Sample Lab Report

BS 1377-2: 1990

SoilLab

Test By

SoilLab Demo

Job Ref.

SL-DEMO-001

Project

Demo Lab Project — Lekki Bridge Approach

Client

SoilLab Demonstration

Date

2026-08-09

Borehole

BH-01

Sample

D1

Depth (m)

1 – 1.45

Atterberg Limits

LL method

Liquid Limit — Cone penetrometer

#	Container ID	Wet+cont. (g)	Dry+cont. (g)	Container (g)	Cone pen. (mm)	MC (%)
1						39.0
2						42.0
3						45.0
4						48.0

Flow curve

Plastic Limit

#	Container ID	Wet+cont. (g)	Dry+cont. (g)	Container (g)	MC (%)
1					21.5
2					22.5

Liquid Limit, LL (%)

43.8

Plastic Limit, PL (%)

22.0

Plasticity Index, PI (%)

21.8

Remarks

Status: FINALSheet 1 of 13 · Generated by SoilLab

BS 1377-2: 1990

SoilLab

Test By

SoilLab Demo

Job Ref.

SL-DEMO-001

Project

Demo Lab Project — Lekki Bridge Approach

Client

SoilLab Demonstration

Date

2026-08-09

Borehole

BH-01

Sample

D1

Depth (m)

1 – 1.45

Cone Penetrometer (LL)

LL method

Liquid Limit — Casagrande apparatus

#	Container ID	Wet+cont. (g)	Dry+cont. (g)	Container (g)	Blows (N)	MC (%)
1						41.0
2						44.0
3						47.0
4						50.0

Flow curve

Plastic Limit

#	Container ID	Wet+cont. (g)	Dry+cont. (g)	Container (g)	MC (%)
1					22.0
2					23.0

Liquid Limit, LL (%)

45.3

Plastic Limit, PL (%)

22.5

Plasticity Index, PI (%)

22.8

Remarks

Status: FINALSheet 2 of 13 · Generated by SoilLab

BS 1377-2: 1990

SoilLab

Test By

SoilLab Demo

Job Ref.

SL-DEMO-001

Project

Demo Lab Project — Lekki Bridge Approach

Client

SoilLab Demonstration

Date

2026-08-09

Borehole

BH-01

Sample

D2

Depth (m)

2 – 2.45

Specific Gravity

Temp (°C)

Specific gravity — small pyknometer (BS 1377-2:1990 cl. 8.3)

Trial	m₁ jar (g)	m₂ jar+soil (g)	m₃ jar+soil+water (g)	m₄ jar+water (g)	Gs
					2.649
					2.66

Result

Mean Gs

2.655

Valid trials

2

Test temperature

22 °C

Gs = (m₂ − m₁) / [(m₄ − m₁) − (m₃ − m₂)]. Trials should agree within 0.03.

Remarks

Status: FINALSheet 3 of 13 · Generated by SoilLab

BS 1377-2: 1990

SoilLab

Test By

SoilLab Demo

Job Ref.

SL-DEMO-001

Project

Demo Lab Project — Lekki Bridge Approach

Client

SoilLab Demonstration

Date

2026-08-09

Borehole

BH-01

Sample

D3

Depth (m)

3 – 3.45

Sieve Analysis

Total dry mass (g)

Sieve analysis (BS 1377-2)

Sieve (mm)	Cum. retained (g)	% retained	% passing
	0	0	100
	0	0	100
	0	0	100
	0	0	100
	0	0	100
	0	0	100
	5	1	99
	20	3	96
	40	4	92
	50	2	90
	75	5	85
	105	6	79
	150	9	70
	210	12	58
	250	8	50
	295	9	41
	345	10	31
	385	8	23
	445	12	11
Pan	500	11	0

Summary

Sum retained (g)

500

% loss

0%

Total submitted (g)

500

Remarks

Status: FINALSheet 4 of 13 · Generated by SoilLab

BS 1377-2: 1990

SoilLab

Test By

SoilLab Demo

Job Ref.

SL-DEMO-001

Project

Demo Lab Project — Lekki Bridge Approach

Client

SoilLab Demonstration

Date

2026-08-09

Borehole

BH-01

Sample

D3

Depth (m)

3 – 3.45

Hydrometer Calibration

Hydrometer calibration & sample data

Specific gravity GsDry mass per litre m (g)Meniscus correction CmDispersing-agent corr. CdCalibration a (cm)Calibration b

Effective depth H_R (cm) = a − b·(R_h + Cm). Defaults shown are typical for a BS 152H hydrometer.

Remarks

Status: FINALSheet 5 of 13 · Generated by SoilLab

BS 1377-2: 1990

SoilLab

Test By

SoilLab Demo

Job Ref.

SL-DEMO-001

Project

Demo Lab Project — Lekki Bridge Approach

Client

SoilLab Demonstration

Date

2026-08-09

Borehole

BH-01

Sample

D3

Depth (m)

3 – 3.45

Hydrometer Test

Hydrometer calibration & sample data

Specific gravity GsDry mass per litre m (g)Meniscus correction CmDispersing-agent corr. CdCalibration a (cm)Calibration b

Effective depth H_R (cm) = a − b·(R_h + Cm). Defaults shown are typical for a BS 152H hydrometer.

Hydrometer readings (BS 1377-2)

R' = R_h + Cm − Cd	H_R (cm)	D (mm)	% finer
34.5	9.99	0.0595	100
32.5	10.31	0.0427	100
29.5	10.81	0.0309	94.8
26.5	11.3	0.0224	85.1
23.5	11.79	0.0161	75.5
20.5	12.28	0.012	65.8
17.5	12.77	0.0087	56.2
14.5	13.27	0.0063	46.6
11.5	13.76	0.0045	36.9
8.5	14.25	0.0032	27.3
4.5	14.91	0.0014	14.5

Remarks

Status: FINALSheet 6 of 13 · Generated by SoilLab

BS 1377-2: 1990

SoilLab

Test By

SoilLab Demo

Job Ref.

SL-DEMO-001

Project

Demo Lab Project — Lekki Bridge Approach

Client

SoilLab Demonstration

Date

2026-08-09

Borehole

BH-01

Sample

D3

Depth (m)

3 – 3.45

Particle Size Distribution

Source tests

Sieve test

Hydrometer test

Particle-size distribution curve

Gradation summary

D10 (mm)

0.0272

D30 (mm)

0.203

D60 (mm)

0.6716

Cu

24.72

Cc

2.26

Fines (%)

11

Sand (%)

68

Gravel (%)

21

Remarks

Status: FINALSheet 7 of 13 · Generated by SoilLab

BS 1377-4: 1990

SoilLab

Test By

SoilLab Demo

Job Ref.

SL-DEMO-001

Project

Demo Lab Project — Lekki Bridge Approach

Client

SoilLab Demonstration

Date

2026-08-09

Borehole

TP-01

Sample

B1

Depth (m)

0.5 – 1.5

Compaction (Proctor)

MethodMould vol (cm³)Gs

Compaction points (BS 1377-4:1990)

Pt	w (%)	ρ (Mg/m³)	ρd (Mg/m³)
1	8	1.903	1.762
2	11	2.038	1.836
3	13	2.091	1.85
4	15	2.111	1.836
5	18	2.08	1.763

Compaction curve

Result

Optimum moisture content

13 %

Max dry density

1.85 Mg/m³

Method

2.5 kg rammer (standard)

Remarks

Status: FINALSheet 8 of 13 · Generated by SoilLab

BS 1377-4: 1990

SoilLab

Test By

SoilLab Demo

Job Ref.

SL-DEMO-001

Project

Demo Lab Project — Lekki Bridge Approach

Client

SoilLab Demonstration

Date

2026-08-09

Borehole

TP-01

Sample

B1

Depth (m)

0.5 – 1.5

CBR

ConditionSurcharge (kg)

Penetration / force (BS 1377-4:1990 cl. 7)

Penetration (mm)	Force (kN)

Load–penetration curve

Result

Force @ 2.5 mm

3.2 kN

Force @ 5.0 mm

5.3 kN

CBR @ 2.5 mm

24.2 %

CBR @ 5.0 mm

26.5 %

Reported CBR

26.5 %

Governing penetration

5.0 mm

CBR = applied force / standard force × 100, with standard forces of 13.2 kN at 2.5 mm and 20 kN at 5.0 mm.

Remarks

Status: FINALSheet 9 of 13 · Generated by SoilLab

BS 1377-6: 1990

SoilLab

Test By

SoilLab Demo

Job Ref.

SL-DEMO-001

Project

Demo Lab Project — Lekki Bridge Approach

Client

SoilLab Demonstration

Date

2026-08-09

Borehole

BH-02

Sample

U1

Depth (m)

4 – 4.75

Permeability

MethodL (mm)A (mm²)a standpipe (mm²)Temp (°C)

Permeability — falling head (BS 1377-6:1990)

Run	h₁ (mm)	h₂ (mm)	Time (s)	k (m/s)
				1.65e-6
				1.61e-6
				1.67e-6

Result

Mean k at test temp

1.64e-6 m/s

Viscosity ratio RT

0.953

k₂₀ (corrected)

1.57e-6 m/s

k = (a·L)/(A·t) · ln(h₁/h₂); corrected to 20 °C with RT = η_T / η₂₀.

Remarks

Status: FINALSheet 10 of 13 · Generated by SoilLab

BS 1377-7: 1990

SoilLab

Test By

SoilLab Demo

Job Ref.

SL-DEMO-001

Project

Demo Lab Project — Lekki Bridge Approach

Client

SoilLab Demonstration

Date

2026-08-09

Borehole

BH-02

Sample

U2

Depth (m)

5 – 5.75

Shear Box

Box (mm)Rate (mm/min)Drainage

Shear box stages (BS 1377-7:1990 cl. 4)

Stage	Normal stress σ′ (kPa)	Peak shear τ (kPa)	Residual τ (kPa)	Disp. (mm)
1
2
3

Failure envelope

Result

Peak c′

8.1 kPa

Peak φ′

30°

Residual c′r

0.1 kPa

Residual φ′r

27°

τ = c′ + σ′·tan φ′, fitted by least squares through the stage points.

Remarks

Status: FINALSheet 11 of 13 · Generated by SoilLab

BS 1377-7: 1990

SoilLab

Test By

SoilLab Demo

Job Ref.

SL-DEMO-001

Project

Demo Lab Project — Lekki Bridge Approach

Client

SoilLab Demonstration

Date

2026-08-09

Borehole

BH-02

Sample

U3

Depth (m)

6 – 6.75

Consolidation

H₀ (mm)e₀Double drainage

Oedometer stages (BS 1377-5/7:1990)

Void ratio e	mv (m²/MN)	cv (m²/yr)
0.889	—	4.12
0.879	0.201	3.39
0.86	0.202	2.95
0.826	0.184	2.56
0.781	0.122	2.22
0.731	0.071	1.92

e – log σ′ curve

Result

Compression index Cc

0.166

Swelling index Cs

—

Preconsolidation σ′p

130.9 kPa

e = e₀ − (ΔH/H₀)(1+e₀); mv = (ΔH/H)/Δσ′; cv = 0.197·H²dr/t₅₀ (Taylor/Casagrande t₅₀).

Remarks

Status: FINALSheet 12 of 13 · Generated by SoilLab

BS 1377-8: 1990

SoilLab

Test By

SoilLab Demo

Job Ref.

SL-DEMO-001

Project

Demo Lab Project — Lekki Bridge Approach

Client

SoilLab Demonstration

Date

2026-08-09

Borehole

BH-02

Sample

U4

Depth (m)

7 – 7.75

Triaxial

Test

Specimens at failure (BS 1377-7/8:1990)

Spec.	σ₃ (kPa)	Deviator (kPa)	u_f (kPa)	εf (%)	σ₁ (kPa)	σ₁′ / σ₃′
					320	275 / 55
					580	485 / 105
					845	695 / 150

Mohr–Coulomb

Result

c (total)

17.5 kPa

φ (total)

26.6°

c′

6.7 kPa

φ′

39.1°

Mean cu

190.8 kPa

Envelope fitted in s–t space: t = a + s·tanα with sin φ = tan α and c = a / cos φ. cu = deviator / 2 (UU).

Remarks

Status: FINALSheet 13 of 13 · Generated by SoilLab

Sieve (mm)	Cum. retained (g)	% retained	% passing
	0	0	100
	0	0	100
	0	0	100
	0	0	100
	0	0	100
	0	0	100
	5	1	99
	20	3	96
	40	4	92
	50	2	90
	75	5	85
	105	6	79
	150	9	70
	210	12	58
	250	8	50
	295	9	41
	345	10	31
	385	8	23
	445	12	11
Pan	500	11	0

Sieve (mm)	Cum. retained (g)	% retained	% passing
	0	0	100
	0	0	100
	0	0	100
	0	0	100
	0	0	100
	0	0	100
	5	1	99
	20	3	96
	40	4	92
	50	2	90
	75	5	85
	105	6	79
	150	9	70
	210	12	58
	250	8	50
	295	9	41
	345	10	31
	385	8	23
	445	12	11
Pan	500	11	0

Sample laboratory report

Specific gravity — small pyknometer (BS 1377-2:1990 cl. 8.3)

Result

Remarks

Sieve analysis (BS 1377-2)

Summary

Remarks

Hydrometer calibration & sample data

Remarks

Hydrometer calibration & sample data

Hydrometer readings (BS 1377-2)

Remarks

Source tests

Particle-size distribution curve

Gradation summary

Remarks

Compaction points (BS 1377-4:1990)

Compaction curve

Result

Remarks

Penetration / force (BS 1377-4:1990 cl. 7)

Load–penetration curve

Result

Remarks

Permeability — falling head (BS 1377-6:1990)

Result

Remarks

Shear box stages (BS 1377-7:1990 cl. 4)

Failure envelope

Result

Remarks

Oedometer stages (BS 1377-5/7:1990)

e – log σ′ curve

Result

Remarks

Specimens at failure (BS 1377-7/8:1990)

Mohr–Coulomb

Result

Remarks

Sieve (mm)	Cum. retained (g)	% retained	% passing
	0	0	100
	0	0	100
	0	0	100
	0	0	100
	0	0	100
	0	0	100
	5	1	99
	20	3	96
	40	4	92
	50	2	90
	75	5	85
	105	6	79
	150	9	70
	210	12	58
	250	8	50
	295	9	41
	345	10	31
	385	8	23
	445	12	11
Pan	500	11	0