Anti-aging waste road asphalt regenerator

A kind of technology of asphalt rejuvenator and road asphalt, which is applied in the direction of building components, building insulation materials, buildings, etc., can solve the problems of insufficient anti-secondary aging performance, prolong the secondary oxidation time, improve impact resistance, and enhance flexibility Effect

Inactive Publication Date: 2019-03-08
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems existing in the above-mentioned prior art, an object of the present invention is to provide a kind of aging-resistant waste road asphalt regenerant, which adopts the nano-scale layered silicate anti-aging agent treated by

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0027] The raw material composition and mass percentage ratio of the regenerant are as follows: 80 parts of aromatic oil, 15 parts of ethyl phthalate, 5 parts of talcum powder, and 5 parts of sodium carbonate. The preparation method is as follows:

[0028] (1) Blend the ethyl phthalate and the aromatic oil components according to the ratio, and stir at room temperature for 90 seconds until they are evenly mixed;

[0029] (2) Add talcum powder and sodium carbonate to the premix described in (1) according to the proportion, and keep warm at 110°C for 30 minutes.

[0030] (3) The premixture in (2) was sheared for 30 minutes under the conditions of a stirring temperature of 110° C. and a rotation speed of 500 rpm to 1000 rpm until a uniform liquid was formed to obtain the regenerant.

Embodiment 2

[0032] The raw material composition and mass percentage ratio of the regenerant are as follows: 80 parts of intermediate-naphthenic oil, 10 parts of terephthalic acid esters, 3 parts of talcum powder, and 8 parts of sodium fluoride. The preparation method is as follows:

[0033] (1) Blend the ethyl phthalate and the aromatic oil components according to the ratio, and stir at room temperature for 90 seconds until they are evenly mixed;

[0034] (2) Add talcum powder and sodium fluoride to the premix described in (1) according to the proportion, and keep warm at 110°C for 30 minutes.

[0035] (3) The premixture in (2) was sheared for 30 minutes under the conditions of a stirring temperature of 110° C. and a rotation speed of 500 rpm to 1000 rpm until a uniform liquid was formed to obtain the regenerant.

Embodiment 3

[0036] Example 3------Influence of the anti-aging asphalt rejuvenator prepared in Example 1 on the performance of extracted asphalt

[0037] The asphalt solution was extracted by centrifugal extraction method, and the 20-1120 automatic asphalt extractor of German infratest company was used. After the waste asphalt mixture is added to the hopper, the mixture will remain in the screen through vibration and centrifugation, the mineral powder will be filtered into the mineral powder cylinder, and the centrifuged asphalt solvent mixture will be collected and stored in the right asphalt bucket middle. In order to improve the extraction efficiency, soak the RAP material in trichlorethylene for 12 hours before extraction.

[0038] Referring to the Ministry of Communications "Experimental Regulations for Asphalt and Asphalt Mixtures in Highway Engineering" (JTG E20-2011), add the aging-resistant asphalt rejuvenator of the present invention to the extracted asphalt in a mass ratio of 1...

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Abstract

The invention relates to the field of regeneration of waste road engineering materials and in particular relates to an anti-aging waste road asphalt regenerator taking aromatic-enriched components asmain raw materials. The anti-aging waste road asphalt regenerator comprises 80-95 parts of aromatic components, 4-18 parts of a plasticizer, 2-6% of an anti-aging agent and 5-10 parts of a modifier, wherein the anti-aging agent is one or a combination of several of talc, pyrophyllite, kaolin, black mica and white mica. The modifier is one or two of sodium carbonate and sodium fluoride. The aromatic-enriched component is one or a combination of several of furfural extract oil, aromatic oil, rubber oil, naphthene extract oil, intermediate base extract oil and intermediate base-naphthenic base extract oil. The plasticizer is one or a combination of several of phthalate, polyethylene terephthalate, benzene polycarboxylic acid esters and benzoate. Secondary aging of the reclaimed asphalt mixture can be effectively retarded, so that the problem that the conventional road asphalt regenerator is poor in secondary aging resistance is solved.

Description

technical field [0001] The invention relates to the field of regeneration of waste road engineering materials, in particular to an aging-resistant road asphalt regeneration agent with aromatic-rich components as the main raw material. Background technique [0002] Since the 1990s, my country's high-grade pavement construction has entered a period of rapid development, but with the large-scale promotion and use of high-grade asphalt pavement, various road diseases such as cracking, rutting, potholes, and looseness have gradually emerged and tended to become more serious. Therefore, the maintenance and repair of asphalt pavement is an urgent problem we are currently facing. According to the national highway development plan, there will be 6000-7000km of highways in my country that need to be overhauled every year. The scale of overhaul will exceed the scale of highways under construction at present. On average, nearly 4 million tons of waste asphalt mixture will be produced eve...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L91/00C08K5/12C08K3/34C08K3/26
Inventor 张吉哲姚占勇孙昌军梁明蒋红光
Owner SHANDONG UNIV
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