Chemical Grouting And Soil Stabilization, Revised And by Reuben H. Karol PDF

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Extra resources for Chemical Grouting And Soil Stabilization, Revised And Expanded

Sample text

1990. Reproduced by permission of McGraw-Hill Companies. Copyright 2003 by Marcel Dekker, Inc. All Rights Reserved. 2B Soil Compaction Characteristics and Recommended Compaction Equipment General soil description Unified soil classification Compaction characteristics Sand and sand-gravel mixtures (no silts or clay) SW, SP, GW, GP Good Sand or sand-gravel with silt SM, GM Good Sand or sand-gravel with clay SC, GC Good to fair Silt ML Good to poor MH Fair to poor Clay CL Good to fair Organic soil CH OL, OH, PT Fair to poor Not recommended for structural earth fill Recommended compaction equipment Vibratory drum roller, vibratory rubber tire, pneumatic tire equipment.

2a. 9. 2b. Copyright 2003 by Marcel Dekker, Inc. All Rights Reserved. 2A Applicability of Compaction Equipment Equipment Smooth wheel rollers, static or vibrating Rubber-tired rollers Grid rollers Sheepsfoot rollers: Static Vibrating Vibrating plate (light) Tampers, rammers Impact rollers Most-suitable soils Well-graded sand-gravel mixtures, crushed rock, asphalt Coarse-grained soils with some fines Weathered rock, well-graded coarse soils Fine-grained soils with more than 20% fines As above, but also sand-gravel mixtures Coarse-grained soils, 4 to 8% fines All types Wide range of moist and saturated soils Typical applications Running surface, base courses, subgrades for roads and runways Road and airfield subgrade and base course proofrolling Subgrade, subbase Least-suitable soils Uniform sands Coarse uniform cohesionless soils, and rock Clays, silty clays, uniformly graded materials Dams, embankments, subgrades for airfields, highways Subgrade layers Clean coarse-grained soils, soils with cobbles, stones Small patches Cohesive soils Difficult-access areas Subgrade earthworks (except surface) Dry, cohesionless soils Hausmann, M.

5 PROBLEMS A glass graduate is filled to the 50 cc mark with water. A 100 gram sample of sand and silt is dropped into the graduate, raising the water level to 88 cc. What is the specific gravity of the soil? A partially saturated granular soil weighs 115 pcf in its wet condition, and has a 10% water content. Estimate the void ratio and porosity. How much would the soil weigh if it were fully saturated? What would be its submerged unit weight? A boring log defines a specific stratum of soil as ‘‘narrowly graded sand-silt mix with no clay’’.

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