( Actual Program is included in Super Civil CD )
20 mm respectively.
| DESIGN
OF RC RIGID PAVEMENT AS PER I R C : 58. ( Actual Program is included in Super Civil CD ) |
|
| PROGRAM INFO / LIMITATIONS. | |
| |
This program designs RC rigid pavement as per given loading . |
| |
f y ( characteristic strength of reinforcement ) = 415 N / mm2 . |
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Tie bars are
required only if user wants to tie the adjacent lane, in anticipation of
heavy traffic, expansive sub grade etc .The spacing & diameter
of tie bars shall not exceed 750 mm & 20 mm respectively. |
| |
Dowel bars are designed for 40 % of load transfer. |
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Clear cover to nominal bars from top shall be 50 mm. |
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Some useful info are as under. |
| Approximate
Modulus of Sub Grade Reaction (Kg/cm3) {K value} corresponding to CBR values. |
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|
C
B R %
|
2 | 3 | 4 | 5 | 7 | 10 | 20 | 50 | 100 |
| K VALUE | 2.08 | 2.77 | 3.46 | 4.16 | 4.84 | 5.54 | 6.92 | 13.85 | 22.16 |
|
Recommended
temperature differentials in concrete roads
|
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|
zone
|
states
|
Temp.differentials
in degree C. in slabs of thickness (mm)
|
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|
100
|
150
|
200
|
250
|
300
|
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|
1
|
Punjab,
UP, Rajasthan, Gujarat,Haryana & north MP { * }
|
10.2
|
12.5
|
13.1
|
14.3
|
15.8
|
|
2
|
Bihar,
Bengal, Assam & eastern Orrisa { * }
|
14.4
|
15.6
|
16.4
|
16.6
|
16.8
|
|
3
|
Maharashtra,
Karnataka, South MP, Andra, Western Orissa & North Chennai { * }
|
14.75
|
17.3
|
19
|
20.3
|
21
|
|
4
|
Kerala
& South Chennai
{ * } |
13.2
|
15
|
16.4
|
17.6
|
18.1
|
|
5
|
Coastal
Areas Bounded by Hills
|
12.8
|
14.6
|
15.8
|
16.2
|
17
|
|
6
|
Coastal
Areas Un Bounded by Hills
|
13.6
|
15.5
|
17
|
19
|
19.2
|
|
{
* } : Excluding hilly regions & coastal areas.
|
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|
Temperature differentials represents difference in temperature between top
& bottom surface of pavement. |
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