Controls is specialized in soil mechanics testing equipment. test systems that are capable of replicating the complex phenomena in a laboratory environment. Page 1 of GEOTECHNICAL TEST PROCEDURE: SOIL MECHANICS LABORATORY TEST PROCEDURES. GTP Revision #4. STATE OF NEW YORK. Laboratory Testing Manual Soil Mechanics Testing. CML test method, reference number. Tests on Soils and Gravels. Moisture Content. BSPart.
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Laboratory testing of soil
Development of high-precision soils testing equipment for measuring very small strains, radial strains and dynamic shear modulus using bender elements. Aside from this, the facility is used commercially.
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The process is called consolidation and results in a higher unit soil mechanics laboratory tests and a decreased void ratio.
soil mechanics laboratory tests Testing Procedures Since soils exist in an enormous variety, and since the problems of applied soil mechanics exist in a very great variety, soil mechanics laboratory tests procedures for determining the engineering properties of soils such as strength- deformation relationships cannot be standardized.
Before any soils testing is requested of a laboratory, the design engineer responsible for formulating the testing program must clearly define the purpose of each test to himself and to the person who will supervise the testing. It is generally necessary to adapt the testing procedures to the specific requirements of an investigation.
For example, the consolidation test can be performed in various ways.
GEOTECHNICAL LAB MANUAL
This procedure will produce time-consolidation curves that usually permit the most precise evaluation of the coefficients soil mechanics laboratory tests permeability and consolidation.
However, these load increments are not always satisfactory for defining the preconsolidation pressure from the soil mechanics laboratory tests of the void ratio-pressure curve; for this purpose, a much smaller factor than 2. In addition, the maximum load to which a consolidation test should be continued will depend on the consistency and stress history of the soil and the requirements of the project.
For example, if clay that had been normally consolidated under an effective overburden pressure of 1 ksf is to be loaded by an embankment that will exert an additional pressure of 2 ksf, the consolidation test need not be continued beyond a load of 8 ksf to fulfill the purpose of the test.
Soil Mechanics Laboratory - Soil Testing Lab - United Consulting
On the other hand, highly overconsolidated clay that will be loaded by an embankment of substantial height soil mechanics laboratory tests require that the consolidation test be continued to a loading of 40 ksf or more.
An even greater variety in testing procedures exists for measuring the strength of soils, and the purpose of the tests must be soil mechanics laboratory tests reviewed to insure that the results have meaning with respect to design.
Tests that do not measure clearly defined engineering properties such as Atterberg limits, specific gravity, grain-size analyses, and compactionhowever, do require adherence to standardized procedures. Even here, the dangers of injudicious testing must be recognized.
Deviations from these procedures may be necessary on occasion, according to the judgment of testing or design engineers, their experience with local soils, or soil mechanics laboratory tests of a project.
However, to insure that the test methods remain compatible with the purpose of the tests and that the results will be acceptable, every such deviation should be discussed in advance with the design office requesting the tests.
In addition, a description of any non-conventional procedure must accompany the test data. Reliability of Testing Apparatus and Responsibility of Personnel All who are engaged in soils testing must constantly be aware of soil mechanics laboratory tests importance of accuracy in measurement.
Inaccurate measurements will produce test results that are not only valueless but are misleading.
Soil Mechanics Laboratory
Each test described below contains a list of the more common possible soil mechanics laboratory tests associated with the procedures described in that test. Serious errors can be caused by poorly constructed apparatus for example, piston friction in triaxial compression chambers or rough finished soil mechanics laboratory tests ringsby maladjusted apparatus liquid limit devices, proving rings, or mechanical compactorsand by worn parts liquid limit cup or grooving tool or knife edges of lever systems.
Regular calibration and inspection must be a standard practice in all laboratories.
The personnel performing the tests must be thoroughly familiar with the apparatus, the testing procedures, and good laboratory technique in general. They must be conscientious in the handling of soils and must appreciate soil mechanics laboratory tests purpose of each test they perform.