Additive for improving asphalt pavement performance and preparation method thereof

A technology for road performance and asphalt pavement, which is applied in the field of additives to improve the road performance of asphalt pavement, can solve the problems of unfavorable environment and human health, strong pungent smell, inhalation of staff, etc., to achieve environmental protection and personal health, Less volatile gas and improved low temperature cracking resistance

Active Publication Date: 2014-05-21
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

[0031] Weigh 90 kg of sulfur, 5 kg of EVA (the content of vinyl acetate is 43%, and the softening point is 83°C), and 5 kg of PSBR (the mass percentage of styrene is 34%), mix them evenly with mixing equipment, and then transport the mixture to Extrude and granulate on an extruder to form granules with a diameter of 3 mm and a length of 3 to 8 mm to obtain the additive 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 twin-screw extruder. The ratio of raw materials and the properties of additives are shown in Table 1.

[0032] Pre-heat the special asphalt mixing tank to a constant temperature of 160°C; pre-preparate Fushun basalt rock into a graded AC-13 stone with a total weight of 100kg, and heat it to 160°C for use; pre-weigh No. 70 bitumen (Donghai brand) 4.06kg, heated to 160°C for later use; accord...

Embodiment 2

[0034]Weigh 65 kg of sulfur, 10 kg of EVA (vinyl acetate content of 68%, softening point of 105°C), 10 kg of PSBR (22% by mass of styrene), and 15 kg of polyethylene wax, and mix them evenly with mixing equipment , and then convey the mixture to an extruder for extrusion and granulation to form granules with a diameter of 3 mm and a length of 3 to 8 mm to obtain the additive of the present invention. The temperature at the feed port of the extruder is 60°C, the temperature at the discharge port is 120°C, and the intermediate temperature control point is between 60°C and 120°C. The extruder is a single screw extruder. The ratio of raw materials and the properties of additives are shown in Table 1.

[0035] 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 later use; accordi...

Embodiment 3

[0037] Weigh 90 kg of sulfur, 4 kg of EVA (the content of vinyl acetate is 43%, and the softening point is 83°C), 4 kg of PSBR (the mass percentage of styrene is 34%), and 2 kg of polyethylene wax, and mix them evenly with mixing equipment , and then convey the mixture to an extruder for extrusion and granulation to form granules with a diameter of 3 mm and a length of 3 to 8 mm to obtain the additive of the present invention. The temperature at the feed port of the extruder is 80°C, the temperature at the discharge port is 105°C, and the intermediate temperature control point is between 80°C and 105°C. The extruder is a twin-screw extruder. The ratio of raw materials and the properties of additives are shown in Table 1.

[0038] 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) 4.06kg, heat...

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Abstract

The invention discloses an additive for improving asphalt pavement performance and a preparation method thereof. The additive comprises, by weight percentage, 65%-90% of sulfur, 4-15% of EVA (ethylene-vinyl acetate), and 4%-20% of PSBR (powdered styrene butadiene rubber). The preparation method includes: mixing sulfur, ethylene-vinyl acetate and powdered styrene butadiene rubber evenly, conveying the mixture into an extruder to conduct extrusion and granulation, thus obtaining the additive. The preparation process of the additive provided by the invention generates little irritating smell, and adding of the additive into the asphalt mixture can effectively improve the anti-rutting performance of the asphalt pavement and improve anti-water damage performance. Also, the low temperature performance is taken into account at the same time.

Description

technical field [0001] The invention relates to an additive for improving road performance of asphalt pavement, in particular to an additive for improving anti-rutting and water damage performance of asphalt pavement, its preparation method and application. 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. In addition, in areas with a lot of rain in the south of my country or along the coast, water damage to asphalt pavement caused by stone falling off due to rainwater penetrating into the asphalt mixture surface layer or even the base layer is also more prominent. These two phenomena have become 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/26C04B26/26
Inventor 陈保莲宁爱民程国香范思远张静陈闯李志军
Owner CHINA PETROLEUM & CHEM CORP
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