Batch Hot Mixture Asphalt Plant (PART 3)

Posted by aditya | 4:28 PM | | 7 comments »


◊ The pugmill is typically a twin-shaft, counter-rotating mixer designed to coat the aggregate quickly with bitumen. The material mixed for a period that is generally around 45 seconds.


◊ After mixing, the bituminous mixture is discharged directly into a truck or is transferred into a storage silo where trucks may be loaded for transport to the site.
Batch plants may be manual, semi-automatic or automatic depending on the degree of automation. In manual plants, air cylinders or hydraulic cylinders, actuated by the operator by electric switches, control bin gates, fines feeders, bitumen supply and spray valves, the weigh box discharge gate, and the pugmill discharge gates.
In semiautomatic batch plants, the various operations constituting each mixing cycle are under automatic control. Thus, the quantities of bitumen and aggregate introduced into the mixes, the mixing times, the sequencing of the mixing functions, and the operation of the pugmill discharge gate are controlled automatically.
The fully automatic batch plant repeats the weighing and mixing cycle until the operator stops it or until it stops itself because of material shortage or some other extraordinary event. Automatic plants also normally provide a record of the amount of material incorporated into each batch.

Title Post: Batch Hot Mixture Asphalt Plant (PART 3)
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Author: aditya

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