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Lab Manuals for Soil Mechanics - SM By chintha reddy krishna reddy

  • Soil Mechanics - SM
  • Practical
  • TKR college of engineering - TKEM
  • Civil Engineering
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SOIL MECHANICS LABORATORY MANUAL Sixth Edition Braja M. Das Dean, College of Engineering and Computer Science California State University, Sacramento New York Oxford OXFORD UNIVERSITY PRESS 2002

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CONTENTS I. 2. 3. 4. 5. 6. 7. B. 9. 10. . II. 12. 13. 14. 15. 16. 17. lB. Laboratory Test and Report Preparation Determination of Water Content 5 Specific Gravity 9 Sieve Analysis 15 Hydrometer Analysis 23 Liquid Limit Test 35 Plastic Limit Test 41 Shrinkage Limit Test 45 Engineering Classification of Soils 51 Constant Head Permeability Test in Sand 69 Falling Head Permeability Test in Sand 75 Standard Proctor Compaction Test 81 Modified Proctor Compaction Test 89 Determination of Field Unit Weight of Compaction by Sand Cone Method 93 Direct Shear Test on Sand 99 Unconfined Compression Test 109 Consolidation Test I 17 Triaxial Tests in Clay 129 References 145 Appendices A. Weight-Volume Relationships· 147 B. Data Sheets for Laboratory Experiments 151 C. Data Sheets for Preparation of Laborat~ry Reports 215

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PREFACE Since the early 1940's the study of soil mechanics has made great progress all over the world. A course in soil mechanics is presently required for undergraduate students in most four- year civil engineering and civil engineering technology programs. It usually includes some laboratory procedures that are essential in understanding the properties of soils and their behavior under stress and strain; the present laboratory manual is prepared for classroom use by undergraduate students taking such a course. The procedures and equipment described in this manual are fairly common. For a few tests such as permeability, direct shear, and unconfined compression, the existing equipment in a given laboratory may differ slightly. In those cases, it is necessary that the instructor familiarize students with the operation of the equipment. Triaxial test assemblies are costly, and the equipment varies widely. For that reason, only general outlines for triaxial tests are presented. For each laboratory test procedure described, sample calculation(s) and graph(s) are inCluded. Also, blank tables for each test are provided at the end of the manual for student use in the laboratory and in preparing the final report. The accompanying diskette contains the Soil Mechanics LaboratoryTest Software, a stand-alone program that students can use to collect and evaluate the data for each of the 18 labs presented in the book. For this new edition, Microsoft Excel templates have also been provided for those students who prefer working with this popular spreadsheet program. Professor William Neuman of the Department of Civil Engineering at California State University, Sacramento, took inost of the photographs used in this edition. Thanks are due to Professor Cyrus Aryarti of the Department of Civil Engineering at Califoruia State UnIversity, Sacramento, for his assistance in taking the photographs. Last, I would like to thank my wife, Janice F. Das, who apparently possesses endless energy and enthusiasm. Not· only did she type the manuscript, she also prepared all of the tables, graphs, and other line drawings. BrajaM Das dasb@csus.edu

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