Unload and store the materials with a minimum of handling.
Store
aggregates preventing segregation and contamination.
PART 2
PRODUCTS
2.1
MATERIALS
**************************************************************************
NOTE: Delete designations, materials, grades, and
aggregate sizes which are not available or desirable
for the project. In selecting alternate materials,
consider the cost effect of competition between
materials along with engineering considerations.
**************************************************************************
Mineral aggregate and bituminous material of the following types,
gradations, grades, and consistencies that meet the requirements of
stripping, wear, and soundness tests as specified in paragraph SAMPLING AND
TESTING shall be used.
2.1.1
Mineral Aggregate
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NOTE: The desired gradations to be used for the
project will be specified. For single surface
treatment, select the required gradation from the
table for single bituminous surface treatment. For
double surface treatment, select the required
gradations (either No. 1 and No. 2 or No. 3 and No.
4) from the table for double bituminous surface
treatment.
**************************************************************************
The aggregate shall consist of crushed stone, crushed gravel, or crushed
slag and shall be of such nature that thorough coating of bituminous
material used in the work will not strip off upon contact with water.
Moisture content of the aggregate shall be such that the aggregate will be
readily coated with the bituminous material. Drying may be required, as
directed. Aggregate shall conform to the gradation shown below. Gradation
of the aggregates shall be determined by ASTM C 136.
AGGREGATE GRADATION
SINGLE BITUMINOUS SURFACE TREATMENT
(PERCENT BY WEIGHT PASSING)
Sieve Designation
No. 1
No. 2
No. 3
_________________
_____
_____
_____
25.0 mm
100
--
--
19.0 mm
90-100
100
--
12.5 mm
20-55
90-100
100
9.5 mm
0-15
40-70
85-100
4.75 mm
0-5
0-15
10-30
2.36 mm
--
0-5
0-10
1.18 mm
--
--
0-5
SECTION 02745
Page 11
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