Strength and volume change characteristics of clayey soils: Performance evaluation of enzymes

Tanveer Ahmed Khan, Mohd Raihan Taha, Mudasser Muneer Khan, Syyed Adnan Raheel Shah, Muhammad Asif Aslam, Ahsan Waqar, Ahsan Rehman Khan, Muhammad Waseem

Research output: Contribution to journalArticle

Abstract

This study was conducted to evaluate the strength and volume change characteristics of a sedimentary residual soil mixed with bentonite (S1) when treated with three different enzymes. In addition, three reference clays including bentonite, illite, and kaolinite were also treated with enzymes to study the effect on their strength characteristics. Soil samples prepared at the optimum moisture content (OMC) were sealed and cured for four months. After curing, reference clays were tested for unconfined compressive strength (UCS). For swell tests, the S1 soil samples were placed on porous stones, which were immersed in water to allow capillary soaking of the samples. S1 samples were allowed to dry at ambient temperature for shrinkage test until the rate of reduction in volume became negligible. On completion of swell tests, the samples were tested for UCS to determine the decrease in strength due to saturation. No increase in strength and decrease in volume change were observed for any of the enzymes and dosages. Field Emission Scanning Electron Microscope (FESEM) showed some dense packing of particles for treated samples, whereas X-ray diffraction (XRD) did not reveal any change; in fact, the pattern for untreated and treated soil samples were indistinguishable.

Original languageEnglish
Article number52
JournalMinerals
Volume10
Issue number1
DOIs
Publication statusPublished - Jan 2020

Fingerprint

volume change
Enzymes
enzyme
swell
bentonite
Soils
compressive strength
Bentonite
Compressive strength
clay
Clay
residual soil
soil
illite
kaolinite
Kaolinite
moisture content
X-ray diffraction
Field emission
saturation

Keywords

  • Enzymes
  • Shrinkage
  • Soil
  • Stabilization
  • Swell

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Geology

Cite this

Khan, T. A., Taha, M. R., Khan, M. M., Shah, S. A. R., Aslam, M. A., Waqar, A., ... Waseem, M. (2020). Strength and volume change characteristics of clayey soils: Performance evaluation of enzymes. Minerals, 10(1), [52]. https://doi.org/10.3390/min10010052

Strength and volume change characteristics of clayey soils : Performance evaluation of enzymes. / Khan, Tanveer Ahmed; Taha, Mohd Raihan; Khan, Mudasser Muneer; Shah, Syyed Adnan Raheel; Aslam, Muhammad Asif; Waqar, Ahsan; Khan, Ahsan Rehman; Waseem, Muhammad.

In: Minerals, Vol. 10, No. 1, 52, 01.2020.

Research output: Contribution to journalArticle

Khan, TA, Taha, MR, Khan, MM, Shah, SAR, Aslam, MA, Waqar, A, Khan, AR & Waseem, M 2020, 'Strength and volume change characteristics of clayey soils: Performance evaluation of enzymes', Minerals, vol. 10, no. 1, 52. https://doi.org/10.3390/min10010052
Khan, Tanveer Ahmed ; Taha, Mohd Raihan ; Khan, Mudasser Muneer ; Shah, Syyed Adnan Raheel ; Aslam, Muhammad Asif ; Waqar, Ahsan ; Khan, Ahsan Rehman ; Waseem, Muhammad. / Strength and volume change characteristics of clayey soils : Performance evaluation of enzymes. In: Minerals. 2020 ; Vol. 10, No. 1.
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