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Rubber powder-modified asphalt and preparation method thereof

A technology for modifying asphalt and rubber powder, applied in building components, building insulation materials, construction and other directions, can solve the problems of poor storage stability, incomplete improvement of matrix asphalt, affecting the performance of rubber powder modified asphalt, etc. Low temperature performance and water stability performance, ductility and segregation index improvement, the effect of solving poor storage stability

Active Publication Date: 2013-05-01
XIAN HIGHWAY INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] (1) Poor storage stability
During the storage of rubber powder modified asphalt, rubber powder and matrix asphalt are prone to segregation and delamination due to surface energy, which makes the dispersion of rubber powder in matrix asphalt uneven and affects the performance of rubber powder modified asphalt
[0008] (2) The improvement performance of base asphalt is not comprehensive
Rubber powder modified asphalt can improve the viscosity and anti-aging performance of base asphalt, but it has a negative effect on other properties, such as the ductility of asphalt, which limits the popularization and application of the product
[0009] (3) The viscosity of rubber powder modified asphalt is too high
Due to the high viscosity of rubber powder modified asphalt, more heating energy, high-performance mixing and shearing equipment are required in the production process, which increases the production cost of the product

Method used

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  • Rubber powder-modified asphalt and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] According to parts by weight, take 30 parts of 40-mesh rubber powder, 100 parts of Korean SK petroleum asphalt with a label of 70, and 1 part of styrene-butadiene-styrene triblock copolymer (SBS), produced by China Petroleum Lanzhou Petrochemical Company The rubber filler oil is 5 parts, the polyethylene grafted maleic anhydride polymer (PE-MAH) is 2 parts, and the sulfur is 3 parts.

[0025] The production process of rubber powder modified asphalt is as follows: heat petroleum asphalt to 160°C, add rubber powder into the asphalt and stir for 75 minutes at a temperature of 160°C, after the stirring is completed, mix styrene-butadiene-styrene Segment copolymer, rubber filler oil, polyethylene grafted maleic anhydride polymer (PE-MAH) and sulfur are added to it, and then sheared by a shearing machine for 30 minutes at a shearing temperature of 170 ° C, and finally in a temperature of 140 ° C Swell for 15 hours under ambient conditions to obtain rubber powder modified asph...

Embodiment 2

[0027] According to parts by weight, take 20 parts of 60-mesh rubber powder, 100 parts of Korean SK petroleum asphalt with a label of 90, and 2 parts of styrene-butadiene-styrene triblock copolymer (SBS), produced by China Petroleum Lanzhou Petrochemical Company The rubber filler oil is 4 parts, the polyethylene grafted maleic anhydride polymer (PE-MAH) is 1 part, and the sulfur is 2 parts.

[0028] The production process of rubber powder modified asphalt is to heat petroleum asphalt to 170°C, add rubber powder to the asphalt and stir for 60 minutes at a temperature of 160°C, after the stirring is completed, styrene-butadiene-styrene Segment copolymer, rubber filler oil, polyethylene grafted maleic anhydride polymer (PE-MAH) and sulfur are added to it, and then sheared by a shearing machine for 45 minutes at a shearing temperature of 170 ° C, and finally in a temperature of 130 ° C Swell for 18 hours under ambient conditions to obtain rubber powder modified asphalt.

Embodiment 3

[0030] According to parts by weight, take 15 parts of 80-mesh rubber powder, 100 parts of Korean SK petroleum asphalt with a label of 90, and 0.5 parts of styrene-butadiene-styrene triblock copolymer (SBS), produced by PetroChina Lanzhou Petrochemical Company The rubber extender oil is 2 parts, the polyethylene graft maleic anhydride polymer (PEMAH) is 0.5 parts, and the sulfur is 1 part.

[0031] The production process of rubber powder modified asphalt is to heat petroleum asphalt to 150°C, add rubber powder to the asphalt and heat and stir for 45min, the stirring temperature is 160°C, after the stirring is completed, styrene-butadiene-styrene three Block copolymer, rubber filler oil, polyethylene grafted maleic anhydride polymer (PEMAH) and sulfur were added to it, and then sheared by a shearing machine for 60 minutes at a shear temperature of 170°C, and finally in an environment with a temperature of 150°C Swell for 12 hours to obtain rubber powder modified asphalt.

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Abstract

The invention belongs to the technical field of materials for road works, and discloses rubber powder-modified asphalt and a preparation method thereof. The rubber powder-modified asphalt consists of the following components: 100 parts by weight of petroleum asphalt, 15 to 30 parts by weight of rubber powder, 0.5 to 2 parts by weight of styrene-butadiene-styrene triblock copolymer, 2 to 5 parts by weight of aromatic oil, 0.5 to 2 parts by weight of maleic anhydride polymer and 1 to 3 parts by weight of sulfur. The preparation method for the rubber powder-modified asphalt includes the following steps: the petroleum asphalt is heated to 150 DEG C to 170 DEG C, the rubber powder is then added into the petroleum asphalt and mixed, the styrene-butadiene-styrene triblock copolymer, the aromatic oil, the maleic anhydride polymer and the sulfur are added into the mixture after uniform mixture is finished, the mixture is sheared by a shearing machine, and is swelled under an environment with the temperature of 130 DEG C to 150 DEG C for 12 to 18 hours, and therefore the rubber powder-modified asphalt is obtained.

Description

technical field [0001] The invention belongs to the technical field of road engineering materials, and in particular relates to a rubber powder modified asphalt and a preparation method thereof. Background technique [0002] As car ownership increases, so does the amount of used tires as solid waste. For the disposal of waste rubber tires, people have tried to bury or incinerate them. However, burying will cause waste of land resources and soil pollution, and incineration will release harmful substances that will cause air and groundwater pollution, and aggravate global warming. Fundamentally solve the problem of disposal of waste tires. A large number of waste tires are piled up in the open air for a long time, which not only causes a great waste of resources, but also easily accumulates sewage to breed mosquitoes, spontaneously combusts and causes fires over time, and releases harmful gases to pollute the air when it slowly decomposes. Because the process of natural degr...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L21/00C08L53/02C08L51/06C08K5/01C08K3/06
Inventor 徐希娟周新锋韩微微岳卫民李娜张名成
Owner XIAN HIGHWAY INST
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