A kind of SBS modified asphalt based on graphene oxide and preparation method thereof

A technology of modified asphalt and graphene, which is applied in building components, building insulation materials, buildings, etc., can solve the problems of construction personnel and environmental impact, increased road construction costs, poor compatibility, etc., and achieve strong high temperature Effects of stability and road performance, high temperature stability improvement, and low temperature crack resistance improvement

Active Publication Date: 2017-07-07
SHANXI PROVINCIAL RES INST OF COMM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, SBS and asphalt differ greatly in chemical structure and relative molecular mass, so the compatibility between the two is poor, and two-phase separation occurs at high temperature.
[0004] Chinese patent (CN 103819915 A) discloses a graphene oxide modified asphalt and its preparation method. Graphene oxide as a modifier can improve the basic performance of asphalt, but there is a lack of relevant research on the road performance of modified asphalt mixture
In addition, the price of graphene is relatively high, and too much usage will directly lead to an increase in the cost of road construction
Chinese patent (CN 101628989A) and Chinese patent (CN 102382329 A) use sulfur and other substances as SBS modified asphalt stabilizers to solve the problem of easy segregation between SBS and matrix asphalt. The report does not test other properties of modified asphalt research, and the reaction of sulfur is violent, so it is not suitable to be controlled. In addition, sulfur is more irritating and has a greater impact on construction workers and the environment
So far, there are many additives for modified asphalt, but there are few reports on the method that can comprehensively improve the performance of SBS modified asphalt, the process is simple and mild, and the cost is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Will Shell 90 # Asphalt and SBS with a dosage of 5% were sheared at 3000rpm for 40min at 170°C, then stirred for 30min, then added with 0.5% graphene oxide, sheared and stirred for 20min, and then added with a dosage of 0.2% tetrasulfide Methyl thiuram, continue to shear for 15 minutes, to obtain SBS modified asphalt with high thermal stability and strong road performance.

[0023] The main properties of the prepared modified asphalt are as follows: softening point 68.4°C, penetration 49.1dmm, ductility 33.3cm, segregation softening point difference 1.6°C, mixture dynamic stability 6732 times / mm, freeze-thaw splitting residual strength ratio 91% , The bending failure strain of the trabecular low temperature cracking test is 2982με.

Embodiment 2

[0025] Will Shell 90 # Asphalt and 5% SBS were sheared at 170°C at 3000rpm for 40 minutes, then stirred for 30 minutes, then added with 0.5% graphene oxide, continued to shear and stir for 20 minutes, and then added 0.4% diphenyl disulfide and thiazole, and continue to shear for 15 minutes to obtain SBS modified asphalt with high thermal stability and strong road performance.

[0026] The main properties of the prepared SBS modified asphalt are as follows: softening point 69.2°C, penetration 48.7dmm, ductility 34.5cm, segregation softening point difference 1.3°C, mixture dynamic stability 6829 times / mm, freeze-thaw splitting residual strength ratio 91%, the bending failure strain of the trabecular low temperature cracking test is 2912με.

Embodiment 3

[0028] Will Shell 90 # Asphalt and 5% SBS were sheared at 170°C for 40 minutes at a speed of 3000rpm and then stirred for 30 minutes, then 0.5% graphene oxide was added, and the shearing and stirring was continued for 20 minutes, followed by adding 0.6% N-cyclohexyl- 2-Benzothiazole sulfenamide, continue shearing for 15 minutes, and obtain SBS modified asphalt with high thermal stability and strong road performance.

[0029] The main properties of the prepared modified asphalt are as follows: softening point 70.5°C, penetration 47.6dmm, ductility 35.6cm, segregation softening point difference 0.7°C, mixture dynamic stability 6898 times / mm, freeze-thaw splitting residual strength ratio 94% , The bending failure strain of the trabecular low temperature cracking test is 3019με.

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Abstract

The invention belongs to the technical field of modified asphalt, and particularly relates to SBS modified asphalt based on graphene oxide and a preparing method thereof. The SBS modified asphalt based on the graphene oxide comprises asphalt serving as a matrix, the graphene oxide serving as an additive, linear SBS serving as a modifier, and a sulfur-bearing accelerant, wherein the mass of the graphene oxide is 0.5-3% that of the matrix asphalt, the mass of the linear SBS is 3-5% that of the matrix asphalt, and the mass of the sulfur-bearing accelerant is 0.2-0.6% that of the matrix asphalt. Compared with the prior art, the SBS modified asphalt based on the graphene oxide has the advantages that the advantages of the graphene oxide are fully utilized, high-temperture stability, high-temperature rut resistance, low-temperature cracking resistance, fatigue resistance and water stability are high, the preparing method is simple, the process is mitigatory, and cost is low.

Description

technical field [0001] The invention belongs to the technical field of modified asphalt, and specifically relates to a graphene oxide-based SBS modified asphalt and a preparation method thereof. Background technique [0002] Graphene has become a popular material for research and application in recent years due to its advantages of high strength, high thermal conductivity, high electrical conductivity, heat resistance and chemical stability. In addition, graphene is a nano-two-dimensional material, and its anisotropic structure can form a cross-network structure in a liquid system, thereby enhancing the stability of the overall system. Graphene oxide is a functionalized graphene obtained by oxidizing natural graphite. It does not destroy the structure of graphene. There are a large number of active oxygen-containing functional groups such as hydroxyl, epoxy, and carboxyl on the surface of graphene oxide. These functional groups can provide Reaction sites, so that graphene o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L53/02C08K3/04C08K5/40C08K5/47
Inventor 畅润田杜素军庞瑾瑜裴强薛君郭赢赢郭殿军程飞王永岗边睿宋飞
Owner SHANXI PROVINCIAL RES INST OF COMM
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