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Plant-mixed hot asphalt mixture and preparation method thereof

A technology for mixture and hot asphalt, applied in the field of factory-mixed hot asphalt mixture and its preparation, can solve the problems of large acid-base difference, reduced service life and easy occurrence of cracks in crushed natural sand and gravel aggregates, and is suitable for large-scale Chemical production, long service life, and the effect of improving aging resistance

Inactive Publication Date: 2020-10-09
上海佳砼新材料科技发展有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In the above-mentioned patents, all crushed natural sand and gravel materials are used as the main raw material components of hydraulic asphalt concrete to prepare hydraulic asphalt concrete with crushed natural sand and gravel materials, which can meet the performance of hydraulic asphalt concrete and reduce engineering costs. Therefore, the crushed natural sand and gravel The acid-base difference of the aggregate is large, which leads to poor bonding among the raw materials of its components. When the broken natural sand and gravel hydraulic asphalt concrete is under high pressure during use, cracks are prone to appear, which in turn leads to its The service life is greatly reduced, therefore, a new solution needs to be proposed to solve the above problems

Method used

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  • Plant-mixed hot asphalt mixture and preparation method thereof
  • Plant-mixed hot asphalt mixture and preparation method thereof
  • Plant-mixed hot asphalt mixture and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0047] Embodiment 1: A kind of factory-mixed hot asphalt mixture, each component and its corresponding parts by weight are as shown in Table 1, such as figure 1 , and prepared by the following steps:

[0048] S1, add the recycled mixed asphalt old material, new aggregate and mineral powder into the drying barrel, and stir at 1000rpm and 80°C for 60min to obtain the mixture;

[0049] S2, add the dried mixture into the mixing tank, heat 1 / 2 of the asphalt to 150°C and add it into the mixing tank, and stir at 1200rpm for 10min;

[0050] S3, add the regenerant into the mixing tank, continue stirring at 800rpm for 10 minutes, then add the remaining asphalt, and continue stirring at 600rpm for 15 minutes to obtain the plant-mixed hot asphalt mixture.

[0051] The regenerated mixed asphalt old material in this embodiment is composed of old asphalt pavement materials with particle sizes ranging from 0 to 10 mm and 10 to 31.5 mm in a weight ratio of 0.8:1; the filler is silicon carbid...

Embodiment 2-6

[0053] Example 2-6: A plant-mixed hot asphalt mixture, the difference from Example 1 is that each component and its corresponding parts by weight are shown in Table 1.

[0054] Each component and parts by weight thereof in table 1 embodiment 1-6

[0055]

Embodiment 7

[0056] Embodiment 7: A factory-mixed hot asphalt mixture, which is different from Embodiment 1 in that it is prepared through the following steps:

[0057] S1, add the recycled mixed asphalt old material, new aggregate and mineral powder into the drying barrel, and stir at 1350rpm and 100°C for 45min to obtain the mixture;

[0058] S2, add the dried mixture into the mixing tank, heat 2 / 3 of the asphalt to 160°C and add it into the mixing tank, and stir at 1350rpm for 7.5min;

[0059] S3, add the regenerant into the mixing tank, continue to stir at 1000rpm for 7.5min, then add the remaining asphalt, continue to stir at 700rpm for 12.5min, and get the plant-mixed hot asphalt mixture.

[0060] The regenerated mixed asphalt old material in this example is composed of old asphalt pavement materials with a particle size range of 0-10mm and 10-31.5mm in a weight ratio of 1:1; the filler is silicon carbide and glass in a weight ratio of 1:1 Mixture of microbeads.

[0061] The regene...

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Abstract

The invention discloses a plant-mixed hot asphalt mixture and a preparation method thereof, and relates to the technical field of recycled asphalt processing. The plant-mixed hot asphalt mixture is prepared from the following components in parts by weight: 40 to 60 parts of recycled mixed asphalt old material; 30 to 50 parts of a new aggregate; 3-5 parts of asphalt; 1-3 parts of mineral powder; 0.1 to 0.5 part of a regenerant; 0.5-1 part of filler. The preparation method comprises the following steps: S1, adding the recycled mixed asphalt old material, the new aggregate and the mineral powderinto a drying barrel, and uniformly stirring to obtain a mixture; S2, adding the dried mixture into a stirring cylinder, heating 1 / 2-2 / 3 of asphalt to 150-170 DEG C, adding the asphalt into the stirring cylinder, and uniformly stirring; and S3, adding the regenerant into the stirring cylinder, uniformly stirring, adding the remaining asphalt, and uniformly stirring to obtain the plant-mixed hot asphalt mixture. The asphalt mixture prepared by the preparation method has the advantages of higher structural strength, longer service life and good pavement performance.

Description

technical field [0001] The invention relates to the technical field of recycled asphalt processing, and more specifically relates to a plant-mixed hot asphalt mixture and a preparation method thereof. Background technique [0002] Factory-mixed hot recycling technology refers to transporting recycled asphalt pavement (RAP) to the asphalt mixing plant, crushing, screening, and mixing with new aggregate, new asphalt, regenerant (if necessary), etc. in a certain proportion. The technology of paving pavement with hot mixed recycled mixture. [0003] As an environmentally friendly technology that can effectively consume waste asphalt mixture, plant-mix heat regeneration has been widely used in major and medium highway repair projects. Numerous successful experiences at home and abroad show that under the premise of reasonable mix ratio design and scientific construction, the technical indicators of factory-mixed hot recycled asphalt mixture can reach or even exceed that of ordin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/26C04B24/00C04B111/20C04B18/16
CPCC04B26/26C04B40/0039C04B2111/0075C04B2111/20C04B2201/50C04B18/16C04B18/141C04B14/14C04B14/28C04B14/324C04B2103/30C04B2103/608C04B2103/605C04B24/00C04B22/00C04B14/22C04B18/146Y02W30/91
Inventor 袁明杰
Owner 上海佳砼新材料科技发展有限公司
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