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High-content hot-mix recycling asphalt mixture and preparation method thereof

A technology of recycled asphalt with high content, applied in the field of road construction materials, can solve the problems of RAP agglomeration, easy leakage into the mixing tank, inconvenience in construction and production, etc., to reduce heating costs, maintain temperature, and increase utilization Effect

Active Publication Date: 2017-05-31
南京诚开集约建材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, more than 30% of the recycled mixture is a high dosage, and it is easy to cause RAP agglomeration and agglomeration during the production process. It is easy to leak into the mixing tank during the mixing process. Contains agglomerates, which brings inconvenience to construction and production

Method used

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  • High-content hot-mix recycling asphalt mixture and preparation method thereof
  • High-content hot-mix recycling asphalt mixture and preparation method thereof
  • High-content hot-mix recycling asphalt mixture and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1) Recycling and pretreatment of asphalt pavement RAP material

[0030] Carry out sampling inspection on the old asphalt pavement that needs to be milled to ensure that the quality of the pavement material meets the requirements for use, use road milling equipment to mill the old asphalt pavement, classify the old asphalt recycled materials obtained by milling, and avoid the road surface during milling For subsidence, tortoise net cracks and other polluted road sections, ensure that the recycled materials are clean and free of debris.

[0031] 2) Crushing and screening of RAP recycled materials

[0032] The same batch of reclaimed materials obtained in step 1) is fully mixed with machinery, then crushed, and then sieved, and then sieved into fine aggregates with a particle size of 0-5mm, first coarse aggregates with a particle size of 10-30mm, The third gear of the second coarse aggregate of 5-10mm.

[0033] 3) Coarse aggregate mixing and heating and drying

[0034] ...

Embodiment 2

[0042] 1) Recycling and pretreatment of asphalt pavement RAP material

[0043] Carry out sampling inspection on the old asphalt pavement that needs to be milled to ensure that the quality of the pavement material meets the requirements for use, use road milling equipment to mill the old asphalt pavement, classify the old asphalt recycled materials obtained by milling, and avoid the road surface during milling For subsidence, tortoise net cracks and other polluted road sections, ensure that the recycled materials are clean and free of debris.

[0044] 2) Crushing and screening of RAP recycled materials

[0045] The same batch of reclaimed materials obtained in step 1) is fully mixed with machinery, then crushed, and then sieved, and then sieved into fine aggregates with a particle size of 0-5mm, first coarse aggregates with a particle size of 10-30mm, The third gear of the second coarse aggregate of 5-10mm.

[0046] 3) Coarse aggregate mixing and heating and drying

[0047] ...

Embodiment 3

[0055] 4) Recycling and pretreatment of asphalt pavement RAP material

[0056]Carry out sampling inspection on the old asphalt pavement that needs to be milled to ensure that the quality of the pavement material meets the requirements for use, use road milling equipment to mill the old asphalt pavement, classify the old asphalt recycled materials obtained by milling, and avoid the road surface during milling For subsidence, tortoise net cracks and other polluted road sections, ensure that the recycled materials are clean and free of debris.

[0057] 5) Crushing and screening of RAP recycled materials

[0058] The same batch of reclaimed materials obtained in step 1) is fully mixed with machinery, then crushed, and then sieved, and then sieved into fine aggregates with a particle size of 0-5mm, first coarse aggregates with a particle size of 10-30mm, The third gear of the second coarse aggregate of 5-10mm.

[0059] 6) Mixing of coarse aggregate and heating and drying

[0060...

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Abstract

The invention discloses a high-content hot-mix recycling asphalt mixture. The mixture is prepared from the following components in parts by weight: 30 to 70 parts of recycled asphalt pavement (RAP) recycling materials, 25 to 65 parts of new mineral aggregate, 2 to 3 parts of mineral powder, 2.8 to 2.9 parts of asphalt, and 0.1 to 0.2 part of hot-mix recycling agent. The high-content hot-mix recycling asphalt mixture provided by the invention has the following beneficial effects: the RAP recycling materials are screened into three groups with different particle size ranges to facilitate optimizing and control, wherein first coarse aggregate and second coarse aggregate are mixed and heated, so as to realize better flowability without attaching to the inner wall of a drying cylinder. The fine aggregate is used less, quick in heat transfer and easy in heat conduction and can keep temperature very well. Meanwhile, the fine aggregate can be directly added into a mixing bowl without being heated to be stirred together with other materials, so that agglomeration and clot phenomena cannot occur.

Description

technical field [0001] The invention relates to the technical field of road construction materials, in particular to a high-volume hot-mix recycled asphalt mixture and a preparation method thereof. Background technique [0002] For a long time, asphalt mixture recycling technology has been one of the hot research directions in the field of road engineering. Especially with the continuous and rapid development of my country's national economy, after large-scale road construction, a large amount of recycled asphalt pavement materials, namely RAP materials, were produced during the transformation process. Recycling of asphalt mixture can effectively dispose of waste materials, reduce the amount of mining of new materials, save a large amount of asphalt and sand and gravel materials, which is beneficial to environmental protection and saves engineering investment. However, more than 30% of the recycled mixture is a high dosage, and it is easy to cause RAP agglomeration and aggl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/26
CPCC04B26/26C04B2111/00017C04B2111/0075C04B18/167C04B18/12C04B20/0076C04B2103/0068
Inventor 陈贤
Owner 南京诚开集约建材科技有限公司
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