Evaluation of the Compressibility and Compressive Strength of a Compacted Cement Treated Laterite Soil for Road Application

Mengue, Emmanuel; Mroueh, Hussein; Lancelot, Laurent; Eko, Robert Medjo

doi:10.1007/s10706-018-0576-x

Cited by 18 publications

(17 citation statements)

References 14 publications

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“…From Figure 3, it is seen that MDD and OMC increase with cement percentage. The increasing trend of MDD and OMC with the increase of cement content in this study is consistent with previous research [98,99]. The influence of cement on the compaction properties of fine lateritic soil is clearly demonstrated in Figure 4.…”

Section: Compactionsupporting

confidence: 92%

“…Pozzolan (alumina/silica) + lime + water ⟶ calcium silicate hydrates + calcium aluminate hydrates The increasing cement content and curing time resulted in more hydration and pozzolanic reactions [98]. Thus, the agglomerated parts, indicating the calcium aluminate hydrate (CAH), calcium silicate hydrate (CSH), and calcium aluminosilicate hydrate (CASH) increased with cement content because of pozzolanic reactions between the calcium ions of cement and the silica and alumina of the lateritic soil [114,115].…”

Section: Microstructure Analysismentioning

confidence: 99%

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Strength and Durability of Cement-Treated Lateritic Soil

et al. 2021

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The transportation infrastructure, including low-volume roads in some regions, needs to be constructed on weak ground, implying the necessity of soil stabilization. Untreated and cement-treated lateritic soil for low-volume road suitability were studied based on Malaysian standards. A series of unconfined compressive strength (UCS) tests was performed for four cement doses (3%, 6%, 9%, 12%) for different curing times. According to Malaysian standards, the study suggested 6% cement and 7 days curing time as the optimum cement dosage and curing time, respectively, based on their 0.8 MPa UCS values. The durability test indicated that the specimens treated with 3% cement collapsed directly upon soaking in water. Although the UCS of 6% cement-treated specimens decreased against wetting–drying (WD) cycles, the minimum threshold based on Malaysian standards was still maintained against 15 WD cycles. On the contrary, the durability of specimens treated with 9% and 12% cement represented a UCS increase against WD cycles. FESEM results indicated the formation of calcium aluminate hydrate (CAH), calcium silicate hydrate (CSH), and calcium aluminosilicate hydrate (CASH) as well as shrinking of pore size when untreated soil was mixed with cement. The formation of gels (CAH, CSH, CASH) and decreasing pore size could be clarified by EDX results in which the increase in cement content increased calcium.

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Section: Compactionsupporting

confidence: 92%

Section: Microstructure Analysismentioning

confidence: 99%

Strength and Durability of Cement-Treated Lateritic Soil

et al. 2021

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“…e solution was stirred evenly and sealed and allowed to stand for 24 hours. en, the mass of the red clay was weighed according to a dry density of 1.35 g/ cm 3 , and the triaxial test sample was prepared by means of the compaction method. e sample is 80.0 mm in height and 39.1 mm in diameter.…”

Section: Effect Of Zinc Ions On the Mechanical Properties Of Red Claymentioning

confidence: 99%

“…e instrument used in this test was the S-4800 field emission scanning electron microscope produced by Japan Hi-Tech Co., Ltd. e maximum accelerating voltage is 30 kV, the maximum magnification is up to 800,000 times, the point resolution is 0.19 nm, and the line resolution is 0.14 nm. e contaminated soil was made into a soil sample with a dry density of 1.35 g/cm 3 and subjected to electron microscopy scanning.…”

Section: Scanning Electron Microscopy Testmentioning

confidence: 99%

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Analysis of the Mechanical Properties and Mechanism of Zinc Ion‐Contaminated Red Clay

Tang

Xue-jun

2021

Advances in Materials Science and Engineering

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To study the effects of different concentrations of zinc ions on the mechanical strength, material composition, and microstructure of red clay, a triaxial test, an x-ray diffraction test, an x-ray fluorescence spectrometry test, a scanning electron microscopy test, and a mercury intrusion test were carried out on contaminated soil to investigate the mechanisms of zinc ion-contaminated red clay. The results show that the higher the concentration of zinc ions, the smaller the shear strength and cohesion of the red clay. The internal friction angle is increased first and then decreased. From material composition, zinc ion makes montmorillonite and hemite disappear in red clay. With the increase of zinc ion concentration, quartz semiquantitative increase and kaolinite semiquantitative decrease and the content of SiO2, Fe2O3, and Na2O reduces. Microscopically, the structure of red clay changes from floc structure to granular and aggregate structure after the zinc ions are added, while the contact of the particles is converted to point contact. With the increase of the concentration of zinc ions, the porosity and the fractal dimension of the red clay gradually increase, and the stability of the granular structure is weakened.

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