1、Standard Specification for Terms Relating to Subgrade, Soil-Aggregate, and Fill Materials AASHTO Designation: M 146-91 (2012) American Association of State Highway and Transportation Officials 444 North Capitol Street N.W., Suite 249 Washington, D.C. 20001TS-1b M 146-1 AASHTO Standard Specification
2、for Terms Relating to Subgrade, Soil-Aggregate, and Fill Materials AASHTO Designation: M 146-91 (2012) 1. SCOPE 1.1. These definitions cover terms used in descriptions and specifications of materials occurring as or employed in the construction of subgrades, soil-aggregate base and surface courses,
3、and fills. 1.2. The values stated in SI units are to be regarded as the standard. 2. TERMINOLOGY FOR ROCK AND SOIL 2.1. rocknatural solid mineral matter occurring in large masses or fragments. 2.2. soilsediments or other unconsolidated accumulations of solid particles produced by the physical and ch
4、emical disintegration of rocks, and that may or may not contain organic matter. 2.3. broken rockangular fragments of rock that will be retained on a 75-mm (3-in.) sieve. 2.4. cobble (cobblestone)a rock fragment, usually rounded or semirounded, with an average dimension between 75 and 305 mm (3 and 1
5、2 in.). 2.5. bouldera rock fragment, usually rounded by weathering or abrasion, with an average dimension of 305 mm (12 in.) or more. 3. TERMINOLOGY FOR SOIL-AGGREGATE AND ITS COMPONENTS 3.1. soil-aggregate (dense-graded aggregate)natural or prepared mixtures consisting predominately of stone, grave
6、l, or sand and containing silt-clay (minus 75-m (No. 200) material). 3.2. binder (soil binder)portion of soil passing 0.425-mm (No. 40) sieve. 3.3. stonecrushed or naturally angular particles of rock that will pass a 75-mm (3-in.) sieve and be retained on a 2.00-mm (No. 10) sieve. 3.3.1. coarse ston
7、estone passing the 75-mm (3-in.) sieve and retained on the 25.0-mm (1-in.) sieve. 3.3.2. medium stonestone passing the 25.0-mm (1-in.) sieve and retained on the 9.5-mm (3/8-in.) sieve. 3.3.3. fine stonestone passing the 9.5-mm (3/8-in.) sieve and retained on the 2.00-mm (No. 10) sieve. 3.4. gravelro
8、unded particles of rock that will pass a 75-mm (3-in.) sieve and be retained on a 2.00-mm (No. 10) sieve. 2015 by the American Association of State Highway and Transportation Officials.All rights reserved. Duplication is a violation of applicable law.TS-1b M 146-2 AASHTO 3.4.1. coarse gravelgravel p
9、assing the 75-mm (3-in.) sieve and retained on the 25.0-mm (1-in.) sieve. 3.4.2. medium gravelgravel passing the 25.0-mm (1-in.) sieve and retained on the 9.5-mm (3/8-in.) sieve. 3.4.3. fine gravelgravel passing the 9.5-mm (3/8-in.) sieve and retained on the 2.00-mm (No. 10) sieve. 3.5. sandgranular
10、 material resulting from the disintegration, grinding, or crushing of rock and that will pass the 2.00-mm (No. 10) sieve and be retained on the 75-m (No. 200) sieve. 3.5.1. coarse sandsand passing the 2.00-mm (No. 10) sieve and retained on the 0.425-mm (No. 40) sieve. 3.5.2. fine sandsand passing th
11、e 0.425-mm (No. 40) sieve and retained on the 75-m (No. 200) sieve. 3.6. silt-clay (minus 75-m (No. 200) material)fine soil particles that will pass the 75-m (No. 200) sieve. 3.6.1. silt fractionmaterial passing the 75-m (No. 200) sieve and larger than 0.002 mm. 3.6.2. clay fractionmaterial smaller
12、than 0.002 mm. 3.6.3. colloidsmaterial smaller than 0.001 mm. 4. TERMINOLOGY FOR PAVEMENT SUBSTRUCTURE COMPONENTS 4.1. embankment foundationthe material on which an embankment is placed. 4.2. embankment (fill)a raised structure of soil, soil-aggregate, or rock. 4.3. subgrade (basement soil)the prepa
13、red and compacted soil immediately below the pavement system and extending to such depth as will affect the structural design. 4.4. subbasethe layer used in the pavement system between the subgrade and the base course. 4.5. basethe layer used in a pavement system to reinforce and protect the subgrade or subbase. 2015 by the American Association of State Highway and Transportation Officials.All rights reserved. Duplication is a violation of applicable law.
