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Recycled asphalt mixture and preparation method thereof

A technology for old asphalt mixture and recycled asphalt, applied in the field of recycled asphalt mixture and its preparation, can solve the problems of performance degradation and high addition ratio of old asphalt mixture, reduce surface energy, reduce compaction temperature, and improve water damage resistance. Effect

Active Publication Date: 2022-08-05
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] Recycled asphalt mixture, in parts by weight, comprising 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 rejuvenating 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 regeneration agent, in parts by weight, comprising 100 parts softener, 1-5 parts elastomeric polymer, 15-30 parts linearized reactive rubber (RR), 0.5-5 parts surfactant and 0.5-5 parts anti-stripping wherein the softening agent is one of soybean oil, dioctyl phthalate, naphthenic oil, reduced third-line oil or rich aromatic hydrocarbons; the elastomeric 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-str...

Embodiment 2～12

[0055] Examples 2-12 and Comparative Examples 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 rejuvenating agent used.

[0057] Table 3 is the composition table of Examples 1-12 and Comparative Examples 1-4

[0058] new aggregate old asphalt mixture Mineral powder new asphalt Asphalt regeneration agent 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 Comparativ...

Embodiment 13

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

[0061] A connecting rod 12 is slidably connec...

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Abstract

The invention relates to the technical field of recycled asphalt, and specifically discloses a recycled asphalt mixture and a preparation method thereof. In parts by weight, it comprises 55-75 parts of new aggregate, 25-45 parts of old asphalt mixture, 1-3 parts of mineral powder, 4 to 7 parts of new asphalt, 0.08 to 0.56 parts of asphalt regenerant; the asphalt rejuvenation agent, in parts by weight, includes 100 parts of softener, 1 to 5 parts of elastomeric polymer, 15 to 30 parts of linearized active rubber, 0.5 to 5 parts of surfactant and 0.5 to 5 parts of anti-stripping agent. Using the technical solution in this patent, the old asphalt mixture can be added in a larger proportion, and the performance of the pavement asphalt mixture can still be satisfied, without the problems of insufficient compaction of the pavement and easy brittle cracking at low temperature in the prior art.

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 wheel load and natural factors. After a period of service, the properties of asphalt and aggregate in road asphalt mixture will undergo physical and chemical changes, and eventually the asphalt viscosity in the asphalt mixture will increase. Aging and Aggregate Refinement. After the asphalt is subjected to natural factors in the pavement, it will cause the asphalt components to "migrate", that is, the asphaltene increases accordingly, which leads to the aging of the asphalt, the increase of the viscosity, and the decrease of the asphalt performance, which finally manifests as the occurrence of pavement diseases. [0003] The recycling of road asphalt and asphalt mixture is to mill the old asphalt mixture from the road surface and remix it with regeneran...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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