Self-healing Behaviour of Ultra-High-Performance Concrete Under Constant Load
Date
2023
Authors
Alameri, M.
Mohamed Sadakkathulla, M.
Sheikh, A.H.
Elchalakani, M.
Editors
Advisors
Journal Title
Journal ISSN
Volume Title
Type:
Conference paper
Citation
Proceedings of the 19th International Symposium of the International Federation for Structural Concrete (fib 2023): Volume 1, Building for the Future: Durable, Sustainable, Resilient, as published in Lecture Notes in Civil Engineering, 2023, vol.349 (LNCE), pp.506-513
Statement of Responsibility
Mohammad Alameri, Mohamed Mohamed Sadakkathulla, Abdul Hamid Sheikh, and Mohamed Elchalakani
Conference Name
19th International Symposium of the International Federation for Structural Concrete (fib) (5 Jun 2023 - 7 Jun 2023 : Istanbul, Türkiye)
Abstract
Concrete technology has been developing remarkably in recent decades. One of the most significant developments is the invention of ultra-highperformance concrete (UHPC), which can cope with the higher level of demands associated with complex structures, such as long-span bridges. The strength and durability of this type of concrete are quite high. However, this kind of concrete needs a very low water-to-cement ratio (up to 0.2); consequently, the hydrated cement particles could not exceed 26%. Hence, the cracks may appear frequently due to the autogenous shrinkage. To overcome autogenous shrinkage, a superabsorbent polymer (SAP) is used as an internal curing agent to subsequently increase the hydration of anhydrous cement particles. Much research has focused on inducing cracks under different curing conditions and observing the behaviour of the specimens when re-loaded, whether the cracks that had been induced had sealed during the curing time, and whether strength had been gained after re-loading. As such, in this research, a constant cracking load was applied to a pull-out specimen for 28 days under two different curing conditions (water curing and wet and dry cycles). The mix design for these specimens was UHPC with SAP of 0.3% and 0.4% of the total binder. Also, a reference UHPC mix has been used for comparison purposes. The results show that using SAP in the UHPC mix has the ability to boost the self-healing mechanism present in ultra-high-performance concrete. Additionally, tensile strength behaviour improved in the UHPC mix with 0.3% SAP.
School/Discipline
Dissertation Note
Provenance
Description
Proceedings of the fib Symposium 2023 - Volume 1
Access Status
Rights
© The Author(s), under exclusive license to Springer Nature Switzerland AG 2023