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Warm mix asphalt modifier and preparation method thereof, warm mixed asphalt and warm mix asphalt mixture

A technology of warm mix asphalt and modifier, which is applied in building thermal insulation materials, building components, climate change adaptation and other directions, can solve the problems of not being able to directly prepare warm mix asphalt, lowering the mixing temperature of the mixture, and high comprehensive use cost, and achieving The effect of reducing the risk of water damage, improving low temperature performance, saving energy and reducing costs

Inactive Publication Date: 2015-02-04
SHENZHEN OCEANPOWER NEW MATERIALS TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Surface active warm mixing technology is mainly based on Evotherm, which adopts water-based emulsification and dispersion technology. Its working principle is that water-based emulsifier forms a structural water film in asphalt, which increases the workability of the mixture to reduce the mixing temperature of the mixture. However, during the mixing process, a large amount of water in the warm mix agent volatilizes, which easily causes equipment corrosion and frequent replacement of filter bags. At the same time, due to the warm mixing mechanism of Evotherm warm mix agent, warm mix asphalt cannot be directly prepared, but is mixed with asphalt during the mixing process. At the same time, it is sprayed into the mixing pot, resulting in the increase of construction costs due to the addition of modified equipment, and the overall cost of use is relatively high.

Method used

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  • Warm mix asphalt modifier and preparation method thereof, warm mixed asphalt and warm mix asphalt mixture
  • Warm mix asphalt modifier and preparation method thereof, warm mixed asphalt and warm mix asphalt mixture
  • Warm mix asphalt modifier and preparation method thereof, warm mixed asphalt and warm mix asphalt mixture

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preparation example Construction

[0037] In addition, the present invention also provides a preparation method of the above-mentioned warm mix asphalt modifier, comprising the following steps:

[0038] (1) Weigh 75 to 95 parts of solvent oil in parts by weight and heat to 60 to 75°C;

[0039] (2) Add 3 to 25 parts of ionic surfactants into the above solvent oil, turn on the vacuum device and carry out mechanical stirring, and stir for 30 to 40 minutes; wherein, the vacuum degree of the vacuum device is controlled at 10 to 50 Pa;

[0040] (3) Control the temperature to drop to 30°C-45°C, turn off the vacuum device, continue stirring for 10-15min, and cool to room temperature to obtain the warm-mix asphalt modifier.

[0041] Further, the present invention also provides a kind of warm mix asphalt, which uses the above-mentioned warm mix asphalt modifier and base asphalt as raw materials, wherein the base asphalt is straight-run asphalt, oxidized asphalt, semi-air-blown asphalt, heavy traffic polymer modified One...

Embodiment 1

[0053] (1) Take 75 parts of lubricating oil base oil by weight and heat to 60°C;

[0054] (2) 20 parts of saturated C 12 ~C 18 Alkyl polypropylene polyamine and 5 parts of polyamine were added to the above-mentioned lubricating base oil respectively, the vacuum device was turned on and mechanically stirred, stirred for 30 minutes, and the vacuum degree was 50Pa;

[0055] (3) Control the temperature down to 45°C, turn off the vacuum device, continue to stir for 10 minutes, and cool to room temperature to obtain the warm mix asphalt modifier.

[0056] Preparation of warm-mix asphalt: Add warm-mix asphalt modifier with an asphalt weight of 1‰ to molten 70# petroleum asphalt, heat to 140°C and stir for 20 minutes to obtain warm-mix asphalt.

[0057] Preparation of warm mix asphalt mixture: heat warm mix asphalt and aggregate to a certain temperature; then add 4% warm mix asphalt and various graded aggregates into the mixing pot, and mix to prepare warm mix asphalt Mixture.

[...

Embodiment 2

[0060] (1) Take 95 parts of pyrolysis tar by weight and heat it to 75°C;

[0061] (2) Put 4 copies of C 12 ~C 18 Add fatty amidoamine and 1 part of polyamine to the cracked tar respectively, turn on the vacuum device and carry out mechanical stirring, stir for 40min, and the vacuum degree is 10Pa;

[0062](3) Control the temperature down to 30°C, turn off the vacuum device, continue stirring for 15 minutes, and cool to room temperature to obtain a warm-mix asphalt modifier.

[0063] Preparation of warm-mix asphalt: add 6‰ of asphalt weight of warm-mix asphalt modifier into molten 70# petroleum asphalt, heat to 150°C and stir for 20 minutes to obtain warm-mix asphalt.

[0064] Preparation of warm mix asphalt mixture: heat warm mix asphalt and aggregate to a certain temperature; then add 5% warm mix asphalt and various graded aggregates to the mixing pot, and mix to prepare warm mix asphalt Mixture.

[0065] The specific technical indicators of the obtained warm mix asphalt ...

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Abstract

The present invention discloses a warm mix asphalt modifier and a preparation method thereof, the warm mix asphalt modifier comprises the following components: 75-95 parts of solvent oil and 3-25 parts of a surface active agent. The warm mix asphalt modifier using oil base surface active technology effectively reduces the risk of water damage of a warm mix asphalt mixture, improves the low-temperature anti-craking performance of the warm mix asphalt mixture; at the same time, the warm mix asphalt modifier greatly reduces the mix temperature of the asphalt mixture, has the advantages of simple process, environmental protection, energy saving, low cost and the like. In addition, the invention also discloses warm mix asphalt and the warm mix asphalt mixture.

Description

technical field [0001] The invention relates to the technical field of road asphalt, in particular to a warm-mix asphalt modifier and a preparation method thereof, warm-mix asphalt and warm-mix asphalt mixture. Background technique [0002] The research on warm-mix asphalt mixture originated in Europe in the 1990s. It refers to a type of mixing temperature between hot-mix asphalt mixture (150°C-180°C) and cold-mix asphalt mixture (10°C-40°C). During the period, the performance of the new asphalt mixture reaches that of the hot mix asphalt mixture. Warm mix asphalt mixture can effectively reduce the mixing and construction temperature of asphalt mixture while maintaining the excellent road performance and construction quality of hot mix asphalt mixture by adding additives or using foamed asphalt. Decrease to 100°C ~ 130°C. [0003] In road engineering construction, the production and application of asphalt mixture is a major source of energy consumption and environmental po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C04B26/26
CPCY02A30/30
Inventor 赵欣平赵普何唯平
Owner SHENZHEN OCEANPOWER NEW MATERIALS TECH
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