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Composite modified asphalt and preparation method thereof

A technology of compound modified asphalt and bitumen, applied in building components, building insulation materials, buildings, etc., can solve the problems of reducing the high and low temperature performance of rubber asphalt, application limitations, and high SBS price, and achieves improved compatibility and comprehensive performance. , Improve the effect of high and low temperature performance

Inactive Publication Date: 2021-04-13
GUANGXI TRANSPORTATION SCI & TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] On the one hand, studies have shown that the surface roughness and activity of rubber powder can be improved by activating rubber powder, so as to improve the compatibility between rubber powder and asphalt, reduce the viscosity of rubber asphalt, and improve its workability; However, this method will reduce the high and low temperature performance of rubber asphalt
On the other hand, SBS (styrene-butadiene-styrene block copolymer) is a widely used and mature road asphalt modifier, which can significantly improve the high and low temperature performance of asphalt pavement; Its application is limited

Method used

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  • Composite modified asphalt and preparation method thereof

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preparation example Construction

[0043] The present invention also provides a preparation method of the composite modified asphalt described in the above technical scheme, comprising the following steps:

[0044] Swelling after mixing the base asphalt with SBS, stabilizer and anti-aging agent in sequence to obtain swollen asphalt;

[0045] Shearing and developing the swelled asphalt in sequence to obtain developed asphalt;

[0046] The developed asphalt is mixed with the activated rubber powder and the solubilizer in sequence, and then sheared and developed in sequence to obtain the composite modified asphalt.

[0047] In the invention, the matrix asphalt is mixed with SBS, stabilizer and anti-aging agent in sequence, and then swelled to obtain swollen asphalt.

[0048] In the present invention, the base asphalt is preferably placed in an oven at 140-150°C and heated to a fluid state, taken out and placed on a heating device, and then SBS, stabilizer and anti-aging agent are sequentially added under stirring...

Embodiment 1

[0086] Embodiment 1: Activated rubber powder (twin-screw extrusion granulation method) / SBS composite modified asphalt

[0087] The activated rubber powder / SBS composite modified asphalt given in this embodiment is composed of the following raw materials in parts by weight: base asphalt (Maoming 70# base asphalt, softening point is 46 ° C, and penetration at 25 ° C is 70 (0.1 mm), 15°C ductility of 160cm) 79 parts, activated rubber powder 18 parts, SBS (1301 type SBS, produced by Sinopec Baling Petrochemical Company, S / B block ratio is 30:70, non-oil-extended product , molecular weight is 80,000~100,000) 1.5 parts, stabilizer (anhydrous calcium chloride, analytically pure, fineness is 800 mesh~1000 mesh) 0.5 part, solubilizer (the furfural extract oil produced by Hebei Hengshui Diyi Petroleum Company , specific gravity is 0.989-0.995, flash point is 250°C-260°C) 0.5 part and anti-aging agent (anti-aging agent 4010NA, specific gravity is 1.29-1.33, melting point is 100°C-110°C) ...

Embodiment 2

[0099] Embodiment 2: Activated rubber powder (twin-screw extrusion granulation method) / SBS composite modified asphalt

[0100] The difference between this embodiment and the above-mentioned embodiment 1 lies in the ratio of each raw material. The activated rubber powder / SBS composite modified asphalt that present embodiment provides is made up of following raw materials in parts by weight: 80 parts of base asphalt, 16.5 parts of activated rubber powder, 2 parts of SBS, 0.5 part of stabilizer, 0.5 part of solubilizer and 0.5 part of anti-aging agent.

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Abstract

The invention provides composite modified asphalt as well as a preparation method and application thereof, and belongs to the field of road building materials. The composite modified asphalt provided by the invention comprises the following components in parts by weight: 72-84 parts of matrix asphalt, 15-25 parts of activated rubber powder, 0.5-2 parts of SBS, 0.1-0.8 part of a stabilizer, 0.1-0.6 part of a solubilizer and 0.1-0.6 part of an anti-aging agent. Aiming at the defects of common rubber asphalt, the invention designs the economical activated rubber powder / SBS composite modified asphalt with balanced performance by adopting matrix asphalt, activated rubber powder, SBS, a stabilizer, a solubilizer and an anti-aging agent, and the asphalt has the advantages of excellent high-temperature and low-temperature performance, proper viscosity and better storage stability.

Description

technical field [0001] The invention relates to the technical field of road building materials, in particular to a composite modified asphalt and a preparation method thereof. Background technique [0002] In recent years, with the promotion of industrial production of rubber powder and the in-depth research on pavement structure, rubber powder, as a new type of asphalt modifier, has excellent high-temperature anti-rutting, low-temperature anti-cracking, good durability, and reduces road noise. As well as a series of environmental protection meanings such as effective recycling, it has been widely used in road construction. However, due to the inert surface of rubber powder, its compatibility with asphalt is poor, and rubber asphalt is easy to segregate; and the modification effect is not obvious when the rubber powder content is low, and the modified asphalt viscosity is high when the rubber powder content is high , The construction temperature is high and the construction...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L53/02C08L21/00C08K3/16C08K5/18
CPCC08L95/00C08L2205/035C08L2201/08C08K2003/162C08L2555/10C08L53/02C08L21/00C08K3/16C08K5/18
Inventor 谭华张洪刚袁海涛王彬张红波谭继宗熊保林熊剑平陈华鑫况栋梁覃兴
Owner GUANGXI TRANSPORTATION SCI & TECH GRP CO LTD
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