Compound SBS (styrene butadiene styrene) modified asphalt and production process thereof

A technology of modified asphalt and production process, applied in building components, building insulation materials, buildings, etc., can solve problems such as affecting road construction quality, softening point reduction, performance attenuation, etc., to reduce development time, save time and cost, and improve Effects of softening point and ductility

Active Publication Date: 2014-12-10
广西国创道路材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This high-elasticity modified asphalt has good high-temperature performance, low-temperature deformation resistance and anti-fatigue performance. However, when the high-elasticity modified asphalt is transported to the construction site for a long distance (transportation time exceeds 12 hours), its performance is seriously attenuated. Severe aging, easy to crack, and the softening point is greatly reduced, seriously affecting the quality of road construction

Method used

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  • Compound SBS (styrene butadiene styrene) modified asphalt and production process thereof
  • Compound SBS (styrene butadiene styrene) modified asphalt and production process thereof
  • Compound SBS (styrene butadiene styrene) modified asphalt and production process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1) Heat 6780kg of 70# base asphalt to 180°C to make it fully swell and become molten;

[0021] 2) Heat 2500kg of 50# base asphalt to 180°C to make it fully swell and become molten;

[0022] 3) Put the swollen 70# matrix asphalt into the working tank, add 350kg of star-shaped SBS, 300kg of dibutyl phthalate (DBP), and 50kg of rubber powder, stir evenly, and pass through the colloid mill for three times of high-speed shearing to obtain Mixture;

[0023] 4) Put the mixture into the development tank, develop at 180°C for 0.5h, add 20kg of sulfur and 2500kg of swollen 50# matrix asphalt, cool down to 170°C and develop for 0.5h, that is, the compound SBS modified asphalt semi-finished product , sampling inspection;

[0024] 5) Put the semi-finished product of SBS modified asphalt into the insulation tanker, and continue to grow during the process of transportation to the construction site. The transportation time is 12 hours. When the temperature drops by 5°C when it arriv...

Embodiment 2

[0035] 1) Heat 6780kg of 70# base asphalt to 190°C to make it fully swell and become molten;

[0036] 2) Heat 2500kg of 50# base asphalt to 185°C to make it fully swell and become molten;

[0037] 3) Put the swollen 70# base asphalt into the working tank, add 350kg of linear SBS, 300kg of dioctyl phthalate (DOP), and 50kg of rubber powder, stir evenly, and pass through the colloid mill for three times of high-speed shearing to obtain Mixture;

[0038] 4) Put the mixture into the development tank, develop at 185°C for 1.5h, add 20kg of sulfur and 2500kg of swollen 50# matrix asphalt, cool down to 180°C and develop for 1.5h, which is the compound SBS modified asphalt semi-finished product;

[0039] 5) Put the SBS modified asphalt semi-finished product into the insulation tanker, and continue to grow during the transportation to the construction site. The transportation time is 16 hours. When the temperature drops by 5°C when it arrives at the site, the compound SBS modified a...

Embodiment 3

[0051] 1) Heat 6650kg of 70# base asphalt to 185°C to make it fully swell and become molten;

[0052] 2) Heat 2500kg of 50# base asphalt to 185°C to make it fully swell and become molten;

[0053] 3) Pour the swollen 70# matrix asphalt into the working tank, add 380kg of star-shaped and linear mixed SBS, 400kg of dioctyl phthalate (DOP), and 50kg of rubber powder, stir evenly, and pass through the colloid mill for high-speed shearing 3 times, to obtain the mixture;

[0054] 4) Put the mixture into the development tank, develop it at 185°C for 1 hour, add 20kg of sulfur and swollen 50# matrix asphalt, cool down to 175°C and develop it for 1 hour, then the compound SBS modified asphalt semi-finished product;

[0055] 5) Put the SBS modified asphalt semi-finished product into the insulation tanker, and continue to develop during the transportation to the construction site. The transportation time is 14 hours. When the temperature drops by 5°C when it arrives at the site, the com...

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Abstract

The invention provides compound SBS (styrene butadiene styrene) modified asphalt. The compound SBS modified asphalt consists of 70# matrix asphalt, 50# matrix asphalt, an SBS modifier, a plasticizer, an anti-ageing agent and a stabilizer. A production process for the compound SBS modified asphalt comprises the following steps: swelling the 70# matrix asphalt and then adding the SBS modifier, the anti-ageing agent and the plasticizer, uniformly stirring, passing the mixture through a colloid mill to shear at a high speed to obtain a material mixture; growing the material mixture for 0.5-1.5 hours at 180-185 DEG C, adding the stabilizer and the swelled 50# matrix asphalt, cooling to 170-180 DEG C to grow for 0.5-1.5 hours, and continuously growing for 12-16 hours in a process of loading and transporting to a construction site to obtain the compound SBS modified asphalt. In a long-distance transportation process, the performance of the modified asphalt is not weakened, but improved, so that not only are a softening point and ductility are high, but also separation is not easy.

Description

technical field [0001] The invention relates to the technical field of road pavement materials, in particular to a composite SBS modified asphalt and a production process thereof. Background technique [0002] With the rapid development of modern transportation, through the unremitting efforts of the majority of road workers, modified asphalt technology has achieved rapid development, especially the promulgation of "Technical Specifications for Road Modified Asphalt Pavement Construction" (JTJ036-98), marking my country's The modified asphalt technology has been developed from the laboratory test and demonstration stage to the promotion and application stage. SBS modified asphalt is widely recognized for its excellent high and low temperature performance, but due to the poor stability of SBS modified asphalt itself, in the actual production process, plasticizers, stabilizers and anti-aging agents are added for modification. Enhance its modification effect. Since the modific...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L53/02C08K5/12C08K3/06
Inventor 杨鹰陈亮刘宇范春华侯海元仲春南梁延明杨荣学石孟轲李谋玉涂娟
Owner 广西国创道路材料有限公司
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