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AASHTO T 272
Standard Method of Test for Family of Curves—One Point Method
Year: 2010
Abstract: These methods of tests are for the rapid determination of the maximum density and optimum moisture content of a soil sample utilizing a family of curves and a one-point determination.
One-point determinations are made by compacting the soil in a mold of a given size with a 2.5-kg (5.5-lb) rammer dropped from a height of 305 mm (12 in.). Four alternate procedures are provided as follows:
• Method A—A 101.6-mm (4-in.) mold; soil material passing a 4.75-mm (No. 4) sieve. Sections 5 and 6.
• Method B—A 152.4-mm (6-in.) mold; soil material passing a 4.75-mm (No. 4) sieve. Sections 7 and 8.
• Method C—A 101.6-mm (4-in.) mold; soil material passing a 19.0-mm (3/4 in.) sieve. Sections 9 and 10.
• Method D—A 152.4-mm (6-in.) mold; soil material passing a 19.0-mm (3/4 in.) sieve. Sections 11 and 12.
The methods described herein correspond to the methods in T 99 and must be chosen accordingly; that is, when moisture-density relationships as determined by Method C of T 99 are used to form the family of curves, then Method C described in this procedure must be used for the one-point determination (Note 1).
Note 1—Direct reference to T 99 is made throughout these test methods, and most terminology, apparatus, and procedures are the same.
In addition, the concepts described herein are applicable to one-point determinations and moisture-density relationships as specified in T 180, with appropriate apparatus and method used as required.
The following applies to all specified limits in this standard: For the purposes of determining conformance with these specifications, an observed value or a calculated value shall be rounded off "to the nearest unit" in the last right-hand place of figures used in expressing the limiting value, in accordance with the rounding-off method of ASTM E 29.
The values stated in SI units are to be regarded as the standard.
One-point determinations are made by compacting the soil in a mold of a given size with a 2.5-kg (5.5-lb) rammer dropped from a height of 305 mm (12 in.). Four alternate procedures are provided as follows:
• Method A—A 101.6-mm (4-in.) mold; soil material passing a 4.75-mm (No. 4) sieve. Sections 5 and 6.
• Method B—A 152.4-mm (6-in.) mold; soil material passing a 4.75-mm (No. 4) sieve. Sections 7 and 8.
• Method C—A 101.6-mm (4-in.) mold; soil material passing a 19.0-mm (3/4 in.) sieve. Sections 9 and 10.
• Method D—A 152.4-mm (6-in.) mold; soil material passing a 19.0-mm (3/4 in.) sieve. Sections 11 and 12.
The methods described herein correspond to the methods in T 99 and must be chosen accordingly; that is, when moisture-density relationships as determined by Method C of T 99 are used to form the family of curves, then Method C described in this procedure must be used for the one-point determination (Note 1).
Note 1—Direct reference to T 99 is made throughout these test methods, and most terminology, apparatus, and procedures are the same.
In addition, the concepts described herein are applicable to one-point determinations and moisture-density relationships as specified in T 180, with appropriate apparatus and method used as required.
The following applies to all specified limits in this standard: For the purposes of determining conformance with these specifications, an observed value or a calculated value shall be rounded off "to the nearest unit" in the last right-hand place of figures used in expressing the limiting value, in accordance with the rounding-off method of ASTM E 29.
The values stated in SI units are to be regarded as the standard.
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| contributor author | AASHTO - American Association of State Highway and Transportation Officials | |
| date accessioned | 2017-09-04T18:43:02Z | |
| date available | 2017-09-04T18:43:02Z | |
| date copyright | 01/01/2010 | |
| date issued | 2010 | |
| identifier other | KAVAADAAAAAAAAAA.pdf | |
| identifier uri | http://mapnamagz.yabesh.ir/std;query=autho4A5893/handle/yse/224437 | |
| description abstract | These methods of tests are for the rapid determination of the maximum density and optimum moisture content of a soil sample utilizing a family of curves and a one-point determination. One-point determinations are made by compacting the soil in a mold of a given size with a 2.5-kg (5.5-lb) rammer dropped from a height of 305 mm (12 in.). Four alternate procedures are provided as follows: • Method A—A 101.6-mm (4-in.) mold; soil material passing a 4.75-mm (No. 4) sieve. Sections 5 and 6. • Method B—A 152.4-mm (6-in.) mold; soil material passing a 4.75-mm (No. 4) sieve. Sections 7 and 8. • Method C—A 101.6-mm (4-in.) mold; soil material passing a 19.0-mm (3/4 in.) sieve. Sections 9 and 10. • Method D—A 152.4-mm (6-in.) mold; soil material passing a 19.0-mm (3/4 in.) sieve. Sections 11 and 12. The methods described herein correspond to the methods in T 99 and must be chosen accordingly; that is, when moisture-density relationships as determined by Method C of T 99 are used to form the family of curves, then Method C described in this procedure must be used for the one-point determination (Note 1). Note 1—Direct reference to T 99 is made throughout these test methods, and most terminology, apparatus, and procedures are the same. In addition, the concepts described herein are applicable to one-point determinations and moisture-density relationships as specified in T 180, with appropriate apparatus and method used as required. The following applies to all specified limits in this standard: For the purposes of determining conformance with these specifications, an observed value or a calculated value shall be rounded off "to the nearest unit" in the last right-hand place of figures used in expressing the limiting value, in accordance with the rounding-off method of ASTM E 29. The values stated in SI units are to be regarded as the standard. | |
| language | English | |
| title | AASHTO T 272 | num |
| title | Standard Method of Test for Family of Curves—One Point Method | en |
| type | standard | |
| page | 7 | |
| status | Active | |
| tree | AASHTO - American Association of State Highway and Transportation Officials:;2010 | |
| contenttype | fulltext |