Identification of alkali-reactive aggregates: Some examples

• Type: Article in International Scientific Journal
• Date: 2014

Authors

Fernandes, I (Author) FCUP; Ramos, V (Author) Other; Noronha, F (Author) FCUP; Santos Silva, A (Author) Other; Carlos Nunes, J (Author) Other; Medeiros, S (Author) Other

Journal

Title: Proceedings of Institution of Civil Engineers: Construction Materials

Vol. 167

Pages: 302-311

ISSN: 1747-650X

Publisher: ICE Publishing Ltd.

Indexing

ISI Web of Knowledge

Scopus - 1 Citation

Other information

Authenticus ID: P-00A-5DF

DOI: 10.1680/coma.13.00033

Abstract (EN): Alkali¿aggregate reactions have been known for decades although the acceptance of their occurrence has been delayed in some countries until the 1990s. Potential reactivity has been identified in most of the rock types used as aggregates around the world. The most common reactive rocks are sedimentary (e.g. opaline sandstone) and metamorphic (e.g. gneiss). However, igneous rocks such as granites have also proved to be reactive in some areas and innocuous in many other regions. It has been concluded that the designation is not enough to label a rock as reactive and thatmicrostructure is very often the determinant factor of reactivity. In the present study a summary ismade on the state-of-the-art on alkali¿aggregate reactions. Emphasis is given on the identification of potentially reactive aggregates based on petrographic methods. Examples from a large number of samples analysed in the scope of a research project are presented.

Language: English

Type (Professor's evaluation): Scientific