Preparation method of plant-mixed hot recycled asphalt mixture

An asphalt mixture and thermal regeneration technology, applied in the field of road engineering, can solve the problems of increasing the difference in the production mix ratio of the recycled mixture, reducing the economic advantage of the recycled mixture, affecting the performance of the recycled mixture, etc. Easy to achieve and prevent whitening effect
CN104844072AActive Publication Date: 2015-08-19TONGJI UNIV
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
TONGJI UNIV
Publication Date
2015-08-19

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Abstract

The invention discloses a preparation method of a plant-mixed hot recycled asphalt mixture. The preparation method comprises the following steps: (1) after heating new aggregates, adding the new aggregates into a mixing cylinder; (2) after heating part of new asphalt, adding the heated new asphalt into the mixing cylinder for the product obtained in the step (1) for mixing; (3) after heating RAP (recycled asphalt pavement) materials, adding the RAP materials into the mixing cylinder for the product obtained in the step (2); (4) adding the rest of new asphalt into the mixing cylinder with the product obtained in the step (3) for mixing; (5) adding mineral powder into the mixing cylinder for the product obtained in the step (4) for mixing; and (6) taking the mixture obtained in the step (5) out of the cylinder and carrying out forming. The method disclosed by the invention has the advantages of easy implementation, high recycling efficiency of old materials, small use quantity of the new asphalt, effective prevention from generating grizzled materials in the recycled mixture, higher uniformity of the recycled mixture and better performance.
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Description

Technical field

[0001] The invention belongs to the technical field of road engineering and relates to a method for preparing a plant-mixed hot regenerated asphalt mixture. Background technique

[0002] The production process of plant-mixed hot recycled asphalt mixture is to transport waste asphalt pavement materials (RAP) to asphalt mixing plants (sites, stations), crush and screen them, and then mix them with new aggregates, new asphalt, and asphalt in a certain proportion. A hot-mix regenerated mixture made of regenerant (if necessary). Its main function is to repair asphalt pavement surface layer diseases, restore or even improve the road performance of asphalt pavement mixture, and realize the recycling of old pavement asphalt layer materials in the form of hot mix asphalt mixture. It has the advantages of easy control of the regeneration process, better performance of the regenerated asphalt mixture, and wide application range. However, in the conventional mixing process,...

Claims

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