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Warm mix asphalt and preparation method thereof

A technology of warm mix asphalt and matrix asphalt, applied in building thermal insulation materials, building components, climate change adaptation and other directions, can solve problems such as poor low temperature performance and poor compatibility, achieve low cost, improve ductility, and improve resistance to low temperature cracking. performance effect

Active Publication Date: 2016-11-23
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 At the same time, there is also the problem of poor compatibility, and then a warm-mix asphalt 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

[0030] The warm-mix asphalt described in this embodiment, in terms of mass percentage, has the following formula:

[0031] Powdery solids: 2wt%; among them, the inorganic components in the powdery solids account for 80wt%, and the organic components account for 20wt%;

[0032] Branched polymer: 0.5 wt%;

[0033] Lipophilic surfactant: 0.5 wt%; wherein said lipophilic surfactant selects ethylene glycol fatty acid ester with an HLB value of 4.3;

[0034] Stearic acid: 0.8wt%;

[0035] Base asphalt: 96.2 wt%; wherein the base asphalt is a straight-run asphalt with a penetration of 100 1 / 10mm.

[0036] 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 flo...

Embodiment

[0038] The warm-mix asphalt described in this embodiment, in terms of mass percentage, has the following formula:

[0039] Powdery solids: 3.8 wt%; among them, the inorganic components in the powdery solids account for 75wt%, and the organic components account for 25wt%;

[0040] Branched polymer: 1.2 wt%;

[0041] Lipophilic surfactant: 1.7wt%; Wherein said lipophilic surfactant is propylene glycol fatty acid ester with an HLB value of 2.1;

[0042] Stearic acid: 1.4 wt%;

[0043] Base asphalt: 91.9 wt%; wherein the base asphalt is a straight-run asphalt with a penetration of 60 1 / 10mm.

[0044] 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% flo...

Embodiment

[0046] The warm-mix asphalt described in this embodiment, in terms of mass percentage, has the following formula:

[0047] Powdery solids: 4.7 wt%; among them, the inorganic components in the powdery solids account for 70wt%, and the organic components account for 30wt%;

[0048] Branched polymer: 4.3 wt%;

[0049] Lipophilic surfactant: 2.1wt%; wherein said lipophilic surfactant selects glycerol monostearate with an HLB value of 3.2;

[0050] Stearic acid: 2.7wt%;

[0051] Base asphalt: 86.2 wt%; wherein the base asphalt is oxidized asphalt with a penetration of 80 1 / 10mm.

[0052] The preparation method of powdery solid described in the present embodiment is as follows:

[0053] 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 po...

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Abstract

The invention discloses warm mix asphalt and a preparation method thereof. A formula of the warm mix asphalt comprises a powdered solid material, a branched high-molecular polymer, an oleophylic surfactant, stearic acid and matrix asphalt, wherein the powdered solid material is a separated solid product obtained by conducting oily sludge hot extraction and dewatering technology treatment on oily sludge. According to the warm mix asphalt, all components act synergistically, the effect of additive synergism can be achieved, mixing temperature and forming temperature of a warm mix asphalt mixture prepared form the warm mix asphalt are both lower than 135 DEG C, the warm mix asphalt mixture has the advantages of obviously decreasing the mixing temperature and forming temperature, and various properties of the warm mix asphalt mixture are equivalent to those of hot mix asphalt.

Description

technical field [0001] The invention relates to warm-mix asphalt 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 mixture, asphalt and s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L53/02C08K5/09C08K3/36C08K3/22C02F11/10
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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