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Lab Manuals for Soil Mechanics - SM By ANNA SUPERKINGS

  • Soil Mechanics - SM
  • Practical
  • Civil Engineering
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UCE – THIRUKKUVALAI www.vidyarthiplus.com B.E.CIVIL ENGINEERING CE 6511 SOIL MECHANICS LABORATORY (REGULATION-2013) SYLLABUS LIST OF EXPERIMENTS 1. DETERMINATION OF INDEX PROPERTIES: a. Specific gravity of soil solids. b. Grain size distribution – Sieve analysis. c. Grain size distribution Hydrometer analysis. d. Liquid limit and Plastic limit tests. e. Shrinkage limit and Differential free swell tests. 2. DETERMINATION OF INSITU DENSITY AND COMPACTION CHARACTERISTICS: a. Field density Test. (Sand Replacement Method) b. Determination of moisture – density relationship using standard Proctor compaction test. 3. DETERMINATION OF ENGINEERING PROPERTIES: a. Permeability determination. (Constant head and Falling head methods) b. One dimensional Consolidation test. (Determination of co-efficient of consolidation only) c. Direct Shear test in cohesion-less soil. d. Unconfined compression test in cohesive soil. e. Laboratory Vane Shear test in cohesive soil. f. Tri-axial Compression test in cohesion-less soil. (Demonstration only) g. California Bearing Ratio Test. Anna University Practical Question paper Specimen* 3

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UCE – THIRUKKUVALAI www.vidyarthiplus.com B.E.CIVIL ENGINEERING DETERMINATION OF SPECIFIC GRAVITY OF SOIL SOLIDS Ex.No.: Date: Aim: To determine the specific gravity of given soil solids. Apparatus Required: 4.75 mm IS sieve Pycnometer Distilled Water Weighing Balance Microwave Oven Instrument Setup: Fig.1. (a). IS Sieve (b). Pycnometer Procedure: Dry the pycnometer and weigh it with its cap. (W1) Take about 200gmof oven dried soil passing through 4.75mm sieve into the pycnometer and weigh again (W2). Add sufficient de-aired water to cover the soil and screw on the cap. Shake the pycnometer well and remove entrapped air if any. After the air has been removed, fill the pycnometer with water completely. Thoroughly dry the pycnometer from out side and weigh it (W3). Clean the pycnometer by washing thoroughly. Fill the cleaned pycnometer completely with water up to its top with cap screw on. Weigh the pycnometer after drying it on the outside thoroughly (W4). Repeat the procedure for three samples and obtain the average value of specific gravity. Formula: The specific gravity of given soil sample (G) = ( (𝑊2 −𝑊1 ) 𝑊4 −𝑊1 )−(𝑊3 −𝑊2 ) 5

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UCE – THIRUKKUVALAI Where, www.vidyarthiplus.com W1 - Weight of Empty Pycnometer W2 - Weight of Pycnometer + Dry soil solid W3 - Weight of Pycnometer + Dry soil solid+Water W4 - Weight of Pycnometer + Water B.E.CIVIL ENGINEERING Observation & Tabulation: Sl.no Sample Wt.(W1) gm Wt.(W2) gm Wt.(W3) gm Wt.(W4) gm Specific Gravity (G) Remarks Average (G) Calculation: The specific gravity of given soil sample (G) = ( (𝑊2 −𝑊1 ) 𝑊4 −𝑊1 )−(𝑊3 −𝑊2 ) Result: The specific gravity of given soil solid sample (G) is _______________ Limitations: The limitation of specific gravity of soil solid is (G) 2.50 – 2.65 at 27ºC Viva – Voce: 1. 2. 3. 4. 5. Define: Specific Gravity. What is the limitations of Specific gravity of soil? What are the use of this Experiment? Enlist the methods of water content in soil sample. Difference between specific gravity and bulk specific gravity. 6

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