| 摘要 |
PROBLEM TO BE SOLVED: To obtain a process for producing carbonaceous granular materials for soil improvement having a low density and water absorption performance of a high degree and having excellent granular strength and granular characteristic in combination. SOLUTION: Org. short fibers having a diameter of <=0.1mm and length of <=100mm are rolled and granulated together with fibrillated fibers of 5 to 20 pts.wt. per 100 pts.wt. org. short fibers and 20 to 60 pts.wt. org. binder and after the granules are dried, the granules are subjected to a firing carbonization treatment by a temp. range of >=500 deg.C in a nonoxidizing atmosphere. The org. short fibers are used by being selected from wood pulp fibers, cotton pulp fibers or rayon fibers. The fibrillated fibers are preferably formed by subjecting wood pulp, cotton, jute, polyvinyl alcohol-based fibers, rayon or aramid fibers to a beating treatment. |
