Guide to Diagnosis and Appraisal of AAR Damage to Concrete in Structures ab 128.49 € als pdf eBook: Part 1 Diagnosis (AAR 6. 1). Aus dem Bereich: eBooks, Sachthemen & Ratgeber, Technik,
Guide to Diagnosis and Appraisal of AAR Damage to Concrete in Structures ab 129.99 € als Taschenbuch: Part 1 Diagnosis (AAR 6. 1). Auflage 2013. Aus dem Bereich: Bücher, Wissenschaft, Technik,
Guide to Diagnosis and Appraisal of AAR Damage to Concrete in Structures ab 138.99 € als gebundene Ausgabe: Part 1 Diagnosis (AAR 6. 1). Auflage 2013. Aus dem Bereich: Bücher, Wissenschaft, Technik,
Guide to Diagnosis and Appraisal of AAR Damage to Concrete in Structures ab 138.99 EURO Part 1 Diagnosis (AAR 6. 1). Auflage 2013
Guide to Diagnosis and Appraisal of AAR Damage to Concrete in Structures ab 129.99 EURO Part 1 Diagnosis (AAR 6. 1). Auflage 2013
Guide to Diagnosis and Appraisal of AAR Damage to Concrete in Structures ab 128.49 EURO Part 1 Diagnosis (AAR 6. 1)
This book describes procedures and methodologies used predominantly to obtain a diagnosis of damaged concrete possibly caused by Alkali-Aggregate Reaction (AAR). It has two primary objectives, namely firstly to identify the presence of AAR reaction, and whether or not the reaction is the primary or contributory cause of damage in the concrete, and secondly, to establish its intensity (severity) in various members of a structure. It includes aspects such as field inspection of the structure, sampling, petrographic examination of core samples, and supplementary tests and analyses on cores, such as mechanical tests and chemical analysis. Evaluation of test data for prognosis, consequences and appraisal will be more fully set out in AAR-6.2.
This book contains the full set of RILEM Recommendations which have been produced to enable engineers, specifiers and testing houses to design and produce concrete which will not suffer damage arising from alkali reactions in the concrete. There are five recommended test methods for aggregates (designated AAR-1 to AAR-5), and an overall recommendation which describes how these should be used to enable a comprehensive aggregate assessment (AAR-0). Additionally, there are two Recommended International Specifications for concrete (AAR-7.1 & 7.2) and a Preliminary International Specification for dams and other hydro structures (AAR-7.3), which describe how the aggregate assessment can be combined with other measures in the design of the concrete to produce a concrete with a minimised risk of developing damage from alkali-aggregate reactions.
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.