â āϏā§ā§āϞ āĻā§āϏā§āĻ āϞā§āϝāĻžāĻŦ āĻāĻŋ? (What is a Soil Test Laboratory?)
āϏā§ā§āϞ āĻā§āϏā§āĻ āϞā§āϝāĻžāĻŦ āĻšāϞ⧠āĻāĻŽāύ āĻāĻāĻāĻŋ āĻŦāĻŋāĻļā§āώāĻžā§āĻŋāϤ āĻĒāϰā§āĻā§āώāĻžāĻāĻžāϰ āϝā§āĻāĻžāύ⧠āĻŦāĻŋāĻāĻŋāύā§āύ āϧāϰāύā§āϰ āĻŽāĻžāĻāĻŋāϰ āĻā§āϤ (Physical), āϰāĻžāϏāĻžā§āύāĻŋāĻ (Chemical) āĻāĻŦāĻ āĻĒā§āϰāĻā§āĻļāϞāĻāϤ (Geotechnical) āĻŦā§āĻļāĻŋāώā§āĻā§āϝ āĻĒāϰā§āĻā§āώāĻž āĻāϰāĻž āĻšā§āĨ¤
āύāĻŋāϰā§āĻŽāĻžāĻŖ āĻāĻžāĻ, āϏā§āϤā§, āϰāĻžāϏā§āϤāĻž, āĻāĻŦāύ, āĻāĻžāϞāĻāĻžāϰā§āĻ, āĻŦāĻžāĻāϧ, āĻĄā§āϰā§āύā§āĻ āϏāĻŋāϏā§āĻā§āĻŽ āĻāĻŦāĻ āĻā§āώāĻŋ āĻāĻŽāĻŋāϤ⧠āϏāĻ āĻŋāĻ āϏāĻŋāĻĻā§āϧāĻžāύā§āϤ āύā§āĻā§āĻžāϰ āĻāĻā§ āĻŽāĻžāĻāĻŋāϰ āĻļāĻā§āϤāĻŋ, āϧāĻžāϰāĻŖāĻā§āώāĻŽāϤāĻž āĻ āĻāĻ āύ āĻāĻžāύāĻžāϰ āĻ āϤā§āϝāύā§āϤ āĻĒā§āϰā§ā§āĻāύāĨ¤ āĻāĻ āϏāĻŦ āĻĒāϰā§āĻā§āώāĻžāĻ āĻāϰāĻž āĻšā§ āĻāĻāĻāĻŋ āϏā§ā§āϞ āĻā§āϏā§āĻ āϞā§āϝāĻžāĻŦāϰā§āĻāϰāĻŋāϤā§āĨ¤
đ āϏā§ā§āϞ āĻā§āϏā§āĻ āϞā§āϝāĻžāĻŦ āĻā§āύ āĻĒā§āϰā§ā§āĻāύ?
āĻāĻāĻāĻŋ āϏā§ā§āϞ āĻā§āϏā§āĻ āϞā§āϝāĻžāĻŦā§āϰ āĻĒā§āϰāϧāĻžāύ āĻāĻĻā§āĻĻā§āĻļā§āϝ āĻšāϞā§â
āĻŽāĻžāĻāĻŋ āĻŦāĻŋāĻāĻŋāύā§āύ āĻ
āĻŦāϏā§āĻĨāĻžā§ āĻā§āĻŽāύ āĻāĻāϰāĻŖ āĻāϰāĻŦā§ āϤāĻž āĻĒā§āϰā§āĻŦā§āĻ āĻāĻžāύāĻž āĻāĻŦāĻ āϏā§āĻ āĻ
āύā§āϝāĻžā§ā§ āϏāĻ āĻŋāĻ āĻĄāĻŋāĻāĻžāĻāύ āĻ āύāĻŋāϰā§āĻŽāĻžāĻŖ āĻāĻžāĻ āϏāĻŽā§āĻĒāύā§āύ āĻāϰāĻžāĨ¤
āϏā§ā§āϞ āĻā§āϏā§āĻ āϞā§āϝāĻžāĻŦ āĻĒā§āϰā§ā§āĻāύ āĻšā§ āĻāĻžāϰāĻŖāĻ
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āĻŽāĻžāĻāĻŋāϰ āĻŦāĻšāύāĻā§āώāĻŽāϤāĻž (Bearing Capacity) āĻāĻžāύāĻž
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āĻŽāĻžāĻāĻŋāϰ āĻāύāϤā§āĻŦ āĻ āĻāϰā§āĻĻā§āϰāϤāĻž (Density & Moisture) āĻŽāĻžāĻĒāĻž
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āĻŽāĻžāĻāĻŋāϰ Shear Strength āύāĻŋāϰā§āĻŖā§
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āϰāĻžāϏā§āϤāĻž āĻŦāĻž āϏāĻžāĻŦāĻā§āϰā§āĻĄā§āϰ CBR āĻŽāĻžāύ āĻāĻžāύāĻž
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āĻāĻŦāύ āĻ āϏā§āϤā§āϰ Foundation Design āϏāĻ āĻŋāĻāĻāĻžāĻŦā§ āύāĻŋāϰā§āϧāĻžāϰāĻŖ
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āĻ āĻŦāĻāĻžāĻ āĻžāĻŽā§āϰ āύāĻŋāϰāĻžāĻĒāϤā§āϤāĻž āύāĻŋāĻļā§āĻāĻŋāϤ āĻāϰāĻž
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āĻĻā§āϰā§āĻāĻŽā§ā§āĻžāĻĻā§ āϏā§āĻĨāĻžā§āĻŋāϤā§āĻŦ āύāĻŋāĻļā§āĻāĻŋāϤ āĻāϰāĻž
đ§Ē āϏā§ā§āϞ āĻā§āϏā§āĻ āϞā§āϝāĻžāĻŦā§ āĻā§ āĻā§ āĻĒāϰā§āĻā§āώāĻž āĻāϰāĻž āĻšā§?
āϏāĻžāϧāĻžāϰāĻŖāϤ āύāĻŋāĻŽā§āύā§āĻā§āϤ āĻĒāϰā§āĻā§āώāĻž āĻāϰāĻž āĻšā§āĻ
â Moisture Content Test
â Grain Size Analysis (Sieve / Hydrometer)
â Atterberg Limits (Liquid, Plastic & Shrinkage Limits)
â Compaction Test (Proctor Test)
â CBR Test (California Bearing Ratio)
â Direct Shear Test
â Unconfined Compression Test (UCC)
â Vane Shear Test
â Permeability Test
â Consolidation Test
â Triaxial Shear Test
â Soil Chemical Analysis (pH, EC, Nutrients â Optional)
đ āϏā§ā§āϞ āĻā§āϏā§āĻ āϞā§āϝāĻžāĻŦ āĻāĻžāϰāĻž āĻŦā§āϝāĻŦāĻšāĻžāϰ āĻāϰā§?
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āϏāĻŋāĻāĻŋāϞ āĻāĻā§āĻāĻŋāύāĻŋā§āĻžāϰ
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āĻāύāϏā§āĻā§āϰāĻžāĻāĻļāύ āĻā§āĻŽā§āĻĒāĻžāύāĻŋ
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āϰā§āĻĄ āĻ āĻšāĻžāĻāĻā§ā§ āĻŦāĻŋāĻāĻžāĻ
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āϏā§āĻĨāĻĒāϤāĻŋ āĻ āĻĒāϰāĻžāĻŽāϰā§āĻļāĻĻāĻžāϤāĻž āĻĒā§āϰāϤāĻŋāώā§āĻ āĻžāύ
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āĻāĻŋāĻ-āĻā§āĻāύāĻŋāĻā§āϝāĻžāϞ āĻāĻā§āĻāĻŋāύāĻŋā§āĻžāϰ
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āĻāĻŦā§āώāĻŖāĻž āĻĒā§āϰāϤāĻŋāώā§āĻ āĻžāύ
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āĻā§āώāĻŋ āĻ āĻĒāϰāĻŋāĻŦā§āĻļ āĻŦāĻŋāĻāĻžāĻ
đ āĻāĻāĻāĻŋ āϏā§ā§āϞ āĻā§āϏā§āĻ āϞā§āϝāĻžāĻŦā§ āϏāĻžāϧāĻžāϰāĻŖāϤ āϝāĻž āϝāĻž āĻĨāĻžāĻā§āĻ
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Sieve Shaker
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Atterberg Limit Set
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Proctor Compaction Set
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CBR Machine
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Direct Shear Machine
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Oven, Balance, Glassware
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Permeability Test Equipment
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Consolidation / Triaxial Equipment (Advanced Lab)
āĻāĻžāĻāϞ⧠āĻāĻŽāĻŋ āϏāĻŽā§āĻĒā§āϰā§āĻŖ Standard, Intermediate & Advanced Soil Lab Setup listāĻ āϏāĻžāĻāĻŋā§ā§ āĻĻāĻŋāϤ⧠āĻĒāĻžāϰāĻŋāĨ¤
đ¯ āϏāĻāĻā§āώā§āĻĒā§ (In Summary)
āĻāĻāĻāĻŋ āϏā§ā§āϞ āĻā§āϏā§āĻ āϞā§āϝāĻžāĻŦ āĻšāϞ⧠āĻāĻŽāύ āĻāĻāĻāĻŋ āϞā§āϝāĻžāĻŦāϰā§āĻāϰāĻŋ āϝā§āĻāĻžāύ⧠āĻŽāĻžāĻāĻŋāϰ āĻĒā§āϰāĻā§āĻļāϞāĻāϤ āĻā§āĻŖāĻāϤ āĻŽāĻžāύ āĻĒāϰā§āĻā§āώāĻž āĻāϰāĻž āĻšā§, āϝāĻžāϤ⧠āύāĻŋāϰā§āĻŽāĻžāĻŖ āĻāĻžāĻ āύāĻŋāϰāĻžāĻĒāĻĻ, āύāĻŋāϰā§āĻā§āϞ āĻ āĻĻā§āϰā§āĻāϏā§āĻĨāĻžā§ā§ āĻšā§āĨ¤
āĻŦāĻžāĻāϞāĻžāĻĻā§āĻļā§ āύāĻŋāϰā§āĻŽāĻžāĻŖ āĻāĻžāĻā§ Soil Test āĻ āĻĒāϰāĻŋāĻšāĻžāϰā§āϝ â āĻāĻŦāĻ RTC Dhaka āĻāĻĒāύāĻžāϰ āĻāύā§āϝ āϏāϰāĻŦāϰāĻžāĻš āĻāϰ⧠āϏāĻāϞ āϏā§ā§āϞ āĻā§āϏā§āĻ āϝāύā§āϤā§āϰāĻĒāĻžāϤāĻŋ, āĻāύāϏā§āĻāϞā§āĻļāύ āĻ āϏāĻžāĻĒā§āϰā§āĻ āϏāĻžāϰā§āĻāĻŋāϏāĨ¤
â āĻāĻāĻāĻŋ āϏā§ā§āϞ āĻā§āϏā§āĻ āϞā§āϝāĻžāĻŦ āϏā§āĻĨāĻžāĻĒāύā§āϰ āĻāύā§āϝ āĻĒā§āϰā§ā§āĻāύā§ā§ āϝāύā§āϤā§āϰāĻĒāĻžāϤāĻŋāϰ āϏāĻŽā§āĻĒā§āϰā§āĻŖ āϤāĻžāϞāĻŋāĻāĻž
(Soil Test Laboratory Equipment List â RTC Dhaka)
āĻŽāĻžāĻāĻŋ āĻāĻāĻāĻŋ āύāĻŋāϰā§āĻŽāĻžāĻŖ āĻĒā§āϰāĻāϞā§āĻĒā§āϰ āϏāĻŦāĻā§ā§ā§ āĻā§āϰā§āϤā§āĻŦāĻĒā§āϰā§āĻŖ āĻāĻĒāĻžāĻĻāĻžāύāĨ¤ āĻāĻŦāύ, āϏā§āϤā§, āϰāĻžāϏā§āϤāĻž, āĻāĻžāϞāĻāĻžāϰā§āĻ āĻŦāĻž āϝā§āĻā§āύ⧠āĻāύāϏā§āĻā§āϰāĻžāĻāĻļāύ āĻāĻžāĻā§āϰ āĻāĻā§ āĻŽāĻžāĻāĻŋāϰ āĻā§āĻŖāĻāϤ āĻŽāĻžāύ āĻāĻžāύāĻž āĻ
āϤā§āϝāύā§āϤ āĻāϰā§āϰāĻŋāĨ¤
āĻāĻ āĻāĻžāϰāĻŖā§ āĻāĻāĻāĻŋ āϏā§ā§āϞ āĻā§āϏā§āĻ āϞā§āϝāĻžāĻŦ (Soil Testing Laboratory) āύāĻŋāϰā§āĻŽāĻžāĻŖā§āϰ āĻāĻā§ āĻĒā§āϰā§ā§āĻāύ āĻšā§ āĻāĻŋāĻā§ āύāĻŋāϰā§āĻĻāĻŋāώā§āĻ āϝāύā§āϤā§āϰāĻĒāĻžāϤāĻŋāĨ¤
āύāĻŋāĻā§ āĻāĻŽāϰāĻž āĻāĻāĻāĻŋ āĻĒā§āϰā§āĻŖāĻžāĻā§āĻ āϤāĻžāϞāĻŋāĻāĻž āϤā§āϞ⧠āϧāϰāϞāĻžāĻŽâāϝāĻž āĻĻāĻŋā§ā§ āĻāĻĒāύāĻŋ āϏāĻšāĻā§āĻ āĻāĻāĻāĻŋ āϏā§āĻā§āϝāĻžāύā§āĻĄāĻžāϰā§āĻĄ āϏā§ā§āϞ āĻā§āϏā§āĻ āϞā§āϝāĻžāĻŦ āϏā§āĻāĻāĻĒ āĻāϰāϤ⧠āĻĒāĻžāϰāĻŦā§āύāĨ¤
đ° ā§§. āĻŦā§āϏāĻŋāĻ āϏā§ā§āϞ āĻā§āϏā§āĻ āϝāύā§āϤā§āϰāĻĒāĻžāϤāĻŋ (Basic Soil Testing Equipment)
āĻāĻā§āϞ⧠āĻĻāĻŋā§ā§ āϏāĻžāϧāĻžāϰāĻŖ āĻŽāĻžāĻāĻŋāϰ āĻļā§āϰā§āĻŖā§āĻŦāĻŋāύā§āϝāĻžāϏ (Soil Classification) āĻ Moisture Content āύāĻŋāϰā§āĻŖā§ āĻāϰāĻž āĻšā§āĨ¤
â 1. Digital / Manual Weighing Balance (0.01g āĻ 1g Sensitivity)
āĻŽāĻžāĻāĻŋāϰ āύāĻŽā§āύāĻžāϰ āϏāĻ āĻŋāĻ āĻāĻāύ āύāĻŋāϰā§āϧāĻžāϰāĻŖā§ āĻĒā§āϰā§ā§āĻāύāĨ¤
â 2. Hot Air Drying Oven
Soil Moisture Content Test āĻāĻŦāĻ Sample Preparation āĻāϰ āĻāύā§āϝāĨ¤
â 3. Soil Sample Containers / Moisture Tins
āĻŽāĻžāĻāĻŋ āϏāĻāĻā§āϰāĻš āĻ āĻāĻāύā§āϰ āĻāĻžāĻā§ āĻŦā§āϝāĻŦāĻšā§āϤāĨ¤
â 4. Soil Sample Collection Tools
Shovel, Pickaxe, Hand Auger, Sample Bags āĻāϤā§āϝāĻžāĻĻāĻŋāĨ¤
đ° ⧍. āĻā§āϰā§āĻāύ āϏāĻžāĻāĻ (Particle Size) āĻŦāĻŋāĻļā§āϞā§āώāĻŖā§āϰ āϝāύā§āϤā§āϰāĻĒāĻžāϤāĻŋ
āĻŽāĻžāĻāĻŋāϰ āĻāĻŖāĻžāϰ āĻāĻāĻžāϰ āĻ āĻŦāĻŖā§āĻāύ (Coarse to Fine) āĻāĻžāύāĻžāϰ āĻāύā§āϝāĨ¤
â 5. Sieve Shaker Machine
āĻŦāĻŋāĻāĻŋāύā§āύ āϏāĻžāĻāĻā§āϰ āĻāĻžāĻāĻāύāĻŋ āĻŦā§āϝāĻŦāĻšāĻžāϰ āĻāϰ⧠Soil Gradation Test āĻāϰāĻž āĻšā§āĨ¤
â 6. Sieve Set (4.75mm â 75 Micron āĻĒāϰā§āϝāύā§āϤ)
Coarse, sand āĻāĻŦāĻ fine soil analysis-āĻāϰ āĻāύā§āϝāĨ¤
â 7. Hydrometer Analysis Set
Clay āĻ silt fraction āύāĻŋāϰā§āĻŖā§ā§āϰ āĻāύā§āϝ (fine soil test)āĨ¤
đ° ā§Š. Soil Atterberg Limit Test Equipment
(Plasticity & Consistency Test)
â 8. Liquid Limit Device (Digital/Manual Casagrande)
â 9. Plastic Limit Test Set
â 10. Shrinkage Limit Set
āĻāĻ āϤāĻŋāύāĻāĻŋ āĻŽāĻŋāϞ⧠Atterberg Limits Test āϏāĻŽā§āĻĒā§āϰā§āĻŖ āĻšā§āĨ¤
đ° ā§Ē. Soil Compaction Test Equipment
(Proctor / Modified Proctor Test)
â 11. Standard Proctor Compaction Mould & Rammer
â 12. Modified Proctor Compaction Set
â 13. Automatic Soil Compactor (Optional āĻāĻŋāύā§āϤ⧠āĻāϧā§āύāĻŋāĻ āϞā§āϝāĻžāĻŦā§āϰ āĻāύā§āϝ āĻā§āϰā§āϤā§āĻŦāĻĒā§āϰā§āĻŖ)
āĻāĻā§āϞā§āϰ āĻŽāĻžāϧā§āϝāĻŽā§ OMC â Optimum Moisture Content āĻāĻŦāĻ Maximum Dry Density (MDD) āύāĻŋāϰā§āĻŖā§ āĻāϰāĻž āĻšā§āĨ¤
đ° ā§Ģ. Soil Strength Test Equipment
â 14. CBR (California Bearing Ratio) Test Machine
Road construction & Subgrade strength āĻĒāϰā§āĻā§āώāĻžāϰ āĻāύā§āϝ āĻ āϤā§āϝāĻžāĻŦāĻļā§āϝāĻāĨ¤
â 15. Direct Shear Apparatus (Digital/Manual)
āĻŽāĻžāĻāĻŋāϰ Shear Strength āύāĻŋāϰā§āĻŖā§āĨ¤
â 16. Unconfined Compression Machine (UCC Test)
Cohesive soil strength āĻĒāϰā§āĻā§āώāĻžāϰ āĻāύā§āϝāĨ¤
â 17. Vane Shear Apparatus
Soft clay soil strength āĻĒāϰā§āĻā§āώāĻžāϰ āĻāύā§āϝāĨ¤
đ° ā§Ŧ. Soil Permeability Test Equipment
â 18. Constant Head Permeability Apparatus
(coarse soil āĻāϰ āĻāύā§āϝ)
â 19. Falling Head Permeability Apparatus
(fine soil āĻāϰ āĻāύā§āϝ)
āĻāĻā§āϞ⧠āĻĻāĻŋā§ā§ āĻŽāĻžāĻāĻŋāϰ āĻĒāĻžāύāĻŋ āĻĒā§āϰāĻŦāĻžāĻš āĻā§āώāĻŽāϤāĻž (permeability) āύāĻŋāϰā§āϧāĻžāϰāĻŖ āĻāϰāĻž āĻšā§āĨ¤
đ° ā§. Advanced Geotechnical Testing Equipment
(āĻŦā§ āϞā§āϝāĻžāĻŦ āĻŦāĻž Consultancy Firm-āĻāϰ āĻāύā§āϝ)
â 20. Triaxial Shear Test Apparatus
Three-dimensional soil stress analysis āĻāϰāĻžāϰ āϏāĻŦāĻā§ā§ā§ advanced systemāĨ¤
â 21. Consolidation (Oedometer) Test Machine
Settlement behavior āĻāĻŦāĻ compressibility āĻā§āĻ āĻāϰāϤ⧠āĻŦā§āϝāĻŦāĻšā§āϤāĨ¤
đ§° ā§Ž. Miscellaneous Soil Laboratory Items
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Glass Beaker & Measuring Cylinder
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Spatula, Trowel
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Drying trays
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Stop watch
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Thermometer
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Desiccator
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Soil Sample Storage Rack
đ¯ āϏāĻžāϰāϏāĻāĻā§āώā§āĻĒ
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