Alkali-silica reactivity of some common rock types. A global petrographic atlas

• Type: Article in International Scientific Journal
• Date: 2013

Authors

Isabel Fernandes (Author) FCUP; Maarten A T M Broekmans (Author) Other; Philip Nixon (Author) Other; Ian Sims (Author) Other; Maria dos Anjos Ribeiro (Author) FCUP; Fernando Noronha (Author) FCUP; Borge Wigum (Author) Other

Journal

Title: Quarterly Journal of Engineering Geology and Hydrogeology

Vol. 46

Pages: 215-220

ISSN: 1470-9236

Publisher: Geological Society

Indexing

ISI Web of Knowledge - 3 Citations

Scopus - 2 Citations

Scientific classification

FOS: Engineering and technology > Environmental engineering

Other information

Authenticus ID: P-005-10M

DOI: 10.1144/qjegh2012-065

Abstract (EN): The correct identification of potentially alkali-silica reactive aggregates is important for the prevention of alkali-silica reaction (ASR) in concrete. Although a number of standards for assessment of concrete aggregate by petrography are available, distinction of potentially deleterious from innocuous rock types can be problematic. The application of geological nomenclature alone is insufficient, as the geological history and hence mineralogical texture of a given rock type may strongly influence its performance in concrete. One of the goals of RILEM TC 219-ACS is to develop a worldwide photo atlas as a guide for petrographers in the identification of the mineral compositions and textures that are characteristic of alkali-reactive rocks. The atlas is based on micrographs of rock types recognized as potentially deleterious by field performance and/or laboratory expansion testing. It is intended to serve as an independent reference work and aims to unify rock terminology so as to improve the petrographic characterization of aggregates. The mission of RILEM, the International Union of Laboratories and Experts in Construction Materials, Systems and Structures (Reunion Internationale des Laboratoires et Experts des Materiaux), is to advance scientific knowledge in the field of construction. Its Technical Committee TC 219-ACS focuses on alkali reactions and their effects on concrete.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6