Download or read book The Effects of Different Types of Soil on Compaction Curve written by Noor Aishah Jaafar and published by . This book was released on 2007 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soils is an important element that must be considered before develop any construction. The good condition of soils is the most important aspect to make sure the structure or building that constructed did not faced any consequences in future. The compaction test must be carried out to increase the strength of the soils. However, there are some factors that might influence the compaction test result. The factors are moisture content, soil type and compaction effort. The objective of this study is to determine the effects of different types of soil on compaction curve. In addition, the range of Optimum moisture content (OMC) and Maximum dry density (MDD) value can also determined. The data collected are from various places and were chosen randomly. The soils are collected from Raub, Bentong, Temerloh, Maran, Universiti Malaysia Pahang and Gambang. From the laboratory test analysis, the value of Liquid limit (LL), Plastic limit (PL) and Plasticity index (PI) were obtained. In addition, the soils were classified by percent of gravel, sand, silt and clay according Unified Soil Classification System (USCS). The study shows that the compaction curves were produced when the value of dry density and moisture content are plotted. The compaction curve can also be divided into four basic types. There are Type A, Type B, Type C and Type D. The different types of compaction curve show the range of OMC and MDD value. The range values of OMC (%) for type A is 9.5% to 16%, type B is 12.5% to 18%, type C is 4% to 21% and type D is 19%. While the value ofMDD (kN/m3) for type A is 16.5 kN/m3 to 18.6 kN/m3, type B 15.8 kN/m3 to 18.3 kN/m3, type C 14.2 kN/m3 to 16.3 kN/m3 and type D 15.6 kN/m3. As a conclusion, the study also proved that, different types of soils produced different type of compaction curve shape where the range of optimum moisture content (OMC) and maximum dry density (MDD) value can also determined. -Author.

Download or read book Soil Compaction on Forest and Range Lands written by Howard William Lull and published by . This book was released on 1959 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this report is to review available information on soil compaction as related to soil and water conservation on forest and range lands.

Download or read book History of Progress written by W. Allen Marr and published by ASCE Publications. This book was released on 2003-01-01 with total page 2392 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sponsored by the Geo-Institute of ASCE This collection of 78 historical papers provides a wide view of the rich body of literature that documents the development of fundamental concepts geotechnical engineering and their application to practical problems. From the highly theoretical to the elegantly practical, the papers in this one-of-a-kind collection are significant for their contributions to the geotechnical engineering literature. Among the writings of more than 60 geotechnical engineering pioneers are several by Karl Terzaghi, widely known as the father of soil mechanics, R.R. Proctor, Arthur Casagrande, and Ralph Peck. Many of these papers contain information as useful today as when they were first written. Others provide great insight into the origins and development of the field and the thought processes of its leaders.

Download or read book Compaction Behaviour of Soils written by Nurses Kurucuk and published by . This book was released on 2011 with total page 217 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soil compaction is widely applied in geotechnical engineering practice. It is used to maximise the dry density of soils to reduce subsequent settlement under working loads or to reduce the permeability of soils. The durability and stability of structures are highly related to the appropriate compaction achievement. The structural failure of roads and airfields, and the damage caused by foundation settlement can often be traced back to the failure in achieving adequate compaction. For that reason, soil compaction is important for engineering activities involving earthworks. Compacted soils are unsaturated by nature, which includes both air and water within their voids. Thus, unsaturated soil mechanics principles are crucial in understanding the compaction behaviour of soils. There are several qualitative studies, which attempt to explain the compaction behaviour of soils and there is a vast body of literature covering the behaviour of compacted soils. Still, fundamental research on the compaction process is limited. In addition, the current constitutive models available for unsaturated soils assume that the soil state after compaction is the initial state of the soil. However, compacted soils undergo a stress history which influences the post compaction behaviour. Considering these facts, it still remains that the compaction of soil is a complex phenomenon, which is not well explained, particularly from a quantitative sense. Further understanding of the compaction behaviour during the compaction process will provide important insights on the behaviour of compacted soils. The main aim of this research project is to extend the current understanding of the compaction process of soils. The research focuses on three different areas: investigating the experimental behaviour of soils during the static compaction process and obtaining data for compaction modelling; developing a compaction model using the existing constitutive models for unsaturated soils; and evaluating the performance of this model in predicting the compaction behaviour of soils. In the experimental part, static compaction tests were conducted on two different granular soils, sand with 2% and 5% bentonite content by weight. The tests were undertaken on samples with different water contents in order to observe the effect of matric suction on the compaction behaviour. The initial matric suction of the specimens was measured using the null type axis translation technique and the matric suction variations were monitored during the compaction process. It was found that the unsaturated samples were always more compressible than the saturated sample. This finding is contrary to the assumption made in most constitutive models, and thus modelling the compaction behaviour using these models may result in some deficiencies. In addition, in granular soils with low water content the axis translation technique was found to be very time consuming for the suction measurements. This was attributed to the discontinuous water phase within the samples. To develop a compaction model, a volume change constitutive relationship for unsaturated soils, defined in terms of two independent stress variables, was incorporated with pore pressure predictions. The model was developed for undrained, semi-drained and drained loading conditions. Initially, compressibility coefficients in the volume change relationship were considered as constant parameters, i.e., the compressibility of a soil element does not change with increasing vertical stress. Using constant compressibility coefficients, the compaction curve can be predicted only for the wet side of the curve, not the dry side. Thus, variable compressibility coefficients were derived from constitutive models proposed in the literature, and using these coefficients, the well-known shape of the compaction curve was predicted on both dry and wet side of the compaction curve. It was found that the shape of the compaction curve can be the theoretically predicted using unsaturated soil mechanics principles. The main insight gained from the model development was that the influence of matric suction on the material compressibility with respect to net stress is the governing factor determining the inverted parabolic shape of the compaction curve. The performance of the compaction models were examined on their ability to predict the compaction behaviour of soils. Data for four different soils, two sand-bentonite mixtures tested in this study, and Boom clay and Speswhite kaolin data from literature, were used for models evaluation. Two different constitutive modelling approaches were analysed, which are the separate stress state variables approach and combined stress state approach. It was concluded that the samples prepared from initially slurry soils and from initially dry soils could not be treated the same and would require the use of different sets of soil parameters. In addition, the compaction behaviour of soils, prepared from initially dry samples, could only be modelled over a narrow range of water contents using a single set of soil parameters. Minimum two sets of soil parameters are required to model the compaction behaviour over a wide range of water contents with the current constitutive models.

Download or read book Geotechnics for Sustainable Infrastructure Development written by Phung Duc Long and published by Springer Nature. This book was released on 2019-11-28 with total page 1417 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents 09 keynote and invited lectures and 177 technical papers from the 4th International Conference on Geotechnics for Sustainable Infrastructure Development, held on 28-29 Nov 2019 in Hanoi, Vietnam. The papers come from 35 countries of the five different continents, and are grouped in six conference themes: 1) Deep Foundations; 2) Tunnelling and Underground Spaces; 3) Ground Improvement; 4) Landslide and Erosion; 5) Geotechnical Modelling and Monitoring; and 6) Coastal Foundation Engineering. The keynote lectures are devoted by Prof. Harry Poulos (Australia), Prof. Adam Bezuijen (Belgium), Prof. Delwyn Fredlund (Canada), Prof. Lidija Zdravkovic (UK), Prof. Masaki Kitazume (Japan), and Prof. Mark Randolph (Australia). Four invited lectures are given by Prof. Charles Ng, ISSMGE President, Prof.Eun Chul Shin, ISSMGE Vice-President for Asia, Prof. Norikazu Shimizu (Japan), and Dr.Kenji Mori (Japan).

Download or read book Geotechnics of Roads Fundamentals written by Bernardo Caicedo and published by CRC Press. This book was released on 2018-11-12 with total page 569 pages. Available in PDF, EPUB and Kindle. Book excerpt: At first glance, roads seem like the simplest possible geotechnical structures. However, analysis of these structures runs up against complexities related to the intense stresses experienced by road surfaces, their intense interaction with climate, and the complicated behavior of the materials used in road construction. Modern mechanistic approaches to road design provide the tools capable of developing new technical solutions. However, use of these approaches requires deep understanding of the behavior of constituent materials and their interaction with water and heat which has recently been acquired thanks to advances in geotechnical engineering. The author comprehensively describes and explains these advances and their use in road engineering in the two-volume set Geotechnics of Roads, compiling information that had hitherto only been available in numerous research papers. Geotechnics of Roads: Fundamentals presents stresses and strains in road structures, water and heat migration within and between layers of road materials, and the effects of water on the strength and stiffness of those materials. It includes a deep analysis of soil compaction, one of the most important issues in road construction. Compaction accounts for only a small proportion of a construction budget but its effects on the long-term performance of a road are decisive. In addition, the book describes methodologies for nondestructive road evaluation including analysis of continuous compaction control, a powerful technique for real-time quality control of road structures. This unique book will be of value to civil, structural and geotechnical engineers worldwide.

Download or read book Geotechnics of Roads 2 Volume Set written by Bernardo Caicedo and published by CRC Press. This book was released on 2022-05-29 with total page 782 pages. Available in PDF, EPUB and Kindle. Book excerpt: At first glance, roads seem like the simplest possible geotechnical structures. However, analysis of these structures runs up against complexities related to the intense stresses experienced by road surfaces, their intense interaction with climate, and the complicated behavior of the materials used in road construction. Modern mechanistic approaches to road design provide the tools capable of developing new technical solutions. However, use of these approaches requires deep understanding of the behavior of constituent materials and their interaction with water and heat which has recently been acquired thanks to advances in geotechnical engineering. The author comprehensively describes and explains these advances and their use in road engineering in the two-volume set Geotechnics of Roads, compiling information that had hitherto only been available in numerous research papers. Geotechnics of Roads: Fundamentals presents stresses and strains in road structures, water and heat migration within and between layers of road materials, and the effects of water on the strength and stiffness of those materials. It includes a deep analysis of soil compaction, one of the most important issues in road construction. Compaction accounts for only a small proportion of a construction budget but its effects on the long-term performance of a road are decisive. In addition, the book describes methodologies for nondestructive road evaluation including analysis of continuous compaction control, a powerful technique for real-time quality control of road structures. Geotechnics of Roads: Advanced Analysis and Modeling develops 23 extended examples that cover most of the theoretical aspects presented in the book Geotechnics of Roads, Fundamentals. Moreover, for most examples, Volume 2 describes algorithms for solving complex problems and provides Matlab® scripts for their solution. Consequently, Volume 2 is a natural complement of the book Geotechnics of roads: Fundamentals. This unique set will be of value to civil, structural and geotechnical engineers worldwide.

Download or read book Comparison of Compaction Data Developed by Various Types of Mechanical and Hand Compaction Hammers written by Waterways Experiment Station (U.S.) and published by . This book was released on 1959 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Impact of Soil Type and Compaction Conditions on Soil water Characteristic Curves written by Kareem Yaldo and published by . This book was released on 1999 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Geotechnical Engineering Soil Mechanics written by T G Sitharam and published by S. Chand Publishing. This book was released on 2008 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this book,a chapter on stability of slopes has been included as most of the universities cover this in the first course of Geotechnical Engineering.The contents of this volume are written at a basic level suitable for a first course inGeotechnical Engineering.This book highlights the basic principles of soil mechnics along with applications to many problems in Geotechnical Engineering.The material is covered in a very simple,clear and logical manner.A number of solved and exercise problems have been included in each chapter.

Download or read book Soil Quality for Crop Production and Ecosystem Health written by E.G. Gregorich and published by Elsevier. This book was released on 1997-11-10 with total page 465 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soil is a complex body that exists as many types, each with diverse properties that may vary widely across time and space as a function of many factors. This complexity makes the evaluation of soil quality much more challenging than that of water or air quality. Evaluation of soil quality now considers environmental implications as well as economic productivity, seeking to be more holistic in its approach.Thus, soil quality research draws from a wide range of disciplines, blending the approaches of biologists, physicists, chemists, ecologists, economists and agronomists, among others.This book presents a broad perspective of soil quality that includes these various perspectives and gives a strong theoretical basis for the assessment of soil quality.A short glossary provides definitions for terms used throughout the book.

Download or read book Correlations of Soil and Rock Properties in Geotechnical Engineering written by Jay Ameratunga and published by Springer. This book was released on 2015-12-11 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a one-stop reference to the empirical correlations used extensively in geotechnical engineering. Empirical correlations play a key role in geotechnical engineering designs and analysis. Laboratory and in situ testing of soils can add significant cost to a civil engineering project. By using appropriate empirical correlations, it is possible to derive many design parameters, thus limiting our reliance on these soil tests. The authors have decades of experience in geotechnical engineering, as professional engineers or researchers. The objective of this book is to present a critical evaluation of a wide range of empirical correlations reported in the literature, along with typical values of soil parameters, in the light of their experience and knowledge. This book will be a one-stop-shop for the practising professionals, geotechnical researchers and academics looking for specific correlations for estimating certain geotechnical parameters. The empirical correlations in the forms of equations and charts and typical values are collated from extensive literature review, and from the authors' database.

Download or read book Encyclopedia of Agrophysics written by Jan Gliński and published by Springer Science & Business Media. This book was released on 2011-06-07 with total page 1075 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Encyclopedia of Agrophysics will provide up-to-date information on the physical properties and processes affecting the quality of the environment and plant production. It will be a "first-up" volume which will nicely complement the recently published Encyclopedia of Soil Science, (November 2007) which was published in the same series. In a single authoritative volume a collection of about 250 informative articles and ca 400 glossary terms covering all aspects of agrophysics will be presented. The authors will be renowned specialists in various aspects in agrophysics from a wide variety of countries. Agrophysics is important both for research and practical use not only in agriculture, but also in areas like environmental science, land reclamation, food processing etc. Agrophysics is a relatively new interdisciplinary field closely related to Agrochemistry, Agrobiology, Agroclimatology and Agroecology. Nowadays it has been fully accepted as an agricultural and environmental discipline. As such this Encyclopedia volume will be an indispensable working tool for scientists and practitioners from different disciplines, like agriculture, soil science, geosciences, environmental science, geography, and engineering.

Download or read book Drainage of Agricultural Lands written by James N. Luthin and published by Wiley-Blackwell. This book was released on 1957 with total page 648 pages. Available in PDF, EPUB and Kindle. Book excerpt: The physics of land drainage. The theory of land drainage. Engineering aspects of land drainage. Drainage invfestigation methods. Land drainage in relation to soils and crops.

Download or read book Fundamentals of Soil Physics written by Daniel Hillel and published by Academic Press. This book was released on 2013-10-22 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is not, in any case, in total defiance of the Wise Old Man's admonition, for it is not an entirely new book. Rather, it is an outgrowth of a previous treatise, written a decade ago, entitled "Soil and Water: Physical Principles and Processes." Though that book was well enough received at the time, the passage of the years has inevitably made it necessary to either revise and update the same book, or to supplant it with a fresh approach in the form of a new book which might incorporate still-pertient aspects of its predecessor without necessarily being limited to the older book's format or point of view.

Download or read book Soil Compaction in Crop Production written by B.D. Soane and published by Elsevier. This book was released on 2013-10-22 with total page 695 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a global review of the mechanisms, incidence and control measures related to the problems of soil compaction in agriculture, forestry and other cropping systems. Among the disciplines which relate to this subject are soil physics, soil mechanics, vehicle mechanics, agricultural engineering, plant physiology, agronomy, pedology, climatology and economics.The volume will be of great value to soil scientists, agricultural engineers, and all those involved with irrigation, drainage and tillage. It will help to facilitate the exchange of information on current work throughout the world, as well as to promote scientific understanding and stimulate the development, evaluation and adoption of practical solutions to these widespread and urgent problems.

Download or read book Geotechnical Hazards written by Z. Lisac and published by CRC Press. This book was released on 2020-12-17 with total page 907 pages. Available in PDF, EPUB and Kindle. Book excerpt: The contributions to this volume examine: geotechnical hazard acknowledging the deversity of local ground conditions and environmental factors which play a decisive role in designing engineering structures in Danubian countries.