| Title |
Clayey soil strength improvement by using alkali activated slag reinforcing / |
| Authors |
Žurinskas, Darius ; Vaičiukynienė, Danutė ; Stelmokaitis, Gediminas ; Doroševas, Viktoras |
| DOI |
10.3390/min10121076 |
| Full Text |
|
| Is Part of |
Minerals.. Basel : MDPI. 2020, vol. 10, iss. 12, art. no. 1076, p. 1-12.. ISSN 2075-163X |
| Keywords [eng] |
alkali activated slag ; clayey soil improvement ; reinforcement ; shear strength |
| Abstract [eng] |
There are many studies related tousing alkali activated binders for the improvement of clayey soil mechanical properties. Inthis study,alkali activated slag (AAS) for the improvement of clayeysoil strength was usedand it reinforced the clay. This paper presents results of an investigation on the utilization of ground-granulated blast-furnace slag inthereinforcement of clay soils. Therefore,significant cost savings couldbe achieved by using alkali activated slag as binding material. These samples were analyzed by X-Ray fluorescence analysis (XRF), X-Ray diffraction (XRD), scanning electron microscopy (SEM) and strength tests after the curing. The clay samples reinforced with AAS showed higher shear stress, cohesion and internal friction angle compared with the samples without reinforcement. The highest shear strength was achieved by using the highest amount of AAS (30%). This shear stress of the unreinforced clay samples could be increased from 63.2 to 137.4 kPa(117.4%) and from 123.2to 257.4 kPa (108.9%) when the normal stressvalue of100 and 500 kPa was used,respectively. The increase inshear strength is closely related to the compact contact zone between AAS and clay. Moreover, the new formed cementitious compounds of AAS had a positive influence on the shear strength of samples as well. |
| Published |
Basel : MDPI |
| Type |
Journal article |
| Language |
English |
| Publication date |
2020 |
| CC license |
|
