Manual of soil laboratory testing. Volume 3: Effective stress tests / Руководство по лабораторным методам исследования почв. Том 3. Эффективные стресс-тесты

This book is the third in a series of three, intended primarily to provide a working manual for laboratory technicians and others engaged in the testing of soils for building and engineering purposes. It is not meant in any way to be used as a substitute for the Standards referred to therein, but to augment their requirements by the provision of step by step procedures. This third edition has been revised to take account of the current requirements of BS 1377: 1990, including recent amendments, and recent developments in electronic instrumentation and computer technology. It has been re-arranged so that the fi rst four chapters describe theory, equipment and calibration and the last four chapters describe test procedures. In so doing, we have removed the rarely used B bar test, substantially revised the chapter on other triaxial compression tests (Chapter 20), and introduced the accelerated permeability test for the testing of clays for landfi ll liners to Chapter 21. We have also amended the test procedures to take account of the use of electronic data loggers and instrumentation to record test measurements.

The section on Calibration in Chapter 18 has been revised to update references to current British Standards and to take account of the requirements of BS EN ISO 17025:2005. This includes a description of the procedures to follow to estimate the uncertainty of measurement of testing instruments, with an example being given in Appendix D.

It has been assumed that the user has a basic knowledge of mathematics and physics. This is necessary in order to appreciate the signifi cance and limitations of the tests and to understand certain basic principles which are sometimes diffi cult to grasp. We hope that this book will continue provide a useful resource that is well used in the laboratory. We would welcome any comments and criticisms from those who use it <...>