Report on Determining the Reactivity of Concrete Aggregates and Selecting Appropriate Measures for Preventing Deleterious Expansion in New Concrete Construction

Thomas, Michael D. A.; Fournier, Benoit; Folliard, Kevin J.

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Report on Determining the Reactivity of Concrete Aggregates and Selecting Appropriate Measures for Preventing Deleterious Expansion in New Concrete Construction

2008-01-01
By Thomas, Michael D. A. ; Fournier, Benoit ; Folliard, Kevin J.

File Language:

English

Details

Creators:

Thomas, Michael D. A. ; Fournier, Benoit ; Folliard, Kevin J.
Corporate Contributors:

Transtec Group, Inc. ; United States. Federal Highway Administration. Office of Pavement Technology
Subject/TRT Terms:
Publication/ Report Number:

FHWA-HIF-09-001
Resource Type:

Tech Report
Geographical Coverage:

United States
Corporate Publisher:

United States. Federal Highway Administration
Abstract:

Alkali-aggregate reactions (AAR) occur between the alkali hydroxides in the pore solution of concrete and certain minerals found in some aggregates. Two types of AAR reaction are currently recognized depending on the nature of the reactive mineral; alkali-silica reaction (ASR) involves various types of reactive silica (SiO2) minerals and alkali-carbonate reaction (ACR) involves certain types of dolomitic rocks (CaMg(CO3)2). Both types of reaction can result in expansion and cracking of concrete elements, leading to a reduction in the service life of concrete structures. This report describes approaches for identifying deleteriously reactive aggregates and selecting appropriate preventive measures to minimize the risk of expansion when such aggregates are used in concrete. Preventive measures include avoiding the reactive aggregate, limiting the alkali content of the concrete, using supplementary cementing materials, using lithium-based admixtures, or a combination of these strategies.
Format:

PDF
Funding:

DTFH61-D-00035
Download URL:

https://rosap.ntl.bts.gov/view/dot/41512/dot_41512_DS1.pdf
File Type:

[PDF - 5.57 MB]
Collection(s):

Federal Highway Administration
Main Document Checksum:

urn:sha-512:49ac831ab3803ba9ab044b8653eef5c0a594afac17b511eafc9e97b4da940c9e16968f5076f2d7e44f3a2d376cf9126286f9edc67a143b25fc4874590668f5dc

File Language:

English

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