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A kind of asphalt composite modification additive and its preparation method and asphalt modification method based on the additive

A compound modification and additive technology, which is applied in building components, building insulation materials, buildings, etc., can solve the problems of easy precipitation on the surface of materials, water absorption and deliquescence, degradation of asphalt road performance, and difficulty in processing flame retardants, etc., to achieve low cost , Excellent road performance, improve the effect of flammability

Active Publication Date: 2015-10-07
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, halogen-based flame retardants will release toxic gases when burned, and have poor smoke suppression performance; phosphorus-based flame retardants mostly contain red phosphorus, which is flammable during friction and collision, and the flame retardants have poor operability during processing; nitrogen Phosphorus composite intumescent flame retardants are difficult to process, are not resistant to migration, are easy to precipitate on the surface of the material, and absorb water and deliquescence. During processing, bubbles will be generated to cause expansion, etc.; inorganic flame retardants are mainly aluminum hydroxide or magnesium hydroxide, but if they want to achieve Higher oxygen index, the additive amount needs to be more than 60%, however, a large amount of additives will lead to a significant reduction in the road performance of asphalt

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  • A kind of asphalt composite modification additive and its preparation method and asphalt modification method based on the additive

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preparation example Construction

[0021] The preparation method of the asphalt composite modified additive of the present invention comprises the following steps: weighing 20-79.4% of coke powder, 19.8-79% of rock wool powder and 0.8-1.8% of coupling agent by mass percentage, and then Weigh ethanol with a mass concentration of 25-35%, then dilute the coupling agent with ethanol, then add coke gemstone powder and rock wool powder into the diluted coupling agent, stir evenly and soak, then heat to make the ethanol completely volatilize , and then cooled to obtain asphalt composite modification additive, wherein the mass ratio of ethanol to coupling agent is 3:1-5:1.

[0022] The soaking time is 30-60 minutes.

[0023] The asphalt modification method based on the asphalt composite modification additive of the present invention comprises the following steps: weighing a certain amount of asphalt and the asphalt composite modification additive, heating the asphalt to 150-170°C, and then adding the asphalt composite ...

Embodiment 1

[0027] The asphalt composite modifying additive is composed of 20% of coke powder, 79% of rock wool powder and 1% of zircoaluminate coupling agent in mass percentage.

[0028] The preparation method of the asphalt composite modification additive comprises the following steps: weighing 20% ​​of coke powder, 79% of rock wool powder and 1% of zircoaluminate coupling agent by mass percentage, and then weighing the mass concentration of 25% ethanol, then dilute the coupling agent with ethanol, then add coke powder and rock wool powder into the diluted zirconium aluminate coupling agent, stir evenly and soak for 30 minutes, then heat to make the ethanol completely volatilize, Then it is cooled to obtain the asphalt composite modification additive, wherein the mass ratio of ethanol to zircoaluminate coupling agent is 3:1.

[0029] The asphalt modification method based on the asphalt composite modification additive of the present invention comprises the following steps: weighing a cer...

Embodiment 2

[0031] The asphalt compound modification additive is composed of 79.4% by mass percentage of burnt stone powder, 19.8% of rock wool powder and 0.8% of zircoaluminate coupling agent.

[0032] The preparation method of the asphalt composite modification additive comprises the following steps: weighing 79.4% of coke powder, 19.8% of rock wool powder and 0.8% of zircoaluminate coupling agent by mass percentage, and then weighing the mass concentration of 30% ethanol, then dilute the zircoaluminate coupling agent with ethanol, then add coke powder and rock wool powder into the diluted zircoaluminate coupling agent, stir evenly and soak for 45 minutes, then heat to make the ethanol After it is completely volatilized, it is then cooled to obtain a composite modified additive for asphalt, in which the mass ratio of ethanol to zircoaluminate coupling agent is 4:1.

[0033] The asphalt modification method based on the asphalt composite modification additive of the present invention comp...

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Abstract

The invention discloses a composite asphalt modification additive, which consists of the following components in percentage by mass: 20 to 79.4 percent of flint clay powder, 19.8 to 79 percent of rock wool powder and 0.8 to 1.8 percent of coupling agent. The invention also provides a preparation method for the composite asphalt modification additive and a composite asphalt modification additive-based asphalt modification method. The composite asphalt modification additive prepared by the method can be used for modifying asphalt to improve the limit oxygen index of the asphalt.

Description

technical field [0001] The invention belongs to the technical field of road materials, and in particular relates to an asphalt composite modification additive, a preparation method thereof and an asphalt modification method based on the additive. Background technique [0002] Asphalt pavement materials have the advantages of comfortable driving, low noise, good skid resistance, and high traffic safety, and more and more asphalt pavement is used as tunnel pavement. However, the environment in the tunnel is relatively closed, the ventilation effect is poor, and the asphalt is flammable. Once a traffic accident occurs in the tunnel and causes a fire, it will cause heavy casualties and property losses. At the same time, the burning of asphalt will produce a large amount of smoke, accompanied by the release of toxic substances, which will inevitably cause environmental pollution and endanger the health of passengers and drivers. Therefore, in order to ensure the safety of asphal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08K9/04C08K3/22C08K3/34C08K7/12
Inventor 王朝辉郭滕滕孙晓龙高志伟李彦伟王新岐石鑫
Owner CHANGAN UNIV