Laying Procedure
with
PMB 82 E-10.

Aggregate Selection: Select angular, durable aggregates to ensure proper stone-on-stone contact. Coarse aggregates must have a high-strength index.

Fine Aggregates: Should complement coarse aggregates, ensuring right gradation for SMA's open-graded structure.

Filler Material: Use stone dust or hydrated lime to improve binder-aggregate adhesion.

PMB 82 E-10 Binder: High-performance polymer-modified bitumen for high-temp stability and elasticity. Binder content typically 5-7%.

Aggregate Gradation: Follow SMA specs. Higher percentage of larger aggregates. VMA around 18-22%.

Binder Optimization: Prepare trial mixes to find Optimum Binder Content (OBC). Ensure good cohesion and rutting resistance.

Performance Testing: DSR tests for viscosity/elasticity and fatigue testing.

Heating: Heat PMB 82 E-10 to 160°C-180°C. Pre-heat aggregates to 150°C-170°C. Avoid overheating.

Mixing: Ensure thorough mixing in the plant for uniform distribution. The polymer-modified binder improves adhesion and reduces stripping.

Transport: Use asphalt vehicles maintaining temperature between 140°C-160°C. Use covers/thermal blankets.

Paving: Use calibrated paver for uniform layers (30-50mm). Control speed for distribution.

Initial Compaction: Begin immediately with vibratory roller to prevent cooling.

Process: Breakdown rolling (steel-wheel), Intermediate (rubber-tired), Finish (static/rubber).

Density: Target 96%-98% of Gmm. Avoid over-compaction.

Temperature: Maintain between 140°C-160°C during compaction.

QC: Check surface texture, smoothness (profilograph), binder content, gradation, and compaction density.

Post-Construction: Allow gradual cooling/curing. Periodic inspection for distress. Crack sealing if needed.