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	9001100	250300		100	serious	High heating temp.; good penetration; aging easily; hidden safety troubles
Normal hot air circulation	350550	190200		70	light	Tender heating temp., bad penetration , bad temp. increasing , good safety
Our layered hor air circulation	350550	First layer	160180	100	light	Front end layered heating Milling Back end layered temp. increasing Tender heating good temp. increasing effect good safety
		Second layer	160180	100	light