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Recycled asphalt mixture and preparation method thereof

A technology for old asphalt mixture and recycled asphalt, which is applied in the field of recycled asphalt mixture and its preparation, can solve the problems of high addition ratio of old asphalt mixture and decreased performance, etc.

Active Publication Date: 2021-02-26
北京路德永泰环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a recycled asphalt mixture and a preparation method thereof to solve the problem in the prior art that the performance of the old asphalt mixture will decline when the proportion of the old asphalt mixture is added

Method used

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  • Recycled asphalt mixture and preparation method thereof
  • Recycled asphalt mixture and preparation method thereof
  • Recycled asphalt mixture and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Regenerated asphalt mixture, in parts by weight, includes 65 parts of new aggregate, 35 parts of old asphalt mixture, 2 parts of mineral powder, 5 parts of new asphalt and 1.05 parts of asphalt regeneration agent, wherein the new aggregate is graded basalt or Limestone material; old asphalt mixture is graded old asphalt mixture; new asphalt is base asphalt, SBS modified asphalt or rubber asphalt.

[0033] Asphalt rejuvenator, in parts by weight, including 100 parts of softener, 1-5 parts of elastomeric polymer, 15-30 parts of linearized reactive rubber (RR), 0.5-5 parts of surfactant and 0.5-5 parts of anti-stripping agent; the softener is one of soybean oil, dioctyl phthalate, naphthenic oil, reduced three line oil or rich aromatics; the elastomer polymer is one of SBS, SBR, SIS or butadiene rubber The surfactant is one of sodium lauryl sulfonate, glyceryl stearate, polyoxyethylene alkylamine or long-chain fatty alcohol polyoxyethylene ether; the anti-stripping agent i...

Embodiment 2～12

[0055] Embodiment 2~12 and comparative example 1~4:

[0056] The difference from Example 1 is that, as shown in Table 3 below, the content of the components is different from the number of the asphalt regenerant used.

[0057] Table 3 is the composition list of Examples 1~12 and Comparative Examples 1~4

[0058] new aggregate old asphalt mixture mineral powder new asphalt asphalt regenerant Example 1 65 35 2 5 1.05#1 Example 2 65 35 2 5 1.05#2 Example 3 65 35 2 5 1.05#3 Example 4 65 35 2 5 1.05#4 Example 5 65 35 2 5 1.05#5 Example 6 65 35 2 5 1.05#6 Example 7 65 35 2 5 1.05#7 Example 8 65 35 2 5 1.05#8 Example 9 65 35 2 5 1.05#9 Example 10 75 25 1 7 0.75#1 Example 11 55 45 3 4 1.35#1 Example 12 55 45 2 6 2.25#1 Comparative example 1 65 35 2 5 1.05#10 Comparative example 2 65 35 2 5 1.05#11 Comparative example 3 65 ...

Embodiment 13

[0060] The difference from Example 1 is that the step S3 of the asphalt regenerated agent and the step S3 of the regenerated asphalt mixture all adopt special mixing equipment, combined with figure 1 with figure 2 As shown, the special mixing equipment includes a horizontally fixed mixing drum, the left end of the mixing drum is provided with an inlet, and the right end is provided with an outlet. The stirring drum is connected with a stirring shaft 10 in rotation, wherein the stirring shaft 10 is hollow, and the two sides of the stirring shaft 10 Both ends are connected to pipes through rotary joints, and a number of stirring blades 11 are fixed on the stirring shaft 10. The heating medium (gas, water, liquid metal, etc.) flows through the stirring shaft 10 through the pipes, thereby heating the stirring shaft 10 and the stirring blades 11. A driving mechanism for driving the stirring shaft 10 to rotate is also provided.

[0061] A connecting rod 12 is slidably connected in...

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Abstract

The invention relates to the technical field of recycled asphalt, and particularly discloses a recycled asphalt mixture and a preparation method thereof.The recycled asphalt mixture is prepared from,by weight, 55-75 parts of new aggregate, 25-45 parts of old asphalt mixture, 1-3 parts of mineral powder, 4-7 parts of new asphalt and 0.08-0.56 part of asphalt regenerant; the asphalt regenerant comprises the following components in parts by weight: 100 parts of a softener, 1-5 parts of an elastomeric polymer, 15-30 parts of linearized active rubber, 0.5-5 parts of a surfactant and 0.5-5 parts ofan anti-stripping agent. By the adoption of the technical scheme, the old asphalt mixture can be added in a large proportion, the performance of the pavement asphalt mixture can still be met, and theproblems that in the prior art, pavement compaction is insufficient, and low-temperature embrittlement is likely to happen are solved.

Description

technical field [0001] The invention relates to the technical field of recycled asphalt, in particular to a recycled asphalt mixture and a preparation method thereof. Background technique [0002] Road asphalt is affected by the wheel load and natural factors. After a period of service, the properties of asphalt and aggregate in the road asphalt mixture will undergo physical and chemical changes, and finally manifest as the viscosity of the asphalt in the asphalt mixture increases. Aging and refinement of aggregates. After the asphalt is affected by natural factors in the pavement, the asphalt components will "migrate", that is, the asphaltene will increase accordingly, which will lead to asphalt aging and viscosity increase, resulting in the decline of asphalt performance, and finally the occurrence of pavement diseases. [0003] The recycling of road asphalt and asphalt mixture means that the old asphalt mixture is milled out from the road surface and mixed with regenerat...

Claims

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Application Information

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IPC IPC(8): C04B26/26C04B24/42
CPCC04B26/26C04B40/0039C04B2111/00017C04B14/14C04B14/28C04B18/141C04B24/08C04B24/045C04B24/00C04B24/16C04B24/085C04B24/32C04B24/2652C04B24/124C04B24/121C04B24/42C04B24/18C04B24/26
Inventor 董大伟江宽刘双旺董进学马庆杰颜亮武晋巍
Owner 北京路德永泰环保科技有限公司
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