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Dispersed asphalt regenerant and preparation method thereof

An asphalt regenerant, dispersing technology, applied in building components, building insulation materials, construction and other directions, can solve the problems of high proportion of new materials, difficult to achieve recycled asphalt mixture, low content of old materials, etc., to improve performance, The effect of strong environmental protection and low price

Inactive Publication Date: 2020-06-30
广州市市维新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, research and application at home and abroad in recent years have shown that although the rejuvenator can play an obvious reducing role after being fully mixed with aged asphalt under laboratory conditions, it is difficult to completely and evenly mix with aged asphalt during the short-term mixing in the production process. It makes it difficult for the recycled asphalt mixture in the production process to achieve the performance presented in the laboratory, and makes the proportion of new materials in production higher and the amount of old materials lower

Method used

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  • Dispersed asphalt regenerant and preparation method thereof
  • Dispersed asphalt regenerant and preparation method thereof
  • Dispersed asphalt regenerant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The present embodiment prepares a kind of dispersed asphalt regenerant, specifically comprises the following steps:

[0026] (1) Preparation of tall oil-based surfactant: select and weigh tall oil and concentrated sulfuric acid in a molar ratio of 1:0.3, put the tall oil in the reaction kettle, add concentrated sulfuric acid while stirring, and the reaction temperature is 45°C. The stirring speed is 450r / min, the reaction time is 45min, and the intermediate product is obtained; sodium hydroxide is added while stirring in the reaction kettle with the intermediate product, the reaction temperature is 30°C, the stirring speed is 350r / min, until the pH of the solution=9, stop Add alkali to obtain tall oil-based surfactant;

[0027] (2) Preparation of modified cardanol surfactant: cardanol and concentrated sulfuric acid are selected and weighed in a molar ratio of 1:0.2, cardanol is put into the reaction kettle, and concentrated sulfuric acid is added while stirring, the rea...

Embodiment 2

[0035] The present embodiment prepares a kind of dispersed asphalt regenerant, specifically comprises the following steps:

[0036] (1) Preparation of tall oil-based surfactant: select and weigh tall oil and concentrated sulfuric acid at a molar ratio of 1:0.25, put the tall oil in the reaction kettle, add concentrated sulfuric acid while stirring, and the reaction temperature is 40°C. The stirring speed is 450r / min, the reaction time is 50min, and the intermediate product is obtained; sodium hydroxide is added while stirring in the reactor containing the intermediate product, the reaction temperature is 30°C, the stirring speed is 350r / min, until the solution pH=9.5, stop Add alkali to obtain tall oil-based surfactant;

[0037] (2) Preparation of modified cardanol surfactant: cardanol and concentrated sulfuric acid are selected and weighed in a molar ratio of 1:0.25, cardanol is put into the reaction kettle, and concentrated sulfuric acid is added while stirring, the reaction...

Embodiment 3

[0054] In this example, the dispersed asphalt rejuvenator prepared in Example 1 was used as the regenerant for preparing the regenerated asphalt mixture. In addition, aged asphalt mixture and new asphalt mixture were also selected, and the gradation of the aged asphalt mixture was For AC-13C, the mixing ratio of aged asphalt mixture and new asphalt mixture is 3:7 and 4:6, and the dosage of dispersed asphalt rejuvenator is selected as 6%, 8%, and 10% of the mass of aged asphalt in the mixture. %, the properties of the prepared recycled asphalt mixture are shown in Table 5:

[0055]

[0056] table 5

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Abstract

The invention relates to a dispersed asphalt regenerant and a preparation method thereof. The regenerant is prepared by mixing a tall oil-based surfactant and a modified cardanol surfactant. The talloil-based surfactant accounts for 50 to 80 parts by weight, and the modified cardanol surfactant accounts for 20 to 50 parts by weight. The dispersed asphalt regenerant can promote effective fusion ofaged asphalt and new asphalt, and can optimize the performance of the prepared recycled asphalt mixture.

Description

technical field [0001] The invention relates to the technical field of road building materials, in particular to a dispersed asphalt regeneration agent and a preparation method thereof. Background technique [0002] Since the end of the 1990s, asphalt mixtures have been widely used as paving materials for high-grade highways and municipal roads in my country. Most of these asphalt pavements have entered the maintenance or reconstruction period, and a large number of digging and milling asphalt mixtures have been abandoned. On the one hand Cause environmental pollution, on the other hand caused a great waste of resources. [0003] At present, the recycled asphalt of waste asphalt mixture (RAP) has become an industry consensus, and it is generally believed that when producing recycled asphalt mixture, it is necessary to add light oil containing aromatic components to the aged asphalt to restore it. The main technical route of regenerant products. For example, patents such as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K5/09C08K5/13C08L95/00
CPCC08K5/09C08K5/13C08L95/00C08L2205/025C08L2555/62C08L2555/64
Inventor 彭馨彦洪晶许龙林勇文刘铁黄绍龙
Owner 广州市市维新材料科技有限公司
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