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Normal temperature regeneration modifier for waste asphalt mixture and preparation method thereof

A waste asphalt and mixture technology, which is applied in the field of waste asphalt mixture normal temperature regeneration modifier and its preparation, can solve the problems of restricting the secondary utilization of RAP, restricting the application of technology, and high cost of equipment transformation, etc., and achieve good performance, The effect of high RAP blending ratio and low production temperature

Active Publication Date: 2020-04-07
CHINA ACAD OF TRANSPORTATION SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the best effect on the regeneration of asphalt pavement is the factory-mixed heat regeneration technology, but because this technology requires the asphalt mixture to be mixed at a higher temperature, the heating temperature of RAP must be above 160°C, and it is necessary to add a special heating drum and equipment modification The cost is high. In addition, the utilization rate of RAP in the existing plant-mixed heat regeneration technology does not exceed 30%, which seriously restricts the application of this technology and also limits the secondary utilization of RAP.

Method used

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  • Normal temperature regeneration modifier for waste asphalt mixture and preparation method thereof
  • Normal temperature regeneration modifier for waste asphalt mixture and preparation method thereof
  • Normal temperature regeneration modifier for waste asphalt mixture and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Preparation formula of waste asphalt mixture normal temperature regeneration modifier:

[0033]

[0034] Preparation:

[0035] 1) Add a certain weight portion of polymer SBS4303, SBR1502 and light distillate oil (gasoline, diesel) mixture into the stirring tank, stir and dissolve at 25°C, and stir and dissolve for 48 hours;

[0036] 2) Add naphthenic rubber oil KN4010 (naphthenic content > 40%, kinematic viscosity 10mm) into the stirred tank in step 1) 2 / s), cross-linking agent (sulfur), surfactant (nonionic surfactant AC-25), and continue to stir for 40min, and the obtained liquid mixture is the normal temperature regeneration modifier of the waste asphalt mixture.

Embodiment 2

[0038] Preparation formula of waste asphalt mixture normal temperature regeneration modifier:

[0039]

[0040] Preparation:

[0041] Refer to the method of Example 1 to prepare the waste asphalt mixture normal temperature regeneration modifier of this example, the difference is that the stirring and dissolving time of step 1) is 24 hours; the stirring time of step 2) is 30 minutes.

Embodiment 3

[0043] Preparation formula of waste asphalt mixture normal temperature regeneration modifier:

[0044]

[0045] Preparation:

[0046] With reference to the method of Example 1, the waste and old asphalt mixture normal temperature regeneration modifier is prepared, the difference is that step 1) is omitted, and light distillates (kerosene and gasoline), naphthenic rubber oil KN4010 (naphthene content > 40%, kinematic Viscosity 10mm 2 / s), crosslinking agent (sulfur), surfactant (nonionic surfactant AC-25) are added in the stirring tank, stirring temperature is 25 ℃, stirring 20min, the obtained liquid mixture is the waste asphalt mixture Normal temperature regeneration modifier.

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Abstract

The invention discloses a waste asphalt mixture normal-temperature regeneration modifying agent and a preparation method thereof. Particularly, the waste asphalt mixture normal-temperature regeneration modifying agent comprises the following components in parts by weight: 0-30 part of rubber oil, 30-60 parts of light distillates, 5-10 parts of a polymer, 2-5 parts of a crosslinking agent and 1-5 parts of a surfactant. The regeneration modifying agent is used for producing a regenerative asphalt mixture; the RAP blending rate is high; the blending temperature is low; and the pavement performance of the regenerative asphalt mixture is good.

Description

technical field [0001] The invention relates to the field of road engineering materials, in particular to a normal-temperature regeneration modifier for waste asphalt mixture and a preparation method thereof. Background technique [0002] With the vigorous development of highway construction in my country, the traffic volume continues to grow. Many asphalt pavements built earlier in our country have been overwhelmed by the heavy traffic pressure. According to the design life and actual use of these pavements, many high-grade highways have been Entering or approaching the overhaul period. It is estimated that about 12% of asphalt pavement will need to be repaired every year from now on. At the same time, due to the continuous improvement of the high-grade kilometer capacity requirements of various resource-rich provinces, my country has successively carried out a certain number of high-grade highway reconstruction and widening projects in recent years. [0003] Whether it is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L91/00C08L53/02C08L9/06C08K3/06C04B26/26
CPCC04B26/26C08L91/00C08L2205/025C08L2205/03C08L2205/035C08L53/02C08L9/06C08K3/06
Inventor 赵蔚郭朝阳魏道新李亚非王洪李振勇唐敬东
Owner CHINA ACAD OF TRANSPORTATION SCI
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