2 the soil is course grained if it contains less than 50 % fines . follow the procedures for identifying coarse - grained soils of section 15 1如果土包含50 %或更多的细粒,它就是细粒土.按照14部分中的程序来鉴别细粒土
2.
2 identify the soil as a poorly graded gravel , gp , or as a poorly graded , sand , sp , if it consists predominantly of one size ( uniformly graded ) , or it has a wide range of sizes with some intermediate sizes obviously missing ( gap or skip graded ) 2如果土包含一个主要的粒径(均匀的级配) ,或者有一个很宽的,一些中间粒径明显缺失的范围(间隙或跳跃的级配)
