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Self-heat-absorption anti-icing pavement and preparation method thereof

An anti-icing and shell technology, which is applied to roads, roads, pavement details, etc., can solve the problems of simple process, reduce the service life of the road surface, and cannot melt ice and snow, so as to ensure driving safety, prevent road surface from icing, and not easy to freeze Effect

Inactive Publication Date: 2020-05-08
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] But in above-mentioned method, the method for spreading deicing agent exists the problem that deicing agent can pollute environment, corrode road surface, reduce the service life of pavement; The method for mechanical removal exists the problem that takes a long time and is difficult to thoroughly remove the ice layer of pavement, in The methods of laying hydrophobic coating materials on the road surface and adding antifreeze materials to the asphalt are only suitable for situations where the temperature is not particularly low. The main principle of deicing elastic pavement materials is to use the extrusion deformation of elastic materials to break the ice surface. This method has disadvantages. The effect of melting ice and snow is not good in areas with severe cold weather. The deicing of rough roads increases the friction between the road surface and the tires, which will cause a certain degree of damage to the tires of the car.
The method of paving carbon fiber heating wire on the road and laying heating cables on the road has not been actually used due to the difficulty of construction and high energy consumption.
At present, there is no method capable of large-scale application, simple process, low cost and good durability.

Method used

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  • Self-heat-absorption anti-icing pavement and preparation method thereof
  • Self-heat-absorption anti-icing pavement and preparation method thereof
  • Self-heat-absorption anti-icing pavement and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) 66.6% calcium chloride hexahydrate compounded with 33.4% magnesium chloride hexahydrate is encapsulated in hollow steel balls to obtain steel balls rich in compound salts;

[0030] (2) Replace 30% of crushed stone with steel balls rich in compound salt, and prepare C50 concrete with a water-cement ratio of 0.4, in which the amount of P.O42.5 cement is 300kg m -3 , the amount of fly ash is 75kg·m -3 , the sand is 688kg·m -3 , steel ball 180kg·m -3 , gravel 860kg·m -3 , the water volume is 150kg·m -3 ;

[0031] (3) Dry mix cement and fly ash in a mixer for 20 seconds, add sand and continue mixing for 20 seconds, then add 1 / 3 water and stir for 60 seconds, add steel balls and gravel and the remaining 2 / 3 water, stir for 120 seconds, then Molded to produce a cube of 150mm×150mm×150mm, standard curing, measured its 28d strength ≥ 50MPa, thermal conductivity ≥ 2.5W / (m K), volume heat capacity including phase change heat ≥ 11.8 (MJ / m 3 · K). This example successfu...

Embodiment 2

[0033] (1) adsorption and encapsulation of zinc chloride trihydrate with fly ash porous ceramsite, obtain the fly ash porous ceramsite rich in zinc chloride trihydrate;

[0034] (2) Replace 100% of crushed stone with fly ash porous ceramsite rich in zinc chloride trihydrate, and the water-cement ratio is 0.5 to prepare C30 concrete, in which the amount of P.O42.5 cement is 300kg m -3 , the amount of fly ash is 120kg·m -3 , the sand is 688kg·m -3 , porous ceramsite 700kg m -3 , the water volume is 210kg·m -3 ;

[0035] (3) Dry mix cement and fly ash in a mixer for 20 seconds, add sand and continue mixing for 20 seconds, then add 1 / 3 water and stir for 60 seconds, add ceramsite and gravel and the remaining 2 / 3 water, stir for 120 seconds, then Molded to produce a cube of 150mm×150mm×150mm, standard curing, measured its 28d strength ≥ 30MPa, thermal conductivity ≥ 1.8034W / (m K), volumetric heat capacity including phase change heat ≥ 15.3 (MJ / m 3 · K). This example success...

Embodiment 3

[0037] (1) encapsulating potassium hydrogen phosphate hexahydrate with hollow sludge ceramsite to obtain hollow sludge ceramsite rich in potassium hydrogen phosphate hexahydrate;

[0038] (2) Replace 100% of gravel with hollow sludge ceramsite rich in potassium hydrogen phosphate hexahydrate, the water-cement ratio is 0.5, and prepare C20 alkali-activated concrete, and the amount of fly ash is 400kg m -3 , the sand is 700kg·m -3 , hollow sludge ceramsite 800kg m -3 , 10mol / L sodium hydroxide solution 200kg m -3 ;

[0039] (3) Stir fly ash and sodium hydroxide in a mixer for 60s, add ceramsite and stir for 120s, and then shape it to obtain a cube of 150mm×150mm×150mm, standard curing, its 28d strength is measured to be ≥20MPa, and its thermal conductivity ≥1.6034W / (m·K), volumetric heat capacity including phase change heat ≥13.2(MJ / m 3· K). In this example, phase change-alkali-activated concrete with a strength grade of C20 was successfully prepared. The solid-liquid phase...

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Abstract

The invention discloses a self-heat-absorption anti-icing pavement and a preparation method thereof, and belongs to the technical field of road traffic. The preparation method comprises the followingsteps: pretreating a hydrated salt phase change material, packaging to obtain a heat storage aggregate, mixing the heat storage aggregate with an aggregate, a cementing material and an additive to prepare a pavement material, and maintaining the pavement material to obtain the self-heat-absorption anti-icing pavement. The hydrated salt phase change material is mixed with a concrete or asphalt pavement by utilizing the phase change heat storage capacity of the hydrated salt phase change material, absorbs heat in the daytime with high temperature, releases heat at night with low temperature, keeps the pavement temperature, prevents the pavement from icing, and is suitable for pavement freezing prevention in areas with strong sunlight in the daytime and large day-night temperature difference.

Description

technical field [0001] The invention relates to the technical field of road traffic, in particular to a self-heating anti-icing road surface and a preparation method thereof. Background technique [0002] The problem of icing on the road surface affects the driving safety in our country. How to effectively remove the ice layer on the road surface has always been a research hotspot. At present, the main methods are manual removal method, mechanical removal method, spreading deicing agent, laying heating cables on the road, deicing elastic pavement materials, laying hydrophobic coating materials on the road surface, spreading carbon brazing fiber heating wire on the road surface, Asphalt is mixed with antifreeze materials, pavement asphalt adopts anti-icing asphalt composite materials, porous ceramsite salt-rich concrete pavement materials, and rough road deicing. [0003] But in above-mentioned method, the method for spreading snow-melting agent exists the problem that snow-...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B28/02E01C11/24
CPCC04B28/021C04B28/04C04B2111/0075C04B2201/32C04B2201/50E01C11/245C04B20/026C04B22/124C04B22/12C04B14/34C04B18/08C04B14/06C04B18/12C04B18/027C04B18/023C04B22/16C04B22/062
Inventor 李辉郑伍魁张静洁杨雨玄
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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