Water Bound Macadam: Learn its Construction, Materials, Maintenance & Advantages
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Water Bound Macadam FAQs
What is the difference between WMM and WBM?
Materials used in the WBM are the stone aggregates, screenings and binder material (Stone dust with water), while in WMM materials used are only stone aggregates and binders. Quantity of the WBM is generally measured in cubic metres, while that of the WMM is in square metres
What is the thickness of WBM?
The WBM Course shall be constructed in layers such that the thickness of each compacted layer is not more than 100 mm for grading 1. The compacted thickness of layer shall be 75 mm for grading 2 and grading 3.
What is the minimum width of WBM road?
The width of the water bound macadam road depends upon several factors like topography, traffic, weather considerations etc.
Which material is used in WBM road?
Stone crushed aggregates, screening materials and binders are overlaid one after the other in the construction of water bound macadam.
What are the major problems in WBM roads?
Major problems are occur in WBM roads are as follows; Alligator Cracking Consolidation of pavement layers Shear failure Longitudinal cracking Frost Heaving Lack of binding to lowers course Reflection crushing Formation of waves and corrugation