The authors studied for ten years with the research on granular soil which have needed strength and stability due to add fixing agent into the soil. The main purposes of this research are (1) prevent the growth of soil dust, (2) construct the pervious ground, (3) effective utilization for sludge from the filter plant.
The results from basic research were clearly found that there are suitable water content to granulate soils and those granulation of soils are able to be utilized as materials of construction.