土质.集料土经受水作用的稳定性试验

[中文适用范围]： 本国际标准规定了土壤团聚体稳定性测量的处理方法。 它可应用于主要来自耕种土壤的各种材料。 然而，它也适用于任何土壤剖面，无论是否耕种。 测量的骨料尺寸范围为 3 毫米至 5 毫米。 然而，2 毫米至 5 毫米部分中砾石的存在可能会扭曲结果。 如果砾石的百分比在 10% 到 40% 之间，则应清洗测试中获得的大于 2 mm 的砾石部分，并计算有和没有砾石的平均加权直径（MWD，见 6.1）。 如果砾石的百分比> 40%，则结构稳定性测试不显着。 该方法不适用于非结构化材料，因为它们没有足够的内聚力来形成毫米级聚集体。 [外文原描述]： This International Standard specifies the treatments for the measurement of the stability of soil aggregates. It can be applied to a wide range of materials originating mainly from the tilled horizons of cultivated soils. It can, however, also apply to any soil profile horizon, whether it is cultivated or not. Aggregates ranging from 3 mm to 5 mm are measured. However, the presence of gravel in the 2 mm to 5 mm fraction can distort the results. If the percentage of gravel is between 10 % and 40 %, the > 2 mm fraction of the gravel obtained from the tests should be washed and a mean weighted diameter (MWD, see 6.1) calculated with and without gravel. If the percentage of gravel is > 40 %, the structural stability tests are not significant. The method does not apply to unstructured materials, as they are not sufficiently cohesive to form millimetric aggregates.