ASSESSMENT OF DAMAGE DUE TO ALKALI-SILICA REACTION THROUGH MICROSCOPIC AND MECHANICAL TOOLS

Author(s): Sanchez, L. F. M., Fournier, B. Jolin M. and Bastien, J.
Paper category: Conference
Book title: XIII International Conference on Durability of Building Materials and Components - XIII DBMC
Editor(s): Marco Quattrone, Vanderley M. John
Print ISBN: none
e-ISBN: 978-2-35158-149-0
Publication year: 2015
Pages: 236-243
Total Pages: 8
Language: English

Abstract: Alkali-silica reaction (ASR) is one of the main processes affecting the durability and reducing the service life of concrete structures worldwide. Some laboratory tools were developed over the years for evaluating either the actual damage degree or the potential for further distress of concrete damaged due to ASR and among those, the Stiffness Damage Test (SDT) and the Damage Rating Index (DRI) seems to have a great potential. This work presents the evaluation of either the mechanical or microscopic features of concrete affected by ASR in the laboratory through the use of both SDT and DRI. The analyses were carried out on three types of concrete (25, 35, 45 MPa) and two types of highly-reactive aggregates (Texas sand and New Mexico gravel). Four expansion levels (0.05%, 0.12%, 0.20% and 0.30%), were chosen for analysis over this research. The results show that both tools could efficiently detect the damage’s degree in the samples for all the mixtures analyzed. Moreover, their coupling enables a better understanding about ASR damage and development.

Online publication: 2015
Publication Type: full_text
Public price (Euros): 0.00