ASTM D4318 PDF
De1 Standard Test Methods for Liquid Limit, Plastic Limit, and Plasticity Index of Soils. Format, Pages, Price. PDF ASTM License Agreement. This standard is issued under the fixed designation D ; the number 1 This standard is under the jurisdiction of ASTM Committee D18 on Soil and. limit, plastic limit, and the plasticity index of soils as defined Atterberg limits. the several consistency states of plastic soils. Two methods for determining the liquid limit are pro- when using these tests to evaluate properties of a soil.
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This SOP is intended for use with ASTM D (Appendix 2). 5. EQUIPMENT LIST. The following materials are required for conducting. Standard Test Method for Liquid Limit, and Plasticity Index of Soils. ASTM D LIQUID LIMIT. APPARATUS: 1. Liquid Limit Device: A mechanical device. ASTM D Standard Test Methods for Liquid Limit, Plastic Limit, and Plasticity Index of Soils. ASTM D Edition PDF + Print.
The D Specification for Evaluating, Selecting, and Speci- one-point liquid limit, Method B, uses the data from two trials fying Balances and Scales for Use in Soil, Rock, and at one water content multiplied by a correction factor to Related Construction Materials Testing determine the liquid limit.
E Practice for Conducting an Interlaboratory Study to 4.
Significance and Use 5. The liquid limit, plastic limit, tency of fine-grained soils were defined by Albert Atterberg: and plasticity index of soils are also used extensively, either the upper limit of viscous flow, the liquid limit, the sticky limit, individually or together, with other soil properties to correlate the cohesion limit, the plastic limit, and the shrinkage limit.
In with engineering behavior such as compressibility, hydraulic current engineering usage, the term usually refers only to the conductivity permeability , compactibility, shrink-swell, and liquid limit, plastic limit, and in some references, the shrinkage shear strength.
In addition, the plasticity index and the 3. When sub- the liquid limit is considered to be approximately 2 kPa 0. The amount of increase is 3. Comparison of the liquid limit of a on drying.
Numerically, it is the differ- Practice D NOTE 1The quality of the result produced by this standard is 3. Agencies that meet the criteria of Practice D , generally, are considered capable of competent plasticity index.
Users of this standard are 3. Reliable results depend on many factors; Practice D equivalent diameter smaller than 2 m. D 05 6.
Apparatus cam and follower so that the cup height remains constant over the last 20 to 45 of cam rotation. The device may mm 0. See Fig.
Conduct resilience tests on the finished 6. Details for measuring the resilience hand crank shown in Fig. Such a motor must turn the cam at 6. The results obtained using a motor-driven 6.
Standard Test Methods for Liquid Limit, Plastic Limit, and Plasticity Index of Soils
The preferred cam motion is a uniformly accelerated The design of the tool may vary as long as the essential lift curve. The tool may, but need not, incorporate the gage for adjusting the height-of-drop of the NOTE 2The cam and follower design in Fig. Other cam designs also provide this feature and NOTE 3Prior to the adoption of this test method, a curved grooving may be used.
However, if the cam-follower lift pattern is not known, zero tool was specified as part of the apparatus for performing the liquid limit velocity at drop off can be assured by carefully filing or machining the test.
The curved tool is not considered to be as accurate as the flat tool FIG. D 05 FIG.
However, there are some data which indicate that typically the containers with snug-fitting lids for water content specimens. The GP1 readability of 0.
A porcelain, glass, or plastic dish about Reagents and Materials limit threads. Shrinkage limit[ edit ] The shrinkage limit SL is the water content where further loss of moisture will not result in any more volume reduction.
The shrinkage limit is much less commonly used than the liquid and plastic limits. Plastic limit[ edit ] The Plastic Limit PL is determined by rolling out a thread of the fine portion of a soil on a flat, non-porous surface.
If the soil is at a moisture content where its behavior is plastic, this thread will retain its shape down to a very narrow diameter. The sample can then be remolded and the test repeated. As the moisture content falls due to evaporation, the thread will begin to break apart at larger diameters.
The plastic limit is defined as the moisture content where the thread breaks apart at a diameter of 3. A soil is considered non-plastic if a thread cannot be rolled out down to 3. Liquid limit[ edit ] Casagrande cup in action The liquid limit LL is conceptually defined as the water content at which the behavior of a clayey soil changes from the plastic state to the liquid state.
However, the transition from plastic to liquid behavior is gradual over a range of water contents, and the shear strength of the soil is not actually zero at the liquid limit. The precise definition of the liquid limit is based on standard test procedures described below.
A groove was cut through the pat of clay with a spatula, and the bowl was then struck many times against the palm of one hand. Casagrande subsequently standardized the apparatus and the procedures to make the measurement more repeatable.
Soil is placed into the metal cup Casagrande cup portion of the device and a groove is made down at its center with a standardized tool of 2 millimetres 0.This implicitly combines two separate systems of units; that is, the absolute system and the gravitational system.
However, Practices C , D 75, and D should be used as guides for selecting and preserving samples 3 from various types of sampling operations. If no method is specified, use Method A. Your Prices subject to change without notice.
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