Vulcanized natural rubber modified asphalt and preparation method thereof

A natural rubber modification, natural rubber technology, applied in building components, building insulation materials, buildings, etc., to achieve the effect of improving high and low temperature performance, increasing rotational viscosity, and decreasing penetration

Inactive Publication Date: 2020-06-30
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, natural rubber modified asphalt is facing problems such as cost and te

Method used

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  • Vulcanized natural rubber modified asphalt and preparation method thereof
  • Vulcanized natural rubber modified asphalt and preparation method thereof
  • Vulcanized natural rubber modified asphalt and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The mass fraction of natural rubber in the matrix asphalt is 2%, and the vulcanization formula is: 100 parts of natural rubber, 10 parts of sulfur, 5 parts of zinc oxide, 2 parts of stearic acid, and 2 parts of TMTD.

[0025] The specific preparation method is as follows:

[0026] Take 196g of 90# base asphalt, heat and melt at 145°C, add 4g of natural rubber crumbs, stir properly and put it in a 145°C oven for swelling and development for 1 hour; take out the above mixture and rotate and shear it at a high speed at 160°C and 4000rpm for 1 hour , to obtain a natural rubber asphalt mixture in which rubber is evenly dispersed in asphalt; add 0.4g of sulfur, 0.2g of zinc oxide, 0.08g of stearic acid, and 0.08g of TMTD to the mixture according to the vulcanization formula, and continue to rotate and shear at a high speed for 15min according to the above conditions ; Then take it out and put it in an oven at 145°C for 1 hour to keep it warm for 1 hour to obtain the vulcanize...

Embodiment 2

[0028] The mass fraction of natural rubber in the base asphalt is 2.5%, and the vulcanization formula is: 100 parts of natural rubber, 5 parts of sulfur, 5 parts of zinc oxide, 2 parts of stearic acid, and 2 parts of TMTD.

[0029] The specific preparation method is as follows:

[0030] Take 195g of 90# base asphalt, heat and melt at 160°C, add 5g of natural rubber crumbs, stir properly and put it in a 160°C oven to swell and develop for 1.5h; take out the above mixture and rotate and shear at a high speed at 150°C and 6000rpm 1.5h to obtain a natural rubber asphalt mixture in which the rubber is evenly dispersed in the asphalt; add 0.25g of sulfur, 0.25g of zinc oxide, 0.1g of stearic acid, and 0.1g of TMTD to the mixture according to the vulcanization formula, and continue to perform high-speed rotary shearing according to the above conditions. Cut for 30 minutes; then take it out and put it in an oven at 160°C for 2 hours to keep the vulcanized natural rubber modified aspha...

Embodiment 3

[0032] The mass fraction of natural rubber in the matrix asphalt is 2.5%, and the vulcanization formula is: 100 parts of natural rubber, 10 parts of sulfur, 5 parts of zinc oxide, 2 parts of stearic acid, and 2 parts of TMTD.

[0033] The specific preparation method is as follows:

[0034] Take 195g of 90# base asphalt, heat and melt at 140°C, add 5g of natural rubber crumbs, stir properly and put it in a 140°C oven to swell and develop for 1 hour; take out the above mixture at a temperature of 140°C and rotate at a speed of 5000rpm and shear it at a high speed for 1.2 h, to obtain a natural rubber asphalt mixture in which rubber is evenly dispersed in asphalt; add 0.5g of sulfur, 0.25g of zinc oxide, 0.1g of stearic acid, and 0.1g of TMTD to the mixture according to the vulcanization formula, and continue to rotate and shear at a high speed according to the above conditions 20 minutes; then take it out and put it in an oven at 140°C for 1.5 hours to keep the vulcanized natura...

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Abstract

The invention belongs to the technical field of building roads, and particularly relates to vulcanized natural rubber modified asphalt and a preparation method thereof. The modified asphalt is prepared from matrix asphalt, natural rubber, a vulcanizing agent and an accelerant. The preparation method comprises the steps: uniformly dispersing natural rubber into matrix asphalt through high-speed rotary shearing, and adding the vulcanizing agent and the accelerant into the matrix asphalt to vulcanize and crosslink the natural rubber in the asphalt to form a network structure, thereby obtaining the high-performance modified asphalt. After modification, the softening point, ductility at 5 DEG C and rotary viscosity at 135 DEG C of the asphalt are remarkably improved, the needle penetration is reduced, and obvious elastic recovery performance appears. Therefore, the natural rubber modified asphalt provided by the invention has good high-low temperature performance, is an effective asphalt modification method and is suitable for popularization and application.

Description

technical field [0001] The invention belongs to the technical field of building roads, relates to related problems of modified asphalt in road engineering, in particular to a vulcanized natural rubber modified asphalt and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of my country's economy, traffic overload has become increasingly serious, and road surface diseases have become increasingly prominent. In order to deal with road surface diseases and prolong the service life of roads, adding modifiers to asphalt is the current mainstream practice, and common asphalt modifiers include SBS, waste rubber powder, styrene-butadiene latex, etc. [0003] At present, due to the continued low price of natural rubber, natural rubber producing countries such as Malaysia and Thailand have a strong desire to use natural rubber for asphalt modification, hoping to expand the consumer market of natural rubber. Malaysia has achieved so...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L7/00C08K3/06C08K3/22C08K5/09C08K5/40C08K13/02
CPCC08K2003/2296C08L95/00C08L2201/08C08L7/00C08K3/06C08K3/22C08K5/09C08K5/40C08K13/02
Inventor 潘宝峰李壮壮沙东车天凯边佳若栗煜东
Owner DALIAN UNIV OF TECH
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