Foamed warm mix asphalt mixture and preparation method thereof

A technology of warm-mix asphalt and foamed asphalt, which is applied in the field of foamed warm-mix asphalt mixture and its preparation, to achieve the effects of reducing carbon dioxide emissions, improving laying efficiency, and prolonging the construction period

Inactive Publication Date: 2013-05-15
栾海
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And hot mix asphalt requires that the construction environment temperature must be higher than 10°C, so in plateau areas or northern my country, construction cannot be done in winter

Method used

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  • Foamed warm mix asphalt mixture and preparation method thereof
  • Foamed warm mix asphalt mixture and preparation method thereof
  • Foamed warm mix asphalt mixture and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Material composition:

[0060] Aggregate: 0.895 tons;

[0061] Mineral powder: 0.105 tons;

[0062] Rubber modified asphalt: 0.059 tons;

[0063] Water: 0.0012 tons;

[0064] Wood fiber: 0.0024 tons.

[0065] The specific steps for preparing foamed asphalt warm mix are:

[0066] Heat the aggregate and mineral powder to 130°C respectively;

[0067] Heat the rubber-modified asphalt to 175°C;

[0068] Use the foaming device to inject water vapor into the asphalt to form foamed asphalt;

[0069] Finally, mix the aggregate and wood fiber in the mixing pot for 15 seconds, spray the foamed asphalt into the mixing pot and mix for 10 seconds, add mineral powder and mix for 30 seconds; prepare foamy warm asphalt mixture.

[0070] Obviously, the proportions of the above-mentioned components can be appropriately adjusted according to specific needs, and the above-mentioned component proportions cannot be used as the final basis. The performance of the foamed asphalt warm mix...

Embodiment 2

[0075] Material composition:

[0076] Aggregate: 0.937 tons;

[0077] Mineral powder: 0.063 tons;

[0078] Asphalt: 0.046 tons;

[0079] Water: 0.00092 tons.

[0080] The specific steps for preparing foamed asphalt warm mix are:

[0081] Heat the aggregate and mineral powder to 130°C respectively;

[0082] Heat the asphalt to 170°C;

[0083] Use the foaming device to inject water vapor into the asphalt to form foamed asphalt;

[0084] Finally, mix the aggregate evenly in the mixing pot, spray the foamed asphalt into the mixing pot and mix for 2 minutes, then add the heated mineral powder and mix for 2 minutes to prepare foamy warm asphalt mixture.

[0085]

[0086] Obviously, the proportions of the above-mentioned components can be adjusted appropriately according to specific needs, and the above-mentioned component proportions cannot be used as the final basis. The properties of the foamed asphalt warm mix mixture in the present invention are shown in Table 2.

[00...

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Abstract

The invention discloses a foamed warm mix asphalt mixture and a preparation method thereof. The foamed warm mix asphalt mixture is obtained by treating 2-8.5% of foamed asphalt, 2-90% of novel aggregate (or 6-90% of old asphalt pavement material) and 1-15% of mineral powder according to a special process. Asphalt is foamed through the special process, the volume of the foamed asphalt is increased by above 10 times, and the viscosity is remarkably reduced. Therefore, the mixture can be uniformly mixed at a lower temperature of 100-150 DEG C, so that asphalt fume in the production process is avoided, and the energy consumption for preparing asphalt mixture is lowered. The asphalt mixture is completely attached to the surface of the building stones to form asphalt films. After the water is volatized, the asphalt mixture with better performance is formed. Compared with conventional asphalt mixture, the foamed warm mix asphalt mixture has the advantages that the mixing temperature can be reduced by 30-60 DEG C, and the paving difficulty is reduced.

Description

technical field [0001] The invention relates to the field of road traffic building materials, in particular to a foam warm asphalt mixture and a preparation method thereof. Background technique [0002] At present, the asphalt pavement in road construction basically adopts the traditional hot mix asphalt mixture HMA (Hot Mixture Asphalt: hot mix asphalt mixture). HMA is a hot-mixed asphalt mixture. It heats the asphalt from room temperature to about 140-180 ℃, heats the mineral material from room temperature to 160-200 ℃, and then mixes the asphalt and mineral material at high temperature. , the HMA temperature after stirring is not lower than 150°C. The temperature during paving and rolling shall not be lower than 120°C. Heating asphalt and mineral materials to such a high temperature not only consumes a lot of energy, but also emits a lot of waste gas and dust during production and construction, which seriously affects the quality of the surrounding environment and the h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/26
CPCY02A30/30
Inventor 栾海纪青山霍玉霞卢志超王玉娟
Owner 栾海
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