THE EFFECTS OF CONTINUED HYDRATION OF UNDAMAGED MATERIAL ON APPARENT HEALING INDICES IN CEMENTITIOUS MATERIALS

Author(s): Robert Davies (1), Cristina De Nardi (2), Anthony Jefferson (1)
Paper category: Proceedings
Book title: SynerCrete’18 International Conference on Interdisciplinary Approaches for Cement-based Materials and Structural Concrete
Editor(s): Miguel Azenha, Dirk Schlicke, Farid Benboudjema, Agnieszka Jędrzejewska
ISBN: 978-2-35158-202-2
e-ISBN: 978-2-35158-203-9
Publisher: RILEM Publications SARL
Publication year: 2018
Pages: 1127-1131
Total Pages: 6
Language : English

Abstract: This paper addresses the effects of continuing hydration in undamaged material on reported healing for cementitious materials. Numerical simulations show how the increase of strength in self-healing test specimens can be due to a combination of ageing material properties and healing. A numerical model framework combines a hydration model, used to predict material property changes, and a damage mechanics approach, to simulate the cracking and then healing. An experimental study using natural hydraulic lime base mortars is used to illustrate
the simulation capability and to examine the contribution to strength increase after healing. The lime mortar cube specimens have a first damage range of between 14 and 84 days old and then are healed for two different periods, 14 and 28 days, in water. The insight gained from this one dataset, on the composition of the strength increase due to either continued hydration or healing, will be useful to other researchers investigating self-healing behaviour in
cementitious materials.

Online publication : 2018
Publication type : full_text
Public price (Euros) : 0.00