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Unformatted text preview: CE 3502 CONSTRUCTION MATERIALS POLYTECH O r l a n d o Professor: José Costa Materials for Civil & Highway Engineers – 4 th Edition Chapter 1 – SOIL (Part II) Chapter I  Soil 1. Introduction 2. Origin and Geologic Properties 3. Soil Composition and Properties 1. SoilParticle Size 2. WeightVolume Relationships . elative Density CE 3502 Construction Materials 2 3. Relative Density 4. Mechanical Analysis of Soils 5. ParticleSize Distribution Curve 6. Consistency of Soil 4. Soil Classification 5. SoilWater Interaction 6. Soil Compressibility 7. Soil Strength 8. Soil Improvement 9. Reference Spring 2010 Professor: José Costa 1  3.3 Relative Density CE 3502 Construction Materials Chapter 1  Soil h Special weightvolume relationship used in sands and gravels. h Indicate the insitu denseness or looseness of granular soil. h No applicable for finegrained soils. h Express in terms of void ratio or dry unit weight: 3 Spring 2010 Professor: José Costa (at a void ratio of e min ) (at a void ratio of e max ) (worse condition – loosest state) (best condition – densest state) 1 3.5 ParticleSize Distribution Curve CE 3502 Construction Materials Chapter 1  Soil Example  3.1 A sand has a maximum dry unit weight of 17.29 KN/m 3 and minimum dry unit weight of 15.41 KN/m 3 . Given a Specific Gravity of G = 2.66 and a dry unit weight in the field of 16.51 KN/m 3 , determine the relative density in the field: 4 Spring 2010 Professor: José Costa 13.4 Mechanical Analysis of Soil x Mechanical Analysis is the determination of the size range of particles present in a soil is expressed as a percentage of the total dry weight. x There are two laboratory methods used to determine the grainsize distribution of soils: CE 3502 Construction Materials 5 1. Sieve Analysis 2. Hydrometer Analysis Fall 2009 Professor: José Costa Sieve Analysis x Test method used for CoarseGrained Soil (sands and gravels) x This method is valid for Soils with particles sizes larger than 0.075 mm in CE 3502 Construction Materials ASTM D 422 Standard Test Method for ParticleSize Analysis of Soils 6 diameter. x Consist of shaking the soil sample through a set of sieves that has progressively smaller openings. x The weight of the soil retained in each sieve is measured, and the percentage of soil passing through each sieve is computed based on the total dry weight of the sample. Spring 2010 Professor: José Costa Table 3.1  U.S. Standard Sieve Sizes CE 3502 Construction Materials Sieve Size Sieve Opening (mm) 4 in. 100 3 in. 75 2 in. 50 1½ in. 37.5 1 in. 25 ¾ in. 19 1/2 in. 12.5 3/8 in. 9.5 3” ¾” Coarse Gravel Fine Gravel 7 Spring 2010 Professor: José Costa No. 4 4.75 No. 8 2.36 No. 10 2.00 No. 16 1.18 No. 20 0.850 No. 30 0.600 No. 40 0.425 No. 50 0.300 No. 60 0.250 No. 70 0.212 No. 100 0.150 No. 140 0.106 No. 200 0.075 Coarse Sand Medium Sand Fine Sand Fines (Silt & Clay) Hydrometer Analysis x Test method used for FinedGrained Soils (finer sands, silt and clays) x...
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This note was uploaded on 07/20/2011 for the course CIVIL ENGI 3502 taught by Professor Josecosta during the Spring '11 term at InterAmerican Recinto Metropolitano.
 Spring '11
 JoseCosta

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