Effect of the Type of Lateritic Soil on the Effectiveness of Geomechanical Improvement Using a Low Quantity of Cement for Sustainable Road Construction
Abstract
:1. Introduction
2. Materials and Experimental Procedures
2.1. Characteristics of the Raw Materials
2.2. Experimental Procedures
2.2.1. Physical and Compaction Properties
2.2.2. Characterisation of the Mechanical Properties
3. Results and Discussion
3.1. Effect of Cement on the Plasticity and Compaction Parameters of Soils
3.2. Effect of Cement on Mechanical Properties
3.2.1. CBR Index
3.2.2. Unconfined Compressive Strength
Effect of Cement Content and Curing Time on Unconfined Compressive Strength
Effect of Cement Content on the Failure Mechanism of Soils
3.2.3. Young’s Modulus (E30) and Tensile Strength
Young’s Modulus (E30)
Tensile Strength
3.2.4. Direct Shear Strength
Stress–Strain Curves
Intrinsic Curves
4. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Mineral Compositions (%) | LAS | LAK |
---|---|---|
Quartz | 13 | 17 |
Goethite | 7 | 14 |
Hematite | 7 | 7 |
K-Feldspars | 0 | 4 |
Tridymite | 9 | 0 |
Total clay minerals (kaolinite and illite) | 64 | 58 |
Properties | LAS | LAK |
---|---|---|
Specific gravity of grains (kN/m3) | 27.8 | 30.0 |
Gravel (%) | 61.7 | 43 |
Sand (%) | 13.3 | 29 |
Silt (%) | 11 | 22 |
Clay (%) | 14 | 6 |
Fine particles (<80 µm) | 32 | 30.5 |
Increase of fine particles after the CBR test (%) | 2 | 8.5 |
Dmax (mm) | 25 | 16 |
ωn (%) | 0.73 | 1.3 |
Plastic index (%) | 15 | 19 |
Plastic limit (%) | 22 | 28.5 |
Liquid limit (%) | 37.1 | 47.5 |
m*IP = IP*passing of sieve 0.425 mm | 516 | 726 |
MBV (g/100 g) | 1.33 | 0.83 |
USCS classification | GC | SC |
HRB classification | A2-6 | A2-7 |
OWC (%) | 10.9 | 11.9 |
MDD (kN/m3) | 20.3 | 20.3 |
Immediate CBR at 95% of MDD (%) | 36 | 65 |
Soaked CBR at 95% of MDD (%) | 16 | 49 |
Cement Content | Plasticity | Compaction Parameters | |||
---|---|---|---|---|---|
LL (%) | LP (%) | IP (%) | ɣdopt (kN/m3) | ωopt (%) | |
LAS 0% | 28.0 | 13.0 | 15.0 | 20.3 | 10.9 |
LAS 1% | 34.0 | 19.0 | 15.0 | 20.3 | 11.4 |
LAS 2% | 42.0 | 28.0 | 14.0 | 20.4 | 11.4 |
LAS 3% | 44.0 | 31.0 | 13.0 | 20.6 | 11.4 |
LAK 0% | 47.5 | 28.5 | 19.0 | 20.3 | 11.9 |
LAK 1% | 56.0 | 41.0 | 15.0 | 20.6 | 10.8 |
LAK 2% | 56.0 | 43.0 | 13.0 | 20.7 | 9.1 |
LAK 3% | 55.0 | 43.0 | 12.0 | 21.0 | 10.3 |
Curing Time (Days) | LAS | LAK | |||||||
---|---|---|---|---|---|---|---|---|---|
Cement Content (%) | |||||||||
0 | 1 | 2 | 3 | 0 | 1 | 2 | 3 | ||
UCS (kPa) | 7 | 746 | 1391 | 2205 | 3096 | 322 | 805 | 897 | 1417 |
28 | 871 | 929 | 2399 | 3666 | 322 | 953 | 1018 | 1488 | |
E (MPa) | 7 | 63 | 133 | 209 | 353 | 47 | 103 | 123 | 216 |
28 | 88 | 97 | 344 | 428 | 47 | 83 | 136 | 149 | |
360 | 136 | 149 | 530 | 659 | 73 | 128 | 209 | 228 | |
Rt (kPa) | 7 | 48 | 56 | 128 | 216 | 86 | 105 | 94 | 76 |
28 | 16 | 40 | 272 | 512 | 88 | 130 | 128 | 128 | |
360 | 27 | 67 | 453 | 853 | 147 | 217 | 213 | 213 |
LAS + Cement (%) | LAK + Cement (%) | ||||||||
---|---|---|---|---|---|---|---|---|---|
σn (kPa) | Parameters | 0 | 1 | 2 | 3 | 0 | 1 | 2 | 3 |
50 | τ (kPa) | 92.98 | 104.35 | 118.00 | 123.86 | 119.43 | 108.87 | 110.70 | 253.98 |
100 | 169.23 | 139.67 | 169.74 | 265.13 | 138.72 | 151.44 | 147.12 | 296.41 | |
200 | 222.14 | 268.04 | 322.26 | 389.02 | 242.23 | 257.84 | 238.88 | 328.86 | |
50 | εpic (%) | 6.64 | 1.88 | 1.65 | 2.20 | 25.46 | 3.61 | 3.02 | 1.89 |
100 | 7.09 | 4.98 | 1.98 | 1.57 | 26.37 | 2.16 | 2.22 | 1.77 | |
200 | 8.22 | 5.60 | 2.43 | 4.48 | 23.94 | 12.29 | 7.26 | 1.60 | |
c (kPa) | 67.8 | 42.7 | 42.6 | 71.1 | 65.8 | 65.0 | 68.8 | 237.6 | |
ϕ (°) | 33.7 | 43.2 | 50.5 | 54.3 | 30.3 | 37.3 | 35.3 | 22.8 |
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Mbengue, M.T.M.; Lawane Gana, A.; Messan, A.; Mone, O.; Pantet, A. Effect of the Type of Lateritic Soil on the Effectiveness of Geomechanical Improvement Using a Low Quantity of Cement for Sustainable Road Construction. Materials 2023, 16, 6891. https://doi.org/10.3390/ma16216891
Mbengue MTM, Lawane Gana A, Messan A, Mone O, Pantet A. Effect of the Type of Lateritic Soil on the Effectiveness of Geomechanical Improvement Using a Low Quantity of Cement for Sustainable Road Construction. Materials. 2023; 16(21):6891. https://doi.org/10.3390/ma16216891
Chicago/Turabian StyleMbengue, Marie Thérèse Marame, Abdou Lawane Gana, Adamah Messan, Ousseni Mone, and Anne Pantet. 2023. "Effect of the Type of Lateritic Soil on the Effectiveness of Geomechanical Improvement Using a Low Quantity of Cement for Sustainable Road Construction" Materials 16, no. 21: 6891. https://doi.org/10.3390/ma16216891