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Effect of suction on the mechanical behaviour of unsaturated compacted clay–sand mixtures Cover

Effect of suction on the mechanical behaviour of unsaturated compacted clay–sand mixtures

Open Access
|Sep 2022

Figures & Tables

Figure 1

Grain size distribution curves of the tested soils.
Grain size distribution curves of the tested soils.

Figure 2

Atterberg limits of the tested soils.LL: liquid limit, PI: plasticity index
Atterberg limits of the tested soils.LL: liquid limit, PI: plasticity index

Figure 3

LL and PI versus SP.LL: liquid limit, PI: plasticity index, SP: sand percentage
LL and PI versus SP.LL: liquid limit, PI: plasticity index, SP: sand percentage

Figure 4

Compaction characteristics for the kaolinite 100K and 75K25S, 50K50S mixtures.
Compaction characteristics for the kaolinite 100K and 75K25S, 50K50S mixtures.

Figure 5

Compacted sample device.
Compacted sample device.

Figure 6

E50 modulus definition.
E50 modulus definition.

Figure 7

Wetting–drying paths of compacted samples of kaolinite 100K and mixtures 75K25S and 50K50S.
Wetting–drying paths of compacted samples of kaolinite 100K and mixtures 75K25S and 50K50S.

Figure 8

The relationship between: a) void ratio eSl, b) water content wsl and c) suction ssl of shrinkage limit versus SP.SP: sand percentage
The relationship between: a) void ratio eSl, b) water content wsl and c) suction ssl of shrinkage limit versus SP.SP: sand percentage

Figure 9

Void ratio for wetting paths of different soils compacted in SPO conditions.
Void ratio for wetting paths of different soils compacted in SPO conditions.

Figure 10

Normalised water contents for the wetting paths of different soils compacted in SPO conditions.
Normalised water contents for the wetting paths of different soils compacted in SPO conditions.

Figure 11

Relationship between a) deviatoric stress and axial strain for kaolinite and mixture samples, b) UCS and sand percentage, in SPO conditions. UCS: unconfined compressive strength.
Relationship between a) deviatoric stress and axial strain for kaolinite and mixture samples, b) UCS and sand percentage, in SPO conditions. UCS: unconfined compressive strength.

Figure 12

Relationship between E50 modulus and sand percentage for kaolinite and mixture samples in SPO conditions.
Relationship between E50 modulus and sand percentage for kaolinite and mixture samples in SPO conditions.

Figure 13

Relationship between UCS and a) water content, b) suction for 100K and mixture samples.. UCS: unconfined compressive strength
Relationship between UCS and a) water content, b) suction for 100K and mixture samples.. UCS: unconfined compressive strength

Figure 14

Relationship between E50 modulus and a) water content and b) suction for 100K and mixture samples.
Relationship between E50 modulus and a) water content and b) suction for 100K and mixture samples.

Figure 15

Relationship between E50 modulus and UCS. UCS: unconfined compressive strength.
Relationship between E50 modulus and UCS. UCS: unconfined compressive strength.

Geotechnical properties of the tested soils_

CcCu<80 μm,<2 μm,LL,PL,PI,wSPO,ρdmax,

Material %%%%%%g/cm3
Kaolinite 100K (Kheirbek-Saoud 1994) [33]0.4411.671005840202017.21.7
Sand0.673,1500-----
75K25S0.2525774331.718.513.215.81.77
50K50S0.067913.04533625.114.810.3121.93

Comparison between measured and correlated γdmax and wSPO_

SoilsLL,MeasuredCorrelatedErrorMeasuredCorrelatedError

%wSPO, %wSPO, %ΔwSPO, %γdmax, kN/m3γdmax, kN/m3Δγdmax, kN/m3
100K4017.218.51.31716.90.1
75K25S31.715.815.40.417.717.70
50K50S25.11212.80.819.318.31.0

Initial conditions of drying–wetting test_

MaterialLL,wSPO,ρdmax,si measured,si correlated,

%%g/cm3MPaMPa
100K4017.21.71.120.729
75K25S31.715.81.770.590.644
50K50S25.1121.930.3980.339
DOI: https://doi.org/10.2478/sgem-2022-0016 | Journal eISSN: 2083-831X | Journal ISSN: 0137-6365
Language: English
Page range: 175 - 189
Submitted on: Oct 27, 2021
Accepted on: Mar 21, 2022
Published on: Sep 9, 2022
Published by: Wroclaw University of Science and Technology
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year

© 2022 Salima Bouchemella, Said Taibi, published by Wroclaw University of Science and Technology
This work is licensed under the Creative Commons Attribution 4.0 License.