Study on the Mixed Materials Proportion of Stratum Based on the Modelling Experiment

Table 6

Value of control index.

Factors	Proportion of iron and sand in mixture (%)	Quality ratio between iron and sand	Quality ratio between gypsum and lime
Level 1	80	2 : 3	2 : 1
Level 2	85	1.5 : 3.5	1 : 1
Level 3	90	1 : 4	1 : 2