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我国现行的液限标准与多数国家的液限标准相比,液限时土的强度偏高,因而需制定新的标准。本文根据对比试验成果,结合我国实际,提出将76g锥(锥角30°)5s时下沉深度17mm含水量定为液限;同时保留76g锥10mm含水量供过渡需要。当采用液塑限联合试验时,对于除低液限土及红粘土等一些特殊土外的细粒土,将76g锥5s时下沉深度2mm含水量定为塑限,可以与搓滚塑限相一致。
Compared with the liquid limit standards in most countries, the current liquid limit standards in China have a relatively high strength at the time of liquid limit, and new standards need to be formulated. Based on the results of comparative experiments and in combination with China's actual conditions, this paper proposes that the water depth of 17mm sinking depth of 76mm (cone angle 30°) for 5s is set as the liquid limit; while the water content of 76mm cone is retained for the transition needs. When the combined liquid-plastic limit test is adopted, for some fine-grained soils except for special liquids such as low liquid limit soil and red clay, the depth of sinking depth of 2mm at 76g cones for 5s is set as the plastic limit, which can be compared with the rotomolding limit. Consistent.