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Rubber asphalt, preparation and application thereof

A technology of rubber asphalt and asphalt, which is applied in the composition and preparation of high-performance, environmentally friendly and stable rubber asphalt, which can solve the problems of performance attenuation, rubber asphalt storage segregation, easy precipitation, etc., achieve good elastic performance and storage resistance, and achieve low temperature Effects of environmentally friendly processing, easy swelling and reaction

Inactive Publication Date: 2014-12-17
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Patent 200510016292.9 "Production Equipment for Waste Tire Rubber Powder Modified Asphalt" and Patent 200610047442.7 "A Preparation Method for Rubber Powder Modified Asphalt Suitable for Industrial Production" both proposed multi-stage high-temperature shear mills to improve the rubber powder However, there are problems such as energy consumption and pollution in the high-temperature shearing process, and rubber asphalt still has the problems of storage segregation and high-temperature viscosity decay.
[0009] Patent ZL101747637 discloses a kind of low-temperature environment-friendly rubber asphalt, which specifically discloses the following technology, after mixing the rubber powder, desulfurization aid and bonding granulation agent with recycled polyethylene, the screw extruder is used for mixing, plasticizing and granulating, Plasticized granules are obtained, the particle size is 1-10mm, and the density is 0.6-1.lg / cm3, which realizes low-temperature environmental protection modification processing, but although this process solves the low-temperature environmental protection problem, when the obtained rubber asphalt is stored, the rubber powder is easy to precipitate , while polyethylene floats, causing segregation, and cannot be used for stable production. On the other hand, the residual desulfurization additive will accelerate its further degradation in asphalt, and its performance will attenuate

Method used

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  • Rubber asphalt, preparation and application thereof
  • Rubber asphalt, preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Weigh 1000g of rubber powder processed from waste tires, the mesh number is 30 mesh, extract oil from 100g of furfural, and put 150g of polyolefin elastomer into a mixer for mixing. The extruder is extruded, the extrusion temperature is 190°C, the extruded material is desulfurized and devolatilized by the extruder, and the extruded material is made into pellets through the die face pelletizing equipment, the size of the pellets is 2-6mm, and the density is 0.85g / cm 3 , Weigh 0.5% of the weight of desulfurization and devolatilization granules as a cross-linking agent, add the mixture of cross-linking agent and desulfurization and devolatization granules to Kunlun No. 70 asphalt in a proportion of 20% to prepare asphalt modified granules. Shear at high temperature for 20 minutes to prepare rubber asphalt.

Embodiment 2

[0024] Weigh 1000g of rubber powder processed from waste tires, the mesh number is 30 mesh, extract oil from 100g of furfural, and put 150g of polyolefin elastomer into a mixer for mixing. The extruder is extruded, the extrusion temperature is 220°C, the extruded material is desulfurized and devolatilized by the extruder, and the extruded material is made into granules through the die surface granulation equipment, the size of the granules is 2-6mm, and the density is 0.85g / cm 3 , Weigh 0.5% of the weight of sulfur desulfurization and devolatilization particles as a reactive cross-linking agent, and add the mixture of cross-linking agent and desulfurization and devolatization particles into Kunlun No. 70 asphalt in a proportion of 20% to prepare asphalt modified particles. The rubber asphalt was prepared by shearing at ℃ for 20 minutes.

Embodiment 3

[0026]Weigh 1000g of rubber powder processed from waste tires, the mesh number is 30 mesh, extract oil from 100g of furfural, and put 150g of polyolefin elastomer into a mixer for mixing at a mixing temperature of 50-80°C, and extrude the mixture with reclaimed rubber desulfurization The extruder is extruded, the extrusion temperature is 250°C, the extruded material is desulfurized and devolatilized by the extruder, and the extruded material is made into granules through the die surface granulation equipment, the size of the granules is 2-6mm, and the density is 0.85g / cm 3 , Weigh 0.5% of the weight of sulfur desulfurization and devolatilization particles as a reactive cross-linking agent, and add the mixture of cross-linking agent and desulfurization and devolatization particles into Kunlun No. 70 asphalt in a proportion of 20% to prepare asphalt modified particles. The rubber asphalt was prepared by shearing at ℃ for 20 minutes.

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Abstract

The invention relates to a rubber asphalt, preparation and application thereof. The preparation method includes: mixing rubber powder, a stabilizer and an assistant at 20-100DEG C; extruding and devolatilizing the mixture by an extruder for reclaimed rubber desulfurization production at 180-250DEG C, making the extruded devolatilized material into desulfurized devolatilized particles by die surface grain cutting equipment; adding the mixture of the desulfurized devolatilized particles and a crosslinking agent into asphalt, and conducting shearing at 120-160DEG C for 10-30min. The weight ratio of the asphalt / desulfurized devolatilized particles is 70-80:30-20; the stabilizer is a copolymerized elastomer of ethylene and alpha olefin, and accounts for 10-30% of the weight of the rubber powder. The assistant is furfural extract oil, and accounts for 3-20% of the weight of the rubber powder. The crosslinking agent is sulfur, and accounts for 0.2-5% of the desulfurized devolatilized particles. The rubber asphalt has the characteristics of environment-friendly processing process, high temperature storage stability and high elastic recovery, and can be used for stress absorbing layers, asphalt mixtures, waterproof bonding layers and caulking materials.

Description

technical field [0001] The invention relates to a road construction material, in particular to the composition, preparation method and application of a high-performance, environment-friendly and stable rubber asphalt. Background technique [0002] According to the definition of traditional rubber asphalt, rubber asphalt is processed from waste tires into rubber powder of more than 20 meshes, added to the asphalt at a weight ratio of more than 15%, and reacted at 180°C for 45 minutes to realize the swelling of the asphalt on the rubber powder. Partially desulfurized to obtain a rubberized asphalt mixture. Waste rubber powder can significantly improve the high and low temperature performance of asphalt, and the road paved with it has the advantages of long life and low noise, realizing the efficient and environmentally friendly utilization of waste resources. [0003] However, the processing temperature of rubber asphalt is higher (180°C), and when cold rubber powder is added...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L21/00C08L23/08C08K5/00C08K3/06B29C47/00
Inventor 李剑新蒋福山时敬涛李玉环黄宏海
Owner PETROCHINA CO LTD
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