Preparation method of high-performance warm-mix regenerated asphalt mixture

A technology for asphalt mixture and recycled asphalt, which is used in climate change adaptation, roads, road repair, etc., can solve the problems of low strength of recycled mixture, reduced water stability of mixture, and high cost, saving fuel and exhaust emissions, The effect of saving stone and asphalt, saving resources and cost
CN103556560AInactive Publication Date: 2014-02-05云南省公路科学技术研究院
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
云南省公路科学技术研究院
Publication Date
2014-02-05
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a preparation method of a high-performance warm-mix regenerated asphalt mixture, which comprises the following steps: extracting and screening an old asphalt mixture, determining the size distribution and asphalt content of the mixture, carrying out three-main-index testing on the asphalt, and evaluating old asphalt performance indexes in RAP; determining the doping proportion of the RAP according to the performance indexes of the asphalt in the RAP, wherein the doping proportion is generally 50-100%, and the doping proportion can be higher as the performance indexes of the asphalt in the RAP are higher; determining the optimal doped new asphalt consumption (OACn) of the asphalt mixture by a conventional asphalt mixture Marshall five-point process; and after calculating the doped new asphalt consumption, detecting according to according to the performance indexes specified in Asphalt Pavement Construction Technique Specifications (JTGF40-2004) by a testing method specified in Highway Engineering Asphalt and Asphalt Mixture Test Specifications (JTGE20-2011).
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Description

technical field

[0001] The invention relates to the field of road traffic, in particular to a method for manufacturing high-performance warm-mix recycled asphalt mixture. Background technique

[0002] In asphalt pavement asphalt mixture technology, there are currently five methods involving asphalt concrete, RAP recycling, and warm mixing technology.

[0003] The first technology uses all new aggregates and new asphalt. The asphalt mixing plant is used to heat the asphalt temperature and the aggregate temperature to 165 ° C ~ 175 ° C and mix evenly. A uniform asphalt film is formed on the surface of the aggregate. Under the action of the asphalt binder Create structural strength. There is no recycling of RAP involved. Disadvantages: All new aggregates and new asphalt are mixed at 165°C to 175°C, which requires a large amount of resources and high cost.

[0004] The second technology uses 10% to 30% RAP, and also uses an asphalt mixing plant to heat the asphalt temperature...

Claims

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