A METHOD FOR INDUCING CONTROLLED CRACKS IN CONCRETE AND MEASURING THE EFFICIENCY OF SELF- HEALING AGENTS

Author(s): Amir Sidiq (1), Syed Adil Amzar Bin Syed Amerruddin(1), Rebecca Gravina(1), Sujeeva Setunge(1), Filippo Giustozzi(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: 1037-1042
Total Pages: 6
Language : English

Abstract: Durability and mechanical properties of concrete decreases with time due to cracking, resulting in contaminant ingress such as rapid chloride penetration and water particles transferred through these cracks to cause corrosion of the steel in reinforced concrete. The present research presents a method to induce cracking throughout the entire concrete sample’s volume homogenously. By placing a cylindrical concrete sample into an ad-hoc steel mould
and applying a compressive loading, confined axial and circumferential pressure is generated that induces controlled cracks in the sample. This procedure is used to induce a specific amount of cracks in the concrete sample hence triggering the repairing action of the self- healing agent. This method overcomes common drawbacks of self-healing efficiency measurements where a single crack is usually being generated by a standard flexural test on beams. X-ray tomography analysis was adopted to calibrate the internal state of damage generated into the sample.

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