On the Pavement of Farm Roads (II)

On the experiment in sand-une, tottori

Abstract

As a result of recent development in the spray irrigation equipment and the farm machineries, agricultural land have been increased in the sand-dune regions and with this, the necessity for good farm road has begun to be realized gradually. Hence the authors constructed test roads in sanddune regions by two different methods, that is the hot-mix asphaltic concrete paved road and the emulsion macadam paved road.
Experiments have been carried out on these test roads by using several farm vehicles (wheel type and crawler type farm tractors, motor truck, etc.).
The following results were obtained from above investigation.
1) Little difference was found between the two test roads regarding the running resistance of farm vehicles.
2) A comparison of the distribution of internal stress in the roadbed under the travelling tractor wheel of the two test roads indicated that the internal stress directly under the tractor wheel of the emulsion macadam paved road was larger than that of the hot-mix asphaltic concrete paved road.
3) Damage to the road surface by truck shoes of tractor was large in case of the emulsion macadam paved road but the damage was small in case of hot-mix asphaltic concrete paved road.