Contact [_____] at [_____] to arrange for review of the memorandum. 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 of processing required.
2.1.2.2
Fine-Aggregate Grading
The grading and uniformity of the fine aggregate shall conform to the
following requirements as delivered to the grout mixer:
U. S. STANDARD SIEVE SIZE
PERCENT BY MASS, PASSING
2.36
mm
(No.
8)
100
1.18
mm
(No.
16)
95 - 100
600
m
(No.
30)
55 - 80
300
m
(No.
50)
30 - 55
150
m
(No.
100)
10 - 30
75
m
(No.
200)
0 - 10
In addition to the grading limits specified above, the fine aggregate shall
have a fineness modulus of not less than 1.30 nor more than 2.10. The
grading of the fine aggregate shall also be controlled so that the fineness
moduli of at least four of any five consecutive test samples shall not vary
more than 0.15 from the average fineness modulus of all samples previously
taken.
2.1.2.3
Coarse-Aggregate Grading
The grading of the coarse aggregate shall conform to the following
requirements:
PERCENT BY MASS, PASSING
19.0 mm (3/4 in.)
37.5 mm (1-1/2 in.)
U. S. STANDARD
to
to
SIEVE SIZE
37.5 mm (1-1/2 in.)
75 mm (3 in.)
75
mm
(3 in.)
95
-
100
50
mm
(2 in.)
100
20
-
55
37.5
mm
(1-1/2 in.)
95 - 100
0
-
5
25.0
mm
(1 in.)
40 - 80
0
-
2
19.0
mm
(3/4 in.)
20 - 45
12.5
mm
(1/2 in.)
0-5
9.5
mm
(3/8 in.)
0-2
2.1.2.4
Coarse-Aggregate Particle Shape
The quantity of flat and elongated particles of the coarse aggregate, as
defined and determined by ASTM D 4791, shall not exceed 25 percent.
2.1.2.5
Concrete Aggregate Sources
**************************************************************************
NOTE: If an aggregate source is provided by the
Government, the appropriate paragraphs from
UFGS-03700 MASS CONCRETE should be used.
**************************************************************************
a.
List of Sources - The concrete aggregates sources may be selected
SECTION 03372
Page 16
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