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Pouring type phase change energy storage asphalt concrete pavement material and preparation method thereof

A technology of asphalt concrete and phase change energy storage, applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve the problems such as the difficulty of mixing phase change materials and asphalt mixture, and achieve the reduction of road temperature damage and selectivity The effect of high and high utilization

Pending Publication Date: 2020-11-13
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of difficulty in mixing phase change materials and asphalt mixture in the prior art, to provide a poured phase change energy storage asphalt concrete pavement material and its preparation method, which has good road performance and Energy storage performance

Method used

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  • Pouring type phase change energy storage asphalt concrete pavement material and preparation method thereof
  • Pouring type phase change energy storage asphalt concrete pavement material and preparation method thereof

Examples

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preparation example Construction

[0030] The preparation method of the poured phase change energy storage asphalt concrete pavement material of the present invention comprises the following steps:

[0031] 1) Preparation of large-void matrix asphalt mixture: select coarse aggregate, fine aggregate, filler and high-viscosity asphalt, and design the mix ratio of large-void asphalt mixture according to the volume method; Heat the filler and filler to 160-175°C, heat the high-viscosity asphalt to 155-165°C; then mix the coarse aggregate, fine aggregate and high-viscosity asphalt according to the design ratio for 60-90s, add filler and continue to mix for 90s, the mixing device The temperature is 165-180°C; after that, the large-void matrix asphalt mixture is obtained by rolling;

[0032] 2) Preparation of resin-based phase change grouting material: Mix epoxy resin, toughening agent, diluent, thermally conductive nylon fiber and nano-cesium tungsten bronze at a speed of 4000-7000rad / min for 10-20min, and then mix w...

Embodiment 1

[0036] Preparation of large void matrix asphalt mixture;

[0037] The mass ratio of coarse aggregate, fine aggregate, filler and high-viscosity asphalt is: 83:11:6:4.1. The gradation composition of the aggregate is shown in Table 1. The high-viscosity asphalt is TPS high-viscosity asphalt. The materials and fillers are limestone. Heat the coarse aggregate, fine aggregate and filler to 170°C, heat the high-viscosity asphalt to 160°C, mix the coarse aggregate, fine aggregate and high-viscosity asphalt for 90 seconds, add filler and continue to mix for 90 seconds, the temperature of the mixing device is 175°C, and then rolled to obtain a large void matrix asphalt mixture.

[0038] Table 1 Aggregate gradation table of large void matrix asphalt mixture

[0039] Particle size / mm 16～13.2 13.2～9.5 9.5～4.75 4.75～2.36 2.36～1.18 Mass ratio / % 42.7 28.3 12.0 2.2 3.3 Particle size / mm 1.18～0.6 0.6～0.3 0.3～0.15 0.15～0.075 filler Mass ratio / % 1.9 1.2 ...

Embodiment 2

[0047] The preparation of large void matrix asphalt mixture is the same as in Example 1.

[0048] Preparation of cement-based phase change grouting material;

[0049] The mass ratio of cement, fly ash, fine sand, fiber, rubber, latex, water, phase change material, water reducer, expansion agent, coupling agent, thermal conductive filler and early strength agent is: 100:20:20: 2:10:4:75:25:0.3:0.4:4:0.8:2; the cement is sulfoaluminate cement; the mesh of the rubber powder is 40 mesh; the latex is styrene butadiene rubber; the phase change material It is PEG / SiO2 composite shaping phase change material, and its phase change characteristics are shown in Table 3; the water reducer is polycarboxylate water reducer; the early strength agent is triethanolamine; the coupling agent is lignin coupling agent; the thermal conductivity filler is aluminum Alloy powder.

[0050] Table 3 Phase change heat storage characteristics of PEG / SiO2 composite shaped phase change materials

[0051] ...

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Abstract

The invention relates to a pouring type phase change energy storage asphalt concrete pavement material and a preparation method thereof, the pavement material comprises a phase change grouting material and a matrix asphalt mixture with gaps, the matrix asphalt mixture accounts for 70%-90% by mass, and the phase change grouting material accounts for 10%-30% by mass. In the preparation process, a cement-based phase change grouting material or a resin-based phase change grouting material is poured into the matrix asphalt mixture, vibration is applied to the surface of the matrix asphalt mixture in the pouring process, the surface is cleaned after pouring is completed, and the pouring type phase change energy storage asphalt concrete pavement material is obtained after maintenance. The phase change material is used for the asphalt pavement in a pouring form, so that the phase-change material and the asphalt mixture play a role in temperature adjustment while being separated in space, the pouring type phase change energy storage asphalt concrete pavement material does not need to be stirred at high temperature and high mechanical force in the whole preparation process, the influence ofthe phase change material on the performance of the mixture is reduced, and the phase-change material utilization rate is high.

Description

technical field [0001] The invention relates to pavement technology, in particular to a pour-in phase change energy storage asphalt concrete pavement material and a preparation method thereof. Background technique [0002] The temperature sensitivity of asphalt pavement with asphalt mixture as the main surface layer is high, and various temperature diseases, such as rutting, low-temperature cracking, etc., will greatly reduce the service performance and life of asphalt pavement. It is an important component, and its heat scattering effect will aggravate the urban heat island effect. In view of the above situation, the researchers proposed that the pavement can actively adjust the temperature of the pavement by applying phase change materials, redistribute the energy in time and space, thereby reducing the peak temperature of the pavement in summer high temperature areas, and delaying the pavement cooling process in winter cold areas. , reduce temperature cracking, and inhib...

Claims

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Application Information

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IPC IPC(8): C04B26/26C04B28/00C09K5/06C04B111/70
CPCC04B26/26C04B28/00C04B2111/0075C04B2111/70C09K5/063C04B2103/0071C04B14/28C04B18/08C04B14/06C04B18/22C04B2103/302C04B2103/10C04B24/26C04B14/34
Inventor 马骉王小庆徐佳云
Owner CHANGAN UNIV
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