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A kind of warm mix asphalt additive and preparation method thereof

A technology of warm mix asphalt and additives, which is used in building thermal insulation materials, pyrolysis sludge, building components, etc., can solve problems such as poor low temperature performance and poor compatibility, and achieve low cost, reduced shear viscosity, and improved extension. degree of effect

Active Publication Date: 2019-01-25
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention aims at the problem of poor low-temperature performance of warm asphalt mixture due to the use of polyethylene wax and chlorinated paraffin-70 as warm asphalt additives in the prior art, while inorganic additives and other organic additives are used as warm asphalt additives together However, there is also the problem of poor compatibility, and a warm-mix asphalt additive with good low-temperature performance, good compatibility, low cost, and environmental protection and its preparation method are provided.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The warm mix asphalt additive described in this embodiment, the following mass percentage, formula is as follows:

[0028] Powdery solids: 96wt%; among them, the inorganic components in the powdery solids account for 80wt%, and the organic components account for 20wt%;

[0029] Fischer-Tropsch wax: 3wt%;

[0030] Branched polymer (molecular weight 20000): 1wt%;

[0031] N,N'-ethylenebisstearamide: 1wt%;

[0032] In this example, the powdery solids are obtained from oily sludge (in which the oil content is 90wt%, and the solid content is 5wt%) through the thermal extraction and dehydration process of oily sludge. The process is as follows: send the oily sludge into the centrifuge, and simultaneously The flocculant, that is, polyacrylamide, is added to the centrifuge. The amount of the flocculant added is such that the final powdery solid contains 0.03wt% flocculant. After the oily sludge is centrifuged, it enters the extraction process; the centrifuged oily sludge is c...

Embodiment 2

[0034] The warm mix asphalt additive described in this embodiment, the following mass percentage, formula is as follows:

[0035] Powdery solids: 88wt%, of which, the inorganic components in the powdery solids account for 75wt%, and the organic components account for 25wt%;

[0036] Fischer-Tropsch wax: 5wt%;

[0037] Branched polymer (molecular weight 9000): 3wt%;

[0038] N,N'-ethylenebisstearamide: 4wt%;

[0039] The preparation method of the powdery solids described in this example is as follows: send the oily sludge (in which the oil content is 69wt%, and the solid content is 24wt%) into the centrifuge, and at the same time add flocculant, namely oleic acid, to the centrifuge The amount of polyoxyethylene ester and flocculant added is such that the final powdery solid contains 0.05wt% flocculant, and the oily sludge enters the extraction process after centrifugation; the centrifuged oily sludge and extraction agent are in a mass ratio of 1: Mix at 50°C, extract under t...

Embodiment 3

[0041] The warm mix asphalt additive described in this embodiment, the following mass percentage, formula is as follows:

[0042] Powdery solids: 74.2wt%: Among them, the inorganic components in the powdery solids account for 70wt%, and the organic components account for 30wt%;

[0043] Fischer-Tropsch wax: 9.2wt%;

[0044] Star branched polymer (molecular weight 6000): 5.8wt%;

[0045] N,N'-ethylenebisstearamide: 10.8wt%;

[0046] The preparation method of powdery solid described in the present embodiment is as follows:

[0047] The oily sludge (in which the oil content is 43wt%, and the solid content is 48wt%) is sent into the centrifuge, and at the same time, a flocculant, namely a mixture of cocamidopropyl betaine and lignosulfonate (both The mass ratio is 2:1), the amount of flocculant added is such that the final powdery solid contains 0.6wt% flocculant, and the oily sludge enters the extraction process after centrifugation; Mix at a ratio of 1:40, extract at normal ...

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Abstract

The invention discloses a warm-mix asphalt additive and a preparation method thereof. The warm-mix asphalt additive is prepared from powdery solid, Fischer-tropsch wax, a branched high-molecular polymer and N,N'-ethylenebisstearamide, wherein the powdery solid is a solid product separated after oily sludge is treated by adopting an oil sludge heat extraction and dehydration technology. The components in the warm-mix asphalt additive have a synergistic effect, an additive synergism effect can be played, the mixing and forming temperature of a warm-mix asphalt mixed material prepared by applying the warm-mix asphalt additive is lower than 135 DEG C, the warm-mix asphalt additive has the advantage of obviously reducing the mixing and forming temperature, and the properties of the mixed material are equivalent to the properties of warm-mix asphalt.

Description

technical field [0001] The invention relates to an asphalt mixture warm mixing additive and a preparation method thereof, belonging to the technical field of road asphalt. Background technique [0002] Asphalt mixtures currently used in road engineering are generally divided into two types according to the mixing construction temperature: cold mix asphalt mixture CMA (Cold Mix Asphalt) and hot mix asphalt mixture HMA (Hot Mix Asphalt). Cold-mix asphalt mixture is generally mixed and paved with emulsified asphalt or liquid asphalt and aggregate at room temperature, without heating the aggregate and binder, which can save a lot of energy. However, the initial road performance of cold-mix asphalt mixture is poor, and it is difficult to meet the requirements of important projects such as expressways and heavy-duty traffic roads. [0003] Hot mix asphalt mixture is the most widely used mixture with the best road performance. However, in the production process of hot mix asphalt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L53/02C08L91/06C08K5/20C08K3/36C08K3/22C02F11/10
CPCY02A30/30
Inventor 杨飞飞回军陈保莲宁爱民李宝忠
Owner CHINA PETROLEUM & CHEM CORP
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