Volvo Construction Equipment designed the P7820C ABG and P8820C ABG as global paving products, with different engines that comply with local market requirements. In Europe and North America, pavers are powered by Volvo’s latest D8 Stage IIIB/Tier 4 Interim emissions six-cylinder, 7-L engine. The P7820C features a 175-kW (235-hp) engine and the P8820C has a 200-kW (268-hp) engine. In all cases these outputs represent a considerable increase in power over the models they replace.
Volvo says the ABG pavers are designed to perform in a variety of applications and material, each having their own power needs. However, most paving jobs will not require full engine power all the time. To conserve fuel while not affecting operation, the operator need only select the smart power mode. This immediately lowers engine rpm to better match power and demand, resulting in fuel savings to 30%.
For all models the noise level is also noticeably lower, partly due to quieter engines but also because of sound-lowering components and a robust frame. In some cases (such as when using the smart power feature), this can represent a 50% reduction in noise levels, which works quite well for residents in urban areas as well as for operators.
The P8820C ABG can pave up to 13 m (42.7 ft) and place 1100 t/h (1200 ton/h), and the P7820C ABG can pave up to 11 m (36 ft) and place up to 900 t/h (990 ton/h). Those throughput levels make these pavers suitable for a wide range of applications, from municipal roads and highways to waste storage areas. They also excel in paving a range of materials, from wearing course and binder course down to base course or even frost protection layers such as CTB.
Operators benefit from an all-around view that allows them to concentrate on the job. A direct view into the hopper, the auger channel, and the work area provides for high-quality paving. The sitting position can be adjusted, as can the control panel. The central control panel can be swiveled, tilted, and extended and also features the latest Electronic Pavers Management II system (EPM II).
Controlling all paving processes, EPM II intuitively guides the operator through working functions. Operators can select menus for the engine data that are shown clearly on a large color screen in multiple languages. EPM II also monitors fuel consumption and contains a Service Interval Manager and Settings Manager.
The Service Interval Manager alerts the operator that a required maintenance is due. The Settings Manager allows operators to save settings in the system, to be recalled in the future when similar conditions are present. This reduces set-up times, improves productivity, and ensures a consistent mat quality. For security, the EPM II console, screed control panel, and auxiliary control panel can be removed and stored in a lockable compartment when not in use.
Both pavers offer both fixed and variable extending screeds, which provide what Volvo says is "industry leading performance" in terms of quality, uniformity, texture, density, and smoothness. This significantly reduces the need for subsequent roller compaction, contributing to a smoother and more even mat.
The screeds can be used on bituminous, concrete base, aggregate, and railway ballast material. Extensions can be added or removed in minutes, with no special tools, using Volvo’s quick coupling system. Variomatic (variable extending) screeds have a dual-electric heating bar arrangement to provide consistent and reliable heating.
Volvo fixed-width screeds feature an efficient gas heating system and can be fitted with fixed and variable extensions. A patented screed load device prevents paving bumps by exerting pressure on the screed for a short period after paving starts.
Paving efficiency is assisted by the large hopper design, working together with the conveyor and large folding wings to avoid segregation and ensure consistent mix of materials and uninterrupted material flow (avoiding stops and starts).
The P7820C ABG’s hopper capacity is 13,500 kg (29,760 lb) of material, while the P8820C ABG capacity is 14,000 kg (30,860 lb). An optional front hopper apron is able to empty material at the front of the hopper into the conveyor system—all but eliminating over-spill, according to Volvo.
Independent, reversible hydrostatic drives, for both bar conveyors and augers, ensure the paving material is moved evenly to both sides of the screed. The optimum head of material is maintained in the auger channel by adjusting the height, speed, and direction of the augers. This larger volume of throughput supports optimum mat quality regardless of width, thickness, or paving speed, as well as continuous paving such as under bridges.
The rubber pad-clad crawler units are maintenance-free and feature individual (electronically controlled) drives for each track. A system monitors track movement and controls motor response to ensure both straight line and fixed radius work is accurate. These, combined with good weight distribution, ensure an efficient paving process.