Geotechnical and Materials Engineering Standards for Bridge ...

APPENDIX A - DEFINITIONS FOR AGGREGATES
As the nominal dimensions for U. S. Standard sieves for #4 and a200
sieves are 4.75 mm and 0.075 mm respectively, the sizes indicated in my memo
dated 14 December have been revised accordlnglp. The terms "Mineral Filler"
and "Fknes" have also been deleted. The revised definitions are as follows:
MINERAL: A naturally formed inorganic solid having a definite chemical
composition (includes ice but axclu&s water or mercury).
MINERAL AGGREGATE: An aggregation of sand, gravel, crushed rack, slag or
other material of mineral composition, used in combination with a binding
medium to form bituminous and postland cement concrete, or alone as base
course, filters, or as other construction material.
SAND: The mineral aggregate, smaller than 4.75 mm (#4 US standard sicve
opening) and larger than 0.075 mm (#ZOO US standard sieve opening) in diamctcr
GRAVEL: The mineral agcregaLe, smaller than 75 mm and lar~er than 4.75 rmn in
diameter.
COBRT,E: The mineral aggregate, smaller than 300 mm and larger than 75 m in
diameter .
LARGE BOULDER: The mineral aggregate, larger than 300 nun in diameter.
DEBRIS: Inorganic and/or organic material deposited by the action of gravity
or water. The inorganic material may range in size from boulders several
metres in diameter to smaller size rntneral aggregates ranging from cobbles to
silt and clay sizes, and rhe organic matesial may range from whole trees to
mulch,
SILT, CLAY, MINERAL DUST: Mineral soil particles smaller than 0.075 mm in
dime ter.