干拓地土壌の物理的性質とその改良法に関する研究(第3報) : 土壌の緊硬限界及び緊硬度の測定法に関する一考察(I) ATTERBERG の緊硬限界について
1956 年 26 巻 12 号 p. 485-488
詳細
1956 年 26 巻 12 号 p. 485-488
Experiments were made with heavy clay polder soils to establish the methods for determining the moisture contents corresponding to their plastic limit or liquid limit. To find the plastic limit, the soil was molded into small cylindrical briquette; and the strength crushing this briquette was measured. The Experiment was repeated at several amounts of moisture, which was changed decreasingly until the briquett began to cracks and fell to pieces. The liquid limit was determined by the CASAGRANDE'S liquid limit device. The results obtained with standard soil, CaSO_4-and Krilium-treated soil and pastured soil showed that the afore-mentioned methods seem to offer the useful means for characterizing the soil tilth.
