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Asphalt inflaming-retarding modified waste rubber powder for road and preparation method

A technology for waste rubber powder and asphalt, applied in the field of road flame retardant asphalt, can solve the problems of different interfacial tension, influence on flame retardant effect, high resistance of rubber asphalt pavement, low temperature performance reduction, etc., and achieves simple preparation process and good flame retardant effect. , the effect of small harm to the human body

Active Publication Date: 2017-02-22
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the different specific gravity and interfacial tension of the flame retardant, waste rubber powder, and asphalt, the compatibility of the three is poor, and the flame retardant cannot be uniformly dispersed in the asphalt, which is prone to segregation and affects the flame retardant effect.
Moreover, waste rubber powder is also difficult to disperse evenly in asphalt, which significantly reduces the high and low temperature resistance of rubber asphalt pavement.

Method used

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  • Asphalt inflaming-retarding modified waste rubber powder for road and preparation method
  • Asphalt inflaming-retarding modified waste rubber powder for road and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Weigh 100 parts of base asphalt AH-70, 9 parts of ammonium polyphosphate, 2.25 parts of pentaerythritol, 18 parts of waste rubber powder, 5 parts of sodium lignosulfonate, and 2 parts of styrene-butadiene latex.

[0024] First, ammonium polyphosphate, pentaerythritol, sodium lignosulfonate, and styrene-butadiene latex were blended, and ultrasonicated for 10 minutes. Then mix the mixed emulsion with the waste rubber powder, add it to a high-speed mixer and stir for 10 minutes, and dry it at 60°C for 12 hours after the stirring is completed. Melt the base asphalt to 160°C, add the dried modified waste rubber powder, and use a high-speed shear emulsifier at 3500-5000r / min for 60 minutes to make the rubber powder fully swell in the asphalt. Obtain fire retardant rubber asphalt.

Embodiment 2

[0026] Weigh 100 parts of base asphalt AH-70, 6 parts of ammonium polyphosphate, 1.5 parts of pentaerythritol, 18 parts of waste rubber powder, 3 parts of sodium lignosulfonate, and 2 parts of styrene-butadiene latex. The preparation process is the same as in Example 1.

Embodiment 3

[0028] Weigh 100 parts of base asphalt AH-70, 3 parts of ammonium polyphosphate, 0.75 parts of pentaerythritol, 18 parts of waste rubber powder, 1.5 parts of sodium lignosulfonate, and 2 parts of styrene-butadiene latex. The preparation process is the same as in Example 1.

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Abstract

The invention discloses asphalt inflaming-retarding modified waste rubber powder for a road and a preparation method thereof. The asphalt inflaming-retarding modified waste rubber powder is prepared from matrix asphalt, waste rubber powder, ammonium polyphosphate, pentaerythritol, sodium lignin sulfonate and rubber latex. The ammonium polyphosphate, the pentaerythritol, the sodium lignin sulfonate and the rubber latex are blended, and then are ultrasonically dispersed; a blended emulsion system and the waste rubber powder are agitated at a high speed; prepared modified inflaming-retarding waste rubber powder is oven-dried; the matrix asphalt is fused, and is added into the modified inflaming-retarding waste rubber powder; an obtained mixture is agitated uniformly by using a high-speed shearing and emulsifying machine. In inflaming-retarding rubber asphalt prepared by the method, the rubber latex can be used for achieving favorable stabilization and dispersion effects on particles of the ammonium polyphosphate, effectively solving the problems that an inflaming-retarding agent easily aggregates and is poor in the compatibility with the matrix asphalt, and has a promotion effect on the inflaming-retarding reaction of an ammonium polyphosphate / pentaerythritol inflaming-retarding system. Meanwhile, the rubber latex used in the method has the function of enhancing the compatibility among particles of the waste rubber powder and the matrix asphalt, and can be used for effectively preventing the segregation of a filling material in the asphalt.

Description

technical field [0001] The invention belongs to the technical field of road flame-retardant asphalt, and in particular relates to a modified waste rubber powder for road-use flame-retardant asphalt and a preparation method thereof. Background technique [0002] Compared with traditional cement concrete pavement materials, asphalt materials have the advantages of low noise, good driving comfort, and good wet skid resistance, and are widely used in the paving of high-grade highways in my country. Due to the large climate differences in various regions of our country, in order to meet the use requirements of different regions, various methods of modifying asphalt have been developed in our country. Among them, adding waste rubber powder made from waste tires to asphalt can not only improve the performance of asphalt pavement, but also increase the recycling rate of waste tires, which is an economical and sustainable method. In the 1930s, foreign countries began to use waste ru...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L19/00C08L9/08C08L9/10C08L7/02C08L15/00C08L97/00C08K9/04C08K3/32C08K5/053
CPCC08L95/00C08L2201/02C08L2205/02C08L2205/035C08L2205/08C08L2555/50C08L2555/80C08L19/003C08L9/08C08L9/10C08L7/02C08L15/00C08L97/005C08K9/08C08K2003/323C08K5/053
Inventor 张新星曹杰卢灿辉
Owner SICHUAN UNIV