2.1.3
Open-Graded Mix Aggregate
The gradations in Table I represent the limits which shall determine the
suitability of open-graded mix aggregate for use from the sources of
supply. The aggregate, as finally selected, shall have a gradation within
the limits designated in Table I and shall not vary from the low limit on
one sieve to the high limit on the adjacent sieve, or vice versa, but shall
be uniformly graded from coarse to fine.
TABLE I
OPEN-GRADED MIX AGGREGATE
Sieve Size
Percent by Weight Passing
---------------------------------------------------------
19
mm
100
12.5
mm
54-76
9.5
mm
38-60
4.75
mm
10-20
2.36
mm
8-16
0.60
mm
4-10
0.075
mm
1-3
TABLE I
OPEN GRADED MIX AGGREGATE
Sieve Size
Percent by Weight Passing
---------------------------------------------------------
3/4
in.
100
1/2
in.
54-76
3/8
in.
38-60
No.
4
10-20
No.
8
8-16
No.
30
4-10
No.
200
1-3
Table I is based on aggregates of uniform specific gravity; the percent
passing various sieves may be changed by the Contracting Officer when
aggregates of varying specific gravities are used. Adjustments of
percentages passing various sieves may be directed by the Contracting
Officer when aggregates vary more than 0.2 in specific gravity.
2.1.4
Slurry Grout Sand
Slurry grout sand shall consist of clean, sound, durable, particles of
processed silica sand that meet the requirements for wear and soundness
specified for coarse aggregate. The sand shall contain no clay, silt, or
other objectionable matter. The gradations in Table II represent the
limits which shall determine the suitability of silica sand for use from
the sources of supply.
SECTION 02746
Page 11
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