What is HIPR

Hot In Place Recycling (HIPR) is a process of heating up the existing asphalt pavement surface, loosening it, mixing it with rejuvenating agent with or without new hot mix material in an on-board pug-mill mixer and laying it back on the same pavement surface, all in a single pass operation.

The Application

With HIPR, the effective depth of scarified pavement layers is up to 50 mm. The primary purpose of the HIPR technique is to correct surface distresses. HIPR provides solutions to surface crackings, minor ruttings, ravelling and stripping. HIPR can also be used to recoat stripped aggregates, re-establish crown and drainage and modify aggregate gradation and asphalt content, and improve surface frictional resistance.

“…an on-site method that rehabilitates deteriorated bituminous pavements surface with minimal use of new material…”

The Operation

1. Pavement surface is softened with radiant convection heat

2. Remixer scarifies the surface material and mixes the material with recycling agentand virgin mix

3. While still hot, the newly remixed material is laid down

4. Rolled to final compaction

The Advantages

HIPR offers a viable cost-effective technique for rehabilitation of pavements by using existing in-place materials. HIPR represents the future of pavement technology and will replace conventional pavement rehabilitation methods.

– Cost effective where operations use less manpower and machineries, and a shorter construction time. Saves on the investment in repair costs.
– Versatile where pavements are now easy to construct through one pass operations, production is highly mobile, and causes less traffic disruption.
– Ecologically Friendly where existing materials can be reused, causes less air pollution and conserves natural resources (quarry product).

The Machinery


Max. recyling depth : 0 – 60 mm
Working width : 3,000 – 4,500 mm
Heating performance : 1,445 kW


Heating width : 4,500 mm
Heating surface : 44.64 m 2 – Infrared heating
Max. heating capacity : 2,260 kW