A high modulus modified recycled asphalt mixture and its preparation method and application

A technology for recycled mixtures and asphalt mixtures, which is applied in the field of asphalt mixtures, can solve the problems that the recycled mixtures cannot rationally use asphalt modification methods, cannot effectively digest the accumulation of waste materials, and do not pay attention to organic combination, etc., to achieve Compensating for lack of fatigue performance, eliminating rutting, and prolonging durability
CN105948569BActive Publication Date: 2018-05-01SOUTHEAST UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SOUTHEAST UNIV
Publication Date
2018-05-01

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Abstract

The invention discloses a high-modulus modified recycling bituminous mixture and a preparation method and application. The recycling bituminous mixture comprises 40-60 wt% of bituminous pavement recovered material and 40-60 wt% of new mixed bituminous mixture, and the new mixed bituminous mixture comprises compound modified bitumen and new mineral material. The compound modified bitumen comprises 55-65 wt% of road bitumen and 35-45 wt% of rock bitumen, and the total content of bitumen in the recycling mixture is 5-6 wt%. The preparation method of the modified recycling bituminous mixture includes stirring the new mineral material and bituminous pavement recovered material, adding compound modified bitumen, and stirring the mixture and performing moulding at specified temperature. The prepared recycling bituminous mixture fully performs the hardening characteristic of the bituminous pavement recovered material after aging, improves the high temperature property and dynamic modulus of the recycling bituminous mixture. Moreover, the preparation method of the recycling bituminous mixture is low carbon and environmentally friendly, and has good rutting resistance by using the designed recycling pavement structure.
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Description

technical field

[0001] The invention belongs to the field of asphalt mixture, and in particular relates to a high-modulus modified recycled asphalt mixture, a preparation method and application thereof. Background technique

[0002] my country's highway construction has made unprecedented progress in the development process of nearly 20 years, and more than 90% of the highways use asphalt concrete pavement. Due to the huge amount of expressways, about 12% of the asphalt pavement in our country needs to be maintained and repaired every year, and the waste asphalt mixture produced by the renovation is as high as 2.2 million tons, and the number is growing at an annual rate of 15%. These waste asphalt mixtures still have utilization value. If they are discarded, it will not only take up a lot of land resources, but also cause immeasurable harm to the environment. The regeneration technology of asphalt mixture has made great progress since its birth. If the waste asphalt mixtur...

Claims

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