Regeneration field mixed asphalt and preparation method thereof

Abstract

The invention relates to the technical field of regeneration field mixed asphalt and particularly relates to regeneration field mixed asphalt and a preparation method thereof. The regeneration field mixed asphalt is prepared from the following raw materials in percentage: 15-55% of waste asphalt pavement material, 45-85% of new aggregate, asphalt-aggregate ratio being 4-8%, limestone ore powder being 4-8% of new aggregate, dehydrated crude oil being 5-20% relative to the total weight of new and asphalt materials, catalytic cracking oil slurry being 5-10% relative to the total weight of new and asphalt materials, and a lubricating oil dispersant being 1-12% relative to the total weight of new and asphalt materials. According to the invention, a waste asphalt pavement is dug up and taken back to a mixing factory to be crushed all together; proportioning design is carried out according to quality requirements of pavements at different grades so as to determine the addition proportion of waste asphalt mixture so that the waste asphalt mixture is re-blended according to a certain proportion in a mixer to generate a new mixture, thus obtaining excellent regenerated asphalt concrete which can be used for paving a regenerated asphalt pavement. By implementing the preparation method of the regeneration field mixed asphalt, regeneration and recycling of resources can be realized and the road material cost is reduced.

Description

Technical field [0001] The invention relates to the technical field of asphalt mixing at a regeneration site, in particular to a asphalt mixing site and a preparation method thereof. Background technique [0002] During the long-term use, the asphalt pavement is subjected to the combined action of the traffic load and natural factors, and a series of physical and chemical changes have occurred, and the road performance is attenuated. [0003] In my country, most of the pavement structure forms are: base layer (cement-lime comprehensive stabilized soil or graded crushed stone) + base layer (cement stabilized crushed stone or lime-fly ash comprehensive stabilized crushed stone) + surface layer (asphalt concrete or cement concrete pavement) . The damage of asphalt pavement is largely determined by the quality of the base layer. The water-stable base layer is prone to temperature shrinkage and shrinkage cracks, leading to reflective cracks on the road surface, affecting the performanc...

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Problems solved by technology

[0007] Aiming at the deficiencies in the prior art, the purpose of the present invention is to provide a recycled field-mixed asphalt and its preparation method, which can use up to 55% of the asphalt material of the old road surface milling as a raw material, so as to solve the problem of existing old road surface milling and planing. Asphalt waste pile pollution problem; realize resource regeneration and recycling; reduce the cost of road materials; in order to ensure road quality, build safe and smooth roads, scientifically cooperate with new aggregates, and verify the raw materials described in the patent after hundreds of formula and process tests The dosage and process parameters are characterized by relatively simple production process, strong practical applicability, and relatively low cost. The product can be used for the laying of general asphalt roads, high-grade and expressways

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