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在级配砾(碎)石路面施工中,对细壤的控制有两个方面:1.要求细壤在混合料中所占百分数符合最佳级配的规定;2.细壤应具有符合规定的塑指。如果混合料中的细壤不完全符合这两方面的规定,都可能使铺筑的路面发生松散、松软或泥泞现象。通常控制细壤的级配和塑指的方法是采用下列的三元联立方程式:
In the graded gravel (broken) stone pavement construction, the control of the fine soil has two aspects: 1. Require the percentage of fine soil in the mixture in line with the provisions of the best grading; 2. Fine soil should have to comply with the provisions The plastic means. If the mixture of fine soil does not fully meet the requirements of these two aspects, may pave the road pavement loose, soft or muddy phenomenon. The usual method of controlling the grading and plastic indexing of a fine soil is to use the following ternary simultaneous equations: