SCOPE
1.1
Purpose
The scope of work for this specification includes preparing sub grade, placing of granular sub-base courses,
granular
base courses, dense bituminous macadam binders
and
bituminous concrete for the access
and
plant roads, as well as the requirements for granular base and concrete roads.
In
cases where more than one code,
regulation, specification
and standard apply to
the same condition,
the most stringent
shall be followed. In the event of a conflict between this
specification and other specifications or correspondence, the COMPANY shall be consulted and a ruling, in writing, shall be obtained before any work is started.
1.2 Standards
1.2.1 All materials, equipment and workmanship shall be governed by, but not limited to, the latest version of the following standards.
1.3 International Standards
a. ASTM D698 Standard Test Methods for Laboratory Compaction Characteristics of Soil Using Standard Effort (12,400 fft-lbf/ft3 (600 kN-m/m3)
b. ASTM D1556 Standard Test Method for
Density and the Unit Weight of Soil in place by the Sand Cone Method
c.
ASTM D1557 Standard Test Methods for Laboratory Compaction Characteristics of Soil Using Modified Effort (56,000 ft-lbf/ft3
(2,700 kN-m/m3))
1.4 Indian Standards
a. IS-73
b. IS-217
c. IS-456
d. IS-1201-IS-1220
e. IS-3117
Specification for
Paving Bitumen
Specification for
Cutback Bitumen
Plain and Reinforced Concrete Code of Practice
Method for
Testing Tar
and Bituminous
Materials
Bitumen Emulsion for Roads and Allied Applications (Anionic
Type)
f. IS-8887 Bitumen Emulsion for Roads
(Cationic Type)
g. IRC Indian
Roads Congress Standard Specifications:
i. IRC: 15-2002 Standard Specifications and code of practice for Construction of concrete
roads (Third revision).
ii. IRC: 29-1988 Specification for Bituminous concrete (Asphaltic Concrete) for road pavement
(First
Revision).
iii. IRC: 36-2010 Recommended
practice for construction of earth Embankments
and Sub-Grade for
road works (First
Revision).
iv. IRC: 11-1984 Handbook of Quality control for construction of roads and runways (second Revision).
v. IRC: 53-2010 Guidelines
on use
modified
bitumen
in road construction
(Second Revision).
1.5 Definitions
COMPANY: The COMPANY means Cairn Energy Pty Limited, and its subsidiaries or authorized representatives.
CONTRACTOR: Person(s), company, firm, manufacturers, fabricator or vendor.
2.0 EXAMINATION
The
site shall be examined
for work that might affect the construction of the
road. Particular attention shall be paid to underground cables, pipes, manholes and roadside drains etc.
3.0 MATERIALS
3.1 Sub-Base Course Materials
3.1.1 The sub-base course materials shall be hard, durable and clean granular materials such as sand, or
approved granular material and, shall be free of organic material, clay balls and other deleterious
substances.
3.1.2 The sub-base
material shall be well graded and shall conform to following gradation limits; or approved
equal:
|
JOB MIX FORMULA |
||||||||
|
SIEVE ANALYSIS
FOR GSB GRADUTION
FIXING |
||||||||
|
SIEVE SIZE (MM) |
75 |
53 |
26.5 |
9.5 |
4.75 |
2.36 |
0.425 |
0.075 |
|
40-60MM |
100 |
68.4 |
41.2 |
5.2 |
|
|
|
|
|
10 MM |
100 |
100 |
100 |
82.3 |
21.6 |
2.6 |
0.66 |
0.5 |
|
STONE DUST |
100 |
100 |
100 |
100 |
100 |
99.64 |
62.8 |
12.1 |
|
40% OF 40-60 MM |
40 |
27.36 |
16.48 |
2.08 |
0 |
0 |
0 |
0 |
|
25% OF 10(12) MM |
25 |
25 |
25 |
20.58 |
5.4 |
0.65 |
0.165 |
0.125 |
|
35% OF STONE DUST |
35 |
35 |
35 |
35 |
35 |
34.874 |
21.98 |
4.235 |
|
RESULTANT GRADING |
100 |
87.36 |
76.48 |
57.66 |
40.4 |
35.524 |
22.145 |
4.36 |
|
REQUIRED RANGE |
100 |
80-100 |
55-99 |
35-65 |
25-55 |
20-40 |
10-25 |
3-10 |
|
MID RANGE |
100 |
90 |
77 |
40 |
40 |
30 |
17.5 |
6.5 |
3.2 Wet Mix Macadam Road Base
3.2.1 The road
base to be placed on top of the granular sub-base shall comprise wet mix macadam material laid
to the specified thickness for width, line and levels shown on the drawings. The materials shall be crushed rock, hard durable particles or fragments of rock crushed
to the correct sizes, well graded and shall have a
grading conform to the following gradation limits or approved equal:
0 Comments: