How to choose the regeneration mode?

The first step: a large number of preliminary investigations. Including surveys of historical data, damaged pavement condition, road structural strength, material properties such as the old pavement. Historical data include viewing the same route survey design, construction, completion, maintenance and repair, and traffic information. Road surface defects are damaged condition, the degree of deformation and cracks View Road, and survey the road and grassroots conservation activities, subgrade problems. Pavement structural strength and deflection survey is conducted to see the thickness of the pavement structure. Old pavement material properties investigation is the analysis of the degree of aging of old asphalt, aggregate and old components.

Step two: pavement condition evaluation, which summarizes the performance of the old asphalt pavement. Including pavement condition index PCI, pavement strength coefficient SSI, ride quality index PQI, road surface friction coefficient SFC and comprehensive evaluation PQI.

The third step: primaries regeneration mode. According to the original road conditions and the existing conditions in the CIR, in situ thermal regeneration, regeneration and full depth, plant mix cold recycling, hot mix plant regeneration regeneration mode primaries.

Step Four: screening regeneration mode, pay attention to the economic analysis, analysis of initial investment costs and life-cycle costs and other issues.

Step Five: finalization regeneration mode and detailed process design and analysis.

How to understand the theory of aging asphalt recycling?

Asphalt recycling is actually reverse the aging process of asphalt, asphalt recycling technology approach taken, in theory, is: adjust the viscosity of the old asphalt, making it down to the desired viscosity range; adjust the rheological behavior of the old asphalt, so the old asphalt reduced non-Newtonian behavior. Recycling old asphalt pavement recycling agent is added, new asphalt and new aggregates and asphalt mixing into, meet certain performance and re-paved road to the road.

How to choose the playback device?

There is a big gap between domestic and international recycling equipment, recycling equipment for the introduction and selection should focus on the following aspects: to understand the functions and features of various types of equipment, consider the product price, consider the service and parts supply and see if the manufacturer provides technical support and training.

How to choose the plant mix asphalt pavement structure type thermal regeneration?

First, we must consider the road grade, traffic and local natural climatic conditions; secondly, to consider the requirements of renewable pavement structure, thickness and regeneration of the road; in addition, the quality of regeneration agents, new materials and new asphalt and aggregate supply and construction and technical conditions are necessary considerations.

How situ thermal regeneration pavement structure design?

The level and mix of traffic jointly determined by the recycled asphalt roads, highways Grade B or lower can be directly used as a surface layer of the original pavement. Given the current limitations of construction technology, renewable for highway asphalt, should be used in the layer below.

The thickness of the thermal regeneration in situ by limiting reproduction equipment typically 2-5 cm, using a complex mix overlay type load needs to be based on the thickness of the overlay structural design calculations or functions.

Restricted construction process recycled asphalt types are generally consistent with the original asphalt type.