Cyclic Behaviour and Durability Analysis of Sand Grouted with Optimum Colloidal Silica Content

The main objective of the current research is to study the dynamic behaviour of colloidal silica treated grout. The treatment of foundation soil with colloidal silica improves the cyclic strength of the soil, which has the potential to reduce damages in buildings during earthquakes. Cyclic triaxial...

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Bibliographic Details
Published in:Arabian journal for science and engineering (2011) 2020-10, Vol.45 (10), p.8129-8144
Main Authors: Krishnan, Jiji, Sharma, Prashansha, Shukla, Shruti, Pancholi, Vasu, Dwivedi, Vinay Kumar
Format: Article
Language:English
Subjects:
Colloids
Damping ratio
Drying
Durability
Earthquake damage
Engineering
Fatigue strength
Grout
Humanities and Social Sciences
multidisciplinary
Research Article-Civil Engineering
Sand
Science
Seismic response
Shear modulus
Silicon dioxide
Soil dynamics
Soil strength
Soils
Water table
Wetting
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Summary:The main objective of the current research is to study the dynamic behaviour of colloidal silica treated grout. The treatment of foundation soil with colloidal silica improves the cyclic strength of the soil, which has the potential to reduce damages in buildings during earthquakes. Cyclic triaxial tests were conducted at various double amplitudes to understand the cyclic resistance of the colloidal silica grouted sand. The test results of untreated samples at different relative densities were compared with the treated samples having the same relative densities. The present study revealed that the optimum percentage of colloidal silica decreases with an increase in relative density. The grout inside the treated area would undergo geothermal and water table changes. Wetting and drying cycles were studied to understand the durability of the above-mentioned grout. The samples sustained 18 wetting and drying cycles which in turn proves its superior durability characteristics. It was observed that the confining pressure, total energy capacity, as well as brittleness index and colloidal silica percentages, are some factors determining strength characteristics. Furthermore, the addition of colloidal silica in sand improves the cyclic resistance strength, damping ratio, and the shear modulus.
ISSN:2193-567X
1319-8025
2191-4281
DOI:10.1007/s13369-020-04643-y