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High-viscosity modified pitch and preparation method thereof

A modified asphalt, high-viscosity technology, applied in building components, building insulation materials, construction, etc., can solve the problems of unverified reliability, unstable product performance, and poor engineering practicability, and achieve low production cost and cost-effectiveness High and simple preparation method

Active Publication Date: 2015-12-02
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Several domestic high-viscosity modifier patents have not been widely promoted due to unstable product performance or construction reasons, and its reliability cannot be verified. Whether it can achieve the effect mentioned in the patent is uncertain, and the engineering practicability is not strong.

Method used

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  • High-viscosity modified pitch and preparation method thereof
  • High-viscosity modified pitch and preparation method thereof
  • High-viscosity modified pitch and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0021] The high-viscosity modified asphalt in this example is made from the following raw materials in parts by weight: 100 parts of base asphalt, 6 parts of styrene copolymer, 3 parts of Sasobit asphalt modifier, 1 part of Eucommia gum, 2 parts of styrene-butadiene rubber, and 0.4 parts of sulfur parts; the styrene copolymer is preferably a star-shaped styrene-butadiene-styrene block copolymer.

[0022] The method for preparing high-viscosity modified asphalt in this embodiment comprises the following steps:

[0023] Step 1. After heating the base asphalt to 150°C, add styrene copolymer and Eucommia gum and stir evenly, then add Sasobit asphalt modifier and styrene-butadiene rubber and stir evenly to obtain a mixture; the base asphalt is preferably SK-90# asphalt ;

[0024] Step 2: Cut the mixture described in Step 1 at a temperature of 175°C for 60 minutes, then add sulfur to continue shearing for 30 minutes, and then develop it at a temperature of 175°C for 4 hours to obta...

Embodiment 2

[0030] The high-viscosity modified asphalt in this embodiment is made from the following raw materials in parts by weight: 100 parts of base asphalt, 7 parts of styrene copolymer, 3 parts of Sasobit asphalt modifier, 1 part of Eucommia gum, 2 parts of styrene-butadiene rubber, and 0.4 parts of sulfur parts; the styrene copolymer is preferably a star-shaped styrene-butadiene-styrene block copolymer.

[0031] The method for preparing high-viscosity modified asphalt in this embodiment comprises the following steps:

[0032] Step 1. Heat the base asphalt to 160°C, add styrene copolymer and Eucommia gum and stir evenly, then add Sasobit asphalt modifier and styrene-butadiene rubber and stir evenly to obtain a mixture; the base asphalt is preferably SK-90# asphalt ;

[0033] Step 2: Cut the mixture described in Step 1 for 45 minutes at a temperature of 185°C, then add sulfur and continue to cut for 15 minutes, and then develop it for 1 hour at a temperature of 185°C to obtain high-...

Embodiment 3

[0035] The high-viscosity modified asphalt in this embodiment is made from the following raw materials in parts by weight: 100 parts of base asphalt, 5 parts of styrene copolymer, 4 parts of Sasobit asphalt modifier, 2 parts of Eucommia gum, 3 parts of styrene-butadiene rubber, and 0.8 parts of sulfur parts; the styrene copolymer is preferably a star-shaped styrene-butadiene-styrene block copolymer.

[0036] The method for preparing high-viscosity modified asphalt in this embodiment comprises the following steps:

[0037] Step 1. Heat the base asphalt to 155°C, add styrene copolymer and Eucommia gum and stir evenly, then add Sasobit asphalt modifier and styrene-butadiene rubber and stir evenly to obtain a mixture; the base asphalt is preferably SK-90# asphalt ;

[0038] Step 2: Cut the mixture described in step 1 at a temperature of 180°C for 55 minutes, then add sulfur to continue shearing for 25 minutes, and develop it at a temperature of 180°C for 2.5 hours after shearing ...

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Abstract

The invention discloses high-viscosity modified pitch which is prepared from the following raw materials in parts by weight: 100 parts of substrate asphalt, 4-9 parts of styrene copolymer, 2-5 parts of a Sasobit asphalt modifier, 0.5-3 parts of gutta-percha, 1-3 parts of butadiene styrene rubber and 0.2-1.5 parts of sulphur. Besides, the invention further discloses a method for preparing the high-viscosity modified pitch. The method comprises the following steps: 1, heating substrate asphalt, adding styrene copolymer and gutta-percha, uniformly stirring, then adding the Sasobit asphalt modifier and butadiene styrene rubber, and uniformly stirring to obtain a mixture; 2, shearing the mixture, adding sulphur, continuously shearing, and developing so as to obtain the high-viscosity modified pitch. The high-viscosity modified pitch has excellent high temperature stability, low temperature crack resistance and aging resistance, can be used for replacing expensive imported high-viscosity modified pitch under the condition of not influencing the road surface usability, and can be widely used for paving water-draining asphalt pavement.

Description

technical field [0001] The invention belongs to the technical field of road asphalt materials, and in particular relates to a high-viscosity modified asphalt and a preparation method thereof. Background technique [0002] Drainable asphalt mixture has been widely used in high-grade highways and urban expressways in Beijing, Shanghai, Guangdong and other provinces and cities in my country because of its good drainage, noise reduction, anti-skid and other road performance and environmental protection concept. The most critical material for laying drainage asphalt pavement is asphalt binder. Ordinary modified asphalt is used as the binder of drainage pavement, which has problems such as low viscosity, insufficient thickness of aggregate coating, and low durability of pavement under heavy-duty traffic. The high-viscosity modified asphalt application was born, and it became the best choice for asphalt used in drainage pavement. [0003] In view of the great influence of asphalt ...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L53/02C08L7/00C08L9/06C08K3/06
Inventor 郝培文王春汪海年彭子馨陈治君徐金枝张铭铭
Owner CHANGAN UNIV
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