Page 236 - RoadCem Manual - PCT BV

EXAMPLE 1. TRADITIONAL CONSTRUCTION CONSTRUCTION
􏰁 190 mm asphalt.
􏰁 500 mm sand cement stabilization
􏰁 Sand.
Asphalt with modified bitumen’s Sand cement stabilization
Sand
Figure B.6.1 Traditional construction.
CALCULATION
BISAR was used to calculate the strains are calculated within the design pavement structure and a given loading scenario. When the layers are thinner than the thicknesses given in figure B 6.1 than the CDF factor will be higher than 1 and the construction is not strong enough to have a life span of 20 years.
Wheel load kN
Strain
AGV %
Ni
ni
Damage factor Ni/ni
μm/m
275 89 0,1 444 270 88 0,1 444 265 86 0,1 444 260 85 0,3 1333 255 83 0 0 250 82 1,5 6667 245 80 2,4 10667 240 79 5 22222 235 78 8,1 36000 230 76 9,9 44000 225 75 7,1 31556 220 73 6,3 28000 215 72 5,1 22667 210 70 5 22222 205 69 2,8 12444 200 67 2,8 12444 195 66 2,4 10667 190 64 2,3 10222 185 63 2,4 10667 180 61 3,2 14222 175 59 2,3 10222 170 58 2,2 9778 165 56 1,8 8000 160 55 1,7 7556 155 53 1 4444 150 52 1,1 4889 145 50 1 4444 140 48 22 97778
56624
71992
91532
116374
147960
188117
239174
304089
386621
491554
624967
794590
1010249
1284441
1633052
2132492
2784678
3636323
4748430
6200654
8097016
10573347
13807021
18029658
23543715
30744151
40146714
52424887
0,008 0,006 0,005 0,011 0,000 0,035 0,045 0,073 0,093 0,090 0,050 0,035 0,022 0,017 0,008 0,006 0,004 0,003 0,002 0,002 0,001 0,001 0,001 0,000 0,000 0,000 0,000 0,002 0,000 0,000 0,000
0,522
135 47 0 130 45 0 125 43,6 0
Cumulative Damage Factor, (Sum)
The CDF factor < 1, so this construction is feasible.
0 68458125 0 89394850 0 116734708
236
260
500 190