Unconsolidated undrined triaxial compression uu test. Geotechnical engineering lab instruction manual 1 1. Iit gandhinagar, soil mechanics lab page1 indian institute of technology gandhinagar department of civil engineering soil mechanics laboratory unconsolidated undrained triaxial compression uu test is 2720part 111993 reaffirmed2002 concept. Standard test method for consolidated undrained triaxial. Although the oedometer and the drained triaxial tests see also benchmark 49 show good agreement with the results from the laboratory tests, the results from the undrained triaxial tests show deviation from the experimental results see figs. The consolidated isotropic undrained triaxial test is the most common type of triaxial test. This change to em 111021906,30 november 1970, provides the updating of the table of contents and the addition of the following four 4 appendices. In this test, soil sample is subjected to stress, such that the stress resulted in one direction will be different in perpendicular direction. The autotriax automatic system for triaxial tests in use of the laboratory, beyond the traditional standard tests, has been specifically designed to perform stress path tests, where the principal stresses applied to the soil specimen are managed independently, to replicate whichver stress conditions encountered on. Triaxial lab data input another feature of roclab is the ability to input triaxial lab test data sigma1 sigma3 data pairs in order to determine the intact rock parameters sigci and m i.
However, if a test was identical to an aashto, ast, or mftp procedure it was not m duplicated in this manual. This instruction manual guides the students to conduct the test as per. Iit gandhinagar, soil mechanics lab page1 indian institute of technology gandhinagar department of civil engineering soil mechanics laboratory unconsolidated undrained triaxial compression uu test is 2720part 111993 reaffirmed2002 theory. The apparatus for a typical triaxial test is shown in the column to the right. Egce 324l soil mechanics laboratory spring 2008 instructor. Triaxial uucucd test systems triaxial test systems. Introduction this paper presents the dynamic cyclic triaxial testing of soils in the laboratory.
Effective stress tests 3 rd edition by k h head and r j epps. Laboratory tests to determine shear strength of soils lecture topics o brief overview of direct shear test o determine soil shear strength parameters from triaxial tesng. Department of construction engineering advanced geotechnical laboratory chaoyang university of technology triaxial shear testing 2 triaxial cells triaxial tests are performed using a triaxial cell. 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. Lambe and the measurement of soil properties in the triaxial test by a. The laboratory determination of intact rock strength is accomplished by the following tests. In this test, the saturated soil specimen is first consolidated by an allaround chamber fluid pressure. Triaxial shear strength test on soil measures the mechanical properties of the soil. This video is prepared in 2011 by middle east technical university civil. For each laboratory test procedure described, sample calculations and graphs are included. The unconfined compression test is by far the most popular method of soil shear testing. The books provide an indepth understanding behind the theory of the test and also the testing procedures including quality control and analysis. The undrained triaxial strength tests are used to determine the shear strength of a soil sample that is not allowed to drain. The test results will be analyzed to determine the mohrcoulomb failure envelope, failure angle, shearing resistance, and youngs modulus of elasticity.
Unconsolidated, undrained triaxial compression test 49 14. Advanced triaxial testing part 2 is due to be released may 20 visit. The triaxial test procedures have been developed from those which are described in soil testing for engineers by t. A deaired, coarse porous disc or stone is placed on the top of the pedestal in the triaxial test apparatus. By comparison, effective stresses when measured in a triaxial cell are more complex in their nature, as numerous parameters can be measured.
Lab manual mainly deals with the common and standard laboratory tests on different types of soil. Triaxial cdcuuu equipment is computer controlled, test values can be transferred to computer and data processing can be made with triaxial software on windows operating system. Iit gandhinagar, soil mechanics lab page 1 indian institute of technology gandhinagar department of civil engineering soil mechanics laboratory consolidation test oedometer test is 2720part151986 reaffirmed2002 theory. A normal triaxial testing system includes a device capable of applying a load to the top of the specimen, a chamber capable of applying a confining pressure to the entirety of a specimen, and systems capable of measuring the load, pressure, and deformation of the specimen. Soil testing equipment and software ele international. Design manual engineering properties of soil and rock. Introducon to geotechnical engineering o us army corps of engineers. Vj tech would recommend these books to any technician or laboratory undertaking triaxial tests. This manual provides guidance to administrative, engineering, and technical staff. The data can be entered directly into a spreadsheet in the dialog, pasted from the clipboard, or the data can. Geotechnical engineering lab lab manual gopalan colleges. In a triaxial shear test, stress is applied to a sample of the material being tested in a way which results in stresses along one axis being different from the. The experiment is stopped at the strain dial gauge reading for 20% of length of the sample or 20% strain.
Laboratory testing and interpretation of rock properties. In addition, local experience, correlations to local geologic formations, and relevant published data should also be considered in the final. Graduates shall demonstrate sound knowledge in analysis, design, laboratory investigations and construction aspects of civil engineering infrastructure, along with good foundation in mathematics, basic sciences and. Triaxial tests are a useful tool to determine deformationspecific. Cohesion c and angle of internal friction o, though it is bit complicated. The material properties of the soil like shear resistance, cohesion and the dilatancy stress is determined from this test. For those operations, which do not require automated control, humboldts hm4164 and hm4165 manual triaxial control panels provide an accurate and easytooperate solution for controlling compressed air, water, deaired water and vacuum within an airwater bladdertype triaxial testing system. Laboratory manual triaxial cd test free download as pdf file. Laboratory manual triaxial cd test mechanics chemical. D3740 practice for minimum requirements for agencies engaged in testing andor inspection of soil and rock as used in engineering design and construction. Triaxial compression tests uu, cu, cd9 table of contents. Laboratory triaxial deformation tests on eight samples from different depths in the two drilled sections see table t1 should provide information on the static stress strain behavior of the sedimentary rocks of both sites. The modified triaxial design method requires the use of the subgrade andor base texas triaxial class as derived from laboratory test results.
The load data and axial displacement data are transfered and recorded through utouch pro control unit to the software. Objective the triaxial shear test is most versatile of all the shear test testing methods for getting shear strength of soil i. To find the shear of the soil by undrained triaxial test. Introduction to triaxial testing prepared by dr sean rees, geotechnical specialist at gds instruments overview. It briefly discusses why dynamic tests are required, the soil parameters that.
Preface this laboratory soil testing manual provides a detailed guide of fourteen common laboratory soil tests. Pdf soil mechanics ii lab manual jayashree sengupta. Undrained triaxial compression tests laboratory experiment. The details of design of triaxial cells vary from laboratory to laboratory but the essential features of typical cells are shown in fig. The results of the analysis are used to determine the minimum amount of material, better than the subgrade, required to prevent. To determine the specific gravity of a coarse grained soil sample by pycnometer method. Page no 1 determination of moisture content 09 2 determination of specific gravity 11 3 determination of atterbergs limits 14 4 determination of relative density 23 5.
The test will be completed on three unsaturated soil samples. Every effort has been made to make this manual complete and accurate. After the pore water pressure generated by the application of confining pressure is dissipated, the deviator stress. Unconsolidated undrained consolidated undrained o triaxial test setup and behaviour. The manual follows the astm standards published in the 2006 annual book. Testing equipment for the construction industry controls. Waterways experiment station wes under dipection from the. D2850 test method for unconsolidatedundrained triaxial compression test on cohesive soils.
Eles materials testing equipment enables the accurate classification of soils and the measurement of key parameters such as moisture, density, shear strength, permeability, bearing capacity, compaction and cbr, consolidation, atterberg limits shrinkage limit, plastic limit, and liquid limit, particle size distribution, sand equivalent value, slope stability, triaxial soil strength, pore. Laboratory testing of soils and rocks is a fundamental element of geotechnical engineering. This manual can be used as a textbook in civil engineering undergraduate program as. Expect these complete solutions to help you effectively manage and control the forces, pressures. This lab manual was prepared with the help of astm and. Bring observation note books, lab manuals and other necessary things for the class. A triaxial shear test is a common method to measure the mechanical properties of many deformable solids, especially soil e. This edition completely replacesy 201the 9 labofebruarratory manual of test procedures.
Table of contents mdot geotechnical manual page i november 2019. An extension of the qu test is the unconsolidated undrained test uu. D4220 practices for preserving and transporting soil samples. Consolidation test determination of compression index and coefficient of consolidation. Introduction this paper provides an introduction to the triaxial test, explaining why the test is performed, the stress state of a tested soil, required.
Properties selected for design should be based on the results of field testing, laboratory testing, or back analysis of existing conditions. For that reason, only general outlines for triaxial tests are presented. Slope stability, appendix d shear strength characteriscs em 1110. Determination of shear parameter of soil by triaxial test standard penetration test experiment no. Civ e 353 geotechnical engineering i shear strength of. Triaxial shear test figure 1 triaxial compression testing device. The mts model 815 and 816 rock mechanics test systems deliver exactly what geological. The complexity of testing required for a particular project may range from a simple moisture content determination to sophisticated triaxial strength testing. Bottom, right lab testing equipment, direct shear and triaxial testing apparatuses. The standard consolidated undrained test is compression test, in which the soil specimen is first consolidated under all round pressure in the triaxial cell before failure is brought about by increasing the major principal stress.
This three part series has been written to introduce one of the most versatile tests in the geotechnical laboratory the triaxial test. This manual has the current versions of our laboratory test procedures. Ce 344 geotechnical engineering sessionali lab manual. When a compressive load is applied to soil mass, a decrease in its volume takes place, the decrease in volume of soil mass. Unconsolidated, undrained triaxial compression test.
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