Asphalt Mixing Process

Topics: Construction aggregate, Dust collector, Asphalt concrete Pages: 9 (795 words) Published: June 25, 2013
Presentation 01

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Nimesh Priyankara - Univesity Of Moratuwa

Section of Plant
Plant Complex
Account Division Mining Division Crusher Division Asphalt Division

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Nimesh Priyankara - Univesity Of Moratuwa

Asphalt What is it ???????
Uses of asphalt

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Nimesh Priyankara - Univesity Of Moratuwa

Type of Production Plant
There are two type of Hot Mixed Asphalt plant.
01. Drum Plant 02. Batch plant

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Nimesh Priyankara - Univesity Of Moratuwa

Asphalt Plant Division

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Coordinate system
1. Plant manager 1.1 Senior mechanical engineer 1.2 Mechanical engineer 1.1.1 Operator 1.1.1.1 Helpers

Nimesh Priyankara - Univesity Of Moratuwa

Part of Asphalt plant
Screen Hot elevator Hot bin Scalar Bag house

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Stock bin

Drum

Nimesh Priyankara - Univesity Of Moratuwa

Part of Asphalt plant cont.
Cyclone

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Material bin

Bitumen tank
Nimesh Priyankara - Univesity Of Moratuwa

Process of Asphalt plant
Material propagating system

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Material Bin

Drum

Hot Elevator

Screen

Hot bin

Scalar

Mixture

Bag House Screw conveyer

Filler elevator
Filler path

Cyclones

Nimesh Priyankara - Univesity Of Moratuwa

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Types of Asphalt Concrete Mixture 1.Wearing Coarse 2.Binder course That’s depend on the particle size percentage of one batch. In wearing  Finer particle percentage is higher In Binder  Coarse particle percentage is higher

Nimesh Priyankara - Univesity Of Moratuwa

Complete Plant Performance

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Nimesh Priyankara - Univesity Of Moratuwa

Complete Plant Performance cont.
3. Operation model Fully automatic control or Manual control 4.

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Driving power

Total weight

Main Body 317 Bitumen storage 47 heating system

133 28

Nimesh Priyankara - Univesity Of Moratuwa

Complete Plant Performance cont.

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Nimesh Priyankara - Univesity Of Moratuwa

Major Parts

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Nimesh Priyankara - Univesity Of Moratuwa

Cold aggregate supply system

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 4 single bins – capacity 7.5m2  Feeding size of aggregate bin – 3.5m(L) x 2.2m(W)  4 motor power – 1.5kw  Horizontal conveyer belt. Belt capacity - 150t/h Belt length -16.5m (perimeter) Belt width - 600mm Motor power - 4kw

Nimesh Priyankara - Univesity Of Moratuwa

Cold aggregate supply system
0 -5 mm Dust 5 – 10 mm Chip 10 – 15 mm ½ ‘’

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15 – 20 mm ¾ ‘’

Uniform cold feeder
Nimesh Priyankara - Univesity Of Moratuwa

Drying Roller

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Cold aggregate bins  Drying roller (for drying and heating)

Productivity – 120 t/h Length – 8000 mm Diameter – 1910mm Transition power – 7.5 kw x 4 Revolution – 5.1 rpm

Nimesh Priyankara - Univesity Of Moratuwa

Drying Roller

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Mechanism of drying roller
Nimesh Priyankara - Univesity Of Moratuwa

Hot elevator Hot aggregate is elevated to the vibrating screen from the bottom. Plate chain bucket style. Consist of plate link chain Rated capacity – 140t/h Driving Force – 15kw

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Nimesh Priyankara - Univesity Of Moratuwa

Vibrating Screen
Productivity – 130t/h Motor power - 5.5kw Amplitude – 6.3mm Frequency – 1000rpm Screen mesh size (mm) Screening area Screen quntity

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35 x 35 20 x 20
10 x 10 5x5

1275 x 1660 1030 x 1660
2120 x 1660 1740 x 1660

1 1
1 1

Nimesh Priyankara - Univesity Of Moratuwa

Hot bin
Total Capacity – 16m3

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Hot aggregate is screen into four – specification materials from vibrating screen and separately enters 4 bin grids and the waste material bin. overflow opening is set at the top of each bin grid leading to overflow pipe. when material bin is fully, the surplus aggregate flow out of the bin through the overflow pipe.

Nimesh Priyankara - Univesity Of Moratuwa

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Nimesh Priyankara - Univesity Of Moratuwa

Scalar (weight Box)
Hot bin aggregates scaled by scalar
Scalar is scaled the given percentage correctly.

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Nimesh Priyankara - Univesity Of Moratuwa

Mixture

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