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Hot Mix Asphalt Storage Systems

Free standing, transportable and mobile, inclined track skip storage systems with capacities from 25 to 320 tonnes

Available in configurations to suit individual customer requirements using up to four silos.

The Parker hot mix storage system allows the contractor flexibility to mix and store hot coated aggregates directly from the asphalt plant mixer without the interruption of lengthy and costly delays when trucks are not available to load, whilst at the same time reducing the waiting time when trucks are in position and loading.

Static And Transportable Hot Storage Systems


Designed to be incorporated as the high capacity load out facility within any batch production asphalt plant, the range incorporates features required for storage efficiency and load out accuracy.

  • Modular designed structures allow for easy and quick installation at site.
  • Variations of skip size from 1.0 tonne up to 5.0 tonne are available to match the direct mixer batch load out requirement of the asphalt plant.
  • Inclined skip tracks are hinged to allow access at the plant mixer for direct vehicle loading.
  • “Foul” batch / clean out hoppers are provided for direct loading.
  • Structures, storage silos and distribution skip can be provided with optional levels of sheeting, insulation and heating to minimize heat losses and extend storage periods for hot mix products.
  • Load cell mounted individual silos can be provided as options to provide additional levels of load out accuracy and when automatic load out of materials is required.
  • Galvanised access platforms and walkways are provided for access and maintenance.
No. Silos Single Silo Double Silo Triple Silo Quad Silo
Storage Capacity (t) 50 80 100 120 160 210 200
Silo Configuration (t) Single Size 50/70 70/90 50/70/90 4x50

Mobile Hot Storage System


Specifically designed to provide high mobility of equipment and speedy on-site set up, the Parker range of mobile storage systems are ideal for contractors requiring an easily re-locatable storage facility for hot coated asphalt materials. A single road towable unit incorporates the insulated storage silo, skip track, distribution skip and drive winch on one wheel mounted chassis for ease of transportation and re-location of equipment.

  • The compact design ensures a minimum restriction to plant layout and site vehicle movement.
  • The single unit design ensures fast on site installation and re-location.
  • Requirement for pre-prepared foundations is minimized.
  • Material load out and skip to silo distribution is integrated with the main plant system and the inclusion of an inverter controlled winch / skip drive system provides an additional operational accuracy.
  • An insulated hot storage silo and insulated distribution skip assist in minimising any material temperature loss and ensures an extended storage period for hot mix materials.
  • Galvanised access platforms are provided for access and maintenance.

25 Tone Capacity Silo

25t specs mobile
25t specs

50 Tone Capacity Silo

50t specs mobile
50t specs

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Hot Mix Storage
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Mobile Hot Storage
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Bitumen Storage Systems

Bitumen tank farms and heating systems for use with asphalt plants.

Parker has many years experience in the supply of bitumen storage, heating and delivery systems associated with the use of hot mix asphalt plants used in a wide range of applications and site conditions around the world. Now we bring additional expertise from the established and well respected Cartem brand of products to the lineup of equipment on offer. An extensive list of both vertical and horizontal tanks, heated either electrically or by hot oil circulation, are available with a variety of options.

Vertical Storage Tanks


Being the preferred type of tank storage in locations where site area is at a premium the tanks are usually electrically heated The bitumen temperature and tank content levels can be continually monitored, adjusted and operated from the remote asphalt plant control function and in keeping with the latest health and safety regulations, alarm warnings for high temperature and overfill functions are now installed as standard.

  • Tank capacities from 30 to 150 m³ are available.
  • Variations in levels of tank insulation, tank maintenance access, stirrers and agitation equipment are just a few of the options available to the individual customer.
  • To reduce ever increasing energy costs, a range of electrically heated high efficiency vertical tanks are available conforming to RBA best practice design which include no less than 300mm thickness of insulation with energy consumption further minimized by the use of progressive heating control.

Horizontal Storage Tanks


Being easier for transportation and requiring usually only a single crane to install, horizontal hot oil heated horizontal tanks are generally the preferred tanks supplied into the export market.

  • Tank capacities from from 30 to 60 m³ are available.
  • Fitted with integral heat transfer coils and automatic temperature control valves.
  • Variations in levels of tank insulation, tank maintenance access, stirrers and agitation equipment are just a few of the options available to the individual customer.

Horizontal Storage Tanks


In addition to electric heating systems, a range of high efficiency, fully automatic hot oil heaters is available to provide the heating source for both the storage tanks and the bitumen pump and delivery pipework.

Heating capacities of 300,000 to 800,000 kCal/h are available.

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Recycled Asphalt Pavement (RAP)

Systems to introduce reclaimed asphalt into the hot asphalt mix

With increased costs of energy and the reduced availability and cost associated with extracting and processing virgin materials, the addition of recycled asphalt pavement (RAP) into the hot asphalt mix is becoming an increasingly important factor in surfacing materials and consideration by us for asphalt specifiers and producers alike.

Parker have for many years been designing solutions and overcoming the difficulties associated with the introduction of RAP materials to achieve more economical and environmentally acceptable methods of asphalt production.

rap

RAP bins and RAP system on StarBatch asphalt plant, showing conveyor/elevator feeding reclaimed material directly into the mixer.

Systems are available to allow introduction of the pre-processed cold RAP material directly into the asphalt plant hot elevator at a ratio of approximately 10%, or a higher percentage of approximately 25% can be achieved with a direct feed into the mixer process. Equipment to monitor and control the amount of RAP material introduced either by volume or by weight would be included within the system along with moisture evacuation equipment integrated into the operational process and control system of the plant.

RAP addition systems can be designed from our experience and standard range of equipment for inclusion within new plants or for retro-fitting into existing asphalt plants and will include some or all of the following:

  • Suitable free flowing cold RAP feed hoppers including variable speed feeder systems.
  • Feed system belt conveyors and elevators for RAP transfer.
  • Volumetric and weight metering equipment.
  • Self-sealing feed chute systems for introduction of RAP materials into mixer and/or elevator.
  • Integration of RAP control system into batch control operation.
  • Steam evacuation systems and associated ducting.

Other equipment and systems can be designed to suit specific requirements and higher levels of RAP material introduction.

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Asphalt Plant Dust Filters

Asphalt plant ancillary dust collection equipment

Asphalt plants of all types require systems for controlling and collecting the airborne dust emissions produced during the drying and handling process. The particulates collected from the dryer exhaust are usually retained and refed into the asphalt mixing process where they are included as part of the asphalt product recipe.

Two stage systems are generally employed to remove the coarse and fine particulates separately from the air flow and they can be defined as follows:

Primary Dust Collection


Parker includes two options for the primary dust collection process and these are usually defined by their use in static or mobile versions of the asphalt plant.

Skimmer systems are better suited to static installations where space practicality and plant layout allows or alternatively multi-cyclone systems mounted as assemblies are ideal for combining within the dryer section of the plant on mobile equipment.

Both skimmer and cyclone systems are designed to remove coarse dust between 75 and 200 µm with the collected particulates reintroduced into the mix and ensuring that wear to the exhaust ducting and secondary stage filter is minimized.

skimmer
cyclone

Secondary Dust Collection


Parker secondary bag filter systems are guaranteed to deliver dust emission levels of less than 20 mg/m³ and enables asphalt plants to be sited in the most environmentally sensitive locations.

Reverse air cleaning of the high temperature resistant bags eliminates the need for a high pressure cleaning system and as such the operational life of the filter bags is extended.

Modular static and transportable bag filters types are available along with fully mobile designs, all of which will collect and transfer the minus 75 µm reclaimed dust for use as reclaimed filler material within the asphalt plant or allow for separate dust disposal.

All ancillary items for transfer, storage and disposal of materials can be supplied to compliment the dust collection systems range.

A comprehensive range of filter cages can be found at Modern Air Systems

static bag filter
mobile bag filter

Baghouse systems are available for mobile, transportable or static installations.



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Dust Collection
disposal
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Asphalt Plant Dust Storage & Disposal Systems

Ancillary equipment designed for the transfer, collection, storage and disposal of dust and filler products utilised within the asphalt plant process

Site conditions, plant location and production requirements give rise to many variations of plant layouts and configurations to suit an individual customer requirements and Parker caters for them all.

Whether the asphalt plant is mobile, transportable, static, high level or low level, in all cases Parker filler handling systems are designed to compliment the same demanding engineering standards as the rest of the plant and give due consideration to all environmental, health and safety issues.

Filler Transfer and Storage Systems


The range includes:

  • Free standing low level silos for mobile asphalt plants
  • Free standing silos on raised structures for conventional tower asphalt plants
  • Free-standing silos on raised structures for tower plants
  • Split compartment twin vertical silos for high level asphalt plants with integral product storage
  • Horizontal, mobile silos for complimenting ultra-mobile plants
  • Pneumatic conveyor systems filler screw conveyors and elevators for transfer of materials

Mobile Silo Pecifications:

The size of silo will depend of the size of plant but is usually not less than 25% of the plant output capacity

45m³ Mobile ~ Reclaimed horizontal filler silo with top mounted screw

reclaimed

45m³ Mobile ~ Imported horizontal filler silo with top mounted Jet Filter

imported

Travelling Dimensions
Capacity Dimensions (mm)
A B C
22m³ (Reclaimed) 8200 4850 2440
22m³ (Imported) 8200 4460 2440
45m³ (Reclaimed) 12260 4850 2440
45m³ (Imported) 12260 4460 2440

Dust Disposal Systems


Many asphalt plants operating with certain types of aggregate material generate excess filler dust that due to increased awareness and environmental legislation requires efficient disposal methods.

Parker offers two main alternatives:

  • Wet dust conditioning unit where the excess dust is fed by screw conveyor into a continuous discharge mixer. Minimal water is added through spray bars positioned over the mixer where the twin contra-rotating shaft design provides conditioning of the dust and creates an easily manageable dust free cake to discharge to storage bay or truck for onward disposal.
  • Dry dust disposal which is a system for delivering dry dust directly into tankers with the minimum dispersion. A retractable discharge bellows is connected to the discharge outlet of the silo or screw conveyor feeding excess dust to a tanker.

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Filler Systems

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