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Interface shear strength properties of geogrid-reinforced steel slags using a large-scale direct shear testing apparatus

journal contribution
posted on 27.04.2021, 03:38 by Farshid Maghool, Arul Arulrajah, Mehdi Mirzababaei, Cherdsak Suksiripattanapong, Suksun Horpibulsuk
This research evaluates the shear strength properties of unreinforced and geogrid-reinforced ladle furnace slag (LFS), electric arc furnace slag (EAFS) and a blend comprising 50% LFS and 50% EAFS (LFS50+EAFS50) using the large direct shear testing apparatus (DST). The large DST results of unreinforced steel slags indicated that LFS had the lowest shear stress ratio at the peak shear strength among all samples, while LFS50+EAFS50 samples (both unreinforced and reinforced) demonstrated the highest shear stress ratio amongst the tested samples. A higher apparent cohesion value was achieved with the inclusion of biaxial geogrid in LFS and EAFS samples as compared to the triaxial geogrid interface. The observed behavior can be attributed to the larger aperture size of the biaxial geogrid compared to the triaxial geogrid leaving more void planar space for a direct interaction between slag particles. In contrast, the apparent cohesion of LFS50+EAFS50 without a geogrid interface was high and did not change significantly with the insertion of geogrid. Given, the range of internal friction angles for ordinary soils, studied slag by-products achieved internal friction angles in excess of 59° (with no geogrid interface) and these significant values proved highly beneficial application for these waste materials in pavement construction.

History

Volume

48

Issue

5

Start Page

625

End Page

633

Number of Pages

9

eISSN

1879-3584

ISSN

0266-1144

Publisher

Elsevier

Language

en

Peer Reviewed

Yes

Open Access

No

Acceptance Date

12/04/2020

External Author Affiliations

Swinburne University of Technology; Rajamangala University of Technology Isan, Suranaree University of Technology, Thailand

Era Eligible

Yes

Journal

Geotextiles and Geomembranes

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