Mastic Asphalt Mechanised

West Coast is a Pioneer in the field of Mechanised Mastic Asphalting having fully computerized manufacturing plant and a fully automated mechanised paver & heat insulated transit mixers imported from Germany. We are India’s first company to introduce this technology. Bandra Worli Sealink and Western Express Highway in Mumbai are our Iconic Projects besides NHAI.

Mastic Asphalt, Plant

Mastic asphalt was first used as a wearing course on carriageways in the 1860s and a century of testimonials is proof of its superior durability.

The Mastic Plant : Batchmix Type, Fully Computerized & Integrated Mastic Asphalting Plant.

The plant consists of cold storage bins, drier, hot bin, bitumen storage tank, twin drum type mixer, control room and digital control panels. The plant is designed to provide the mastic mix as per the job mix formula. The proportioning of various components, their temperature, the weights of limestone powder, bitumen, aggregates from hot bin for each batch, mixing time, etc. are controlled through the digital control panel in the control room. It functions without violating the environmental norms of noise and dust pollution. The plant production Capacity: 60-80 TPH

Transit Mixer & Laying by Paver

It is an insulated, tilting steel drum provided with rotating mixing arms and heating facilities with oil fired burners for the circulations of thermal oil in its jacket. Mastic Produced in Heat Insulated Rotating Drum is Poured into Transit Mixer by Opening the Outlet Gate & a Temp of Approx 200 Degrees. The mix is poured on the surface by tilting the drum. The action of mixing of components continues in the transit mixer till the mix from the plant is transported to the laying site. The capacity of a mixer is 10 T.

Laying by Paver

It is operated by a diesel engine by means of a hydraulic system. Heating of the float is done by LPG fueled infrared heaters attached to it. The special profiling with precision and smoothing zones on the float guarantees optimum laying results. The paver helps in spreading and floating the plastic mix uniformly on the surface to the desired width and thickness at correct grade and camber, through its heated, distortion free steel float and turning sword distributors. The Laying width of the Paver is 3.5 m- 7 m.

The Paver can lay/day:

* 12 mm- up to 2000sq.m
* 25mm- 1600-1800sq.m
* 40 mm- 1200-1500sq.m

Advantages

* Very speedy execution drastically reducing time required for project completion.
* Uniform and wider laying with fewer joints.
* Road can be put to use immediately.
* Mix is produced at the plant, away from the site. Hence, there is no handling of raw materials at site, which helps in keeping the site clean.
* Better riding quality.

Traditional Method

Traditionally Mastic Asphalt laying is done manually by hand using heavy wooden floats after the mix is cooked in small cookers on site. Mastic Cooker: It is a modified version of Tar Boiler having compartments and oil fired burner. The central and main compartment is used for heating bitumen and for preparing the mix. The six side pockets are meant for preheating of the coarse and fine aggregates. Since heating is by oil fired burners, the temperature can easily controlled by controlling the flames or supply of the fuel.

Transportation: Wheelbarrows, flat mortar pans and small dumpers are used to carry the mix from cooker to the location of laying.

Laying: The mix is deposited directly on the prepared surface and spread uniformly by hand using wooden trowel, heavy wooden floats, hand tools, straight edge and hand level. The temperature of the mix at the time of laying shall be at least 170ºC.