Ammann’s new ACP 300 ContiHRT asphalt plant

Ammann has introduced its ACP 300 ContiHRT asphalt plant, which was unveiled at Conexpo 2020. The unit is capable of producing mix consisting of more than 60% RAP.

The new continuous plant features Ammann’s innovative recycling technology, already proven worldwide, which maximises RAP utilisation and meets the world’s most stringent emissions guidelines. The gentle pre-heating of the RAP, compared to traditional cold feed to superheated virgin aggregates, prevents thermal stress on the asphalt concrete (AC) content and ensures a highly homogeneous final mix.

The plant incorporates a RAP dryer for the addition of recycled materials and a separate cold recycling feed. “Separate drying and mixing processes ensure the highest quality and versatility – even with complex designs utilising RAP and additives,” said Gunter Tesch, Ammann’s commercial support manager for plants.

The High Recycling Technology (HRT) plant’s gentle preheating prevents AC oxidation, enabling both the aggregate and the coating to be reused – a significant cost saver. The preheating process also minimises fuel consumption and dramatically reduces the levels of CO2 and other pollutants.

The plant is capable of incorporating shingles, liquid additives, fibre granulate and foam AC. It can access a recycling system for RAP utilisation up to 60%; a separate cold recycling system for 30%; or a combination of the two.

The ACP 300 ContiHRT can also produce a high amount of mix without any RAP. Warm mix can be produced with or without RAP. Maximum continuous production capacity of the plant is 299 t/hr (330 USt/hr).

“It’s highly sustainable, and that leads to cost savings,” said Gilvan Pereira, Ammann’s region director for the Americas. “It’s the best of many worlds. The high recycling technology creates a very sustainable mix. You’re essentially turning waste into aggregate. The low temperatures reduce fuel costs – and minimise emissions, too. This provides value on many levels. You’re developing a green product and reducing costs in the process.”

The proprietary as1 Control System, the brains of the ACP 300 ContiHRT, is operating in hundreds of plants around the world. The system is highly regarded for its intuitiveness, quality and cost-saving efficiency.

A unified service platform and stairway concept allows effortless ergonomic access to the major asphalt components – especially Ammann core parts such as burners, drums, filters and the twin-shaft mixer.

Installation and relocation of the plant is quick and uncomplicated. The horizontal design ensures fast and easy assembly and disassembly. Optional quick cabling and steel skids further speed up the relocation process.

A wide range of optional equipment is available. It includes burners for light oil, natural gas and LPG; storage silos of 299 t in two compartments or 599 t in four compartments, which are available as long-term storage solutions; and AC tanks with superior insulation, a filling pump and tank-to-tank pumping and circulation. Cold feed system options comprise additional feeders, vibrators and gravimetric dosing.