Anti-rutting modifier and preparation method thereof

A modifier and anti-rutting technology, applied in the field of pavement anti-rutting modifier, can solve the problems of unfavorable environment and personal health, staff inhalation, strong pungent odor, etc. The effect of less sexual gas

Active Publication Date: 2016-01-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above two patents also need to heat and melt sulfur into a liquid state. The operating temperature is high, which will produce a strong pungent smell, which is not conducive to the environment and human health.
It can only improve the high-temperature performance of the asphalt mixture. The low-temperature cracking resistance and water damage resistance of the mixture still need to be improved, and the sulfur particles formed are also relatively brittle and easily broken during transportation and loading and unloading. Due to the friction between the particles, It will also produce more dust, which not only pollutes the environment, but also easily inhales the staff, endangering health.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Weigh 70 kg of sulfur, 10 kg of EVA (vinyl acetate content of 68%, softening point of 105°C), 10 kg of waste rubber powder, and 10 kg of hard asphalt (natural asphalt with a penetration of 61 / 10mm), and use a mixing device Mix evenly, then extrude and granulate with an extruder and cutter to form granules with a diameter of 3 mm and a length of 5 to 10 mm to obtain the anti-rutting modifier of the present invention. The temperature at the feed port of the extruder is 80°C, the temperature at the discharge port is 120°C, and the intermediate temperature control point is between 80°C and 120°C. The extruder is a single screw extruder. The ratio of raw materials and properties of modifiers are shown in Table 1.

[0031] Pre-heat the special asphalt mixing tank to a constant temperature of 125°C; pre-preparate Fushun basalt rock into AC-13 stone with a total weight of 100kg, and heat it to 125°C for use; pre-weigh No. 70 bitumen (Donghai brand) 5.22kg, heated to 125°C for...

Embodiment 2

[0033] Weigh 94 kg of sulfur, 2 kg of EVA (43% vinyl acetate, softening point of 83°C), 3 kg of waste rubber powder, and 1 kg of hard asphalt granules (penetration of 301 / 10mm petroleum asphalt), and mix them with The equipment is mixed evenly, and then extruded and granulated by an extruder and a cutting machine to form granules with a diameter of 3 mm and a length of 5 to 10 mm to obtain the anti-rutting modifier of the present invention. The temperature at the feed port of the extruder is 60°C, the temperature at the discharge port is 100°C, and the intermediate temperature control point is between 60°C and 100°C. The extruder is a twin-screw extruder. The ratio of raw materials and properties of modifiers are shown in Table 1.

[0034] Pre-heat the special asphalt mixing tank to a constant temperature of 150°C; pre-preparate Fushun basalt rock into a graded AC-13 stone with a total weight of 100kg, and heat it to 150°C for use; pre-weigh No. 70 bitumen (Donghai brand) 4....

Embodiment 3

[0036]Weigh 82 kg of sulfur, 6 kg of EVA (55% vinyl acetate, softening point of 96°C), 6 kg of waste rubber powder, and 6 kg of hard asphalt (with a penetration of 181 / 10mm coal tar pitch) and use a mixing device Mix evenly, and then transport the mixture to an extruder for extrusion and granulation to form granules with a diameter of 3mm and a length of 3-8mm to obtain the anti-rutting modifier of the present invention. The temperature at the feed port of the extruder is 90°C, the temperature at the discharge port is 110°C, and the intermediate temperature control point is between 90°C and 110°C. The extruder is a single screw extruder. The ratio of raw materials and properties of modifiers are shown in Table 1.

[0037] Preheat the special asphalt mixing tank to a constant temperature of 135°C; pre-preparate Fushun basalt rock into AC-13 stone with a total weight of 100kg, and heat it to 135°C for use; pre-weigh No. 70 asphalt (Donghai brand) 4.64kg, heated to 135°C for la...

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Abstract

The invention discloses an anti-rutting modifier and a preparation method thereof. The modifier comprises: 70% to 94% of sulfur, 2% to 10% of EVA, 3% to 10% of waste rubber powder and hard asphalt in terms of mass percentage 1% to 10%. The preparation method includes the following steps: uniformly mixing sulfur, ethylene-vinyl acetate copolymer, waste rubber powder and hard asphalt, conveying the mixture to an extruder for extrusion and granulation to obtain the modifier of the present invention. The modifying agent of the present invention has little pungent odor during the preparation process, and the modifying agent of the present invention is added into the asphalt mixture, which can effectively improve the anti-rutting performance of the asphalt pavement, and has good compatibility with asphalt.

Description

technical field [0001] The invention relates to a pavement anti-rutting modifier, in particular to an 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 has restricted the development of sulfur-to-asphalt technology. Until the early 1980s, the sulfur-ba...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/36C04B22/02C04B24/26
Inventor 陈保莲宁爱民范思远张静陈闯李志军程国香刘树华
Owner CHINA PETROLEUM & CHEM CORP
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