Modified asphalt as well as preparation method thereof

A technology for modifying asphalt and asphalt, which is applied in building components, building insulation materials, buildings, etc., can solve the problems of unstable performance of modified asphalt, high mixing temperature, poor storage performance, etc., to improve the softening point and low temperature. The effect of ductility, good low temperature performance

Active Publication Date: 2013-12-25
SHANDONG JINSHI BITUMEN CO LTD
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, when waste rubber powder is used as a road petroleum asphalt modifier to produce asphalt, there are still many problems. The obtained modified asphalt has unstable performance, poor storage performance, poor aging resistance, high mixing temperature, difficult mixing, and low temperature performance. poor disadvantage

Method used

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  • Modified asphalt as well as preparation method thereof
  • Modified asphalt as well as preparation method thereof
  • Modified asphalt as well as preparation method thereof

Examples

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preparation example Construction

[0033] The present invention also provides a method for preparing the above modified asphalt, comprising: A) mixing 70-90 parts by weight of asphalt, 3.0-30 parts by weight of aromatic oil, 2.0-20 parts by weight of waste rubber powder, 1.0-10 parts by weight of Rubber, 0.5-10 parts by weight of Sasobit and 0.05-0.5 parts by weight of cross-linking agent are mixed and heated, and stirred to obtain modified asphalt.

[0034] Wherein, the asphalt, aromatic oil, waste rubber powder, rubber, Sasobit and crosslinking agent are all the same as above, and will not be repeated here.

[0035]According to the present invention, the step A) is specifically as follows: mixing and heating 70-90 parts by weight of asphalt and 3-30 parts by weight of aromatic oil, and performing heat preservation and stirring for the first time; adding 2.0-20 parts by weight of waste rubber powder, Carry out the second thermal insulation stirring; add 1.0-10 weight parts of rubber to carry out the third ther...

Embodiment 1

[0047] Heat 81 parts by weight of 90A asphalt to 120°C, add 8 parts by weight of furfural oil, heat to 155°C, keep stirring for 30min, add 5 parts by weight of waste rubber powder, keep stirring at 155°C for 40min, add 5 parts by weight SBS SBR, keep stirring at 155°C for 40 minutes, add 1 part by weight of Sasobit, keep stirring at 155°C for 40 minutes, then add 0.05 parts by weight of NH4L type crosslinking agent, heat up to 170°C, keep stirring for 20 minutes, and then grind with a colloid mill, After grinding for 50 minutes, the temperature was lowered to 140° C., and stirred for 70 minutes to obtain modified asphalt.

[0048] The modified asphalt obtained in Example 1 was tested for performance, and the results are shown in Table 1.

Embodiment 2

[0050] 78.5 parts by weight of 90A asphalt was heated to 120°C, 8 parts by weight of furfural oil was added, heated to 155°C, kept stirring for 30 minutes, 8 parts by weight of waste rubber powder was added, kept stirring at 155°C for 40 minutes, and 4.5 parts by weight of SBS was added. Styrene-butadiene rubber, keep stirring at 155°C for 40 minutes, add 1 part by weight of Sasobit, keep stirring at 155°C for 40 minutes, then add 0.06 parts by weight of NH4L type crosslinking agent, heat up to 170°C, keep stirring for 20 minutes, and then grind with a colloid mill, After grinding for 50 minutes, the temperature was lowered to 140° C., and stirred for 70 minutes to obtain modified asphalt.

[0051] The modified asphalt obtained in Example 2 was tested for performance, and the results obtained are shown in Table 1.

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Abstract

The invention provides modified asphalt as well as a preparation method thereof. The preparation method comprises the following step: mixing, heating and stirring 70-90 parts of asphalt, 3.0-30 parts of aromatic hydrocarbon oil, 2.0-20 parts of waste rubber powder, 1.0-10 parts of rubber, 0.5-10 parts of Sasobit and 0.05-0.5 part of a crosslinking agent to obtain the modified asphalt. Compared with the prior art, polymer rubber, waste rubber powder, aromatic hydrocarbon oil, Sasobit and the crosslinking agent are adopted to jointly modify the asphalt. The rubber has better low temperature performance and can improve the low temperature ductility of the asphalt, and meanwhile, does not damage other pavement performances of the asphalt. The aromatic hydrocarbon oil has higher swelling capacity to the rubber and the waste rubber powder, so that the compatibility of the asphalt and modification materials is improved. The crosslinking agent can further improve the high temperature storage stability of a finished product so as to prevent separation. Sasobit can reduce the construction temperature of the asphalt.

Description

technical field [0001] The invention belongs to the technical field of asphalt, in particular to a modified asphalt and a preparation method thereof. Background technique [0002] Asphalt is the main pavement material used in road engineering at home and abroad. The characteristics of modern road traffic are large traffic flow, fast speed and high load capacity, so the requirements for road surface quality are constantly improving. Common asphalt materials generally have the disadvantages of high penetration, low ductility and low softening point in the engineering range, which are manifested in poor compression and crack resistance, poor plasticity, high temperature sensitivity, and narrow working temperature range. Since it is difficult for ordinary asphalt to meet the requirements of modern road traffic for pavement quality, in recent years, there have been modified asphalts that are superior to ordinary asphalt in various aspects. Adding natural or synthetic organic or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L9/06C08L21/00C08L23/00C08K5/01
Inventor 叶成光李金英
Owner SHANDONG JINSHI BITUMEN CO LTD
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