What is the specification for the mix ratio of mud-bound gravel pavement?
2 Answers
Common mix ratios for lime, soil, and gravel include 10:40:50; 10:60:30; 12:58:30, etc. When used as a heavy-duty passage, considering factors such as steep slopes or regions with heavy rainfall in the south, cement or lime is generally added to improve the gradation. Below is additional information: Cement-stabilized gravel mix ratio inspection: Cement-stabilized gravel is a foundational material for semi-rigid pavement. It develops strength quickly, has strong consolidation and overall performance, excellent water stability, is minimally affected by seasons, and its strength increases over time, thus offering good road performance.
I used to work in road construction for a while. The key specification for mud-bound macadam road surfacing lies in the ratio of mud to crushed stone, generally kept between 1:4 and 1:6 for reliability—meaning 1 part mud to 4-6 parts crushed stone. The mud should be made by mixing clay with a small amount of water into a paste-like consistency, neither too thin nor too thick, otherwise the road surface is prone to cracking or water pooling. The crushed stone particles should ideally be uniform, with sizes not exceeding 20mm, or else the surface won’t lay flat. During actual construction, weather and local conditions must also be considered—for example, adding anti-slip materials during the rainy season. I’ve seen plenty on construction sites—deviating from the ratio leads to wheel slippage or severe bumpiness, affecting driving stability. Anyone who’s driven on such roads can attest that standardized ratios directly impact durability and safety.
