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2016 | Buch

RILEM Recommendations for the Prevention of Damage by Alkali-Aggregate Reactions in New Concrete Structures

State-of-the-Art Report of the RILEM Technical Committee 219-ACS

herausgegeben von: Philip J. Nixon, Ian Sims

Verlag: Springer Netherlands

Buchreihe : RILEM State-of-the-Art Reports

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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.

Inhaltsverzeichnis

Frontmatter
Introduction
Abstract
This book contains the full suite of RILEM Recommendations that have been produced to enable engineers, specifiers and testing houses to design and produce concrete that will not suffer damage arising from alkali-aggregate reactions in the concrete. There are five Recommended methods of test for aggregates.
On behalf of the membership of RILEM TC 219-ACS, Philip J. Nixon, Ian Sims
RILEM Recommended Test Method: AAR-0—Outline Guide to the Use of RILEM Methods in the Assessment of the Alkali-Reactivity Potential of Aggregates
Abstract
AAR-0 provides guidance on the integrated use of the assessment procedures described in AAR-1.1 & 1.2, AAR-2, AAR-3, AAR-4.1 and AAR-5 including preliminary advice on the interpretation of their findings. The principles are illustrated by the flow chart given in Fig. 1. Guidance on the specialised assessment of carbonate rock aggregates for alkali-reactivity potential is given in Annex A
On behalf of the membership of RILEM TC 219-ACS, Philip J. Nixon, Ian Sims
RILEM Recommended Test Method:AAR-1.1—Detection of Potential Alkali-Reactivity—Part 1: Petrographic Examination Method
Abstract
Petrographic analysis should always be the first step in the assessment of the potential alkali- reactivity of concrete aggregates as stated in RILEM AAR-0 (Outline guide to the use of RILEM methods in assessments of aggregates for potential alkali-reactivity).
On behalf of the membership of RILEM TC 219-ACS, Philip J. Nixon, Ian Sims
RILEM Recommended Test Method: AAR-2—Detection of Potential Alkali-Reactivity—Accelerated Mortar-Bar Test Method for Aggregates
Abstract
This draft method was originally prepared by RILEM TC 106-AAR (Alkali-Aggregate Reaction—Accelerated Tests) as TC 106-2, and has been revised by RILEM TC 191-ARP
On behalf of the membership of RILEM TC 219-ACS, Philip J. Nixon, Ian Sims
RILEM Recommended Test Method: AAR-3—Detection of Potential Alkali-Reactivity—38 °C Test Method for Aggregate Combinations Using Concrete Prisms
Abstract
The former version of this method was initially developed by RILEM following an international trial. This trial showed that the method can reliably differentiate reactive and non-reactive combinations.
On behalf of the membership of RILEM TC 219-ACS, Philip J. Nixon, Ian Sims
RILEM Recommended Test Method: AAR-4.1—Detection of Potential Alkali-Reactivity—60 °C Test Method for Aggregate Combinations Using Concrete Prisms
Abstract
This is a method developed by RILEM in the light of the results of an international trial. This trial showed that the method can reliably differentiate reactive and non-reactive combinations for a range of aggregate compositions from around the world.
On behalf of the membership of RILEM TC 219-ACS, Philip J. Nixon, Ian Sims
RILEM Recommended Test Method: AAR-5—Detection of Potential Alkali-Reactivity—Rapid Preliminary Screening Test for Carbonate Aggregates
Abstract
The accelerated mortar-bar test (AAR-2) has been widely and successfully used as a screening test to identify aggregates that are potentially alkali-reactive. However there are some aggregates that, though alkali-reactive according to both field experience and concrete prism test results, do not show as such in the mortar-bar test.
On behalf of the membership of RILEM TC 219-ACS, Philip J. Nixon, Ian Sims
RILEM Recommended Specification: AAR-7.1—International Specification to Minimise Damage from Alkali Reactions in Concrete—Part 1: Alkali-Silica Reaction
Abstract
Effective specifications to avoid damage from the reaction are based on ensuring that at least one of these conditions is absent.
On behalf of the membership of RILEM TC 219-ACS, Philip J. Nixon, Ian Sims
RILEM Recommended Specification: AAR-7.2—International Specification to Minimise Damage from Alkali Reactions in Concrete—Part 2: Alkali-Carbonate Reaction
Abstract
Carbonate rocks containing finely divided inclusions of silica. These may be termed siliceous limestones and can be very reactive towards alkalis. Because of the finely disseminated nature of the silica it can be difficult to detect by conventional optical petrography.
On behalf of the membership of RILEM TC 219-ACS, Philip J. Nixon, Ian Sims
RILEM Recommended Specification: AAR-7.3 Preliminary International Specification to Minimise Damage from Alkali-Aggregate Reactions in Concrete—Part 3: Concrete Dams and Other Hydro Structures
Abstract
AAR 7.1 provides a model specification for minimising the likelihood of damage in concrete structures that are expected to have a normal service life and where the possibility of premature deterioration, although undesirable, could be managed. There are dams and other hydro structures, however, where the expected service life is very long, probably more than 100 years, and the consequences of premature failure are unacceptable.
On behalf of the membership of RILEM TC 219-ACS, Philip J. Nixon, Ian Sims
Metadaten
Titel
RILEM Recommendations for the Prevention of Damage by Alkali-Aggregate Reactions in New Concrete Structures
herausgegeben von
Philip J. Nixon
Ian Sims
Copyright-Jahr
2016
Verlag
Springer Netherlands
Electronic ISBN
978-94-017-7252-5
Print ISBN
978-94-017-7251-8
DOI
https://doi.org/10.1007/978-94-017-7252-5