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Plasticity index of bar soil
| Designation | Sample1 | Sample2 | Sample3 | Average | GTR limit |
|---|---|---|---|---|---|
| IP [%] | 22 | 22 | 22 | 22 | 12˂IP≤25 (Medium clayey sand) |
Summary of geotechnical properties of treated sandy-clayey soil compared to CEBTP sub-base requirements (1984 and 2019 editions)
| PCW rate | Passing to 80 µm [%] | ɣd OPM [T/m3] | Wopm [%] | IP [%] | ICBR à 95% OPM [%] | Swelling | Comment | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| obtained | desired | obtained | desired | obtained | desired | obtained | desired | obtained | desired | obtained | desired | ||
| - 0.0% | 48 | 10 à 30 % | 2 | 1.9 à 2.1 | 12.1 | 7 à 13% | 22 | 5 à 20 | 23 | ≥30 (25 pr T1 et 35 pr T4 and T5) | 0.17 | 2.50% | unfit |
| - 2.5% | 35 | 10 à 30 % | 2.03 | 1.9 à 2.1 | 11 | 7 à 13% | 18.4 | 5 à 20 | 24 | ≥30 (25 pr T1 et 35 pr T4 and T5) | 0.26 | 2.50% | unfit |
| - 5% | 32 | 10 à 30 % | 2.06 | 1.9 à 2.1 | 10.9 | 7 à 13% | 18.3 | 5 à 20 | 30 | ≥30 (25 pr T1 et 35 pr T4 and T5) | 0.2 | 2.50% | unfit |
| - 7.5% | 28 | 10 à 30 % | 2.08 | 1.9 à 2.1 | 10.1 | 7 à 13% | 18 | 5 à 20 | 34 | ≥30 (25 pr T1 et 35 pr T4 and T5) | 0.19 | 2.50% | suitable |
| - 10% | 28 | 10 à 30 % | 2.09 | 1.9 à 2.1 | 10.1 | 7 à 13% | 13.4 | 5 à 20 | 37 | ≥30 (25 pr T1 et 35 pr T4 and T5) | 0.19 | 2.50% | suitable |
| - 12.5% | 27 | 10 à 30 % | 2.1 | 1.9 à 2.1 | 10 | 7 à 13% | 13 | 5 à 20 | 42 | ≥30 (25 pr T1 et 35 pr T4 and T5) | 0.18 | 2.50% | suitable |
| - 15% | 27 | 10 à 30 % | 2.1 | 1.9 à 2.1 | 10.1 | 7 à 13% | 14.3 | 5 à 20 | 48 | ≥30 (25 pr T1 et 35 pr T4 and T5) | 0.19 | 2.50% | suitable |
Methylene blue value of bar soil
| Designation | Sample1 | Sample2 | Sample3 | Average | GTR limit |
|---|---|---|---|---|---|
| VBS [-] | 1 | 1 | 1.02 | 1 | 0.2 < VBS ≤ 1.5(sandy clay) |
Mineralogical characterization of bar soil
| Mineral | Chemical formula | Estimated proportion [%] |
|---|---|---|
| Quartz | SiO2 | 58 |
| Kaolinite | Al2Si2O5(OH)4 | 28 |
| Illite/muscovite | KAl2(AlSi3O10)(OH)2 | 12 |
| Others / amorphous | (Fe-oxydes, résidus) | 2 |
Chemical composition of bar soil
| Oxide | SiO2 | Al2O3 | Fe2O3 | K2O | Na2O | CaO | MgO | H2O structural |
|---|---|---|---|---|---|---|---|---|
| Estimated proportion (%) | 62 | 24 | 2 | 1 | 0.5 | 0.3 | 0.2 | 10 |
Geotechnical characterization of sandy-clayey sand (foundation layer)
| Geotechnical characteristics | Sandy-clay sand (bar soil) | CEBTP specification | Comment |
|---|---|---|---|
| - grain size [mm] | 0/2 | 0/2 à 0/10 | suitable |
| - passing to 80 µm [%] | 48 | 10 à 30 % | unfit |
| - IP (Plasticity index) [%] | 22 | 5 à 20 | unfit |
| - f × IP [-] | 1056 | 100 à 500 | unfit |
| - ɣd OPM (the optimal dry density) [T/m3] | 2 | 1.9 à 2.1 | suitable |
| - Wopm (optimal water content) [%] | 12.1 | 7 à 13% | suitable |
| - Swelling [%] | 0.17 | 2.50% | suitable |
| ICBR (CBR Index) à 95% OPM (optimum) [%] | 23 | ≥30 (25 for T1 et 35 pr T4 and T5) | unfit |
Mineralogical characterization of pulverized ceramic waste
| Mineral | Chemical formula | Estimated proportion [%] |
|---|---|---|
| Quartz | SiO2 | 70 |
| Feldspaths (Na/K) | NaAlSi3O8 / KAlSi3O8 | 15 |
| Glass / mullite / amorphous | (Al–Si / amorphous) | 15 |
Sieve size analysis results of the bar soil sample
| Designation | Maximum diameter (Dmax) [mm] | Under 2 mm [%] | Under 0.315 mm [%] | Under 0.08 mm [%] |
|---|---|---|---|---|
| Sample1 | 2 | 100 | 71 | 48 |
| Sample2 | 2 | 100 | 72 | 49 |
| Sample3 | 2 | 100 | 69 | 47 |
| Average | 2 | 100 | 71 | 48 |
| Standard deviation | 0 | 0 | 1.5 | 1 |
Chemical composition of pulverized ceramic waste
| Oxide | SiO2 | Al2O3 | Fe2O3 | K2O | Na2O | CaO | MgO |
|---|---|---|---|---|---|---|---|
| Estimated [%] | 70 | 20 | 2 | 3 | 2 | 1.2 | 0.8 |