PERCENT BY MASS PASSING INDIVIDUAL SIEVES
4.75 mm (No. 4)
19.0 mm (3/4 in.) 37.5 mm (1-1/2 in.)
U.S. STANDARD
to
to
to
SIEVE SIZE
19.0 mm (3/4 in.) 37.5 mm (1-/2 in.)
75 mm (3 in.)
100 mm (4 in.)
100
75 mm (3 in.)
90 - 100
50 mm (2 in.)
100
20 - 55
37.5 mm (1-1/2 in.)
90 - 100
0 - 10
25 mm (1 in.)
100
20 - 45
0-
5
19.0 mm (3/4 in.)
90 - 100
0 - 10
9.5 mm (3/8 in.)
20 - 55
0-
5
4.75 mm (No 4)
0 - 10
2.36 mm (No. 8)
0-
5
2.1.4.4
Particle Shape
The shape of the particles of the fine aggregate and of the coarse
aggregate shall be generally spherical or cubical. The quantity of flat
and elongated particles at a length-to-width or width-to-thickness ratio
greater than 3 in the separated size groups of coarse aggregate, as defined
and determined by ASTM D 4791, shall not exceed 25 percent in any size
group.
2.1.4.5
Moisture Content
The fine aggregate shall not be placed in bins at the batch plant until it
is in a stable state of moisture content. A stable moisture content shall
be reached when the variation in the percent of total moisture tested in
accordance with ASTM C 566 and when sampled at the same location will not
be more than 0.5 percent during one (1) hour of the two (2) hours prior to
placing the material in the batch plant bins and the variation in moisture
content when sampled at the same location shall not be more than 2.0
percent during the last 8-hour period that the aggregate remains in the
stockpile. The coarse aggregate shall be delivered to the mixers with the
least amount of free moisture and the least variation in free moisture
practicable under the job conditions. Under no conditions shall the coarse
aggregate be delivered to the mixer "dripping wet."
2.1.4.6
[Commercial Concrete Aggregate Sources
**************************************************************************
NOTE: The list of sources and required tests will
be taken from the concrete materials DM.
**************************************************************************
Concrete aggregates may be furnished from any source capable of meeting the
quality requirements stated in paragraph QUALITY. The following sources
were evaluated during the design phase of the project in [19___] and were
found at that time capable of meeting the quality requirements when
suitably processed. No guarantee is given or implied that any of the
following listed sources are currently capable of producing aggregates that
meet the required quality stated in paragraph QUALITY. A DM containing the
results of the Government investigation and test results is available for
review in the [_____] District Office. Contact [_____] at [_____] to
arrange for review of the DM. The test results and conclusions shall be
considered valid only for the sample tested and shall not be taken as an
indication of the quality of all material from a source nor for the amount
SECTION 03701
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