Petrographic Atlas: Characterisation of Aggregates Regarding Potential Reactivity to Alkalis: RILEM TC 219-ACS Recommended Guidance AAR-1.2, for Use with the RILEM AAR-1.1 Petrographic Examination Method

Fernandes, Isabel (Edited by)/ Ribeiro, Maria dos Anjos (Edited by)/ Broekmans, Maarten A T M (Edited by)/ Sims, Ian (Edited by)

ISBN 10: 9401773823 / ISBN 13: 9789401773829

Edité par Springer, 2016

A propos de cet article

193 pages. 11.00x8.50x0.50 inches. In Stock.

N° de réf. du vendeur x-9401773823

Détails bibliographiques

• Titre: Petrographic Atlas: Characterisation of Aggregates Regarding Potential Reactivity to Alkalis: RILEM TC 219-ACS Recommended Guidance AAR-1.2, for Use with the RILEM AAR-1.1 Petrographic Examination Method
• Éditeur: Springer
• Date de parution: 2016
• Langue: anglais
• ISBN à 10 chiffres: 9401773823
• ISBN à 13 chiffres: 9789401773829
• Reliure: Hardcover
• État de l'article: Brand New
• Poids: 0,7 kilogramme

A propos de ce titre

Synopsis

This RILEM AAR 1.2 Atlas is complementary to the petrographic method described in RILEM AAR 1.1. It is designed and intended to assist in the identification of alkali-reactive rock types in concrete aggregate by thin-section petrography. Additional issues include:
• optical thin-section petrography conforming to RILEM AAR 1.1 is considered the prime assessment method for aggregate materials, being effective regarding cost and time. Unequivocal identification of minerals in very-fine grained rock types may however require use of supplementary methods.
• the atlas adheres to internationally adopted schemes for rock classification and nomenclature, as recommended in AAR 1.1. Thus, rock types are classified as igneous, sedimentary or metamorphic based upon mineral content, microstructure and texture/fabric.
• in addition, the atlas identifies known alkali-reactive silica types in each rock type presented. It also identifies consistent coincidence between certain lithologies and silica types; however, it refrains from attributing alkali-reactivity to a specific silica property or quality.
• operator skill and experience remain essential for reliable assessment by thin-section petrography.
• aggregate materials must be classified according to local criteria, based on regional experiences with ASR-damaged field structures and geology. Access to additional data may be relevant for the assessment of imported materials.
• mere application of rock nomenclature does not provide any sort of warranty to the development of deleterious alkali-reaction. Such may result in either rejection of a suitable aggregate material, thus wasting a valuable resource, or acceptance of an unsuitable material leading to concrete damage, both of which are undesirable.