Hot wind circulation Hot in place asphalt recycling machine with air temperature 500~700℃

Equipment introduction and constitute of each unit for hot in place asphalt recycler

I. Compposition for ARHR-5120A type hot in-place recycler

It’s composed of 2 units of heating mobile truck, one unit of milling mobile truck, one unit of channel heating mobile truck, one unit of channel milling mobile truck, one unit of double-layer heating mobile truck and one unit of lifting remixing mobile truck, totally 7 separate units.

ARHR-5120A type hot in-place recycler takes diesel as fuel, which is safe and convenient, application of cycling hot-blast heating minimizes aging in construction, meanwhile, scientific and reasonable unit combination, namely multi-step heating and milling at front end with multi-layer mixture heating at back end compensate for defects of insufficient penetration depth of cycling hot-blast and poor mixture heating effect, which greatly improve quality and efficiency during recycling construction.

II Solution for recycled thickness ≤4CM

1. Original pavement heating

Road surface temperature after 2nd heater heating: 180℃

Road surface temperature after 3nd heater heating: 200℃

2. Heating&milling

3. New material adding and double layer heating

New material adding: precise control according to the set ratio

Double layer heating: increase the temperature quickly, high efficiency

After increasing the temperature: recycled mixture temperature is over 135 ℃

 

4. Heating and remixing

Aggregate collecting, batch type mixing makes more even

Finished mixture temperature after mixing is over 140 ℃

Binding course heated to 90 ℃ before paving, realize “hot bonding”

 

5. Paving

Paving temperature: over 135℃

Paving binding course temperature : about 90℃

 

6. Rolling

Initial rolling temperature: 130℃

Final rolling temperature: 90℃

Process node control	Original pavement heating					Overall evaluation
Heating mode	Heat source temp.	Pavement temp.		Trough bottom temp. after heating	Degree of aging
Infrared heating	900℃～1100℃	250℃～300℃		100℃	serious	High heating temp.; good penetration; aging easily; hidden safety troubles
Normal hot air circulation	350℃～550℃	190℃～200℃		70℃	light	Tender heating temp., bad penetration , bad temp. increasing , good safety
Our layered hor air circulation	350℃～550℃	First layer	160℃～180℃	100℃	light	Front end layered heating Milling Back end layered temp. increasing Tender heating good temp. increasing effect good safety
		Second layer	160℃～180℃	100℃	light