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Red mud-silicate composite anti-aging agent, asphalt mixture and its preparation method and application

A technology of asphalt mixture and anti-aging agent, which is applied in the field of asphalt anti-aging agent, can solve the problems of not reaching the design life of the road surface, the impact of traffic and transportation safety, and the unsatisfactory low-temperature performance of asphalt, so as to reduce road maintenance costs, Good high temperature rutting resistance and the effect of reducing construction costs

Active Publication Date: 2021-06-22
SHANDONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the aging phenomenon of asphalt will lead to more diseases (cracks, subsidence, potholes and pumping, etc.) A large area of ​​maintenance and repair is required, which is far short of the design life of the pavement, which will seriously affect the smooth flow of transportation and driving safety, and cause huge losses to the national economy
[0004] At present, many materials have been used as anti-aging agents for asphalt. For example, carbon black can prevent UV aging, but it will reduce the low-temperature crack resistance of asphalt and make it easier to break in low-temperature environments.
Due to its high specific surface area and high activity, nano-oxides can absorb ultraviolet light in asphalt, but it will make the low-temperature performance of asphalt unsatisfactory, and it is easy to agglomerate in asphalt

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0044] 1, a method for preparing a red mud-silicate composite anti-aging agent, including the following steps:

[0045] (1) Sintering method, silicate cement, chamber, and white mud were dried in a 105 ° C oven, respectively.

[0046] (2) Four drying materials in step (1) are respectively grinded in the ball mill, grinding the particle size required to the filler in the "Highway Asphalt Pavement Construction Technical Specification" (JTG F40-2004). Then, the ball after milling is then placed in a 105 ° C oven until dry.

[0047] (3) Four powder obtained after ball milling, 55 parts of sintering, 205 parts of sintering method, 20 parts of silicate cement, 5 parts of lime, 5 parts of white mud), mixed with 15 parts of aromatic oil, stir 30min, ie red mud-silicate composite anti-aging agent.

[0048] 2. A method for preparing an anti-aging asphalt mixture, including the following steps:

[0049] (1) Raw material weighing: According to the number of parts: 60 parts of limestone, 30 li...

no. 2 example

[0054] 1, a method for preparing a red mud-silicate composite anti-aging agent, including the following steps:

[0055] (1) The Bayer method is red mud, montmorillonite, and lime, and white mud are placed in a 100 ° C oven for 5 h.

[0056] (2) The four drying raw materials in step (1) are respectively grinded in the ball mill, grinding the particle size required to the filler in the "Highway Asphalt Pavement Construction Technical Specification" (JTG F40-2004). The ball milling powder was then placed in a 100 ° C oven until dry.

[0057] (3) Four powder obtained by step (3) after ball milling (40 parts of Bayer method, 30 parts of montmorillonite, 10 pieces of lime, 10 parts of white mud), mixed with 10 partial aromatic oils, stirred for 30 min , Ie red mud-silicate composite anti-aging agent.

[0058] 2. A method for preparing an anti-aging asphalt mixture, including the following steps:

[0059] (1) Raw material weighing: Take the following components according to the weight of...

no. 3 example

[0064] 1, a method for preparing a red mud-silicate composite anti-aging agent, including the following steps:

[0065] (1) Sintering method, silicate cement, chamber, and white mud, respectively, in an oven at 125 ° C.

[0066] (2) The four drying raw materials in step (1) are respectively grinded in the ball mill, grinding the particle size required to the filler in the "Highway Asphalt Pavement Construction Technical Specification" (JTG F40-2004). Then, the ball was then placed in an oven at 125 ° C for 2 h until dry.

[0067] (3) Four powder obtained by step (3) after milling, 60 parts of sintering method, 10 parts of silicate cement, 5 pieces of lime, 5 parts of white mud) and 20 parts of aromatic oil, stir 35min, ie red mud-silicate composite anti-aging agent.

[0068] 2. A method for preparing an anti-aging asphalt mixture, including the following steps:

[0069] (1) Raw material weigh: According to the weight of the number of components: 60 copies of rice, 30 copies of bas...

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Abstract

The present invention relates to the technical field of asphalt antiaging agents, in particular to red mud-silicate composite antiaging agents, asphalt mixtures and their preparation methods and applications. In parts by weight, the raw material composition of the antiaging agent includes: red mud 40 ‑70 parts, 10‑30 parts of silicate material, 1‑10 parts of slaked lime, 1‑10 parts of lime mud, 10‑20 parts of aromatic oil. The present invention combines the performance characteristics of red mud and silicate materials to prepare an anti-aging agent compounded with red mud and silicate materials. The anti-aging agent can effectively improve the temperature resistance to rutting and low temperature crack resistance of asphalt mixtures And water stability, and the dynamic modulus has been significantly improved, which can reduce the damage caused by aging of the asphalt pavement during service, prolong the service time of the road, and reduce the cost of road maintenance.

Description

Technical field [0001] The present invention relates to the technical field of asphalt antitosca. In particular, there is a genus-silicate composite anti-aging agent and a preparation method thereof to comprise a bitumen mixture comprising the anti-aging agent and a preparation method thereof. Background technique [0002] The information disclosed in the art of the present invention will only be intended to increase the understanding of the overall background of the present invention, and is not necessarily considered to admit or imply that the information has become a prior art known to those of ordinary skill in the art. [0003] With the continuous development of my country's economy, my country's road construction also entered a rapid development period. As of 2019, China Highway has reached 48.465 million kilometers, and the highway is 142,600 kilometers. In actual engineering construction, the road surface of the high-grade road is a semi-rigid base asphalt pavement, and t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/00C04B26/26E01D19/12E01C7/26E01D101/00C04B18/04C04B111/20
CPCC04B26/26C04B40/0039C04B2111/0075C04B2111/20E01C7/26E01D19/125E01D2101/00C04B18/0409C04B22/00C04B22/064C04B22/10C04B18/26C04B24/00C04B14/28C04B14/14Y02W30/91
Inventor 张吉哲姚占勇孙法合梁明蒋红光王凯
Owner SHANDONG UNIV
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