PG82-22 grade modified asphalt and production method thereof

A technology of modified asphalt and production method, which is applied in building components, building insulation materials, buildings, etc., which can solve the problems of high difficulty in production technology, poor storage stability of modified asphalt, and insufficient low-temperature crack resistance, so as to improve anti-fatigue Cracking and low-temperature cracking performance, excellent anti-rutting performance and anti-aging performance, effects of excellent anti-rutting and anti-aging performance

Pending Publication Date: 2022-08-02
江苏亿虎沥青材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the production technology of conventional polymer modified asphalt is relatively mature, but the production technology of PG88-22 grade SBS modified asphalt, which has special requirements for high temperature performance, is more difficult.
For example, the PG88-22 grade SBS modified asphalt disclosed in Chinese patent documents CN 103305014A and CN105176110A are all added with polyphosphate asphalt to improve the high temperature performance of the asphalt; in fact, this method will cause the viscosity of the modified asphalt to be high, exceeding the index requirements, And the construction workability is poor
A PG82-22 modified asphalt disclosed in Chinese patent document CN114350167A generates high-performance amide-based compounds through in-situ amidation reaction, improves the high-temperature PG performance of asphalt, and reduces the viscosity of modified asphalt; however, excessive use of additives leads to modification. The asphalt system is complex, the compatibility between materials is poor, it is easy to segregate and stratify, and the production operation is too cumbersome, which is not practical and economical
The PG82-22 modified asphalt disclosed in Chinese patent document CN105176110A selects 50# heavy traffic asphalt, and adopts low-grade base asphalt to improve the high temperature grade of modified asphalt; however, the lower the grade of the base asphalt is, the higher the ratio between the base asphalt and the modifier The worse the compatibility, the worse the storage stability of the prepared modified asphalt
Another Chinese patent document CN101270227A discloses a high-strength modified asphalt, which uses a relatively high content (6-7%) of rock asphalt and SBS modifier to modify the base asphalt. Although this modification method has Good high-temperature performance, but its low-temperature crack resistance is insufficient, and the anti-aging performance is poor, and with the increase of the content, the damage to the low-temperature ductility of the modified asphalt is also greater, and the high-temperature viscosity increases rapidly, which is not conducive to the field construction mixing

Method used

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  • PG82-22 grade modified asphalt and production method thereof
  • PG82-22 grade modified asphalt and production method thereof
  • PG82-22 grade modified asphalt and production method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] This example is to prepare a PG82-22 grade modified asphalt. The components of the modified asphalt in parts by weight include: 100 parts by weight of road petroleum asphalt, 4.0-6.0 parts by weight of SBS modifier, and 0-6.0 parts by weight of rubber oil. 3.0 parts by weight, 0-3.0 parts by weight of PG reinforcing agent, and 0.1-0.5 parts by weight of stabilizer; wherein, the road petroleum asphalt has a penetration of 60-800.1mm at 25°C and a straight line with a ductility of >100cm at 10°C. Distilled asphalt; specifically, at least one of imported South Korean Ssangyong 70# asphalt, South Korean SK70# asphalt, South Korean GS70# asphalt and domestic asphalt Dalian Xitai 70#, Zhenhai 70#, Shandong Runcheng 70#, Shandong Dongbo 70#, At least one of Shandong Haiyou 70# is mixed in proportion. Generally, the imported asphalt is 60-80%, and the domestic asphalt is 20-40%. The preferred combination and ratio is 70% Korea Ssangyong 70#+30% Dalian West Pacific 70#, 60% Kor...

Embodiment 2

[0040] 70,000kg of South Korea Ssangyong 70# asphalt and 30,000kg of Dalian West Pacific 70# asphalt were rapidly heated to 130°C from the raw material tank through the heat exchanger, pumped into a 100-ton high-temperature tank, stirred for 2 hours, and then rapidly heated to 180°C through the heat exchanger. ℃, pumped into the workshop reactor; at the same time, the SBS of 4800kg of Sinopec YH791H was lifted into the reactor through the frequency conversion transfer pipe for pre-mixing modification; , 0.25 unit) grinded once into the finished product tank, and pumped 1000kg of rubber oil, opened the finished product tank and stirred for 2h; then slowly and evenly added 160kg of stabilizer, and continued to stir for 2 hours; then 500kg of HW was slowly and evenly passed through the hopper elevator The PG82-22 modified asphalt was prepared by adding it into the finished product tank, keeping the temperature at 175°C, and controlling the feeding time to 1.5 hours.

Embodiment 3

[0042] 60,000kg of Ssangyong 70# asphalt and 40,000kg of Shandong Runcheng 70# asphalt were quickly heated to 130°C from the raw material tank through a heat exchanger, pumped into a 100-ton high-temperature tank, stirred for 1.5 hours, and then rapidly heated to 180°C through a heat exchanger. ℃, pumped into the workshop reactor; at the same time, 4800kg of SBS of PetroChina Dushanzi T6302H was lifted into the reactor for premixing modification through the frequency conversion transfer pipe; To 0.3, 0.25 units) grind once into the finished product tank, and pump 500kg of rubber oil, open the finished product tank and stir for 2h; then slowly and evenly add 150kg of stabilizer, continue to stir for 2.5 hours; then 500kg of HW is passed through the hopper elevator Slowly and evenly add it into the finished product tank, keep the temperature at 180°C, and control the feeding time to 1 hour. After the feeding is completed, continue stirring for 4 hours to obtain PG82-22 modified a...

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Abstract

The invention discloses PG82-22 grade modified asphalt and a production method thereof. The modified asphalt comprises the following components in parts by weight: 100 parts of road petroleum asphalt, 4.0-6.0 parts of an SBS modifier, 0-3.0 parts of rubber oil, 0-3.0 parts of a PG reinforcing agent and 0.1-0.5 part of a stabilizer, wherein the road petroleum asphalt is straight-run asphalt of which the needle penetration at 25 DEG C is 60-800.1 mm and the ductility at 10 DEG C is greater than 100cm; specifically, at least one of imported Korean double dragon 70 # asphalt, Korean SK70 # asphalt and Korean GS70 # asphalt is selected and mixed with at least one of domestic asphalt Dalian Xitai 70 #, Zhenhai 70 #, Shandong leap city 70 #, Shandong Jingbo 70 # and Shandong Hai right 70 # in proportion; the PG reinforcing agent is a new material HW type product of Wenchang in Jiangsu. By adding the PG reinforcing agent, the high-temperature PG performance of the asphalt is improved, the viscosity of the asphalt is improved, the compatibility among the components is good, separation and layering are avoided, and the asphalt has excellent rutting resistance and ageing resistance and has good practicability and economical efficiency.

Description

technical field [0001] The invention belongs to the technical field of modified asphalt preparation, in particular to a PG82-22 grade modified asphalt and a production method thereof. Background technique [0002] Due to the increasing climate temperature year by year and the effect of a large number of heavy-duty traffic on asphalt pavement, even if modified asphalt is used, there are still relatively serious early damage such as rutting, which seriously affects the normal and safe driving of vehicles. And with the development of economy and society, the requirements for the construction quality of road projects are increasing day by day, and asphalt as an important material for roads has also received more and more attention. The actual use conditions of the pavement, the asphalt index has not been able to establish the road performance relationship. Moreover, the existing penetration index system is more used to constrain the upstream asphalt quality of manufacturers, ra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L53/02C08L91/00C08K5/00
CPCC08L95/00C08L53/02C08L91/00C08K5/0008Y02A30/60
Inventor 王海荣陈加干吴亚俊
Owner 江苏亿虎沥青材料有限公司
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