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Modified asphalt and preparation method thereof

A technology of modified asphalt and matrix asphalt, which is applied in building components, building insulation materials, buildings, etc., can solve the problems of high cost and difficulty in meeting the requirements of asphalt pavement performance, and achieve stable performance, easy industrial production, and reduce pollution.

Inactive Publication Date: 2019-03-19
刘景章
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] With the development of modern transportation, the performance of traditional asphalt pavement is becoming more and more difficult to meet the requirements. At present, continuous modification of asphalt is generally used to improve the corresponding performance. At present, SBS modification is mainly used, although it has certain effects on extension and stability. Improvement effect, but the cost is high, and the performance still needs to be further improved

Method used

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  • Modified asphalt and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A modified asphalt, comprising the following raw materials in parts by weight: 80 parts of base asphalt, 10 parts of waste rubber, 12 parts of kalpheline, 7 parts of chitin fiber, 5 parts of hexafluoropropylene, diethylene glycol distearate 2 parts of ester, 1 part of acetyl trioctyl citrate, 1 part of azobisisobutyronitrile.

[0022] A preparation method of modified asphalt, comprising the following steps:

[0023] (1) carry out mixed pulverization after kalcine stone and waste rubber are dried, cross 100 mesh sieves;

[0024] (2) Add the base asphalt into the stirring tank and heat it to 90°C, add the product from step (1) and stir at 400rpm for 20min;

[0025] (3) Add hexafluoropropylene, diethylene glycol distearate, acetyl trioctyl citrate and azobisisobutyronitrile in sequence to step (2), and stir for 1 hour at 120°C and 900rpm;

[0026] (4) Reduce the temperature in step (3) to 110° C., add chitin fiber, and stir at 2000 rpm for 2-3 hours.

Embodiment 2

[0028] A modified asphalt, comprising the following raw materials in parts by weight: 85 parts of base asphalt, 13 parts of waste rubber, 13 parts of kalpheline, 8 parts of chitin fiber, 5.2 parts of hexafluoropropylene, diethylene glycol distearate 2.3 parts of ester, 1.5 parts of acetyl trioctyl citrate, 1.4 parts of azobisisobutyronitrile.

[0029] A preparation method of modified asphalt, comprising the following steps:

[0030] (1) carry out mixed pulverization after kapinestone and waste rubber are dried, cross 125 mesh sieves;

[0031] (2) Add the base asphalt into the stirring tank and heat it to 91°C, add the product from step (1) and stir at 450rpm for 25min;

[0032] (3) Add hexafluoropropylene, diethylene glycol distearate, acetyl trioctyl citrate and azobisisobutyronitrile in sequence to step (2), and stir for 1.25 h at 122°C and 950 rpm;

[0033] (4) Reduce the temperature in step (3) to 112°C, add chitin fiber, and stir at 2250rpm for 2.25h.

Embodiment 3

[0035] A modified asphalt, comprising the following raw materials in parts by weight: 90 parts of base asphalt, 15 parts of waste rubber, 14 parts of kalpheline, 9 parts of chitin fiber, 5.5 parts of hexafluoropropylene, diethylene glycol distearate 2.5 parts of ester, 2 parts of acetyl trioctyl citrate, 1.5 parts of azobisisobutyronitrile.

[0036] A preparation method of modified asphalt, comprising the following steps:

[0037] (1) carry out mixed pulverization after kalcine stone and waste rubber are dried, cross 150 mesh sieves;

[0038] (2) Add the base asphalt into the stirring tank and heat it to 93°C, add the product from step (1) and stir at 500rpm for 30min;

[0039] (3) Add hexafluoropropylene, diethylene glycol distearate, acetyl trioctyl citrate and azobisisobutyronitrile sequentially to step (2), and stir for 1.5 h at 125° C. and 1000 rpm;

[0040] (4) Reduce the temperature in step (3) to 110-120° C., add chitin fibers, and stir at 2500 rpm for 2.5 hours.

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Abstract

The invention discloses a modified asphalt and a preparation method thereof. The modified asphalt is composed of raw materials including, by weight part, 80-100 parts of matrix asphalt, 10-20 parts ofwaste rubber, 12-16 parts of kaliophilite, 7-11 parts of chitosan fiber, 5-7 parts of hexafluoropropylene, 2-4 parts of diethylene glycol distearate, 1-3 parts of trioctyl acetylcitrate and 1-2 partsof azodiisobutyronitrile. The modified asphalt is prepared from the raw materials of matrix asphalt, waste rubber, kaliophilite, chitosan fiber, hexafluoropropylene, diethylene glycol distearate, trioctyl acetylcitrate and azodiisobutyronitrile, thereby making full use of the waste rubber, reducing pollution and saving resources; the prepared modified asphalt is high in tensile performance and softening point, significantly improved in overall performance and relatively stable in performance at low temperature. The preparation method of the modified asphalt is simple in process, applicable toindustrial production and worthwhile generalizing.

Description

technical field [0001] The invention relates to an asphalt, in particular to a modified asphalt and a preparation method thereof. Background technique [0002] Asphalt is a dark brown complex mixture composed of hydrocarbons of different molecular weights and their non-metallic derivatives. It is a kind of high-viscosity organic liquid. It is liquid with a black surface and is soluble in carbon disulfide. Asphalt is a waterproof, moisture-proof and anti-corrosion organic gelling material. Asphalt is mainly used in coatings, plastics, rubber and other industries as well as paving roads. [0003] With the development of modern transportation, the performance of traditional asphalt pavement is becoming more and more difficult to meet the requirements. At present, continuous modification of asphalt is generally used to improve the corresponding performance. At present, SBS modification is mainly used, although it has certain effects on extension and stability. Improvement effe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L21/00C08L5/08C08K13/02C08K3/34C08K5/103C08K5/11
CPCC08L95/00C08L2205/03C08L2205/16C08L21/00C08L5/08C08K13/02C08K3/34C08K5/103C08K5/11
Inventor 刘景章
Owner 刘景章
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