Dynamic Undrained Shear Strength Behavior of Bentonite–Grouted Sand

In this paper the results of dynamic and static triaxial tests on uniformed graded sand of Firoozkooh (131) has been tested and examined, which has been injected by bentonite slurry in different concentrations. The bentonite slurry inside the soil texture, can lead to changes the mechanic and hydrau...

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Bibliographic Details
Published in:Geotechnical and geological engineering 2019-10, Vol.37 (5), p.4551-4563
Main Authors: Noori, Amir, Ziaie Moayed, Reza, Hassanlourad, Mahmud
Format: Article
Language:English
Subjects:
Bentonite
Civil Engineering
Dynamic tests
Earth and Environmental Science
Earth Sciences
Elasticity
Geotechnical Engineering & Applied Earth Sciences
Hydraulic properties
Hydrogeology
Impact resistance
Liquefaction
Original Paper
Sand
Shear strength
Slurries
Soil
Soil dynamics
Soil mechanics
Soil properties
Soil resistance
Soil texture
Soils
Storage modulus
Terrestrial Pollution
Texture
Waste Management/Waste Technology
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Summary:In this paper the results of dynamic and static triaxial tests on uniformed graded sand of Firoozkooh (131) has been tested and examined, which has been injected by bentonite slurry in different concentrations. The bentonite slurry inside the soil texture, can lead to changes the mechanic and hydraulic properties of soil. The results show that the bentonite being in sand leads to increase the liquefaction resistance. It was seen that when the slurry concentration is less than 7.5% it cannot have a significant impact on the liquefaction resistance, but by increasing the concentration of the slurry to 10%, liquefaction resistance increase effectively. The severity of liquefaction resistance changes for samples with low slurry concentrations was slow, and with increasing of slurry concentration was drastic. In addition it was observed that with increasing the concentration of slurry, the maximum dynamic modulus of elasticity increases. Due to obtained results, the soil liquefaction resistance through time and due to thixotropic process of bentonite, increases faster but after a specified period of time the rate of increase was slower. The static triaxial tests on injected bentonite samples were also compatible with dynamic testing results.
ISSN:0960-3182
1573-1529
DOI:10.1007/s10706-019-00930-0