Investigation of the Effect of Microcapsule Additive on Mechanical and Physical Properties of Concrete

Salmana, Reem T.; Abdul-Hamead, Alaa A.; Othman, Farhad M.

doi:10.30684/etj.v39i11.2091

	Investigation of the Effect of Microcapsule Additive on Mechanical and Physical Properties of Concrete
Engineering and Technology Journal
Article 3, Volume 39, Issue 11, November 2021, Pages 1639-1645 PDF (632.49 K)
Document Type: Research Paper
DOI: 10.30684/etj.v39i11.2091
Authors
Reem T. Salmana^* ; Alaa A. Abdul-Hamead; Farhad M. Othman
Materials Engineering Dept., University of Technology-Iraq, Alsina’a street, 10066 Baghdad, Iraq.
Abstract
Cracks are a fundamental problem in concrete, so this research investigates an experimental study of the effect of adding SiO2 on the self-healing behaviour of concrete. The study is done by studying the physical properties, microstructure, and mechanical properties of concrete. Microcapsules were prepared to contain (cement and nano SiO₂) in a (palettization (fluidize bed coating) method) with (5,10, and 15) % of cement weight. The ratio of the prepared concrete mixture was (1: 2: 4) and the ratio of water to cement (W / C) 0.45 by the weight of cement was also added as 0.6% Superplasticizer to all concrete mixtures. SiO2 MC is added with (2.5) % of the cement weight in the concrete mixture. In this study, porosity, density, and water absorption tests were performed to study the physical properties, compressive and bending strength to study mechanical properties. So, referring to the results, (SiO₂MC) was used as an effective effect in the self-healing cracking mechanism, and in improving the bending strength and compressive strength. Also, 10 % wt. was recorded as the best addition because it has a positive effect on properties to be applied in construction.
Highlights
Concrete mix has been reinforced with SiO₂ microcapsules to seal concrete cracks. Great Self-healing capacity of concrete that contain SiO₂microcapsules. Crack of concrete with SiO₂ microcapsules was self-healed in 28 days.
Keywords
Concrete encapsulated Self-healing; SiO2 MC Mechanical properties

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