Show simple item record

AuthorIrshidat, Mohammad R.
AuthorAl-Nuaimi, Nasser
AuthorRabie, Mohamed
Available date2024-04-17T11:38:13Z
Publication Date2021-02
Publication NameAdvances in Concrete Construction
Identifierhttp://dx.doi.org/10.12989/acc.2021.11.2.163
CitationIrshidat, M. R., Al-Nuaimi, N., & Rabie, M. (2021). Microstructure and mechanical behavior of cementitious composites with multi-scale additives. Advances in concrete construction, 11(2), 163-171.
ISSN2287-5301
URIhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85105042569&origin=inward
URIhttp://hdl.handle.net/10576/53953
AbstractThis paper studies the effect of using multi-scale reinforcement additives on mechanical strengths, damage performance, microstructure, and water absorption of cementitious composites. Small dosages of carbon nanotubes (CNTs) or polypropylene (PP) microfibers; 0.05%, 0.1%, and 0.2% by weight of cement; were added either separately or simultaneously into cement mortar. The experimental results show the ability of these additives to enhance the mechanical behavior of the mortar. The best improvement in compressive and flexural strengths of cement mortar reaches 28% in the case of adding a combination of 0.1% CNTs and 0.2% PP fibers for compression, and a combination of 0.2% CNTs and 0.2% PP fibers for flexure. Adding CNTs does not change the brittle mode of failure of plain mortar whereas the presence of PP fibers changes it into ductile failure and clearly enhances the fracture energy of the specimens. Scanning electron microscopic (SEM) images of the fracture surfaces highlights the role of CNTs in improving the adhesion between the PP fibers and the hydration products and thus enhance the ability of the fibers to mitigate cracks propagation and to enhance the mechanical performance of the mortar.
SponsorThis work was funded by the Office of Research and Graduate studies at Qatar University under project QUST-1-CAM-2019-1.
Languageen
PublisherTechno Press
Subjectcarbon nanotubes
cement mortar
damage
polypropylene fibers
strength
TitleMicrostructure and mechanical behavior of cementitious composites with multi-scale additives
TypeArticle
Pagination163-171
Issue Number2
Volume Number11
ESSN2287-531X
dc.accessType Abstract Only


Files in this item

FilesSizeFormatView

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record