Calculation formula of compactness of earthwork subgrade (sand filling method),

Calculation formula of compactness of earthwork subgrade (sand filling method),

It seems that there is still the best answer. I learned this. But I didn't learn it well. I played truant and picked up girls at school. Recently, I have to take the exam to get money. I can't help it. I'll come back to learn again. I hope it will help you. As for the calculation method, set the standard sand density 1.42, compaction standard 2.23