In cases where the work is performed in a room at astm d 63 automatically controlled constant temperature, the water bath is not necessary. The balances, stirring apparatus, hydrometer, sedimentation cylinder, thermometer, sieves, water bath or constant-temperature room, beaker, and timing device used in the method are specified. When the air-dispersion tube is used, it shall be so indicated in the report. When mechanical sieving is used, test the thoroughness of sieving by using the hand method of sieving as described above.
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Vorr When the air-dispersion tube aetm used, it shall be so indicated in the report. Readings shall be taken at the top of the meniscus formed by the suspension around the stem, since it is not possible to secure readings at the bottom of the meniscus. The water for a hydrometer test shall be brought to the temperature that is expected to prevail during the hydrometer test.
Use numerical value of one in both instances in the equation. Replaces D — The mass of air-dried soil selected for purpose of tests, as prescribed in Practice Dshall be sufficient to yield quantities for mechanical analysis as follows: The PDF Download is licensed per individual in which the individual can place on up to four electronic devices for their personal use.
Sieve analysis, hydrometer analysis, and hygroscopic moisture analysis shall be performed on the sample soil. This set consists of the following sieves: It is a number less than one, except when there is no hygroscopic moisture.
Astm d 63 example, if the sedimentation cylinder is to be placed in the water bath, the distilled or demineralized water to be used shall be brought to the astm d 63 of the controlled water bath; or, if the sedimentation cylinder is used in a room with controlled temperature, the water for the asym shall be at the temperature of the room. Bottles containing solutions should have the date of preparation marked on them.
The amount of the inaccuracy increases as the variation from the standard temperature increases. The shaft shall be equipped with a replaceable stirring paddle made of metal, plastic, or hard rubber, as shown in Fig.
Extensive investigations indicate that air-dispersion devices produce a more positive dispersion of plastic soils below the? Allow to soak for at least 16 h. Solutions should be prepared frequently at least once a month or adjusted to pH of 8 or 9 by means of sodium carbonate.
Current edition approved Oct. A special dispersion cup conforming to either of the designs shown in Fig. A superscript epsilon e indicates an editorial change since the last revision or reapproval. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every?
Small variations of temperature do not introduce differences that are of practical signi? D — 63 Reapproved. Do we really need a prescribed pattern? NOTE 4—Another air-type dispersion device, known as a dispersion tube, developed by Chu and Davidson at Iowa Zstm College, has been astk to give results equivalent to those secured by the air-jet dispersion cups.
Any soil remaining in the bottom of the cylinder during the? The balances, stirring apparatus, hydrometer, astm d 63 cylinder, thermometer, sieves, water bath or constant-temperature room, beaker, and timing device used in the method are specified. Users of this f are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. Dispersion of Soil Sample 9.
NOTE 10—The initial air pressure of 1 psi is required to prevent the soil-water mixture from entering the air-jet chamber when the mixture is transferred to the dispersion cup. Plasticity Index Under 5 6 to 20 Over 20 Dispersion Period, min 5 10 15 Soils containing large percentages of mica need be dispersed for only 1 min.
In no case turn or manipulate fragments in the sample through the sieve by hand. This value is the weight W in the equation for percentage remaining in suspension. Transfer the material on the No. The results from the two types of devices differ in magnitude, depending upon soil type, leading to marked differences in particle size distribution, especially for sizes?
NOTE 5—Water may condense in air lines when not in use. For a given hydrometer and sedimentation cylinder, values vary according to the hydrometer readings. NOTE 7—Solutions of this salt, if acidic, slowly revert or hydrolyze back to the orthophosphate form with a resultant decrease in dispersive action. To the mass passing the No. Add distilled or demineralized water, if necessary, so that the total volume in the cup is mL, but no more.
If the controlled water bath is used, the sedimentation cylinder should be placed in the bath between the 2- and 5-min readings. Disperse the soil according to the following schedule: For the remaining sieves, continue the calculations in the same manner. Related Posts
ASTM D 422-63 PDF
Mazurisar Measurement of the composite corrections may be made at two temperatures spanning the range of expected test temperatures, and corrections for the intermediate temperatures calculated assuming a straight-line relationship between the observed values. The fractions smaller than r No. This set consists of the following sieves: The inside diameter shall be such that the mL mark is 36 6 2 cm from the bottom on the inside. Without ascertaining the value of the square root it may be multiplied by K, using either the C- or CI-scale. Nominal Diameter of Largest Particles, in.
Astm D 422 – 63 (Reapproved 2002) pdf free download
Sajin This test method covers the quantitative determination of the distribution of particle sizes in soils. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? If you feel that your comments have not received a fair hearing you should make your views known to ASTM Committee on Standards, at the address shown below. A air gage must be on the line between the cup and the control valve.
ASTM D 422-63 PDF
Vorr When the air-dispersion tube aetm used, it shall be so indicated in the report. Readings shall be taken at the top of the meniscus formed by the suspension around the stem, since it is not possible to secure readings at the bottom of the meniscus. The water for a hydrometer test shall be brought to the temperature that is expected to prevail during the hydrometer test. Use numerical value of one in both instances in the equation.
Sieve analysis, hydrometer analysis, and hygroscopic moisture analysis shall be performed on —63 sample soil. Bring the liquid and the hydrometer to the other temperature to be used, and secure the composite correction as before. Nominal Diameter of Largest Particles, in. Transfer the soil-water slurry from the beaker to the air-jet dispersion cup by washing with distilled or demineralized water. A dispersing agent is used in the aztm, however, and the speci? The distribution of particle sizes larger than 75 micrometers. To obtain the mass passing the No.