Microstructural analysis of ASR in concrete - accelerated testing versus natural ex- posure

Author(s): Andreas Leemann, Ingmar Borchers, Mahdieh Shakoorioskooie, Michele Giffa, Christoph Müller, Pietro Lura
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: 222-229
Total Pages: 813
Language: English

Abstract: Accelerated tests are used to assess the expansion potential of concrete due to ASR. A key question in regard to such tests is the applicability of the results to concrete structures. Expansion of concrete prisms stored in accelerating conditions has been compared to the one determined for blocks produced with the same concrete and exposed to natural conditions in several studies. This allows drawing conclusions about the meaningfulness of the accelerated test. However, such comparisons usually only include length measurements. In this study, the microstructure of a specific concrete mixture produced within the framework of the PARTNER project is tested in accelerated conditions and exposed to field conditions for several years. ASR products are characterized with scanning electron microscopy and Raman microscopy. Additionally, crack patterns are analysed in 3D with X-ray computer tomography.

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

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