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SMA (styrene maleic anhydride) on-site thermal regenerated asphalt mixture

A technology of asphalt mixture and thermal regeneration, which is applied in the field of asphalt recycled materials, can solve environmental pollution and other problems, and achieve the effects of avoiding environmental pollution, saving resources, and making up for aging and loss

Inactive Publication Date: 2013-08-28
JSTI GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no relevant research on regeneration technology for SMA asphalt pavement
Moreover, expensive modified asphalt and high-quality aggregates are often used in SMA asphalt mixtures. Directly discarding them by milling and planing during maintenance will not only cause huge economic losses, but also cause environmental pollution. Therefore, it is important to study the regeneration of SMA pavements. appears to be particularly important

Method used

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  • SMA (styrene maleic anhydride) on-site thermal regenerated asphalt mixture
  • SMA (styrene maleic anhydride) on-site thermal regenerated asphalt mixture
  • SMA (styrene maleic anhydride) on-site thermal regenerated asphalt mixture

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Composition of SMA recycled asphalt mixture (parts by weight):

[0014] 1. Recycled old materials: 950 parts of RAP material (SMA asphalt pavement milling material) (about 5.8% asphalt ratio), 0.52 parts of asphalt rejuvenator (Tianke SZS rejuvenator) (addition ratio depends on the aging degree of asphalt in RAP material) , up to 1% by weight of bitumen in the RAP material);

[0015] 2. Newly added asphalt mixture: 20 parts of 1# material, 20 parts of 2# material, 5 parts of 4# material, 5 parts of mineral powder, 2.9 parts of SBS modified asphalt, and 0.15 parts of lignin fiber.

[0016] In-house preparation process:

[0017] 1) Mix the newly added asphalt mixture indoors, and put it in an oven at 165°C to keep warm after mixing;

[0018] 2) Mix the dispersed RAP evenly at a temperature of 135°C, then add asphalt regenerant and mix for 30s;

[0019] 3) Add SBS modified asphalt to RAP and mix for 30s;

[0020] 4) Add the new asphalt mixture that has been mixed in th...

Embodiment 2

[0025] Composition of SMA recycled asphalt mixture (parts by weight):

[0026] 1. Recycled old materials: 850 parts of RAP (SMA asphalt pavement milling material) (asphalt ratio 5.8%), newly added SBS modified asphalt 0.85 parts (the addition amount is determined according to the ratio of asphalt in the RAP material, so that the asphalt in the recycled old material ratio between 5.8% and 6.0%);

[0027] 2. Newly added asphalt mixture: 60 parts of 1# material, 60 parts of 2# material, 15 parts of 4# material, 15 parts of mineral powder, 8.85 parts of SBS modified asphalt, and 0.45 parts of lignin fiber.

[0028] The indoor preparation process is the same as in Example 1, and the mineral material gradation of SMA on-site thermally recycled asphalt mixture is shown in Table 2

[0029] Table 2 Gradation composition of mineral materials

[0030]

Embodiment 3

[0032] Composition of SMA recycled asphalt mixture (parts by weight):

[0033] 1. Recycled old materials: 900 parts of RAP (SMA asphalt pavement milling material) (asphalt ratio 5.8%), 1.8 parts of SBS modified asphalt;

[0034] 2. Newly added asphalt mixture: 50 parts of 1# material, 30 parts of 2# material, 10 parts of 4# material, 10 parts of mineral powder, 6.0 parts of SBS modified asphalt, and 0.3 parts of lignin fiber.

[0035] The indoor preparation process is the same as in Example 1, and the mineral material gradation of SMA on-site thermally recycled asphalt mixture is shown in Table 3.

[0036] Table 3 Grading composition of mineral materials

[0037]

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Abstract

The invention discloses an SMA (styrene maleic anhydride) on-site thermal regenerated asphalt mixture and a preparation method thereof. Raw materials of the SMA on-site thermal regenerated asphalt mixture adopt SMA asphalt pavement milling and planning materials and comprise a regenerated old material and newly added asphalt mixture as well as an additive, wherein the regenerated old material adopts the SMA asphalt pavement milling and planning materials; the additive is SBS (styrene butadiene styrene) modified asphalt, an asphalt regenerating agent or a mixture of SBS modified asphalt and the asphalt regenerating agent; and the newly added asphalt mixture comprises SBS modified asphalt, cellulose fibers and mineral aggregates. According to the preparation method, the SMA asphalt pavement milling and planning materials are taken as raw materials, resource is saved, and environmental pollution is avoided; and the prepared mixture can be applied to an SMA asphalt pavement again, each technical requirement can be met, and preparation cost is reduced.

Description

technical field [0001] The invention relates to an asphalt recycled material, in particular to a recycled mixture of SMA asphalt pavement. Background technique [0002] With the rapid growth of my country's national economy and the rapid development of high-grade highway construction, SMA asphalt pavement gradually occupies a large proportion in the upper structure of expressways due to its excellent road performance. However, due to the sharp increase in traffic volume and the frequent occurrence of overweight and overloading, as well as the increase in the service life of the pavement, various forms of disease continue to appear on the asphalt pavement, and it is facing the severe test of large-scale maintenance. At present, for base asphalt and ordinary hot mix asphalt mixture, the use of regeneration technology can reduce waste and save costs. However, there is no relevant research on regeneration technology for SMA asphalt pavement. Moreover, expensive modified as...

Claims

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Application Information

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IPC IPC(8): C04B26/26C04B20/00
Inventor 李锋张志祥严金海丁武洋朱浩然卢勇王立诚王文峰韩鹏
Owner JSTI GRP CO LTD
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