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Wet-mixing modified asphalt emulsion and preparation method

A technology of modified asphalt and emulsion, applied in building thermal insulation materials, on-site coagulating pavement, building components, etc., can solve the problems of difficult to increase the amount of SBS, difficult to obtain high asphalt content storage stability, etc., and achieve production costs. Low, excellent performance, high emulsion concentration effect

Active Publication Date: 2013-04-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This patent is difficult to obtain storage stability with high asphalt content to meet the requirements of warm-mixed emulsified asphalt emulsion, and the amount of SBS is difficult to increase.

Method used

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  • Wet-mixing modified asphalt emulsion and preparation method

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preparation example Construction

[0024]In the preparation method of the modified asphalt emulsion provided by the present invention, it is preferable to swell the elastomeric polymer before adding the modified asphalt stabilizer. Usually, the mixture of asphalt and elastomeric polymer is stirred at 100-200°C for more than 0.2 hours to swell the elastomeric polymer; it can be stirred before or after the colloid mill, or it can be stirred for a period of time After passing through the colloid mill and then stirring for a period of time, the total stirring time is preferably 0.2-1 hour.

[0025] One of the preparation methods of the modified asphalt emulsion for warm mixing provided by the present invention is to heat the asphalt raw material to 100-200°C, preferably 130-195°C, and then control the temperature, add elastomer polymer to it, and stir to make the elastomer The polymer is uniformly dispersed and fully swollen. The stirring time is usually not less than 0.2 hours, preferably 0.2-1 hour. Usually, the ...

Embodiment 1

[0041] Heat 680g of road asphalt A1 to a temperature of 170°C, then add 21g of elastomer polymer SBS-B1 (see Table 1) under stirring, stir for 20 minutes, pass through a colloid mill for high-speed shear dispersion, and then add 2.3g of sulfur under stirring , reacted for 4 hours to obtain modified asphalt, then added 8g lignite resin copolymer under stirring, stirred for 15 minutes, then kept warm (the temperature was 150-170°C) for subsequent use, and was recorded as CW1; 6.5g lignin polyamine, 2.5g Lauryl polyoxyethylene tetradecyl ammonium chloride, 2g octylphenol polyoxyethylene (12) ether, 1.5g sodium benzoate mixture are mixed with 276.2g water, stirring makes each component dissolve, obtains emulsifier aqueous solution , and then heated to 65°C; the prepared CW1 was mixed with an emulsifier aqueous solution and fully sheared and dispersed with a colloid mill, and condensed by a condenser to obtain a modified asphalt emulsion. The properties are shown in Table 3. It can...

Embodiment 2

[0051] Heat 700g of road asphalt A1 to a temperature of 180°C, add 16g of elastomer polymer SBS-B1 under stirring, stir for 30 minutes, pass through a colloid mill to shear and disperse, then add 8g of zinc oxide under stirring at 180°C, and stir for 5 hours. Add 7g lignite resin, and then keep the temperature at 180°C to obtain the product CW2; 10g nonylphenol polyoxyethylene ether ethyl dimethyl tetradecyl ammonium chloride, 2.5g lignin polyamine, 2g octylphenol polyoxyethylene (10) The mixture of ether and 3.5g polyethylene glycol (6000) and distearic acid ester (the weight ratio of polyethylene glycol and distearic acid ester is 1: 1) is mixed with 251g water, stirs to make each group Partially dissolved to obtain an aqueous emulsifier solution, which was then heated to 50°C. The prepared product CW2 was mixed with an emulsifier aqueous solution and sheared and dispersed with a shearing machine. After condensation, a modified asphalt emulsion was obtained. The properties a...

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Abstract

The invention relates to a wet-mixing modified asphalt emulsion and a preparation method, the modified asphalt emulsion comprises 60-75wt% of modified asphalt, 0.01-2wt% of brown coal resin copolymer, 0.05-5wt% of emulsifier compound, 0.02-2wt% of emulsification auxiliary agent and 23-35wt% of water; the emulsifier compound is composed of a lignin emulsifier, an amphiphilic surfactant and a nonionic surface activity, wherein the weight ratio of lignin emulsifier to amphiphilic surfactant to nonionic surface activity is 0.5-4:0.1-2:0.5-2. The emulsion preparation method is characterized in that the brown coal resin copolymer is mixed with modified asphalt, and then emulsified, or the brown coal resin copolymer is mixed with the emulsifier solution and then mixed with the modified asphalt for emulsification. The wet-mixing modified asphalt emulsion has the advantages of high concentration, good storage stability, good adhesiveness with a mineral aggregate, simple production technology and low production cost.

Description

technical field [0001] The invention relates to a modified asphalt emulsion and a preparation method thereof, in particular to a modified asphalt emulsion used for warm asphalt mixture and a preparation method thereof. Background technique [0002] Asphalt mixing technology is divided into hot mix and cold mix. For a long time, hot mix asphalt has been the mainstream, accounting for about 90% of the total. Hot-mix asphalt usually heats the asphalt from room temperature to about 140°C, heats the mineral material from room temperature to 160-180°C, and then mixes the asphalt and mineral material at a high temperature of 160°C. The temperature of the mixture after mixing is not low. At 150°C, hot mix materials require a higher temperature during mixing, paving and rolling, so not only consume a lot of energy in the process of production and construction, but also emit a lot of waste gas and dust, which affects the surrounding environment and has a negative impact on the constru...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08J3/03C04B26/26E01C7/24E01C7/22
CPCY02A30/30
Inventor 王红王子军王翠红佘玉成
Owner CHINA PETROLEUM & CHEM CORP
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