Hydraulic Power Extendible Asphalt Screed
Ease of operation, high-efficiency LPG or electric heating systems provide great flexibility on job sites.
The AS3251 combined with Cat® asphalt pavers offers optimum maneuverability and advanced technology that make it an ideal piece of machinery for paving applications where maximum flexibility is required for jobs that dictate frequent changes to the paving width.
The screed frame provides optimal resistance to bending and twisting forces.
The screed configurations with tamper, vibrators, LPG or electric heating system combine the flexibility to match equipment to operator preferences or job requirements.
Common applications include highways, interstates, airports, industrial sites, large parking lots, urban and rural roads, subdivision streets and projects that require variable width paving.
Screed smoothing plates deliver a high-quality mat and a long service life.
The screed smoothing plates are constructed of abrasion resistant Hardox 400 that resists damage and provides an enhanced service life.
The design of the screed smoothing plates provides rounded edges to prevent the smoothing plates from scoring the paving material when screed width is varied.
The screed smoothing plates are 15 mm thick to enable them to be heated up quickly and uniformly without affecting durability.
The platforms provide rigid support for screed plates, which simplifies leveling.
Easy-to-adjust end gates ensure a good joint with the adjacent mat.
End gate design provides optimum strength, rigidity and efficient operation. The bolt-on design allows easy end gate installation and removal.
The end gates may be either fixed (standard version) or hinge-mounted (optional) so that they can be turned semi-automatically to bring the outline of the asphalt paver within the 2500 mm wide limited easily and effortlessly.
The end gates are held in position by steel rollers and helical springs mounted on the outside to guarantee an effective containing effect which prevents deformation by the paving material. At the same time it allows the end gates to slide easily under all working conditions.
The end gates have two independent lift manual adjusters, one acting on the front of the end gate and the other on the back. The end gate can be adjusted to a well-defined working height and may even be set at an angle.
Maximum paving width of 7500 mm with mechanical extensions provides the maximum flexibility on job sites.
Two extendable support tubes and a third frame member provide optimum support for each extension.
A graduated scale indicates the distance that the extensions move in or out.
The tamper system prevents undesirable marks on the mat surface. Tamper adjustment is electrically controlled.
Hydraulically driven vibrators located on the extensions, are synchronized with the main screed to match frequency and amplitude.
The adjustment allows the extension to match the main screed height.
Screed Plate Heating Systems
The AS3251 offers an LPG screed plate heating system or an electric screed plate heating system.Both systems are highly efficient and provide fast warm-up.
The LPG heating system features eight high-energy burners and optimum thermostatic temperature control.
The electric heating system features a tractor-mounted generator, replaceable heating elements and operator friendly controls.
Generator System (Tractor Option)
The generator system supplies power to the optional electric screed heat providing high reliability.
Auxiliary Rear Control Panel (Tractor Option)
The right-hand auxiliary rear control panel provides full control for tamper and vibrators frequencies, screed assist & counterbalance adjustment and augers group raising/lowering.
Screed Control Panels
The modular patented main screed control panels are mounted on each side of the screed. The left and right control panels include extensions in-out, paving thickness control, augers & conveyor switches, adjusting working range potentiometer and emergency & horn buttons.
includes electronic ignition for smoothing plates and automatic temperature control.
includes on/off heat control switch, three pre-set temperature settings for each screed section, fault indicators and manual overrides for each screed plate section.
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