Shear strength performance of marine sediments stabilized using cement, lime and fly ash

•Direct shear test and mineral elemental analyses are carried out on sediment mixture stabilized using cement, lime and fly ash.•Chemical stabilization increases sample cohesion but affects friction angle significantly less.•The ratios of Al and Si for sediment samples stabilized using both lime and...

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Bibliographic Details
Published in:Construction & building materials Vol. 184; pp. 454 - 463
Main Authors: Furlan, Ana Paula, Razakamanantsoa, Andry, Ranaivomanana, Harifidy, Levacher, Daniel, Katsumi, Takeshi
Format: Journal Article
Language:English
Published: Elsevier Ltd 30.09.2018
Elsevier BV
Elsevier B.V
Elsevier
Subjects:
[SPI.GCIV.GEOTECH] Engineering Sciences [physics]/Civil Engineering/Géotechnique
[SPI]Engineering Sciences [physics]
ANALYSE STATISTIQUE
Analysis
Calcium oxides
Cements (Building materials)
CENDRE VOLANTE
Civil Engineering
Engineering Sciences
FLY ASH
Géotechnique
HYDRAULIC BINDER
LIANT HYDRAULIQUE
Marine sediments
MICROSTRUCTURE
Properties
RESISTANCE AU CISAILLEMENT
SEDIMENT
SHEAR STRENGTH
Soil shear strength
STATISTICAL ANALYSIS
France
Shear strength
Fly ash
Sediment
Statistical analysis
Hydraulic binder
Microstructure
CENDRE VOLANTE
FLY ASH
SHEAR STRENGTH
RESISTANCE AU CISAILLEMENT
STATISTICAL ANALYSIS
ANALYSE STATISTIQUE
LIANT HYDRAULIQUE
HYDRAULIC BINDER
MICROSTRUCTURE
ISSN:0950-0618, 1879-0526
Online Access:Get full text
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Summary:•Direct shear test and mineral elemental analyses are carried out on sediment mixture stabilized using cement, lime and fly ash.•Chemical stabilization increases sample cohesion but affects friction angle significantly less.•The ratios of Al and Si for sediment samples stabilized using both lime and cement are improved depending on curing times.•Fly ash causes the refinement of pore structure followed by pozzolanic reaction.•Statistical analysis demonstrates that the sediment elemental ratio does improve significantly the gain in cohesion. The combined effects of the chemical stabilization of sediments using lime, cement and fly ash on the sediment shear strength behavior are studied for geotechnical purposes. An elemental analysis is carried out to examine the chemical aspects of stabilized sediments resulting from a series of chemical reactions. Direct shear strength measurements are performed to investigate shear strength improvements and stress-strain behavior of mix samples. A statistical analysis using the principal component analysis and the ANOVA (ANalysis Of Variance) method is also conducted to examine the correlation between cohesion and elemental ratio resulting from the chemical reactions. The analysis of the principal components suggests that Ca and Si and Al and K have greater impact on cohesion than the other elements. However, the ANOVA method reveals that the elemental ratios of Si, Al and Ca produce less impact on the sediment overall gain in cohesion at 28 days of curing. These results demonstrate that the gain in cohesion mostly depends on some other physical parameters, which need to be yet examined. The prediction equation of the cohesion indicates each elemental component gain weight on the overall cohesion gain resulting from the chemical reactions. In short, the considered equation still needs to be refined, notably in terms of performing further laboratory testing.
ISSN:0950-0618
1879-0526
DOI:10.1016/j.conbuildmat.2018.06.231