RILEM Technical Committee: TC 258-AAA (Avoiding Alkali Aggregate Reactions in Concrete - performance based concept: current activities and achievement)

Author(s): Børge Wigum, Jan Lindgård
Paper category: Proceedings
Book title: Proceedings of the International Conference on Sustainable Materials Systems and Structures (SMSS2019) Durability, Monitoring and Repair of Structures
Editor(s): Ana Baričević, Marija Jelčić Rukavina, Domagoj Damjanović, Maurizio Guadagnini
ISBN: 978-2-35158-217-6
e-ISBN: 978-2-35158-218-3
Publisher: RILEM Publications SARL
Publication year: 2019
Pages: 144-151
Total Pages: 813
Language: English

Abstract: Since 1988, several consecutive RILEM TCs have been seeking to establish universally applicable test methods for assessing the potential alkali-reactivity of aggregates and concrete mixtures; TC 106 (1988–2001), TC 191-ARP (2001–2006) and TC 219-ACS (2006–2014). The major recommendations, focusing on test methods for aggregates, were published in 2016. In 2014, TC 258-AAA (2014-2019) was established, concentrating on performance-based assessment. The TC includes four Work Packages (WPs); WP1 aims to develop one or more concrete performance tests (CPTs). Currently, a Round Robin Test (RRT) is being carried out with the draft procedure for the 38°C "RILEM AAR-10" CPT. More accelerated CPTs are also under development. WP2 is dealing with the link between results from laboratory testing and field. In 2015, about 80 monitored concrete cubes were prepared and distributed at 10 field exposure sites in Europe and North America. Drilled cores from about 20 field cubes cast in 2004 are also being analysed. WP3 primarily aims to develop a method for measuring the (maximum) potential alkali release from aggregates, while the main goal of WP4 is to compile results from laboratory testing, exposure sites and concrete structures to assess the “true” level of alkali released from various aggregates.

Online publication :2019
Publication type : full_text
Public price (Euros) : 00