HINCOL CHIP SEAL EMULSION RS2(Bulk)

HINCOL Chip Seal Emulsion RS2 is a Rapid Setting Cationic Bitumen Emulsion primarily used for Surface Dressing (Chip Seal) on roads. It bonds crushed aggregate chippings to the road surface, improving skid resistance, waterproofing the pavement, and extending road life. It is used in Single, Double, Racked-in, Inverted Double, and Sandwich Chip Seal applications.

• RS1: Low viscosity (20–100 sec @ 50°C), minimum 60% binder content. Used primarily as a Tack Coat for bonding new asphalt overlays to existing pavement.
• RS2: High viscosity (100–300 sec @ 50°C), minimum 65% binder content. Used for Surface Dressing / Chip Seal — it must hold aggregate chippings in place under traffic.

HINCOL RS2 Chip Seal Emulsion has a minimum binder content of 65% as per IS 8887:2018. Higher binder content is essential for surface dressing to ensure strong aggregate embedment and retention under traffic loads.

Polymers added to Chip Seal emulsions provide several advantages:

• Reduced thermal susceptibility — the binder doesn’t bleed in summer or become brittle in winter.
• Better aggregate retention after curing and opening to traffic.
• Improved flexibility, which translates to better thermal crack resistance.
• Higher softening point of the residue binder.

HINCOL recommends Polymer Modified Bitumen Emulsions for all chip seal applications with AADT > 2000.

The most commonly used aggregate (chipping) sizes with RS2 are 2/6 mm, 6/10 mm, 10/14 mm, and 14/20 mm. The size is selected based on traffic volume, type of chip seal design, and existing road surface condition. All aggregates must comply with gradation standards — oversize and undersize fractions are excluded.

The binder spread rate for Single Chip Seal using RS2 depends on chipping size:

• 10/14 mm chippings: Binder rate ~1.8 l/m², Chippings 9–11.5 l/m²
• 6/10 mm chippings: Binder rate ~1.5 l/m², Chippings 6–8.5 l/m²
• 2/6 mm chippings: Binder rate ~1.3 l/m², Chippings 4–5.5 l/m²

These rates assume 70% nominal binder content and use of crushed rock chippings.

Pavement evaluation after Chip Seal involves visual assessment of defects at project completion and at the end of the defect liability period. Defects assessed include:

• Bleeding, Fatting, Fretting, Scabbing, Tearing, and Tracking
• Delamination, Loss of aggregates, Wearing, Lane joint gaps, Rutting, and Slippage

Field quality tests include Sieve Analysis (1 per day/job site), Bitumen Content (1 per batch), Softening Point of Residue (1 per batch), and Rate of Application (1 per day/machine).

Chip Seal (Surface Dressing) should not be applied:

• During rain or when rain is forecast within a few hours.
• When ambient temperature is below 10°C or road surface temperature is too low.
• On wet or damp road surfaces.
• On structurally failed pavements — Chip Seal has no strengthening ability and should not be used as a structural repair.

Yes. HINCOL Chip Seal Emulsion RS2 is manufactured in strict compliance with IS 8887:2018 (Cationic Bitumen Emulsion specification) and quality is maintained under ISO 9001:2015 certified processes. All batches undergo testing in HINCOL’s advanced laboratories for bitumen content, viscosity, particle charge, storage stability, and residue properties.

The defect liability and warranty for Chip Seal will not cover:

• Damages caused by base failure of the underlying pavement.
• Mechanical, chemical, or physical damage to the Chip Seal job after handover.
• Damages to the Chip Seal due to unforeseen natural calamities.

HINCOL evaluates aggregate quality across multiple attributes to ensure compliance before finalising the aggregate source:

• Geology – origin and rock type
• Shape – cubical, not flaky (Flakiness Index limits as per IS)
• Texture – rough surface for better binder adhesion
• Cleanliness – free from dust and deleterious material
• Abrasion Resistance – Los Angeles Abrasion value
• Reactivity – compatibility with cationic emulsion
• Soundness – resistance to weathering

No. Chip Seal (Surface Dressing) in itself has no strengthening ability. It is a surface treatment that improves skid resistance, provides waterproofing, and prolongs service life by protecting the underlying pavement layers. For roads requiring structural strengthening, Chip Seal is used as an integral element alongside other techniques such as WMM, Emulsion Treated Bases, and bituminous mixes.