This text is a compendium of five decades of work relating to science, mechanics and improvement of highly expansive soil systems, application of improved methods to construction of stable civil engineering structures on such deposits. He has used a particulate approach incorporating thermodynamic properties of soil particles as matter to predict the behaviour of saturated expansive soil. The compiling of this massive work has been the effort of the co-authors. The behaviour of expansive soil deposits is found to be unconventional in nature. Prof. Katti has focused on the difference in behaviour by conducting identical studies on conventional soil systems. The book covers topics on basic property, swelling and swelling pressure measurements, shear strength behaviour under various conditions including depth effect, lateral earth pressure development under Ka, Ko and Kp conditions using large-scale devises, discovery of CNS technology and its field application, bearing capacity aspect with and without CNS and MSM, expansive soil improvement techniques, approach to design of rigid and flexible pavements, shallow and raft foundations; optimum length, Hd of underreamed piles, similarity between suction pressure measure approach and cohesion measure approach, use of conventional and small scale test data and simplified approach to estimate he and h, standards, and mechanics of expansive soil media and case histories. He has brought about limitations of existing conventional theories to deal with expansive soil behaviour and the need for incorporating thermodynamic parameters to predict behaviour of saturated expansive soils. This is a unique treatise covering the entire realm of behaviour of saturated expansive soil and control methods. It can act as a database for future research workers and scholars as a guide for construction for practicing engineers and as a sequentially organised scientifically based book for students.

Table of Contents:
Foreword to the revised & enlarged edition; Foreword to the first edition; Preface to the revised & enlarged edition; Preface to the first edition; Acknowledgements; Introduction; Conventional properties; In-situ properties; Swelling pressure and heave; Shear strength studies; Shear strength studies with CNS-layer technique; Literature of lateral pressure theories of conventional soil system; Investigations on MRBC 76 soil for Ko condition; Studies on MRBC 37 soil system for Ko condition with additional instrumentation; Lateral pressure development under Ka condition; Development of mathematical relations based on cohesion concept and microparticle approach for application to lateral pressure development for K0 and Ka conditions; Lateral pressure under Kp condition; Bearing capacity aspects with and without CNS and MSM; Soil improvement; Mechanics of saturated expansive soil media; Guidelines for lining canals in expansive soils; Simplex concrete piles (I) LTD.: Procedure for manufacture, placement and quality assurance of CNS for foundations; Standard; Case history of application of CNS technology for IGNP canal at SMGS and SBS branches passing through bentonite deposits; Case history on foundation considerations for certain structures and equipment in a gas-sweetening plant at Hazira; Foundation for water pre-treatment plant for gas-based power plant at Anta, Rajasthan; Stress deformation controlled approach to construction of rigid and flexible pavements for express highway passing through Deccan trap region and expansive black cotton soil stretch, a case study; Procedure for design and construction of shallow foundations in expansive clayey soils with CNS and MSM technology; An approach to settlement analysis of a raft founded on a subsurface having expansive soil horizon overlain by a CNS horizon; Assessment of equilibrium depth Hd of under reamed piles based on passive resistance development in expansive soils; Guidelines for subsurface investigation in expansive clayey soils; Transmitted swelling pressure in retaining structures; Coulombian-cohesion approach to engineering of expansive soil deposits – field performance; Statement of soil mechanics by Terzaghi – need for incorporating other factors to minimize variance; Approach to design of thickness of CNS intercepting layer using conventional / small scale test data simulating field behaviour for the construction of stable civil engineering structure on deep seated expansive soil deposits and development of simplified procedure; References; Index; About the authors.