Numerical simulation of the expansion behavior of field-exposed concrete blocks based on a modified concrete prism test

Author(s): Y. Kawabata, K. Yamada, S. Ogawa, Y. Sagawa
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: 230-237
Total Pages: 813
Language: English

Abstract: The performance testing of concrete is required to assess the alkali-silica reactivity and the potential for swelling for a wide variety of concretes. The performance should be assessed quantitatively in terms of the age and degree of expansion; simply identifying the expansion as harmful or innocuous is insufficient. It is imperative to consider the potential of expansion due to alkali-silica reactions (ASR), the service life of the structure, and the environmental conditions when assessing the real performance of the concrete in the structure. Therefore, it is necessary to develop numerical models to predict the expansion of concrete to re-assess concrete structures. As such, advanced models have been developed to understand the expansive behavior of concrete structures using numerical tools. Laboratory tests are also important to provide useful data for these numerical models, since these models often require the calibration of some unknown parameters according to the material being tested. To address this, the authors have developed a test method for concrete expansion, the alkali-wrapped concrete prism test (AW-CPT). The predicted expansion of field- exposed concrete blocks subjected to the AW-CPT was found to agree well with experimental results, as reported in a previous study. In this study, the AW-CPT results were verified by comparing field-exposure tests at different sites. Firstly, the expansion behaviors of concrete blocks exposed to different sites were compared by considering environmental conditions. Then, the AW-CPT results were compared with the results obtained from the numerical simulation.

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