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Method for producing damping porous denoise tunnel asphalt covering material

An asphalt surface layer and damping technology, which is applied in the field of material science and engineering, can solve the problems of uncontrollable combustion of liquid combustion materials such as gasoline, no control effect on tunnel vehicle fires, and lower limit oxygen index of flame-retardant asphalt, so as to achieve enhanced structural durability Performance and noise reduction, reduce casualties and economic losses, reduce the effect of fire hazards

Active Publication Date: 2011-06-08
WUHAN MUNICIPAL CONSTR GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, large-scale road tunnels have the characteristics of closed space, poor ventilation, and high noise. For fire safety considerations, large-scale road tunnels are very cautious in the use of asphalt materials
Some organic flame retardants, such as brominated flame retardants, are used in longer tunnels, and the pavement type is mostly AC series asphalt concrete, but this kind of flame-retardant asphalt concrete pavement cannot control the combustion of liquid combustibles such as gasoline at all, and is harmful to tunnel vehicles. The fire has no control effect. Studies have shown that under the high temperature state of complete combustion of gasoline, the limiting oxygen index of flame-retardant asphalt will be greatly reduced, and compared with gasoline and other combustibles, the partial combustion of asphalt pavement is negligible at all, so it must be effectively controlled Amount of combustible liquids such as gasoline participating in the combustion in the tunnel

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A method for preparing a damping porous noise-reducing tunnel asphalt surface material, which comprises the following steps:

[0027] 1) Preparation of high-viscosity and high-elasticity modified asphalt: high-viscosity and high-elasticity modified asphalt is composed of base asphalt, modifier SBS, activated rubber powder, viscosifying compatibilizer, antioxidant and stabilizer, according to each component The mass ratio is base asphalt: modifier SBS: activated rubber powder: thickening compatibilizer: antioxidant: stabilizer = 100: 6.0: 20.2: 1.2: 0.2: 0.4, select base asphalt, modifier SBS, Activated rubber powder, thickening compatibilizer, antioxidant and stabilizer, spare;

[0028] Firstly, the melted matrix asphalt and the modifier SBS are put into the colloid mill for grinding, after one cycle, the viscosifying compatibilizer, antioxidant and stabilizer are added, and the grinding is continued for 3 cycles, the temperature is controlled at 150°C, and then Put th...

Embodiment 2

[0043] A method for preparing a damping porous noise-reducing tunnel asphalt surface material, which comprises the following steps:

[0044] 1) Preparation of high-viscosity and high-elasticity modified asphalt: high-viscosity and high-elasticity modified asphalt is composed of base asphalt, modifier SBS, activated rubber powder, viscosifying compatibilizer, antioxidant and stabilizer, according to each component The mass ratio is base asphalt: modifier SBS: activated rubber powder: thickening compatibilizer: antioxidant: stabilizer = 100: 12.4: 29.1: 2.6: 0.7: 0.8, select base asphalt, modifier SBS, Activated rubber powder, thickening compatibilizer, antioxidant and stabilizer, spare;

[0045] Firstly, the melted matrix asphalt and the modifier SBS are put into the colloid mill for grinding, after one cycle, the viscosity-increasing compatibilizer, antioxidant and stabilizer are added, and the grinding is continued for 4 cycles, the temperature is controlled at 170°C, and the...

Embodiment 3

[0061] A method for preparing a damping porous noise-reducing tunnel asphalt surface material, which comprises the following steps:

[0062] 1) Preparation of high-viscosity and high-elasticity modified asphalt: high-viscosity and high-elasticity modified asphalt is composed of base asphalt, modifier SBS, activated rubber powder, viscosifying compatibilizer, antioxidant and stabilizer, according to each component The mass ratio is base asphalt: modifier SBS: activated rubber powder: thickening compatibilizer: antioxidant: stabilizer=100: 18.3: 45.7: 3.7: 1.4: 1.9, select base asphalt, modifier SBS, Activated rubber powder, thickening compatibilizer, antioxidant and stabilizer, spare;

[0063] Firstly, the melted base asphalt and the modifier SBS are put into the colloid mill for grinding, after one cycle, the viscosifying compatibilizer, antioxidant and stabilizer are added, and the grinding is continued for 6 cycles, the temperature is controlled at 180°C, and then Pass the ...

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Abstract

The invention relates to a preparation method of tunnel asphalt surface coat material, in particular to the preparation method of damping multi-hole noise eliminating tunnel asphalt surface coat material. The preparation method is characterized in that the invention comprises the steps as follows: (1) modified asphalt with high viscosity and high elasticity is prepared by the components with a weight ratio that modifier SBS: activating rubber powder: thickening compatibilizer: antioxidant: stabilizing agent is equal to 100:6.0 to 18.3:20.2 to 45.7:1.2 to 3.7:0.2 to1.4:0.4 to 1.9; the modified asphalt with high viscosity and high elasticity is obtained; (2) a flame retardant is added in the modified asphalt with high viscosity and high elasticity, the modified asphalt with high viscosityand high elasticity is heated to melt and the flame retardant is added, after being mixed for 3 to 9 minutes and being reversed in stillness for 15 to 30 minutes in 150 to 170 DEG C, the flame retarding modified asphalt with high viscosity and high elasticity is produced; (3) mineral aggregate: the flame retarding modified asphalt with high viscosity and high elasticity: fiber stabilizer being equal to the weight ratio of 100 : 36 to 5.2 : 0.1 to 0.4 is chosen to produce the damping multi-hole noise eliminating tunnel asphalt surface coat material. The invention has the functions of reducing noise, retarding flame and resisting slip.

Description

technical field [0001] The invention belongs to the field of material science and engineering, and in particular relates to a preparation method of a tunnel asphalt surface material. technical background [0002] The noise of tunnels is a technical issue of general concern. At present, the research on noise reduction pavement mostly focuses on the use of porous asphalt mixture, such as OGFC asphalt mixture, to absorb noise and eliminate the tire pumping effect. However, the sound absorption effect of porous materials is limited, reducing the The noise effect is generally only 2-4dB, which cannot fundamentally solve the problem of tunnel noise. The damping technology is mainly to add some materials that increase elasticity or have a space network structure to the asphalt to improve the damping characteristics of the material and eliminate the vibration and noise of the tires and even the vehicle body during driving. [0003] At present, large-scale road tunnels have the char...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08J3/20C08K3/34C08L53/00C08L57/02C08L21/00
Inventor 丁庆军胡曙光刘新权黄绍龙吴学伟沈凡方杨
Owner WUHAN MUNICIPAL CONSTR GROUP
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