Also known as Treated RAP

• Residual Bitumen (BE or FB) ≤ 3% and Cement ≤ 1% by mass of dry aggregate
• Residual Bitumen (BE or FB):Cement > 1
• If Residual Bitumen (BE or FB):Cement < 1, then mix is considered as cement treated material.

Behaviour of BSM

• Behaves like unbound granular material
• “Non-continuous” binding
• Acquire flexural strength
• Reduced moisture susceptibility
• Less susceptible to temperature
• Improves durability
• Increased cohesive strength
• Primary mode of failure is permanent deformation

Benefit of Bitumen Stabilized Material?

• Alternative replacement of high-quality materials in the upper pavement 
• Process is environmental friendly 
• Cost and time saving technique 
• Wide range of distress types can be effectively rehabilitated
• Traffic disruption and time delays are minimized
• Can be trafficked soon after compaction

Treated RAP (BSM): The Process

Option 1: In-situ with WR240

• Transport 10-20% Fresh Material and prepare bed using Grader in-situ
• Dose Cement with Cement Spreader
• Pass the WR240 Stabilizer
• Grade, Roll and Compact
• Treated RAP (BSM) Ready with Compacted Thickness of 100mm

Option 2: Central Plant

• Prepare mix using Centralized Plant
• Transport Mix
• Grade, Roll and Compact
• Treated RAP (BSM) Ready with Compacted Thickness of 100mm