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Warm-mix asphalt mixture anti-rutting modifier and preparation method thereof

An asphalt mixture and anti-rutting technology, applied in the field of anti-rutting modifier for warm mix asphalt mixture, can solve problems such as restricting the development of sulfur-modified asphalt technology, incapable of collecting and processing harmful gases, affecting the health of operators, etc. , to reduce the amount of harmful gases, improve the anti-rutting performance, reduce the mixing and molding temperature of the mixture

Active Publication Date: 2017-07-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] As early as 1900, people began to use sulfur to modify asphalt to improve the anti-rutting performance of asphalt mixture pavement, but due to the high price of sulfur and the release of H 2 The problem of sulfur-containing gases such as S restricts the development of sulfur-modified asphalt technology
In the early 1980s, Rockbond Corporation of the United States researched and produced the sulfur-based modifier SEAM (sulphur extended asphalt modifier), which was cheap and easy to use, although it reduced H 2 The generation of sulfur-containing gases such as S, but the problem of harmful gas emissions has not been completely solved, which restricts the application of this technology product
However, no warm mixing agent is added to the formula, and the mixing temperature is high during product application, which will generate more harmful gases, which limits the application; in addition, no kneader is used in the preparation process, but single-screw or twin-screw The harmful gas produced by the extruder cannot be collected and processed, which will affect the health of the operator

Method used

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  • Warm-mix asphalt mixture anti-rutting modifier and preparation method thereof
  • Warm-mix asphalt mixture anti-rutting modifier and preparation method thereof
  • Warm-mix asphalt mixture anti-rutting modifier and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] 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.

[0047] Weigh 7kg of the above-mentioned special warm mixing agent, 43kg of natural asphalt with a penetration of 3dmm and a softening point of 110°C, and 50kg of industria...

Embodiment 2

[0050] 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.

[0051] Weigh 2kg of the above-mentioned special warm mixing agent, 8kg of petroleum asphalt with a penetration of 30 dmm and a softening point o...

Embodiment 3

[0054] Heat and melt FT obtained by synthesis reaction with natural gas as raw material with carbon number of 130, molecular weight of 1822 and weight of 7000g, put it in an airtight container, heat to 400°C, introduce 1.15 moles of bromine at this temperature, and stir for 180min , to obtain the intermediate; weigh 1000g of furfural refined extract oil with an aromatic content of 57%, put it in another airtight container and heat it to 150°C, add 1.7g of anhydrous FeCl to it 3 , stirred for 30min. Then spray the above-mentioned intermediate into the refined furfural extracted oil in a mist state under stirring. After spraying all the mixture, keep the temperature at 150°C and stir for 180 minutes to obtain the special warm mixing agent used in the present invention. The distribution ratio of each group is shown in Table 1.

[0055] Weigh 4kg of the above-mentioned special warm mixing agent, 26kg of coal tar pitch with a penetration of 16 dmm and a softening point of 90°C, an...

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Abstract

The invention discloses a preparation method of a warm-mixing asphalt mixture anti-rutting modifier which includes, by mass, 50-90% of sulfur, 8-43% of hard asphalt, and 2-7% of a specially-made warm-mixing agent. The preparation method includes the steps of: a) preparing the specially-made warm-mixing agent with FT, halogen and aromatic hydrocarbon oil as raw materials with addition of a catalyst; b) feeding the specially-made warm-mixing agent, the hard asphalt and the sulfur into a kneading machine, uniformly mixing the components at 70-110 DEG C and kneading the mixture into a dough-like shape, and meanwhile starting a vacuumizing system to collect generated gas and perform environmental protective treatment to the gas; and c) starting a bottom-discharge screw extruder and a cutting and granulating system to perform extrusion and granulation to prepare the warm-mixing asphalt mixture anti-rutting modifier. When being added to an asphalt mixture, the modifier can effectively reduce mixing temperature of the asphalt mixture and improve the anti-rutting property of the asphalt mixture, and also improves the low-temperature ductility of the asphalt mixture. The modifier has excellent compatibility with asphalt.

Description

technical field [0001] The invention relates to a warm-mix asphalt mixture anti-rutting modifier and a preparation method and application thereof. Background technique [0002] Due to the increasing number of vehicles in our country and the heavy load of transportation, the phenomenon of rutting and wrapping on asphalt pavement is becoming more and more serious, especially in the hot areas in southern my country. This phenomenon has become one of the main damage forms of asphalt roads in our country, seriously affecting the driving safety, service level and service life of asphalt roads. [0003] As early as 1900, people began to use sulfur to modify asphalt to improve the anti-rutting performance of asphalt mixture pavement, but due to the high price of sulfur and the release of H 2 The problem of sulfur-containing gases such as S restricts the development of sulfur-modified asphalt technology. In the early 1980s, Rockbond Corporation of the United States researched and p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/36C04B22/02
CPCY02A30/30
Inventor 陈保莲范思远陈闯张静宁爱民李志军程国香
Owner CHINA PETROLEUM & CHEM CORP