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Method and device for waste asphalt mixture thermal regenerative heating

一种旧沥青混合料、加热方法的技术，应用在焦油沥青/石油沥青/天然沥青的加工、道路、建筑等方向，能够解决劣化沥青路用性能、环境污染等问题，达到提高路用性能、减少沥青老化量与挥发量、节约能源的效果

Inactive Publication Date: 2012-10-03
苏强
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the above-mentioned thermal regeneration method, the thermal regeneration heating method of the old asphalt mixture is carried out in the drying drum. Since the temperature of the high-temperature flue gas generated by the burner in the drying drum is very high, the old asphalt mixture is mixed with high temperature in the drying drum. When the flue gas contacts and exchanges heat, the asphalt wrapped in the form of a film on the mineral material will be severely aged and a large amount of asphalt volatiles, namely asphalt fume, will be generated. With the aging of asphalt and the volatilization of asphalt fume, the road use of asphalt will be greatly deteriorated. performance, and will cause serious environmental pollution

Method used

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  • Method and device for waste asphalt mixture thermal regenerative heating

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Experimental program
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Embodiment 1

[0030] Such as figure 1 As shown, the old asphalt mixture thermal regeneration heating method of the embodiment of the present invention comprises the following steps:

[0031] Step 101, mixing the old asphalt mixture with hot asphalt; wherein the temperature of the hot asphalt is higher than the temperature of the old asphalt mixture, but not higher than the standard asphalt heating temperature.

[0032] Among them, the standard asphalt heating temperature refers to industry standards such as "People's Republic of China Industry Standard JTG F41-2008 [Technical Specifications for Highway Asphalt Pavement Recycling]" and "People's Republic of China Industry Standard JTG F40-2004 [Technical Specification for Highway Asphalt Pavement Construction]" The asphalt heating temperature determined in the specification, the asphalt heating temperature determined in the above standard is: No. 50 asphalt 160~170°C, No. 70 asphalt 155~165°C, No. 90 asphalt 150~160°C, No. 110 asphalt 145~15...

Embodiment 2

[0046] Mix the old asphalt mixture with hot asphalt at 150-160℃ of equal weight and heat and stir the mixture at the same time. When the temperature of the mixture of old asphalt mixture and asphalt reaches 150-160℃, the old asphalt mixture can be The mixture with asphalt is used as a binder in batch asphalt mixing equipment for the production of recycled asphalt mixture, or in asphalt pavement construction. When the above mixture is used in asphalt pavement construction (adhesive course, permeable course, synchronous gravel seal, etc.), the part with less mineral material and smaller particle size can be used to meet the construction process requirements.

Embodiment 3

[0048]Mix 10 parts by weight of old asphalt mixture with 1 part by weight of 150-160°C hot asphalt and heat and stir the mixture at the same time to keep the temperature of the mixture of old asphalt mixture and asphalt at 150-160°C. The performance index of asphalt does not meet the relevant requirements, and the performance of asphalt in the mixture can be improved by adding asphalt regenerant. At this time, the mixture of old asphalt mixture and hot asphalt can be used as a binder in the process of producing recycled asphalt mixture.

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Abstract

The invention discloses a method for waste asphalt mixture thermal regenerative heating. The method includes that: waste asphalt mixtures and hot asphalt are mixed, wherein the temperature of the hot asphalt is higher than that of the waste asphalt mixtures and is not higher than the heating temperature of standard asphalt; and the waste asphalt mixtures are heated through heat exchange between the hot asphalt and the waste asphalt mixtures. The invention further discloses a device for waste asphalt mixture thermal regenerative heating. The device comprises a heat exchange container for containing mixtures of the waste asphalt mixtures and the hot asphalt, and the waste asphalt mixtures are heated through heat exchange between the hot asphalt and the waste asphalt mixtures, wherein the temperature of the hot asphalt is higher than that of the waste asphalt mixtures and is not higher than the heating temperature of the standard asphalt. The method and the device can reduce the asphalt performance degrading degree of the waste asphalt mixtures in the heating process and improve the pavement performance of the heated waste asphalt mixtures.

Description

technical field [0001] The invention relates to the technical field of road construction, in particular to an old asphalt mixture thermal regeneration heating method and device. Background technique [0002] Thermal regeneration of old asphalt mixture is a commonly used method of asphalt recovery and reuse in road construction. [0003] Most of the existing thermal regeneration of old asphalt mixture adopts the drying cylinder heating method, that is, the old asphalt mixture that has been screened and cold-mixed is transported to the drying cylinder used in conjunction with the gap-type asphalt mixing equipment. The old asphalt mixture and the high-temperature flue gas produced by the burner are heated by convection or convection plus radiation. The heated old asphalt mixture is metered and transported into the mixing pot, and the heated mineral material , new asphalt and mineral powder and other materials are stirred and mixed to become recycled asphalt mixture. In the ab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C19/08E01C19/10
CPCC10C3/007E01C19/1004E01C19/08E01C19/10Y02A30/30E01C21/00
Inventor 苏强
Owner 苏强
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