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High-viscosity modified asphalt and preparation method thereof

A modified asphalt, high-viscosity technology, applied in building components, building insulation materials, construction, etc., can solve the problems of compatibility problems that have not been fundamentally solved, the amount of polymer added has not been significantly reduced, and achieve excellent high temperature Anti-flow performance, low-temperature performance and aging resistance, ease of construction, and cost reduction effects

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

[0024] (1) Cut SBR and aromatic oil at 70°C with a high emulsification shearer (1500-3000r / min) for 40 minutes to prepare the extender mother liquor.

[0025] (2) Add the extender mother liquor, amine polyphosphate and thiosemicarbazide 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

[0027] (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.

[0028] (2) Add the extender mother liquor, remaining polyphosphoric acid, and semicarbazide prepared in step (1) to 70# asphalt at a temperature of 140°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.

Embodiment 3

[0030] (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.

[0031] (2) Add the extender mother liquor, remaining polyphosphoric acid, and semicarbazide prepared in step (1) to 70# asphalt at a temperature of 150°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.

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Abstract

The invention discloses a high-viscosity modified asphalt and a preparation method thereof. The high-viscosity modified asphalt comprises the following components in parts by weight: 100 parts of matrix asphalt, 0.5-1.2 parts of a ductility improver, 3-6 parts of aromatic oil, 0.5-1.5 parts of a chemical modifier, and 0.1-1 part of a chemical additive, wherein the chemical modifier is one or more of orthophosphoric acid, polyphosphoric acid, polyphosphoric acid, or amine polyphosphate. The preparation method comprises the following steps: (1) mixing the ductility improver and the aromatic oil to prepare a ductility improver mother liquid; (2) mixing the ductility improver mother liquid, the chemical modifier, the chemical additive, and the matrix asphalt to react to prepare the high-viscosity modified asphalt. The high-viscosity modified asphalt is excellent in storage stability, high in viscosity at the temperature of 60 DEG C, and low in cost; the preparation method is simple and is easy to implement.

Description

technical field [0001] The invention relates to a high-viscosity modified asphalt and a preparation method thereof, in particular to a high-viscosity modified asphalt prepared by a chemical modification method and the method. 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...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L7/00C08L9/06C08L11/00C08L53/02C08L53/00C08K13/02C08K5/52C08K3/32C08K5/01C08K5/26C08K5/405
Inventor 宣根海陈杰徐青柏万淼
Owner CHINA PETROLEUM & CHEM CORP
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