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Preparation method for high-viscosity modified asphalt

A modified asphalt, high-viscosity technology, used in building components, building insulation materials, buildings, etc., can solve the problems of not significantly reducing the amount of polymer added, not fundamentally solving the compatibility problem, etc., and achieve excellent high temperature The effect of anti-flow performance, low-temperature use performance and aging resistance, easy construction, and simple preparation method

Active Publication Date: 2014-05-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although different methods have been adopted in the above patents to improve the compatibility between the polymer and asphalt, the amount of polymer added has not been significantly reduced, and the compatibility problem has not been fundamentally solved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Cut SBR, part of amine polyphosphate and aromatic oil at 70°C with a high-emulsification shearer (1500-3000r / min) for 40 minutes to prepare the extension agent mother liquor. Wherein step (1) adds 12% of polyphosphate amine quality.

[0022] (2) Add the extender mother liquor and the remaining ammonium polyphosphate prepared in step (1) to 70# asphalt at a temperature of 130°C and stir for 60 minutes to obtain a high-viscosity modified asphalt. The ratio of raw materials and product properties are shown in Table 1.

Embodiment 2

[0024] (1) Cut SBS (YH-791), part of polyphosphoric acid and aromatic oil at 80°C with a high-emulsification shearer (1500-3000r / min) for 50 minutes to prepare the extension agent mother liquor . Wherein step (1) adds 15% of polyphosphoric acid mass.

[0025] (2) Add the extender mother liquor and the remaining polyphosphoric acid prepared in step (1) to 70# asphalt at a temperature of 140°C, and stir for 60 minutes to obtain a high-viscosity modified asphalt. The ratio of raw materials and product properties are shown in Table 1.

Embodiment 3

[0027] (1) Cut SBR, some polyphosphoric acid and aromatic oil at 70°C with a high-emulsification shearer (1500-3000r / min) for 50 minutes to prepare the extension agent mother liquor. Wherein step (1) adds 18% of polyphosphoric acid mass.

[0028] (2) Add the extender mother liquor and the remaining polyphosphoric acid prepared in step (1) to 70# asphalt at a temperature of 150°C and stir for 60 minutes to prepare high-viscosity modified asphalt. The ratio of raw materials and product properties are shown in Table 1.

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Abstract

The invention discloses a preparation method for a high-viscosity modified asphalt. The method comprises the following steps: (1) mixing uniformly a ductility improver, partial chemical modifier, and aromatic oil to prepare a ductility improver mother liquid; (2) mixing the ductility improver mother liquid, the left chemical modifier and matrix asphalt to react to obtain the high-viscosity modified asphalt. The chemical modifier is one or more of orthophosphoric acid, polyphosphoric acid, polyphosphoric acid, or amine polyphosphate. According to the high-viscosity modified asphalt prepared by the chemical modification method, the storage stability of the high-viscosity modified asphalt is improved, the cost is low, and the preparation method is simple and is easy to implement.

Description

technical field [0001] The invention relates to a method for preparing high-viscosity modified asphalt, in particular to a method for preparing high-viscosity asphalt through chemical modification. Background technique [0002] High-viscosity modified asphalt refers to the modified asphalt whose absolute viscosity is greater than 20,000 Pa·s at 60°C. Because of its good high-temperature stability, low-temperature crack resistance, oxidation resistance and good construction workability, it is widely used For porous drainage asphalt pavement (OGFC) and asphalt macadam mixture (SMA) pavement. At present, it is mainly obtained by adding a large amount (8%~12%) of polymer modification to petroleum asphalt. Adding polymers to modify petroleum asphalt can significantly improve the high and low temperature performance of asphalt, and provide high temperature anti-rutting and low temperature anti-cracking capabilities of asphalt pavement. However, due to the differences in molecula...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L7/00C08L9/06C08L11/00C08L53/02C08L53/00C08K3/32C08K5/01
Inventor 宣根海陈杰徐青柏万淼
Owner CHINA PETROLEUM & CHEM CORP
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