Shear strength of compacted Chlef sand: effect of water content, fines content and others parameters

Djamel Bouri; Abdallah Krim; Abdelkader Brahim; Ahmed Arab

Otwarty dostęp

Shear strength of compacted Chlef sand: effect of water content, fines content and others parameters

oraz

| 19 mar 2020

Studia Geotechnica et Mechanica

Tom 42 (2020): Zeszyt 1 (April 2020)

O artykule

Poprzedni artykuł

Następny artykuł

Zacytuj

Udostępnij

Article Category: Research Article

Data publikacji: 19 mar 2020

Zakres stron: 18 - 35

Otrzymano: 24 gru 2018

Przyjęty: 27 sie 2019

DOI: https://doi.org/10.2478/sgem-2019-0027

Słowa kluczowe
fines content, water content, direct shear test, friction angle, cohesion

© 2020 Djamel Bouri et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Grain size distribution curves of tested materials: (a) Sand and silt, (b) Sand-silt mixtures.

Materials used in this study: (a) fines content, (b) clean sand, (c) samples prepared by dry deposition sand-silt mixtures.

Samples prepared by wet deposition: (a) clean sand, (b) sand-silt mixtures.

Effect of fines content on the mechanical behaviour of sand-silt mixtures (RD = 65%, σn = 100 kPa): (a) variation of the shear strength versus horizontal displacement, (b) variation of vertical displacement versus horizontal displacement.

Effect of fines content on the mechanical behaviour of sand-silt mixtures (RD = 65%, σn = 200 kPa): (a) variation of the shear strength versus horizontal displacement, (b) variation of vertical displacement versus horizontal displacement.

Effect of fines content on the mechanical behaviour of sand-silt mixtures (RD = 65%, σn = 400 kPa): (a) variation of the shear strength versus horizontal displacement, (b) variation of vertical displacement versus horizontal displacement.

Effect of fines content on the mechanical behaviour of sand-silt mixtures (RD = 80%, σn = 100 kPa): (a) variation of the shear strength versus horizontal displacement, (b) variation of vertical displacement versus horizontal displacement.

Effect of fines content on the mechanical behaviour of sand-silt mixtures (RD = 80%, σn = 200 kPa): (a) variation of the shear strength versus horizontal displacement, (b) variation of vertical displacement versus horizontal displacemen.

Effect of fines content on the mechanical behaviour of sand-silt mixtures (RD = 80%, σn = 400 kPa): (a) variation of the shear strength versus horizontal displacement, (b) variation of vertical displacement versus horizontal displacement.

Effect of fines content on the mechanical behaviour of sand: Maximum shear stress versus normal stress.

Effect the fines content on the mechanical characteristics of (clean) sand, (a) cohesion versus fines content, (b) friction angle versus fines content.

Effect of water content on the mechanical behaviour of clean sand (RD = 65%, σn = 200 kPa): (a) variation of the shear strength versus horizontal displacement, (b) variation of vertical displacement versus horizontal displacement.

Effect of water content on the mechanical behaviour of clean sand (RD = 80%, σn = 200 kPa): (a) variation of the shear strength versus horizontal displacement, (b) variation of vertical displacement versus horizontal displacement.

Effect of water content on the mechanical behaviour of clean sand: Maximum shear stress versus normal stress.

Effect of water content on the friction angle versus water content of clean sand.

Effect of water content on the mechanical behaviour of clean sand: (a) RD = 65%, (b) RD = 80%.

Effect of fines content on the mechanical behaviour of sand-silt mixtures (RD = 65%, σn = 400 kPa): (a) variation of vertical displacement versus horizontal displacement (w = 3%), (b) variation of vertical displacement versus horizontal displacement (w = 0%)

Effect of fines content on the mechanical behaviour of sand-silt mixtures (RD = 80%, σn = 400 kPa): (a) variation of vertical displacement versus horizontal displacement (w = 3%), (b) variation of vertical displacement versus horizontal displacement (w = 0%)

Effect of fines content on the mechanical behaviour of sand-silt mixtures: Maximum shear stress versus normal stress (w = 3%).

Effect of depositional method on the mechanical behaviour of clean sand: (a) RD = 65%, (b) RD = 80%.

Effect of the depositional method on the mechanical behaviour of clean sand: (a) variation of the shear strength versus horizontal displacement (RD = 65%), (b) variation of the shear strength versus horizontal displacement (RD = 80%).

Chemical analysis of tested materials [3].

Composition (%)	Chlef sand	Chlef silt
Fire loss	14.34	10.85
Total Silica (SiO₂)	55.89	48.95
Alumina (Al₂O₃)	5.58	34.08
Oxide of iron (Fe₂O₃)	7.58	1.43
Oxide of titane (TiO₂)	0.00	0.00
Lime (CaO)	15.42	0.20
Magnesia (MgO).	0.00	0.42
Potash (K₂O)	Traces	2.26
Oxide of sodium (Na₂O)	Traces	0.06
Sulfates SO₄	0.28	0.00
Chlorides CL-Solubles in water	0.14	0.00
Carbonates CaCO₃	24.60	0.00
Insolubles	0.53	0.00
Organic materials	0.00	0.00

Coefficients A, B and R2 for equation (3) (RD = 80%).

s_n (kPa)	Preparation method	A	B	R²
100	Air pluviation (AP)	−0.351	93.826	0.97
200		−1.325	213.47	0.98
400		−2.366	377.46	0.99
100	Moist tamping (MT)	−0.106	74.932	0.88
200		−0.214	160.2	0.98
400		−0.860	304.74	0.91

Coefficients A, B and R2 for equation (2).

s_n (kPa)	RD (%)	A	B	R²
100	65	−5.221	88.869	0.94
200		−12.52	183.33	0.90
400		−20.73	345.97	0.89
100	80	−6.83	94.153	0.98
200		−15.94	203.42	0.87
400		−25.48	370.26	0.90

Cohesion and friction angle for test result.

Material	w (%)	RD (%)	j (°)
Clean sand	0	65	41.67
	0	85	44.13
	1	65	38.66
	1	80	39.69
	2	65	36.50
	2	80	38.31
	3	65	36.13
	3	80	37.23

Cohesion and friction angle for tests result.

Material	Fc (%)	RD (%)	c (kPa)	j (°)
Clean sand	0	65	0	41.67
	0	85	0	44.13
	10	65	9.13	39.01
	10	80	15.33	40.36
Sand-silt mixtures	20	65	11.20	37.23
	20	80	15.88	38.66
	30	65	13.54	35.37
	30	80	17.17	35.75
	40	65	15.09	33.82
	40	80	18.86	34.05

Index properties of sand-silt mixtures.

Materials	F_c (%)	G_s	D₁₀ (mm)	D₅₀ (mm)	C_u	C_c	e_min	e_max
Clean sand	0	2.650	0.17	0.41	2.82	1.10	0.623	0.848
Clean sand	10	2.653	0.08	0.38	5.28	1.70	0.487	0.811
Sand-silt mixtures	20	2.656	0.04	0.33	9.80	1.92	0.455	0.776
	30	2.659	0.03	0.32	13.31	0.84	0.421	0.749
	40	2.662	0.02	0.25	15.17	0.01	0.489	0.803
Chlef silt	100	2.667	-	0.03	-	-	0.593	0.783

Coefficients A, B and R2 for equation (3) (RD = 65%).

s_n (kPa)	Preparation method	A	B	R²
100	Air pluviation (AP)	−0.274	88.4	0.93
200		−0.875	188.68	0.99
400		−1.823	350.92	0.99
100	Moist tamping (MT)	−0.179	73.794	0.92
200		−0.400	151.71	0.90
400		−1.024	292.67	0.99

eISSN:: 2083-831X
Język:: Angielski

Częstotliwość wydawania:: 4 razy w roku
Dziedziny czasopisma:: Geosciences, other, Materials Sciences, Composites, Porous Materials, Physics, Mechanics and Fluid Dynamics

Kanał RSS czasopisma

Shear strength of compacted Chlef sand: effect of water content, fines content and others parameters

Article Category: Research Article

Data publikacji: 19 mar 2020

Zakres stron: 18 - 35

Otrzymano: 24 gru 2018

Przyjęty: 27 sie 2019

DOI: https://doi.org/10.2478/sgem-2019-0027

Słowa kluczowe
fines content, water content, direct shear test, friction angle, cohesion

© 2020 Djamel Bouri et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Figure 16

Figure 17

Figure 18

Figure 19

Figure 20

Figure 21

Figure 22

Figure 23

Chemical analysis of tested materials [3].

Coefficients A, B and R2 for equation (3) (RD = 80%).

Coefficients A, B and R2 for equation (2).

Cohesion and friction angle for test result.

Cohesion and friction angle for tests result.

Index properties of sand-silt mixtures.

Coefficients A, B and R2 for equation (3) (RD = 65%).

Shear strength of compacted Chlef sand: effect of water content, fines content and others parameters

Article Category: Research Article

Data publikacji: 19 mar 2020

Zakres stron: 18 - 35

Otrzymano: 24 gru 2018

Przyjęty: 27 sie 2019

DOI: https://doi.org/10.2478/sgem-2019-0027

Słowa kluczowefines content, water content, direct shear test, friction angle, cohesion

© 2020 Djamel Bouri et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Figure 16

Figure 17

Figure 18

Figure 19

Figure 20

Figure 21

Figure 22

Figure 23

Chemical analysis of tested materials [3].

Coefficients A, B and R2 for equation (3) (RD = 80%).

Coefficients A, B and R2 for equation (2).

Cohesion and friction angle for test result.

Cohesion and friction angle for tests result.

Index properties of sand-silt mixtures.

Coefficients A, B and R2 for equation (3) (RD = 65%).

Słowa kluczowe
fines content, water content, direct shear test, friction angle, cohesion