What is the mix ratio for mud-bound macadam pavement?
2 Answers
Common mix ratios for lime; soil; stone include 10:40:50; 10:60:30; 12:58:30, etc. When used as heavy-duty passages, especially in areas with steep slopes or heavy rainfall in southern regions, cement or lime is generally added for gradation improvement. Below is extended information: Mix ratio testing: Cement-stabilized macadam structure serves as the base material for semi-rigid pavements. It forms strength rapidly with strong compaction and integral performance, excellent water stability, minimal seasonal impact, and increasing strength over time, thus demonstrating excellent pavement performance.
The mix ratio for clay-bound gravel roads is quite particular, typically using 3 to 5 parts gravel to 1 part clay. It's best to use a mix of gravel sizes, combining egg-sized stones with smaller pebbles to fill the gaps. The clay should be of good viscosity, mixed with water to a paste-like consistency that can stick to a shovel. Remember to stir it evenly, like mixing cement mortar, ensuring every gravel piece is coated with the clay slurry. A crucial step is to compact it and then water-cure it, allowing the clay to gradually harden and bind. I used this method when paving the grain-drying yard in my hometown, and even on sunny days, vehicles passing over it wouldn't raise dust.
