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

被引：40

作者：

Maghool, Farshid ^{[1
]}

Arulrajah, Arul ^{[1
]}

Mirzababaei, Mehdi ^{[2
]}

Suksiripattanapong, Cherdsak ^{[3
]}

Horpibulsuk, Suksun ^{[4
,5
]}

机构：

[1] Swinburne Univ Technol, Dept Civil & Construct Engn, Hawthorn, Vic 3122, Australia

[2] Cent Queensland Univ, Sch Engn & Technol, Melbourne, Vic 3000, Australia

[3] Rajamangala Univ Technol Isan, Civil Engn, Nakhon Ratchasima 30000, Thailand

[4] Suranaree Univ Technol, Dept Sch Civil Engn, Nakhon Ratchasima 30000, Thailand

[5] Suranaree Univ Technol, Ctr Excellence Innovat Sustainable Infrastruct De, Nakhon Ratchasima 30000, Thailand

来源：

GEOTEXTILES AND GEOMEMBRANES | 2020年 / 48卷 / 05期

关键词：

Geosynthetics; Steel slag aggregates; Industrial waste; Large direct shear; Geogrid; Shear stress ratio;

D O I：

10.1016/j.geotexmem.2020.04.001

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

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 degrees (with no geogrid interface) and these significant values proved highly beneficial application for these waste materials in pavement construction.

引用

页码：625 / 633

页数：9

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