Composite modified red mud-based asphalt anti-aging agent, and preparation method and application thereof

A compound modification and anti-aging agent technology, which is applied in the direction of climate sustainability, on-site coagulation pavement, roads, etc., can solve problems such as aging problems, reduce road maintenance costs, improve comprehensive performance, The effect of prolonging service time

Pending Publication Date: 2022-05-27
SHANDONG UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the single raw material of red mud cannot solve its aging problem, and there are few studies on the preparation of anti-aging agents with excellent anti-aging properties by using red mud combined with other raw materials.

Method used

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  • Composite modified red mud-based asphalt anti-aging agent, and preparation method and application thereof

Examples

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preparation example Construction

[0041] The second aspect of the present invention discloses the preparation method of the composite modified red mud-based asphalt anti-aging agent, comprising the following steps:

[0042] (1) Drying the red mud and the red mud modified material for subsequent use;

[0043] (2) pulverize the materials after drying in step (1), respectively, and then dry them again to obtain corresponding powders for use.

[0044] (3) After the nanomaterial is activated, it is co-dispersed in the solution with the coupling agent in proportion, and heated and refluxed after the dispersion.

[0045] (4) Mix the powders in steps (2) and (3) uniformly with the coupling agent and aromatic oil, and then obtain.

[0046] Further, in step (1), the red mud modified material is a mixture of red mud, slaked lime and montmorillonite.

[0047]Further, in step (1), the drying temperature is 100-150°C, and the time is 2-5h. The excess water in each material can be removed by drying, which is convenient fo...

no. 1 example

[0071] 1. A preparation method of a composite modified red mud-based asphalt anti-aging agent, comprising the following steps:

[0072] (1) The sintered red mud, slaked lime, montmorillonite, and cement were dried in a 100°C oven for 3 hours.

[0073] (2) The four kinds of dried raw materials in step (1) are respectively ball-milled in a ball mill for 20 minutes, and ground to the particle size required by the filler in "Technical Specification for Highway Asphalt Pavement Construction" (JTG F400-2004). The ball-milled powder was then placed in an oven at 100°C for 3 hours until dry.

[0074] (3) The nano-SiO 2 After activation at 400°C for 5h, disperse together with the silane coupling agent in a dewatered toluene solution (the silane coupling agent according to the mass percentage of each raw material: 5% of the silane coupling agent), ultrasonically disperse for 10min, and heat Reflux at 115°C until no droplets drip. After the reaction period, the reaction was stopped an...

no. 2 example

[0082] 1. A preparation method of a composite modified red mud-based asphalt anti-aging agent, comprising the following steps:

[0083] (1) The sintered red mud, slaked lime, montmorillonite and cement were dried in an oven at 150°C for 5 hours.

[0084] (2) The four kinds of dried raw materials in step (1) are respectively ball-milled in a ball mill for 50 minutes, and ground to the particle size required by the filler in "Technical Specification for Highway Asphalt Pavement Construction" (JTG F40-2004). Then, the ball-milled powder was placed in an oven at 150°C for 5 hours until dry.

[0085] (3) The nano-TiO 2 Activated at 400°C for 5 hours, and dispersed together with the titanate coupling agent in a dewatered toluene solution (the titanate coupling agent according to the mass percentage of each raw material: 5% of the titanate coupling agent) , ultrasonically dispersed for 10 min, heated at 110 °C and refluxed until no droplets were dropped. After the reaction period,...

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Abstract

The invention relates to a composite modified red mud-based asphalt anti-aging agent which comprises 40-70 parts of red mud, 1-3 parts of a nano material, 10-30 parts of a red mud modified material, 1-2 parts of a chemical solvent and 10-20 parts of aromatic oil, furthermore, the chemical solvent is a coupling agent, preferably, one or a mixture of several of a silane coupling agent, a titanate coupling agent and an aluminate coupling agent. Furthermore, the red mud modified material is a mixture of one or more of slaked lime, montmorillonite and cement. The coupling agent is used for carrying out composite modification on the red mud, the comprehensive performance of the modified red mud can be effectively improved, the modified red mud can play a role in blocking ultraviolet rays and oxygen, and the purpose of resisting aging of the asphalt mixture is achieved.

Description

Technical field: [0001] The invention belongs to the technical field of road engineering materials and preparation, and relates to a composite modified red mud-based asphalt anti-aging agent, a preparation method and an application. Background technique: [0002] The information disclosed in this Background section is only for enhancement of understanding of the general background of the invention and should not necessarily be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art. [0003] Due to the high energy of ultraviolet rays, the intermolecular fractures and recombination in the asphalt are caused, and the aromatic components are converted into colloids, and the colloids are converted into asphaltenes, which increases the specific gravity of asphaltenes in the asphalt and makes the asphalt change from sol to gel. Glue structure transformation; under the action of ultraviol...

Claims

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Application Information

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IPC IPC(8): C04B24/42C04B24/40C04B24/02C04B26/26E01C7/18C04B103/60C04B111/20
CPCC04B40/0039C04B26/26E01C7/182C04B2111/0075C04B2103/60C04B2103/605C04B2111/20C04B18/0409C04B22/064C04B14/104C04B7/00C04B14/062C04B24/42C04B24/00C04B14/28C04B14/14C04B14/048Y02W30/91
Inventor 张吉哲刚子璇娄术荣王飞姚占勇任宪富唐文涛
Owner SHANDONG UNIV
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