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Modified asphalt, preparation and applications thereof

A technology of modified asphalt and asphalt, which is applied in the field of asphalt modifiers, can solve the problems of little spalling and looseness, and achieve excellent adhesion performance, high Brookfield viscosity and rebound rate, excellent high temperature performance and The effect of adhesion properties

Inactive Publication Date: 2018-02-23
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are only a few studies on porous asphalt mixtures that propose the addition of a small amount of fillers, but there are very few studies on the effects of different types of fillers and dosages on the anti-flying spalling of porous asphalt mixtures, especially In terms of the application of modified asphalt, the existing modified asphalt is easy to loosen when used on porous pavement

Method used

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  • Modified asphalt, preparation and applications thereof
  • Modified asphalt, preparation and applications thereof
  • Modified asphalt, preparation and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The modified asphalt mortar was prepared according to 1 mass part of domestic high-viscosity asphalt and 0.3 mass part of red mud. The specific preparation and application steps are as follows:

[0041] a) Heat the high-viscosity asphalt to 185°C. The original asphalt used in this study is high-viscosity asphalt, so it is necessary to ensure a higher temperature during the preparation and testing of the mortar, which is set at 185°C.

[0042] b) Heat the red mud in an oven at 180°C for 60±5 minutes to ensure that the filler is dry and at the same time close to the heating temperature of the asphalt.

[0043] c) Divide the filler into three parts, and add equal amounts to the asphalt. After adding the filler for the first time, stir it thoroughly with a glass rod, then turn on the asphalt shearer, and set the shear rate of the instrument to 4000r / min. After 5 minutes, add the second part of filler, continue to cut for 5 minutes, then add the third part of filler, and the...

Embodiment 2

[0046] The same preparation method as in Example 1 was adopted, except that: 1 mass part of domestic high-viscosity asphalt and 0.6 mass part of red mud were used to prepare modified asphalt mortar.

Embodiment 3

[0048] The same preparation method as in Example 1 was adopted, except that: 1 mass part of domestic high-viscosity asphalt and 0.9 mass part of red mud were used to prepare modified asphalt mortar.

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Abstract

The invention relates to modified asphalt, preparation and applications thereof. The modified asphalt comprises asphalt and a filler, wherein the asphalt is high-viscosity asphalt, the filler comprises red mud, a weight ratio of the high-viscosity asphalt to the red mud is 1:x, and x is more than 0 and is less than or equal to 0.9. The preparation method comprises: adding a filler being subjectedto high-temperature drying into molten high-viscosity asphalt in three times so as to pave a porous asphalt pavement. Compared to the modified asphalt, the modified asphalt of the present invention has excellent high-temperature performance and excellent adhesion, such that the modified asphalt of the present invention can be well used for traditional compact asphalt pavements with characteristicsof heavy traffic, high temperature and serious traffic drainage and easily-loose porous asphalt pavements; and the modified asphalt of the present invention has high Brookfield viscosity, high rutting factor and high resilience rate compared to the ore powder-doped modified asphalt, and further has relatively good high-temperature performance and relatively good resilience.

Description

technical field [0001] The invention relates to the technical field of asphalt modifiers, in particular to a modified asphalt and its preparation and application. Background technique [0002] Due to the large porosity of the porous asphalt mixture, and most of the stone-stone point contact inside the mixture, under the combined effect of external environmental factors and vehicle loads, the mixture is very easy to loose and peel off, and then gradually develop into More serious pavement damage. In the early stage of the development of porous asphalt pavement, in order to pursue the excellent functionality (noise reduction, drainage, anti-skid, etc.) brought by the large porosity, the amount of mineral powder and other fillers is usually very small, or even no filler is added. However, a large number of existing studies have shown that the asphalt mortar formed by filler and asphalt plays a vital role in the mixture, especially the adhesion of asphalt mortar. At present, t...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08K11/00C08K3/26E01C7/18
CPCC08K3/26C08K11/005C08K2003/265C08L2201/08E01C7/182C08L95/00
Inventor 李辉张恒基唐峰王寒冰梁霄
Owner TONGJI UNIV
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