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Preparation method of high-fatigue-resistance waste PET plastic modified rubber asphalt concrete

A technology of asphalt concrete and modified rubber, applied in the field of asphalt concrete, can solve problems such as insufficient anti-fatigue ability, and achieve the effect of changing acid-base characteristics, being beneficial to environmental protection and alleviating white pollution

Active Publication Date: 2022-07-29
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of this, the present invention aims to provide a method for preparing high-fatigue-resistant waste PET plastic modified rubber asphalt concrete to solve the problem of insufficient fatigue resistance of existing large-volume rubber powder modified asphalt concrete

Method used

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  • Preparation method of high-fatigue-resistance waste PET plastic modified rubber asphalt concrete
  • Preparation method of high-fatigue-resistance waste PET plastic modified rubber asphalt concrete
  • Preparation method of high-fatigue-resistance waste PET plastic modified rubber asphalt concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The waste PET plastic-based additive used in this example is a purified product of ammonia degradation of the waste PET plastic. The preparation method is as follows: after the waste PET plastic is broken into flakes, it is mixed with triethylenetetramine solvent according to the mass ratio of 1:2 , reacted at 150 °C for 2 h, and then immediately poured the reaction product into tap water at room temperature, followed by vacuum filtration, repeated water washing, low-temperature drying at 25 °C-35 °C and mechanical grinding to obtain powdery waste PET plastics base additives.

[0027] The concrete preparation method of the high fatigue-resistant waste PET plastic modified rubber asphalt concrete of the present embodiment is:

[0028] 1) Preheating the rubber powder at 120°C, keeping the temperature for at least 30 minutes, then mixing the above-mentioned rubber powder and base asphalt at 180°C, shearing at 3500 rpm for 1 hour, to obtain tire rubber powder modified aspha...

Embodiment 2

[0042] The difference between this example and Example 1 is that the content of the waste PET plastic-based additive is 2% of the mass of the tire rubber powder modified asphalt.

[0043] According to the "Asphalt and Asphalt Mixture Test Regulations for Highway Engineering" (JTGE20-2011), the rutting test and the stability test were carried out on the high-fatigue-resistant waste PET plastic modified rubber asphalt concrete in this example.

[0044] It can be seen from the test that the rut depth of the high-fatigue waste PET plastic modified rubber asphalt concrete in this example is 3.71mm at 60°C, the Marshall specimen stability is 12.43kN, and the flow value is 25.5mm.

[0045] The indirect tensile fatigue test was carried out on the high-fatigue-resistant waste PET plastic modified rubber asphalt concrete in this example, and the results are shown in Table 3.

[0046] table 3

[0047]

[0048] It can be seen from the above test results that, in comparison with Exampl...

Embodiment 3

[0050] The difference between this example and Example 1 is that the amount of the waste PET plastic-based additive is 3% of the mass of the tire rubber powder modified asphalt.

[0051] According to the "Asphalt and Asphalt Mixture Test Regulations for Highway Engineering" (JTGE20-2011), the rutting test and the stability test were carried out on the high-fatigue-resistant waste PET plastic modified rubber asphalt concrete in this example.

[0052] It can be seen from the test that the rut depth of the high-fatigue waste PET plastic modified rubber asphalt concrete in this example is 3.76mm at 60°C, the Marshall specimen stability is 12.41kN, and the flow value is 24.9mm.

[0053] The indirect tensile fatigue test was carried out on the high-fatigue-resistant waste PET plastic modified rubber asphalt concrete in this example, and the results are shown in Table 4.

[0054] Table 4

[0055]

[0056] It can be seen from the above test results that under the same level of tes...

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Abstract

The invention provides a preparation method of high-fatigue-resistance waste PET (polyethylene terephthalate) plastic modified rubber asphalt concrete, relates to the technical field of asphalt materials, and solves the problem of insufficient fatigue resistance of high-dosage rubber powder modified asphalt concrete in the prior art. According to the preparation method of the high-fatigue-resistance waste PET plastic modified rubber asphalt concrete, charge distribution among asphalt molecules can be effectively improved, so that the prepared modified rubber asphalt has a strong electrostatic force aggregation effect, and the fatigue resistance of the high-fatigue-resistance waste PET plastic modified rubber asphalt concrete is greatly improved. The preparation method is simple in process, small in additive usage amount and low in preparation cost, can effectively improve the anti-fatigue performance of the rubber asphalt, can consume waste plastic bottles, and has remarkable economic benefits, environmental benefits and engineering values.

Description

technical field [0001] The invention relates to the technical field of asphalt concrete, in particular to a preparation method of high fatigue-resistant waste PET plastic modified rubber asphalt concrete. Background technique [0002] Abandoned plastic bottles are a common waste in life, and their amount increases exponentially with population growth and urban development. The stacking of a large number of discarded plastic bottles not only occupies land resources, but also causes huge pollution to soil water quality. Although waste plastic bottles can be recycled through traditional physical methods, such as injection molding, extrusion, etc., they cannot be used to make high-quality plastic products because they cannot be thoroughly cleaned, and some recycled plastics may occur during the recycling process. The degradation reaction reduces its performance and the overall recycling rate is low. [0003] As a polyester polymer, waste PET plastics, in addition to the physic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/26C04B24/12B29B7/00C08J11/28C08L67/02
CPCC04B26/26C04B24/12B29B7/005C08J11/28C08J2367/02C04B2111/00017C04B18/22C04B14/048C04B18/141Y02W30/91
Inventor 徐雄罗艺冷真陈瑞骐陈旭勇吴巧云程书凯
Owner WUHAN INSTITUTE OF TECHNOLOGY
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