Technologies

COLD MIX APPLICATION

Cold Mix is produced by mixing suitable grade of bitumen emulsion and unheated mineral aggregates while maintaining the proper moisture content. Cold Mix can be produced either by using pug-mill, WMM plant or even a simple concrete mixer without any requirement of heating. The paver and other construction machineries, as is normally employed in road construction, can be used for execution of these works. BBT Cold Mix is an engineered solution based on the type of aggregate used , weather conditions, site characteristics etc. Specially designed emulsions and additives are used to produce cold mix. BBT Cold Mix properties exceed the requirements of IRC SP: 100
  • Cold Mix technology is field application of mix design based tailor-made bitumen binders with the available aggregates without need of any heating in an environment-friendly manner.
  • It is not necessarily supply of specified grade of bitumen emulsions.
  • Has been used extensively in many countries for new road construction and for preventive/ corrective maintenance.

MICRO SURFACING

Astchem Technologies possess the technical know-how for developing tailor-made polymer modified emulsion for use in Micro-surfacing and other advanced applications.

Micro-surfacing is a five-component system comprising of:

  • Polymer-modified asphalt emulsion
  • Dense graded aggregate & mineral filler
  • Additive
  • Water
  • Cement
Components are cold-mixed together in a micro-surfacing machine and applied to the pavement through a spreader box. Astchem provides the most Innovative emulsion and additive chemistries for micro-surfacing, resulting in Quick traffic system, designed to carry traffic within 30 minutes to an hour.

Astchem Micro-Surfacing emulsion can be used for:

  • High-speed roads
  • Residential Street
  • Airports
  • Bridge Decks
  • Intersections
  • Overlay on concrete surface
It provides the following benefits:
  • Restores skid resistance
  • Alleviates cracked or porous surface
  • Corrects bleeding
  • Seals dry or aged pavement
  • Prevents moisture ingress
  • Prevents reflective cracking
  • Delays in hardening of bitumen due to environment
  • Provides better visibility at night
  • Preserve pavement’s structural strength
  • Saves energy, fuel and aggregate

SLURRY SEAL

Slurry Seal is applied in order to help preserve & protect the under laying pavement structure and provide a new driving surface. It is the application of a mixture of water, bitumen emulsion, aggregate & additives to an existing bituminous pavement surface.

PRIME COAT

Astchem SS-1 grade emulsion as per ASTM D-2397 is specially designed water based Bitumen Emulsion with low viscosity and slow setting that makes it an ideal product for Prime Coat application.

Advantages of Astchem Prime Coat emulsion are:

  • Excellent setting characteristics
  • Bound well with cool, damp surfaces
  • Stable and convenient to use
  • Coats and bonds loose material particles on the surface of the base
  • Hardens and toughens the surface
  • Plug capillary voids in the base course surface

Astchem SS-1 grade emulsion for Prime Coat application goes on to improve pavement performance because it:

  • Makes sub-grade more resistant to moisture and weathering.
  • Good bonding of non-bituminous and bituminous surfaces.
  • More composite structure capable of withstanding heavy traffic loads

TACK COAT

Astchem Bitumen Emulsion RS-1 is a specially designed water based Bitumen Emulsion with excellent viscosity and fast setting time that makes it an ideal product for Tack Coat spray application. It is chocolate brown in colour and is a free flowing liquid at ambient temperature. Astchem Emulsion RS-1 is manufactured strictly as per IS 8887 : 2004.

Advantages of Astchem RS-1 Tack Coat emulsion

  • Increased asphalt content at interface (unaged)
  • Easy to apply and homogeneous curing
  • Low temperature curing
  • High adhesive properties
  • Water resistant and enhances easy drainage of water
  • Fast setting. Low tyre pick-up
  • Enhances structural strength of layers
  • Prevents lateral movements of structural layer
  • Provides an impervious layer to prevent water ingress from water table below the road layer

SURFACE DRESSING

It is a mixture of polymer modified emulsion & a layer of chippings used to seal the surface ,improve surface texture & prolongs the life of the road. It is a steady ,efficient ,economic method of preventive maintenance.

SOIL STABILISATION

Astchem technology for soil stabilization is based on Engineered Emulsion formulated for:

  • Rapid strength development
  • Improved adhesion
  • Resistance to moisture
  • Dispersion and coating

Astchem Engineered Emulsion ensures high bitumen content resulting in good dispersion with higher film thickness ensuring Durability and Flexibility.

It improves pavement performance because it results in:

  • Flexible & strong bituminous stabilized base, which
  • Strong enough for traffic before surfacing

WARM MIX

Astchem Warm Mix technology is additive-based and conforms to the requirements of IRC SP 101:2014. It helps to reduce production and application temperatures of asphalt mix by minimum 30° C, thus resulting in considerable savings in fuel and reduction in emission of Greenhouse gases.

Further it provides the following performance and constructability benefits to the asphalt paving industry:

  • Reduces bitumen aging, by reducing the temperature and retaining most of the good properties of bitumen in the asphalt mix, thus slowing down the rate of deterioration.
  • Improves density, thus improving the strength, stiffness, durability and resistance against moisture damage, hence, increasing longevity of the pavement.
  • Eliminates need of separate anti-stripping agentby virtue of inherent chemistry, thus improving the adhesion between binder & aggregates.
  • Allows compaction even at 90° C, thus allowing more compaction window.
  • Extends paving season as asphalt paving can be done at extremely cold temperatures.
  • Allows use of more recycled asphalt.

CHIP SEAL

Chip Seal is a single surface treatment, involves spraying asphalt emulsion and immediately spreading and rolling a thin aggregate cover. Curing may take one or two days, depending on the weather. Astchem emulsion designed for Chip sealing may be Rapid set or specially designed with or without polymer.

Astchem Chip Sealing Emulsion provides:

  • An economical, all weather surface for light to medium traffic
  • A highly skid resistant surface specially on wet pavements
  • A water proofing barrier for the road structure on paved surface
  • It fills and seals cracks and ravelled surfaces of old pavement
  • It provides an anti-glare surface during wet weather and an increased reflective surface for night driving