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High-modulus asphalt based on natural asphalt modification, as well as preparation method and application thereof

A natural asphalt, high modulus technology, applied in building components, building insulation materials, buildings, etc., can solve the problem that high modulus asphalt mixture has not been widely applied and popularized Problems such as application promotion and rising production costs can be achieved to improve the ability to resist permanent deformation, save construction costs, and improve the durability of the pavement

Inactive Publication Date: 2015-06-24
JIANGSU SOBUTE NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Although the research on high-modulus asphalt and its mixture has achieved preliminary results in my country, the idea of ​​research on high-modulus asphalt mixture in China is mainly to increase the modulus of the mixture by adding high-modulus admixtures. The modulus admixture is mainly based on the French PR. high modulus additives. In terms of market application, the French PR series high modulus additives are still the main ones. Due to the high price and high dosage of imported high modulus additives, the production cost is caused. As a result, high modulus asphalt mixture has not been widely used in my country
In addition, there is no uniform definition standard and evaluation system for high modulus asphalt mixture, which also leads to the large-scale application and promotion of high modulus asphalt mixture in my country.

Method used

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  • High-modulus asphalt based on natural asphalt modification, as well as preparation method and application thereof
  • High-modulus asphalt based on natural asphalt modification, as well as preparation method and application thereof
  • High-modulus asphalt based on natural asphalt modification, as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Example 1 Preparation of high modulus asphalt

[0039]Heat the base asphalt at 140°C for 1.5h, and at the same time, heat the crushed natural asphalt at 150°C for 0.5h to flow state; slowly pour the flow state of natural asphalt into the heated base asphalt, and pour SEBS at the same time Modifiers, stabilizers and compatibilizers, shear at 160°C for 2 hours with a high-speed shearing machine; and incubate the product at 140°C for 1.5 hours.

[0040] Among them, heavy traffic 70# asphalt is used as base asphalt;

[0041] The natural asphalt is Trinidad Lake asphalt;

[0042] The mass ratio of lake asphalt to base asphalt in high modulus asphalt is 45:55;

[0043] The amount of SEBS modifier accounts for 1.5% of the mass of high modulus asphalt, dicumyl peroxide (DCP) accounts for 0.8% of the mass of high modulus asphalt, and compatibilizer accounts for 0.4% of the mass of high modulus asphalt;

Embodiment 2

[0044] Example 2 Preparation of high modulus asphalt

[0045] Heat the base asphalt at 130°C for 2 hours, and at the same time, heat the crushed natural asphalt at 140°C for 1 hour to flow state; slowly pour the flow state of natural asphalt into the heated base asphalt, and at the same time pour SEBS modified Agents, stabilizers and compatibilizers, cut with a high-speed shear for 3 hours at 150°C; and incubate the product at 130°C for 2 hours.

[0046] Among them, heavy traffic 90# asphalt is used as base asphalt;

[0047] The natural asphalt is Trinidad Lake asphalt;

[0048] The mass ratio of lake asphalt to base asphalt in high modulus asphalt is 50:50;

[0049] The amount of SEBS modifier accounts for 2.0% of the mass of high modulus asphalt, triallyl isocyanurate (TAIC) accounts for 1.0% of the mass of high modulus asphalt, and compatibilizer accounts for 0.5% of the mass of high modulus asphalt ;

Embodiment 3

[0050] Example 3 Preparation of high modulus asphalt

[0051] Heat the base asphalt at 150°C for 1 hour, and at the same time, heat the crushed natural asphalt at 160°C for 0.5 hour to flow state; slowly pour the flow state of natural asphalt into the heated base asphalt, and pour SEBS modified Stabilizers, stabilizers and compatibilizers, sheared with a high-speed shear for 1.5 hours at 170°C; the product was incubated at 150°C for 1 hour.

[0052] Among them, heavy traffic 70# asphalt is used as base asphalt;

[0053] The natural asphalt is Trinidad Lake asphalt;

[0054] The mass ratio of lake asphalt to base asphalt in high modulus asphalt is 40:60;

[0055] The amount of SEBS modifier accounts for 1.0% of the mass of high modulus asphalt, glycidyl methacrylate (GMA) accounts for 1.0% of the mass of high modulus asphalt, and compatibilizer accounts for 0.3% of the mass of high modulus asphalt;

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Abstract

The invention provides high-modulus asphalt based on natural asphalt modification. The high-modulus asphalt is prepared by modifying natural asphalt with SEBS modifying agent, stabilizing agent, compatilizer and matrix asphalt, wherein the weight ratio of the natural asphalt to the matrix asphalt is (40-50):(50-60), the SEBS modifying agent is 1-3 percent of the total mass of the natural asphalt and the matrix asphalt, the stabilizing agent is 0.5-1.0 percent of the total mass of the natural asphalt and the matrix asphalt, and the compatilizer is 0.3-0.5 percent of the total mass of the natural asphalt and the matrix asphalt. The invention further provides a preparation method and application of the high-modulus asphalt. The high-modulus asphalt is simple in preparation process and low in cost, can be used for effectively improving the permanent deformation resistance, shearing resistance, high-temperature track resistance, water damage resistance and fatigue performance of asphalt mixture and achieving double aims of improving high-temperature track resistance and pavement durability of the asphalt pavement, and reducing construction cost in the total life cycle.

Description

technical field [0001] The invention belongs to the field of road building materials, and in particular relates to a high modulus asphalt based on natural asphalt modification and a preparation method thereof. Background technique [0002] At present, heavy-duty traffic is common in my country's road traffic. Under heavy-duty traffic, asphalt pavement is prone to early damage, such as high-temperature rutting, cracks, pushing, hugging and other diseases. Therefore, how to effectively improve the anti-deformation ability of asphalt mixture materials and the cohesive force between binder and aggregate has become the key to solving early pavement diseases. [0003] High Modulus Asphalt Concrete (HMAC) originated in France in the 1960s. It mainly uses low-grade hard asphalt as the main binder, and has high asphalt content, low porosity, and stiffness modulus. Large, continuous gradation characteristics. The definition of high modulus asphalt mixture in France is: dynamic modul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L53/02C08L51/00C08K5/14C08K5/3492C08K5/1515C04B24/36C04B26/26E01C19/08
Inventor 洪锦祥耿磊张德育蔡广楠林俊涛陈香张苏龙熊子佳
Owner JIANGSU SOBUTE NEW MATERIALS
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