Question

In Water Bound Macadam (WBM) roads, binding
material used is:
(1) Sand (2) Stone dust
(3) Cement (4) Brick dust

Answer 1

stone dust is the ans

Answer 2

In Water Bound Macadam (WBM) roads, the binding material used is stone dust. (option 2)

• WBM is the process of layering roads from the broken stones, all the broken stones are aggregated and layered on the roads.
• There is layering done with stone dust as it acts as binding material and keeps the layer intact for long days.
• On the layer, there is the application of water during the construction, and further, it is leveled and smoothened by the use of a sliding wheel roller on it.