NDLI: Performance of scrap tire steel fibers in OPC and alkali-activated mortars

Content Provider	Springer Nature Link
Author	Onuaguluchi, Obinna Borges, Paulo H. R. Bhutta, Aamer Banthia, Nemkumar
Copyright Year	2017
Abstract	In this study, the mechanical strength, total porosity and corrosion performance of ordinary Portland cement (OPC), class F fly ash (PFA) and metakaolin (MK) alkali-activated mortars (AAM) reinforced with 1 and 2% mass fraction of scrap tire steel fibers (SSF) were investigated. The accelerated corrosion test comprised of immersion of specimens in a 5% NaCl solution and specimen electrical resistivity measurements over a three-month period. Thereafter, surface and internal corrosion of SSF in these matrices were also characterized using image analyses. Compressive and the four-point flexural strength were assessed before (28-day cured specimens) and after accelerated corrosion testing. The results indicate that SSF may be employed as discrete fiber reinforcement for OPC and AAM mixtures, as the former improves deformation and toughness of the mortars even after the accelerated corrosion testing. Nonetheless AAM presented higher porosity and reduced electrical resistivity than OPC mortars, probably due to alkali leaching. While the surface and internal corrosion performance of the SSF-reinforced MK-based AAM was poor, PFA-based AAM presented internal corrosion comparable to that of the OPC mortar, as well as the lowest surface corrosion among the mortars studied.
Starting Page	1
Ending Page	10
Page Count	10
File Format	PDF
ISSN	13595997
Journal	Materials and Structures
Volume Number	50
Issue Number	2
e-ISSN	18716873
Language	English
Publisher	Springer Netherlands
Publisher Date	2017-03-22
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Mortar Alkali-activated materials Mechanical strength Porosity Fiber corrosion Structural Mechanics Materials Science Theoretical and Applied Mechanics Operating Procedures, Materials Treatment Civil Engineering Building Materials
Content Type	Text
Resource Type	Article
Subject	Building and Construction Mechanics of Materials Materials Science Civil and Structural Engineering

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