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Emulsified asphalt plant-mixed cold recycled asphalt mixture and preparation method thereof

A technology of asphalt mixture and emulsified asphalt, which is applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc., can solve resource waste, air, water and soil pollution, weaken the low temperature resistance of emulsified asphalt cold recycled mixture Cracking performance, anti-fatigue performance and other issues, to achieve the effect of reducing the amount of carbon dioxide and solving the problem of reuse

Active Publication Date: 2021-11-12
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, previous studies have shown that the addition of higher cement content will seriously weaken the low-temperature cracking resistance and high-strain fatigue resistance of emulsified asphalt cold recycled mixtures.
[0004] In recent years, with the rapid development of industry, there are more and more industrial waste residues such as fly ash, flue ash and rice husk ash in my country. If they are not disposed of properly, they will not only pollute the air, water and soil, but also cause waste of resources

Method used

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  • Emulsified asphalt plant-mixed cold recycled asphalt mixture and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Weigh 16 parts of new aggregate, 46 parts of the first old aggregate, 17.5 parts of the second old aggregate, 15 parts of the third old aggregate, 5.5 parts of mineral powder, 4.8 parts of emulsified asphalt, 4.8 parts of water, and 1.5 parts of fly ash Parts (fineness 35μm), flue ash 0.5 part (fineness 55μm), according to my country's industry standard "Technical Specifications for Highway Asphalt Pavement Recycling" (JTG / T 5521-2019) and "Test Regulations for Asphalt and Asphalt Mixtures in Highway Engineering" (JTG E20-2011) Formed Marshall specimens, the test mold was taken out after curing in a blast oven at 60°C for 42 hours, and then demoulded after cooling at room temperature for 12 hours; then put the specimen back into the blast oven at 60°C for 7 days Take it out, and measure the 15°C splitting strength and -10°C low temperature failure strain, as shown in Table 1.

[0027] It can be seen from Table 1 that, compared with cement-emulsified asphalt plant cold recy...

Embodiment 2

[0031] Weigh 18 parts of new aggregate, 43 parts of the first old aggregate, 17 parts of the second old aggregate, 18 parts of the third old aggregate, 4 parts of mineral powder, 4.6 parts of emulsified asphalt, 4.9 parts of water, and 0.75 parts of flue ash Parts (fineness: 45 μm), rice husk ash 0.75 parts (fineness: 55 μm), according to the national industry standard "Technical Specifications for Recycling of Highway Asphalt Pavement" (JTG / T 5521-2019) and "Test Regulations for Asphalt and Asphalt Mixtures in Highway Engineering" (JTG E20-2011) Formed Marshall specimens, the test mold was taken out after curing in a blast oven at 60°C for 42 hours, and then demoulded after cooling at room temperature for 12 hours; then put the specimen back into a blast oven at 60°C for 30 days Take it out, and measure the 15°C splitting strength and -10°C low temperature failure strain, as shown in Table 1.

[0032] It can be seen from Table 1 that compared with cement-emulsified asphalt pl...

Embodiment 3

[0036] Weigh 20 parts of new aggregate, 41 parts of the first old aggregate, 22 parts of the second old aggregate, 13 parts of the third old aggregate, 4 parts of mineral powder, 4.3 parts of emulsified asphalt, 4.5 parts of water, and 3 parts of fly ash Parts (fineness 32μm), flue ash 0.5 part (fineness 50μm), according to my country's industry standard "Technical Specifications for Highway Asphalt Pavement Recycling" (JTG / T 5521-2019) and "Test Regulations for Asphalt and Asphalt Mixtures in Highway Engineering" (JTG E20-2011) Formed Marshall specimens, the test mold was taken out after curing in a blast oven at 60°C for 42 hours, and then demoulded after cooling at room temperature for 12 hours; then put the specimen back into the blast oven at 60°C for 7 days Take it out, and measure the 15°C splitting strength and -10°C low temperature failure strain, as shown in Table 1.

[0037] It can be seen from Table 1 that compared with cement-emulsified asphalt plant cold recycled mi...

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Abstract

The invention belongs to the field of recycling of highway and urban road waste materials, and provides an emulsified asphalt plant-mixed cold-recycled asphalt mixture and a preparation method thereof. The emulsified asphalt plant-mixed cold-recycled asphalt mixture is prepared from, by mass, 10-25 parts of new aggregate, 70-85 parts of old aggregate and 3-6 parts of filler, wherein the total amount of the component A is 100 parts; the component B comprises, by weight, 3.5-5.5 parts of emulsified asphalt, 3.5-5.5 parts of water and 0.5-5 parts of industrial waste residues, and the industrial waste residues are a mixture of two or more of fly ash, flue ash and rice hull ash. Compared with a common cement-emulsified asphalt plant-mixed cold-recycled mixture, the product provided by the invention has the advantages that the final long-term strength and low-temperature damage strain of the emulsified asphalt plant-mixed cold-recycled mixture can be improved by 10-50% and 10-40% respectively by adding a certain proportion of industrial waste residues.

Description

technical field [0001] The invention relates to the field of recovery and regeneration of road and urban road waste materials, in particular to an emulsified asphalt plant-mixed cold recycled asphalt mixture and a preparation method thereof. Background technique [0002] The cold recycling technology of emulsified asphalt has become a research hotspot in the field of road materials at home and abroad because of its advantages of construction at room temperature and high utilization rate of recycled asphalt mixture (RAP material). [0003] However, there are some typical problems in the application process of emulsified asphalt cold recycled mixture, such as easy peeling and low strength. Generally, these problems are avoided by introducing additives or modifiers. Commonly used additives include ordinary Portland cement. However, existing studies have shown that the addition of high cement content will seriously weaken the low-temperature cracking resistance and high-strain ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/26C04B18/08C04B18/10
CPCC04B26/26C04B18/08C04B18/101C04B2201/50C04B14/28C04B18/16C04B18/12Y02W30/91
Inventor 张恒龙朱崇政李启石张帅
Owner HUNAN UNIV
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