Modified asphalt mixture and preparation method thereof

A modified asphalt and mixture technology, applied in the field of asphalt mixture, can solve problems such as difficult formation of exfoliated montmorillonite structure, improve rheological properties, anti-aging performance, better compatibility, and convenient application Effect

Active Publication Date: 2016-05-18
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the organic montmorillonite modifiers prepared by these methods all need a higher shear rate and a longer shear time to fully and evenly disperse the montmorillonite in the asphalt, and when the organic montmorillonite When the addition amount increases, it is difficult to form a stable exfoliated montmorillonite structure

Method used

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  • Modified asphalt mixture and preparation method thereof
  • Modified asphalt mixture and preparation method thereof

Examples

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Effect test

Embodiment 1

[0044] The modified asphalt mixture of this embodiment is made of the following raw materials: 100 kg of mineral aggregate, 3.5 kg of asphalt, 0.1 kg of organic montmorillonite, and the asphalt is ordinary 70# asphalt.

[0045] Organic montmorillonite was prepared as follows:

[0046] Under the condition of high-speed stirring (1500r / min), quickly add montmorillonite to polyphosphoric acid ethanol solution, keep stirring for 20min, and filter with suction. Add the filter cake to the dodecylamine ethanol solution, stir for 1 h after the addition is complete, and filter with suction. After washing and vacuum drying, the organic montmorillonite with good particle dispersion, fluffy and no grinding is finally obtained. The weight content of each substance is as follows: montmorillonite: 25%; polyphosphoric acid: 25%; dodecylamine: 50%.

[0047] The preparation method of modified asphalt mixture in the present embodiment is:

[0048] (1) The organic montmorillonite was added to ...

Embodiment 2

[0052] The modified asphalt mixture of this embodiment is made of the following raw materials: 100 kg of mineral aggregate, 5 kg of asphalt, 0.5 kg of organic montmorillonite, and the asphalt is ordinary 70# asphalt.

[0053] Preparation of organic montmorillonite:

[0054] Under the condition of high-speed stirring (1500r / min), quickly add montmorillonite to polyphosphoric acid ethanol solution, keep stirring for 20min, and filter with suction. Add the filter cake to the cetylamine ethanol solution, stir for 1 hour after the addition is complete, and filter with suction. After washing and vacuum drying, the organic montmorillonite with good particle dispersion, fluffy and no grinding is finally obtained. The weight content of each substance is as follows: montmorillonite: 20%; polyphosphoric acid: 40%; cetylamine: 40%.

[0055] The preparation method of modified asphalt mixture in the present embodiment is:

[0056] (1) The organic montmorillonite was added to the asphalt at...

Embodiment 3

[0061] The modified asphalt mixture of this embodiment is made of the following raw materials: 100 kg of mineral aggregate, 4 kg of asphalt, 1 kg of organic montmorillonite, and the asphalt is ordinary 70# asphalt.

[0062] Preparation of organic montmorillonite:

[0063] Under the condition of high-speed stirring (1500r / min), quickly add montmorillonite to polyphosphoric acid ethanol solution, keep stirring for 20min, and filter with suction. Add the filter cake to the stearylamine ethanol solution, stir for 1 hour after the addition is complete, and filter with suction. After washing and vacuum drying, the organic montmorillonite with good particle dispersion, fluffy and no grinding is finally obtained. The weight content of each substance is as follows: montmorillonite: 15%; polyphosphoric acid: 35%; octadecylamine: 50%.

[0064] The preparation method of modified asphalt mixture in the present embodiment is:

[0065] (1) Heat the aggregate in the mineral material to 180...

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Abstract

The invention provides a modified asphalt mixture which includes 100 parts of a mineral aggregate, 3-6 parts of asphalt, and 0.05-1 part of organized montmorillonoid. The organized montmorillonoid is an organized montmorillonoid road asphalt modifier having a core-shell structure and being prepared in a manner of modifying the surface of micron-scale montmorillonite granules and coating the micron-scale montmorillonite granules by ammonium polyphosphate with montmorillonoid, polyphosphoric acid and amine compounds as raw materials, wherein the core-shell structure improves the dispersibility and uniformity of the montmorillonite inorganic powder granules in asphalt and greatly improves the rheological property and anti-aging performance of the asphalt. The modified asphalt mixture has excellent anti-rutting performance, low-temperature anti-cracking performance and anti-aging performance.

Description

technical field [0001] The invention belongs to the technical field of asphalt mixture, and in particular relates to a modified asphalt mixture and a preparation method thereof. Background technique [0002] Asphalt pavement has become the preferred pavement type for high-grade highways in various countries because of its excellent road performance. However, asphalt is an organic material, which is very susceptible to thermal oxygen and photo-oxidative aging under the influence of high temperature and ultraviolet radiation, which makes the asphalt hard and brittle, resulting in cracks, ruts, potholes, spalling and other diseases on the asphalt pavement. The disease seriously affects the road performance and service life of asphalt. [0003] In order to reduce the early damage of the pavement, researchers have been developing and designing new materials and pavement structures. For example, the modification measures such as polymer modification, physical modification and pro...

Claims

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Application Information

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IPC IPC(8): C04B26/26C04B18/12
CPCY02W30/91
Inventor 宣根海徐青柏陈杰石君章宁爱民李志军
Owner CHINA PETROLEUM & CHEM CORP
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