particular specifications (road works) - CIDCO Maharashtra Ltd.

CIDCO OF MAHARASHTRA LTD
C.A.No.01/CIDCO/SE(KHR)/EE(KHR-I)/2010–11 Pg. No. 304
11.2.5 Aggregate grading and binder content:
When tested in accordance with IS: 2386 Part 1 (Wet grading method),
the combined grading of the coarse and fine aggregates and added
filler shall fall within the limits shown in Table 500-18 of M.O.R.T. & H.
Specifications (Fourth Revision), for gradings 1 or 2 as specified in the
contract.
TABLE 500-18
COMPOSITION OF BITUMINOUS CONCRETE PAVEMENT LAYERS
Grading 1 2
Nominal aggregate size 19mm 13mm
Layer Thickness 50-65mm 30-45mm
IS Sieve1 (mm) Cumulative % by weight of total aggregate passing
45 - -
37.5 - -
26.5 100 -
19 79-100 100
13.2 59-79 79-100
9.5 52-72 70-88
4.75 35-55 53-71
2.36 28-44 42-58
1.18 20-34 34-48
0.6 15-27 26-38
0.3 10-20 18-28
0.15 5-13 12-20
0.075 2-8 4-10
Bitumen content % by
mass of total mix2 5.0-6.0 5.0-7.0
Bitumen grade (pen) 60/70 60/70
Notes: 1) The combined aggregate grading shall not vary from the low limit
on one sieve to the high limit on the adjacent sieve.
2) Determined by the Marshall method.