A kind of warm mix asphalt and preparation method thereof

A warm-mix asphalt and warm-mix agent technology, applied in building insulation materials, building components, climate change adaptation, etc., can solve the problem of reducing the viscosity or elongation of asphalt at 60°C, reducing the mixing temperature of asphalt mixture, and not giving a matrix Asphalt 135°C viscosity Asphalt viscosity and other problems, to improve the elongation of asphalt, the preparation process is simple, and the effect of improving compatibility

Active Publication Date: 2018-06-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the 135°C viscosity of the asphalt composition is still very large, the 135°C viscosities in the examples are 675 cp and 690 cp, and the 135°C viscosity of the base asphalt and the comparison without adding MA-g-PE are not given. It is impossible to know how much the mixing temperature has been lowered. Only from the given viscosity value of 135°C, the effect of warm mixing has not been achieved.
[0013] In the existing warm mix asphalt preparation process, while reducing the mixing temperature of the asphalt mixture, the viscosity or elongation of the asphalt at 60°C is usually reduced, thus affecting the high temperature stability or low temperature cracking resistance of the asphalt mixture

Method used

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  • A kind of warm mix asphalt and preparation method thereof
  • A kind of warm mix asphalt and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Put the FT with carbon number of 40, molecular weight of 562 and weight of 1000g obtained after coal gasification into a synthesis reaction into a closed container, heat to 250°C, introduce 0.89 moles of chlorine at this temperature, and stir for 60 minutes to obtain intermediate body; Weigh 7000g of the four-line extracted oil with an aromatics content of 70%, put it in another airtight container and heat it to 70°C, add 44.1g of anhydrous AlCl 3 , stirred for 45 min. Then spray the above-mentioned intermediate into the oil extracted from the four-line extraction in a state of stirring. After all the spraying, keep the temperature at 70°C, stir and react for 90 minutes, and obtain the special warm mixing agent used in the present invention. The distribution ratio of each group is shown in Table 1.

[0040] Weigh 7000g of the above-mentioned special warm mix agent, add it to Shazhong Crude Oil No. 50 solvent deoiled asphalt with a weight of 100 kg and a temperature of ...

Embodiment 2

[0042] The FT obtained by gasifying coal with a carbon number of 90, a molecular weight of 1262, and a weight of 3500g is placed in a closed container, heated to 370°C, and 1.16 moles of chlorine are introduced at this temperature, and stirred for 100 minutes to obtain intermediate body; Weigh 1000g of catalytic cracking oil slurry with an aromatic content of 63%, put it in another airtight container and heat it to 90°C, add 4.7g of anhydrous TiCl 4 , stirred for 35 min. Then, the above-mentioned intermediate is sprayed into the catalytic cracking oil slurry in the form of mist under stirring. After all the spraying is completed, the temperature is kept at 90°C, and the reaction is stirred for 160 minutes to obtain the special warm mixing agent used in the present invention. The distribution ratio of each group is shown in Table 1.

[0043] Weigh 500g of the above-mentioned special warm mix agent, add it to Liaohe Crude Oil No. 90 oxidized asphalt with a weight of 100 kg and ...

Embodiment 3

[0045] Put the FT obtained by the synthetic reaction of natural gas with a carbon number of 100, a molecular weight of 1302 and a weight of 1000g in an airtight container, heat it to 325°C, introduce 0.31 moles of fluorine at this temperature, stir for 120min, and obtain intermediate body; Weigh 3500g of phenolic refined extract oil with aromatics content of 78%, put it in another airtight container and heat it to 110°C, add 12.3g of anhydrous SbCl to it 3 , stirred for 40 min. Then spray the above-mentioned intermediate into the refined phenol extraction oil in the state of stirring. After spraying all the mixture, keep the temperature at 110°C and stir for 135 minutes to obtain the special warm mixing agent used in the present invention. The distribution ratio of each group is shown in Table 1.

[0046] Weigh 4000g of the above-mentioned special warm mix agent, add it to Tahe crude oil No. 70 blended asphalt with a weight of 100 kg and a temperature of 150°C, and stir for 5...

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Abstract

The invention discloses warm mix asphalt and a preparation method thereof. The warm mix asphalt comprises asphalt and a specially-produced warm mix agent. The addition of the specially-produced warm mix agent in the warm mix asphalt is 0.5-7% of the weight of the asphalt, and 1.0-7.0% is optimized. Raw materials for preparation of the specially-produced warm mix agent comprise FT, halogen, aromatic hydrocarbon oil and a catalyst. The FT is high-molecular alkane, whose carbon number is 40-130; and molecular weight is 562-1822. The amount of halogen is 0.3-0.5 times the mole number of the FT. Halogen and the catalyst are added in the preparation process of the warm mix agent, so that a chemical reaction is carried out between aromatic hydrocarbon oil and the FT. The warm mix agent has a warm mixing effect for asphalt, and can improve compatibility between asphalt and the warm mix agent as well as adhesiveness between asphalt and stones. The warm mix agent can effectively reduce high-temperature viscosity of asphalt, reduce mixing and moulding temperatures of an asphalt mixture, enhance softening point and viscosity at 60 DEG C and extension of asphalt, and improve high and low temperature performances of asphalt.

Description

technical field [0001] The invention relates to a warm-mix asphalt and a preparation method thereof. Background technique [0002] The asphalt mixture used in road engineering in the past is 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 strength of cold-mix asphalt mixture is low, and it is difficult to meet the requirements of important projects such as expressways and heavy-duty traffic roads. Hot mix asphalt mixture is widely used and has good road performance. However, in the production process of hot mix asphalt mixture, asphalt and stone materials need to be mixed under high temperature conditions of 150~180°C. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L101/00C04B26/26
CPCY02A30/30
Inventor 陈保莲陈闯孙剑锋李志军范思远张静宁爱民程国香
Owner CHINA PETROLEUM & CHEM CORP
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