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AuthorMilla, Jose
AuthorHassan, Marwa M.
AuthorRupnow, Tyson
AuthorAl-Ansari, Mohamed
AuthorArce, Gabriel
Available date2021-09-07T06:16:14Z
Publication Date2016
Publication NameTransportation Research Record
ResourceScopus
ISSN3611981
URIhttp://dx.doi.org/10.3141/2577-09
URIhttp://hdl.handle.net/10576/22766
AbstractSelf-healing concrete with microencapsulated calcium nitrate was investigated. The compressive strength of concrete admixed with microcapsules (as a percentage of the weight of the cement) was tested and compared with that of control specimens of the same mix design without microcapsules. Surface resistivity tests were conducted to quantify the surface permeability of the concrete specimens with and without microcapsules. The self-healing potential was measured by the modulus of elasticity test (ASTM C469), with measurements being taken before and after damage after 14 days. After the concrete was damaged by application of 80% of its ultimate load, all specimens were incubated by immersion in water. The results showed that the concentration of microcapsules added and the size of the microcapsules had a direct impact on the compressive strength of the concrete. Furthermore, the concrete specimens into which microcapsules were incorporated had greater surface resistivity than the control specimens. The recovery of the modulus of elasticity was analyzed according to the increase from the modulus of elasticity recorded after application of 80% of the sample's ultimate load and the increase relative to the initial modulus of elasticity of the concrete in the virgin state. Overall, the results of this study indicated that although microcapsules caused a decrease in the compressive strength of the concrete, they enhanced the self-healing capability of the concrete that was produced. To take advantage of the benefits of microcapsules, the authors recommend that future work evaluate the use of a dispersing agent to reduce the amount of microcapsules needed in the mix. 2016, National Research Council. All rights reserved.
Languageen
PublisherNational Research Council
SubjectCalcium
Compressive strength
Elastic moduli
Microstructure
Nitrates
Compressive strength of concrete
Concrete properties
Immersion in waters
Initial modulus of elasticity
Self-healing capabilities
Self-healing concretes
Surface permeability
Surface resistivity
Concretes
TitleEffect of self-healing calcium nitrate microcapsules on concrete properties
TypeArticle
Pagination69-77
Volume Number2577
dc.accessType Abstract Only


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