Have a personal or library account? Click to login

Shear Strength Enhancement of Cemented Reinforced Sand: Role of Cement Content on the Macro-Mechanical Behavior

Studia Geotechnica et Mechanica
Volume 41 (2019): Issue 4 (December 2019)
By:
Open Access
|Dec 2019

Figures & Tables

Figure 1

Scanning electron microscope view (SEM) of Chlef sand, Della et al. (2014).
Scanning electron microscope view (SEM) of Chlef sand, Della et al. (2014).

Figure 2

Grain size distribution curve of Chlef sand and cemented sand.
Grain size distribution curve of Chlef sand and cemented sand.

Figure 3

Materials used in this study: (a) Sand, (b) Cement, (c) Sample preparation.
Materials used in this study: (a) Sand, (b) Cement, (c) Sample preparation.

Figure 4

Influence of water content on the behavior of Chlef sand (σn = 100 kPa, Dr = 80%), (a): Shear stress as a function of horizontal displacement, (b): Vertical displacement as a function of horizontal displacement.
Influence of water content on the behavior of Chlef sand (σn = 100 kPa, Dr = 80%), (a): Shear stress as a function of horizontal displacement, (b): Vertical displacement as a function of horizontal displacement.

Figure 5

Cement content influence on the shear strength of cemented sand (σn = 100 kPa), (a) ω = 3%, (b) ω = 7%, (c) ω = 10%.
Cement content influence on the shear strength of cemented sand (σn = 100 kPa), (a) ω = 3%, (b) ω = 7%, (c) ω = 10%.

Figure 6

Cement content influence on the vertical displacement of cemented sand (σn = 100 kPa), (a) ω = 3%, (b) ω = 7%, (c) ω = 10%.
Cement content influence on the vertical displacement of cemented sand (σn = 100 kPa), (a) ω = 3%, (b) ω = 7%, (c) ω = 10%.

Figure 7

Evolution of the maximum shear strength of cemented reinforced sand as function of cement content (case of a water content ω = 10%).
Evolution of the maximum shear strength of cemented reinforced sand as function of cement content (case of a water content ω = 10%).

Figure 8

Influence of the cement content on the mechanical properties of cemented sand: (a) variation of the interlocking or intercept cohesion; (b) Variation of the friction angle.
Influence of the cement content on the mechanical properties of cemented sand: (a) variation of the interlocking or intercept cohesion; (b) Variation of the friction angle.

Figure 9

Influence of curing time on shear strength of cemented sand (σn = 100 kPa), (a) after 7 days, (b) 14 days, (c) 28 days.
Influence of curing time on shear strength of cemented sand (σn = 100 kPa), (a) after 7 days, (b) 14 days, (c) 28 days.

Figure 10

Influence of curing time on deformability of cemented sand (σn = 100 kPa), (a) after 7 days, (b) 14 days, (c) 28 days.
Influence of curing time on deformability of cemented sand (σn = 100 kPa), (a) after 7 days, (b) 14 days, (c) 28 days.

Figure 11

Influence of cure time on the maximum shear strength of cemented sand, (a) Normal stress of 100 kPa, (b) Normal stress of 200 kPa, (c) Normal stress of 400 kPa,.
Influence of cure time on the maximum shear strength of cemented sand, (a) Normal stress of 100 kPa, (b) Normal stress of 200 kPa, (c) Normal stress of 400 kPa,.

Figure 12

Influence of curing time on the mechanical characteristics of cemented sand.
Influence of curing time on the mechanical characteristics of cemented sand.

Chemical and mineralogical compositions of the cement_

CEM II/A
Chemical compositions (%)Mineralogical compositions (%)
SiO220.58C3S57.79
Al2O34.90C2S20.47
Fe2O34.70C3A7.20
CaO62.8C4AF11.49
SO32.28
MgO0.53
K2O0.42
Na2O0.12
Free lime2.17

Summary of our results with those found in the literature_

7 days14 days28 days
Cc (%)C (kPa)φ (°)C (kPa)φ (°)C (kPa)φ (°)
012.9236.5412.9236.5412.9236.54
2.547.2936.9107.0437.03122.9740.05
564.3138.41114.2242.19150.3841.51
7.592.4741140.5843.46153.7247.4
1098.7642.39180.6946.17206.5447.47
Amini et al (2013)Asghari et al (2003)Consoli et al (2009)
Cc (%)C (kPa)φ (°)Cc (%)C (kPa)Cc (%)C (kPa)
0038.740000
158.1542.281.5200119.5
29443.133250484
4.53757146.5
10328

Physical characteristics of Chlef sand and cemented sand_

MaterialsCc (%)γS (g/cm3)D50 (mm)CUnif (.)CCurv (.)emin (.)emax (.)
Sand02.7190.442.351.320.5880.853
sand cemented2.52.7350.432.51.40.5420.831
52.7650.422.661.50.5350.811
7.52.810.412.751.450.5290.815
102.8450.42.851.50.5170.823

Parameters of the experimental program_

Type of SamplesVertical stress (kPa)Water content (%)Cement content (%)Relative density (%)Time of cure (days)Number of tests
Uncemented10008009
samples200
40010
Cemented samples1002.5807108
200514
400107.528
10
DOI: https://doi.org/10.2478/sgem-2019-0020 | Journal eISSN: 2083-831X | Journal ISSN: 0137-6365
Journal RSS Feed
Language: English
Page range: 200 - 211
Submitted on: Jan 22, 2019
Accepted on: Jul 6, 2019
Published on: Dec 30, 2019
Published by: Wroclaw University of Science and Technology
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year
Keywords:
Cemented reinforced sand,
direct shear test,
water content,
curing time,
dilatant character
Related subjects:
Geosciences,
Geosciences, other,
Materials sciences,
Composites,
Porous materials,
Physics,
Mechanics and fluid dynamics

© 2019 Kheira Boutouba, Ismail Benessalah, Ahmed Arab, Ahmed Djafar Henni, published by Wroclaw University of Science and Technology
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Previous articleVolume 41 (2019): Issue 4 (December 2019)Next article