Self-sealing cementitious materials by utilizing superabsorbent polymers

Alkarawi, Rasha Jasim; Vakil, Merool

doi:10.30772/qjes.2024.147403.1152

	Self-sealing cementitious materials by utilizing superabsorbent polymers
Al-Qadisiyah Journal for Engineering Sciences
Article 6, Volume 17, Issue 3, September 2024, Pages 250-254 PDF (484.7 K)
Document Type: Research Paper
DOI: 10.30772/qjes.2024.147403.1152
Authors
Rasha Jasim Alkarawi^* ; Merool Vakil
Forensic Structural Engineering Division, School of Engineering and Technology, National Forensic, Sciences University, Gandhinagar Gujarat, India
Abstract
A current direction in scientific research is the search for technological solutions that provide high reliability for building materials. Incorporating self-sealing agents during the design phase makes concrete more eco-friendly by reducing the maintenance processes and extending concrete's lifespan which leads to reducing the need to produce cement causing a lot of CO2 emissions. As a consequence, this investigation describes an attempt to assess the performance of superabsorbent polymer (SAP) as a self-sealing agent. In the experimental work, two different particle sizes were taken into consideration, SAP1 (425–600μm) and SAP2 (> 600 μm) and for preparing SAP-based concrete and the ratio of SAP was (0.3% wt of cement) with water/ cement (0.4). The regular test was performed for compressive strength at the age of 28 days and the pre-crack phase to generate the initial crack started after 28 days. Two series of sealing periods Cy4th and Cy10th under wet-dry cycles were taken to promote the sealing process. The DZM (Digital Zoom Microscope) system for microscopic analysis was used to detect the self-sealing phenomenon and the width of the sealing on the concrete cracks' surface by using specialist software (image process). The outcomes demonstrated that there was a positive effect of using SAP as a sealing agent, depending on particle size the SAP2 healed the crack up to 0.15mm and the percentage of partially sealing at Cy4th was 64% compared to the other mixes.
Keywords
Self-healing; Healing agents; Durability; Fracture formation; Maintenance

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