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Phase-change temperature self-adjusting asphalt mixture for road and preparation method of phase-change temperature self-adjusting asphalt mixture

A technology of asphalt mixture and phase change temperature, which is applied in the field of asphalt mixture, can solve problems such as rutting, reduce road performance and service quality of the road surface, and achieve the effect of wide application prospects, low cost, and no rutting

Pending Publication Date: 2022-02-08
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Asphalt pavement is a kind of black pavement, and its infrared reflectivity is only 0.05~0.15. In the high temperature environment in summer, the ambient temperature can generally reach 30°C, and even in some areas the highest can reach 40°C. It has a high absorption rate, and the surface temperature can

Method used

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  • Phase-change temperature self-adjusting asphalt mixture for road and preparation method of phase-change temperature self-adjusting asphalt mixture
  • Phase-change temperature self-adjusting asphalt mixture for road and preparation method of phase-change temperature self-adjusting asphalt mixture
  • Phase-change temperature self-adjusting asphalt mixture for road and preparation method of phase-change temperature self-adjusting asphalt mixture

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0038] Example 1

[0039] (1) The aggregates and mineral powders were dried at 105 ° C for 5 h, respectively, and the AH-70 asphalt and φ101.6 mm × 63.5mm cylindrical molding die were heated at 165 ° C for 2 h.

[0040] (2) The stirring pan was added to 165 ° C, and 108.3 parts of the drying collector was stirred, and then 5.2 parts of dried AH-70 asphalt mixing 90s;

[0041] (3) Finally, 0.3 parts of the composite phase change material and 6.2 parts of dried mineral powder were added, and the stirring was continued to obtain a road phase change temperature self-adjusted asphalt mixture. Place the asphalt mixture into the molding mold, and prepare a standard Marshall test piece according to the "Highway Engineering Asphalt and Asphalt Mixed Test Procedures" JTG E20-2011 T0702-2011 Asphalt Mix Test Sub-Making Method (Hits) Magnography figure 2 .

[0042] Test 1: Outdoor cooling test

[0043]The passage from the adjustment phase transition temperature of asphalt mix and the common c...

Example Embodiment

[0053] Example 2

[0054] (1) the aggregate and mineral filler are dried for 6h at 100 ℃, the AH-70 asphalt φ101.6mm × 63.5mm cylinder and mold are heated for 2h at 165 deg.] C;

[0055] (2) the mixing pot was raised to 165 ℃, was added 107.5 parts of the current collector and drying the material was stirred for 90s, AH-70 was added 6 parts of the dried pitch was stirred 90s;

[0056] (3) Finally, 0.42 parts of mineral powder composite phase change material and 6.5 parts by drying, stirring was continued for 90s, to give a phase transition temperature from road regulation asphalt, into the forming mold, and press the "road asphalt and asphalt mixture test procedures "standard Marshall specimens prepared in JTG E20-2011 T0702-2011 asphalt specimen manufacturing method (compaction process).

Example Embodiment

[0057] Example 3

[0058] (1) the aggregate and mineral filler are dried 4h at 110 ℃, the AH-70 asphalt φ101.6mm × 63.5mm cylinder and mold are heated for 2h at 165 deg.] C;

[0059] (2) the mixing pot was raised to 165 ℃, was added 108.6 parts of the current collector and drying the material was stirred for 90s, AH-70 asphalt was added 4.8 parts by drying after stirring 90s;

[0060] (3) Finally, 0.6 parts of mineral powder composite phase change material and 5.9 parts by drying, stirring was continued for 90s, to give a phase transition temperature from road regulation asphalt, into the forming mold, and press the "road asphalt and asphalt mixture test procedures "standard Marshall specimens prepared in JTG E20-2011 T0702-2011 asphalt specimen manufacturing method (compaction process).

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Abstract

The invention discloses a phase-change temperature self-adjusting asphalt mixture for a road and a preparation method of the phase-change temperature self-adjusting asphalt mixture, and belongs to the technical field of asphalt mixtures. The phase-change temperature self-adjusting asphalt mixture for the road is prepared from the following raw materials in parts by weight: 4.8 to 6 parts of asphalt, 107.5 to 108.6 parts of aggregate, 0.3 to 0.6 part of a composite phase change material and 5.9 to 6.5 parts of mineral powder. The aggregate, the mineral powder and the asphalt are respectively dried, the aggregate, the asphalt, the mineral powder and the composite phase-change material are added into a stirring pot, and uniform stirring is conducted to obtain the phase-change temperature self-adjusting asphalt mixture for the road. The phase-change temperature self-adjusting asphalt mixture for the road is used for actively adjusting the temperature of the road surface, and an indoor cooling test and an outdoor cooling test show that the mixture has a good cooling effect and good road performance, is suitable for expressways and urban roads, and has a wide application prospect.

Description

technical field [0001] The invention relates to the technical field of asphalt mixture, in particular to a road-use asphalt mixture with self-regulating phase change temperature and a preparation method thereof. Background technique [0002] my country's expressway industry has entered a stable stage of development, and the expressway network has been formed. After large-scale highway construction, the mileage of highways can meet the needs of economic development and travel. The development of highway transportation has transitioned from the era of large-scale road construction to the era of infrastructure maintenance. Highway maintenance has become the primary task of highway transportation development. Asphalt pavement is widely used in highway engineering construction due to its good driving comfort, low noise, and convenient construction and maintenance, and has become the most important form of paved roads in my country. More than 90% of roads are asphalt pavement. ...

Claims

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Application Information

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IPC IPC(8): C04B26/26C04B24/36C09K5/06
CPCC04B26/26C04B40/0042C09K5/06C04B2111/0075C04B14/28C04B14/06C04B2103/0071C04B24/36C04B14/024C04B24/2611C04B24/2688
Inventor 张金喜董子震陈超张阳光
Owner BEIJING UNIV OF TECH
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