AAR in concrete: Russian experience

Author(s): Vyacheslav Falikman, Nikolai Rozental, Alexandr Rozental
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: 192-199
Total Pages: 813
Language: English

Abstract: Statistics give the output of aggregates in Russia as 508.9 million m3 including 223.9 million m3 of gravel and crushed rock aggregate and 244.2 million m3 of sand. The total explored reserve of stone is estimated for the European region of the Federation to be 15.7 billion m3. In Russia, requirements for aggregates test methods are regulated by several standards. All the Russian standards are of a prescriptive nature. If the soluble silica quantity exceeds the specified, then the accelerated method is used with fine grained concrete specimens to give a deformation (expansion) measurement. Many of the tests undertaken in Russia have shown that accepted chemical criterion is not a reliable indicator. The results obtained with the long-term method based on concrete specimens tests over one year should be considered as the most reliable. Attention to “internal corrosion” in Russia is increasing every year, because its consequences are rather serious, and the causes of structural damage are intensifying. Practical examples of structural damage caused by AAR and their preventions are given. At present, AAR deterioration processes and the appropriate protection methods of concrete have been studied in detail, which has allowed for the active use of reactive rock in concrete.

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