2 edition of Constant rate of loading consolidation test found in the catalog.
Constant rate of loading consolidation test
Kurt F. von Fay
by Geotechnical Branch, Division of Research and Laboratory Services, Engineering and Research Center, Available from the National Technical Information Service, Operations Division in Denver, Colo, Springfield, Va
Written in English
|Statement||by Kurt F. von Fay, Charles E. Cotton.|
|Contributions||Cotton, Charles E., Engineering and Research Center (U.S.). Geotechnical Branch.|
|The Physical Object|
|Pagination||iv, 32 p. :|
|Number of Pages||32|
rate of consolidation occurs. Compressibility A greater compressibility leads to a greater decrease in the void space of the soil for a particular stress change. This means that a greater volume of water must be expelled from the soil and this will require a longer time. Consequently a lower rate of consolidation will Size: KB. The consolidation test was carried out by following JIS A (test method for one-dimensional consolidation properties of soils using incremental loading), except for the incremental loading ratio and the duration at each loading stage. The diameter of the specimen was 60 mm, and its initial height was 20 mm. Drainage was allowed at both Author: TanakaHiroyuki, TsutsumiAyato.
The LoadTrac III / FlowTrac III system consolidates the sample through a loading path specified by using constant rate of strain loading. The FlowTrac III is used during the back pressure saturation as well as maintaining a constant cell pressure during the consolidation phase of the test. Preconsolidation pressure is the maximum effective vertical overburden stress that a particular soil sample has sustained in the past. This quantity is important in geotechnical engineering, particularly for finding the expected settlement of foundations and embankments. Alternative names for the preconsolidation pressure are preconsolidation stress, pre-compression stress, pre-compaction.
CONSOLIDATION TEST ive Consolidation test is used to determine the rate and magnitude of soil consolidation when the soil is restrained laterally and loaded axially. The Consolidation test is also referred to as Standard Oedometer test or One-dimensional compression test. This test is carried out on saturated soil specimens,File Size: KB. the constant rate of strain (CRS) consolidation test. The CRS consolidation test is usually carried out using a strain rate reasona- bly higher than the end-of-primary strain rate, so that only small excess pore water pressure is developed at the bottom of speci-.
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Get this from a library. Constant rate of loading consolidation test. [Kurt F von Fay; Charles E Cotton; Engineering and Research Center (U.S.). Geotechnical Branch.]. Recently, several other test methods have been developed, among them the constant-rate-of-loading (CRL) consolidation test. A versatile CRL apparatus, developed by the Bureau of Reclamation Engineering and Research Laboratory, is described.
Test results from the CRL apparatus are compared with results from the STD by: 3. The “constant rate of strain” consolidation test has been widely used for several decades to provide a continuous load–displacement response.
An exact theoretical solution can be obtained for this consolidation by: 3. Other non-standard methods exist for consolidation testing such as Constant Rate of Loading (CRL), Constant Pore Pressure Gradient (CG) and Consolidation with Control of Back Pressure (BPC) all of which are outside the scope of this document.
8 Test Procedure – One Dimensional Consolidation. The constant-rate-of-strain (CRS) consolidation test was introduced in (I); the theory for complete reduction of data was developed in (2). In (3), the CRS test was compared with the controlled-gradient and incremental-load consolidation tests.
Cited by: 2. A consolidation test method with constant rates of loading is proposed as an alternative of the standard consolidation test, conventionally used in the laboratory. In the proposed method, a consolidation test is completed between 2 and 3 hours, and the settlement and base pore pressure are automatically measured and by: Key word: consolidation, CL test programming, loading velocity path.
INTRODUCTION Inclassicalconsolidationtheory,theissueofloadingveloc - ity is not taken into consideration. In Terzaghi’s interpretation, consolidation is a process of pore water pressure dissipation and accompanied strain at constant load.
Consolidation prog. The constant rate of strain (CRS) oedometer test, using an imposed vertical strain rate equal to 10 times the end-of-primary (EOP) vertical strain rate, requiring a test duration of about 2 days produces reliable information on both the e versus log relation and e versus logk v Author: Gholamreza Mesri, Tao-Wei Feng.
ABSTRACT: Constant rate of strain consolidation test is a fast test method to characterize consolidation behavior of fine grained soils.
In this test method, the test specimen is deformed at a. In geotechnical practice, there are two test methods for determining the consolidation characteristics of clayey soil, namely incremental loading (IL) consolidation test and constant rate of strain (CRS) consolidation test.
IL test is more convenient to be conducted and the equipment is relatively simple, and therefore more popular than CRS. those which keep a constant “rate of loading/pore water pressure” ratio (in the undrained base of the specimen), the Continuous Loading consolidation test (CL) are the most common alternative testing methods in comparison with the variable loading consolidation tests.
The common feature in all these. The results of incremental loading (IL) consolidation tests and constant rate of strain (CRS) consolidation tests for the soil samples from 5 boreholes in Saga, Japan, have been presented, compared and discussed.
Although there are scatters on test data, generally for the strain-rate tested ( – %/min), consolidation yielding stress (pc)File Size: KB. Consolidation Characteristics of Clay Using Constant Rate of Deformation Test.
The One-Dimensional Consolidation Test A one-dimensional (1-D) consolidation test9 is widely used to obtain the settlement and time parameters. Al-D test confines the soil laterally in a metal ring so that settlement and drainage can occur only in the vertical direction. These conditions are reasonably close to what occurs in situ for.
The Hydrocon hydraulic consolidation cell is the basic part of the apparatus used for the determination of the magnitude and rates of consolidation of soil specimens of relatively low permeability using hydraulically loaded apparatus.
The ramp loading laboratory tests clearly demonstrate that the normalized 2 U-T plot for instantaneous and constant rate loading 3 Normalized settlement-time plot Post-construction consolidation. Abstract. Constant rate of strain (CRS) consolidation test is a fast test method to characterize consolidation behavior of fine grained soils.
In this test method, the test specimen is deformed at a constant rate of deformation, and pore water pressure at the base of the test specimen and axial reaction load are measured at successive interval during the : Gyan Vikash, Ramyasri Rachamadugu.
continuous consolidation testing There appears to be at least seven ways of carrying out tests to determine the consolidation characteristics of clays, (excluding the odeometer or Rowe cell). The author discusses the problems of selecting the most suitable procedure for continuous loading giving the salient features of each type of test, and Author: K H Head.
Consolidation at Constant Rate of Strain. A new general purpose consolidometer for studying the one-dimensional consolidation behavior of soils is described. The test specimen can be loaded incrementally, as in the conventional test, at a constant rate of stress, or at a constant rate of strain. The apparatus can also be used to measure residual pore pressures and swell pressures during back Cited by: Note that there is also a constant rate of strain (CRS) test, that nowadays is becoming more popular.
Test Set-up Components. A typical Oedometer test set-up, shown in Figure 1, is composed of: i) a consolidation cell, ii) a loading frame, and iii) a deformation measurement mechanism.
The consolidation cell consists of the following components. D / DMe1 Standard Test Method for One-Dimensional Consolidation Properties of Saturated Cohesive Soils Using Controlled-Strain Loading consolidation coefficient~ constant-rate-of-strain~ settlement~ consolidation test~ cohesive soils~.
The moving boundary theory of consolidation is used to study a thin specimen undergoing a constant rate of deformation: an idealized condition in the so-called constant rate of strain consolidation by: ABSTRACT: Controlled-gradient (CG), constant-rate-of-strain (CRS), and conventional incremental-loading (STD) consolidation testing are compared and evaluated.
Undisturbed samples of tbree soils common to Kentucky were used in the testing program. Results of I 5 CG, 14 CRS, and 32 STD consolidation tests are by: