores) and 80 of the bridge cores (those with lengths greater than the three-inch minimum required for evaluation of ASR) using the Damage Rating Index (DRI) method. None of the cores showed the likelihood of an ASR issue, as defined by a DRI greater than 2,000, although a few cores showed a small number of ASR features. Comparison of the ages of the bridges and the ASR damage rating index for the cores showed almost no trend, and showed no apparent differences between cores from bridges built before and after 1995, approximately when Caltrans changed specifications to reduce the risk of ASR.
Format:

PDF
Funding:

65A0542
Collection(s):

US Transportation Collection
Main Document Checksum:

[+]

urn:sha256:0ad2e6abf5fea32c361be25e6f7fea693b13dbe29c2ecd862ddc474b1dc74722
Download URL:

https://rosap.ntl.bts.gov/view/dot/36849/dot_36849_DS1.pdf
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Results from Visual Inspection and Laboratory Testing for ASR in Existing Concrete Cores from Bridges and Pavements in California

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