Rubber asphalt, low-carbon rubber foamed asphalt, rubber asphalt mixture and preparation method thereof

A rubber asphalt and rubber foaming technology, which is applied in the fields of rubber asphalt mixture and its preparation, rubber asphalt, and low-carbon rubber foamed asphalt, can solve problems such as the performance impact of asphalt and asphalt mixture, and achieve significant environmental protection benefits and healthy Favorable, excellent wetting ability and cohesion

Active Publication Date: 2021-11-26
广西新发展交通集团有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This scheme uses organic viscosity-reducing warm-mix technology to improve the performance of conventional warm-mix rubber asphalt, but chlorinated paraffin, polyethylene, and stearic acid will affect the performance of asphalt and asphalt mixture

Method used

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  • Rubber asphalt, low-carbon rubber foamed asphalt, rubber asphalt mixture and preparation method thereof
  • Rubber asphalt, low-carbon rubber foamed asphalt, rubber asphalt mixture and preparation method thereof

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preparation example Construction

[0064] Further, the present invention also provides a method for preparing rubber asphalt, which includes the step of mixing the components of the rubber asphalt.

[0065] Specifically, the preparation method of described rubber asphalt comprises the following steps:

[0066] placing the rubber powder in a carbon tetrachloride solution and / or an alkali solution for surface treatment to obtain surface-treated rubber powder;

[0067] The surface-treated rubber powder, polymer modifier and asphalt matrix are mixed to obtain rubber asphalt. Further, the mixing includes the step of mixing the surface-treated rubber powder, the polymer modifier and the asphalt base using a high-speed shear stirring method.

[0068] The present invention does not specifically limit the conditions of high-speed shearing. Specifically, a high-speed shearing machine can be used to shear at 160-180° C. for 30-60 minutes, and the shearing rate can be 4000-5000 r / min.

[0069]

[0070] A second aspect...

Embodiment 1

[0093] Using carbon tetrachloride reagent, first surface-treat 40 mesh rubber powder, soak the rubber powder in carbon tetrachloride reagent at room temperature for 4 hours, separate the rubber powder, and dry the rubber powder in an oven at 105°C to constant weight to obtain surface-treated rubber powder.

[0094] Based on the total mass of the asphalt rubber as 100%, the amount of surface-treated rubber powder is 17%, the content of SBS modifier is 1.5%, and the balance is asphalt matrix. Heat the asphalt base to 180°C, add surface-treated rubber powder and SBS modifier and mix to obtain a mixed precursor; put the mixed precursor into a mixer and stir to fully swell, and the swelling reaction time is 50 minutes before use Rubber asphalt was prepared by high-speed shear mixing. Wherein, the high-speed shearing stirring method is to use a high-speed shearing machine to shear at 175° C. for 50 minutes, and the shearing rate is 4500 r / min.

[0095] Based on the total mass of t...

Embodiment 2

[0101] Using saturated NaOH solution reagent, first surface-treat 40 mesh rubber powder, soak the rubber powder in saturated NaOH solution for 4 hours at room temperature, separate the rubber powder, and dry the rubber powder in an oven at 105°C to constant weight , to obtain surface-treated rubber powder.

[0102] Based on the total mass of the asphalt rubber as 100%, the amount of rubber powder for surface treatment is 17%, the content of SBS modifier is 1.5%, and the balance is asphalt matrix. Heat the asphalt base to 180°C, add surface-treated rubber powder and SBS modifier and mix to obtain a mixed precursor; put the mixed precursor into a mixer and stir to fully swell, and the swelling reaction time is 50 minutes before use Rubber asphalt was prepared by high-speed shear mixing. Wherein, the high-speed shearing stirring method uses a high-speed shearing machine to shear for 50 minutes at 175° C., and the shearing rate is 4500 r / min.

[0103] Add 2‰ of vinyltrimethoxysi...

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Abstract

The invention provides rubber asphalt, low-carbon rubber foamed asphalt, a rubber asphalt mixture and a preparation method thereof. The rubber asphalt comprises the following components: surface-treated rubber powder, a polymer modifier and an asphalt matrix, wherein the rubber powder subjected to surface treatment is rubber powder subjected to surface treatment by carbon tetrachloride and/or an alkaline agent. The rubber asphalt provided by the invention has low surface free energy, and the wettability and adhesiveness after foaming are improved. The rubber asphalt mixture disclosed by the invention can be used for greatly reducing the emission of toxic gas, so that the influence of rubber asphalt pavement construction on the surrounding environment and construction operators is reduced. Meanwhile, influence on the environment and the health of constructors are extremely reduced, and the environmental protection benefit is very remarkable.

Description

technical field [0001] The invention relates to rubber asphalt, low-carbon rubber foamed asphalt, rubber asphalt mixture and a preparation method thereof, belonging to the field of road construction. Background technique [0002] Rubber asphalt mixture is an environmentally friendly pavement material because it uses a large amount of waste tire rubber powder. However, the actual mixing temperature during the actual rubber asphalt pavement construction is as high as 190°C, which will consume a large amount of natural gas and produce a large amount of harmful and toxic substances such as greenhouse gases and asphalt fumes. [0003] In the prior art, rubber asphalt mixture can be prepared by using rubber asphalt warm mixing technology. That is to add various chemical warm mix agents to rubber asphalt, and then prepare rubber asphalt mixture. Various warm mix agents (chemical additives or organic additives, zeolite) will have varying degrees of impact on the performance of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/26C04B38/10C04B20/02C04B18/22C04B111/40
CPCC04B26/26C04B38/10C04B20/023C04B18/22C04B2111/40C04B2111/0075C04B24/24C04B24/40C04B24/32C04B14/02C04B18/141Y02W30/91Y02A30/30
Inventor 谢树志李瑞娇徐剑黄彦鑫常嵘王杰
Owner 广西新发展交通集团有限公司
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