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Preparation method of modified biological asphalt, modified biological asphalt and use thereof

A bio-asphalt and modification technology, applied in building structures, building components, building insulation materials, etc., can solve the problems of non-homogeneous, complex composition of bio-asphalt, easy to hard and brittle, etc.

Active Publication Date: 2017-02-22
CHINA ACAD OF TRANSPORTATION SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with petroleum asphalt, bio-asphalt has great advantages in production cost, construction temperature and greenhouse gas emissions, but there are also some defects in technical performance: (1) Bio-asphalt is easy to be hard and brittle at low temperature, and the ductility value is small; (2) Bio-asphalt is easy to age at high temperature; (3) Bio-asphalt has complex components and poor stability. After a long period of storage, it shows heterogeneous characteristics
There are also polymer modifiers (such as waste plastics and waste rubber powder) added, but its essence is simple physical blending without chemical reaction

Method used

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  • Preparation method of modified biological asphalt, modified biological asphalt and use thereof
  • Preparation method of modified biological asphalt, modified biological asphalt and use thereof
  • Preparation method of modified biological asphalt, modified biological asphalt and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-R

[0035] Embodiment 1-RAFT homogeneous polymerization

Embodiment 1a

[0036] Example 1a - RAFT Homogeneous Polymerization of Monomer Styrene (St)

[0037] According to the ratio ([St]: [RAFT]: [initiator] = 450 ~ 5000: 3 ~ 5: 1), add styrene monomer into the single-branched round bottom reaction flask, as the 2-ethoxylate of RAFT reagent Carbonylpropane-2-dithiobenzoate (EPDTB), azo initiators (azobisisobutyrocyanide [AIBN] / azobisisoheptylcyanide [ABVN]), benzene solvents (benzene / toluene / xylene), magnetic stirring to dissolve. In the polymerization, the ratio of molar concentration of styrene monomer to RAFT reagent is (150-1000:3-5), and the ratio of molar concentration of RAFT reagent to initiator is (3-5:1). Place in frozen ice brine and bubble with argon for 10 minutes to remove oxygen in the system, seal, vacuumize, and replace with argon for 5 times. Under the condition of avoiding light, react at a constant temperature in an oil bath at 50-100°C. React until the molecular weight of polystyrene reaches 15,000-100,000, then add frozen ...

Embodiment 1

[0038] Example 1b - RAFT Homogeneous Polymerization of Monomer Chloroprene (CP)

[0039] Add chloroprene monomer according to the ratio ([CP]:[RAFT]:[initiator]=450~5000:3~5:1) in the single-branch round bottom reaction flask, as the 2- Ethoxycarbonylpropane-2-dithiobenzoate (EPDTB), azo initiators (azobisisobutyrocyanide [AIBN] / azobisisoheptylcyanide [ABVN]), benzene solvents (benzene / toluene / xylene), magnetic stirring to dissolve. In the polymerization, the ratio of molar concentration of chloroprene monomer to RAFT reagent is (150-1000:3-5), and the ratio of molar concentration of RAFT reagent to initiator is (3-5:1). Place in frozen ice brine and bubble with argon for 10 minutes to remove oxygen in the system, seal, vacuumize, and replace with argon for 5 times. Under the condition of avoiding light, react at a constant temperature in an oil bath at 50-100°C. React until the molecular weight of polychloroprene reaches 15,000-100,000, then add frozen petroleum ether to ...

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Abstract

The invention relates to a preparation method of modified biological asphalt, modified biological asphalt and use thereof. The modified biological asphalt provided by the invention has better stability, excellent three main indexes, and good high temperature and low temperature performance.

Description

technical field [0001] The invention relates to a preparation method of modified bio-asphalt, modified bio-asphalt and its application. Background technique [0002] In recent years, with the prosperity of our country's economy, the construction of highways, especially expressways, has developed rapidly. However, with the depletion of oil resources, the sustainable development of road construction is facing great challenges. In this case, the recycling of resources has become an important development trend in the transportation industry. Therefore, the research and development of new asphalt materials to replace petroleum asphalt has become a research hotspot in the field of pavement engineering at home and abroad, and bio-asphalt, as a new energy asphalt material with great potential, has been gradually valued by researchers. The production and performance of bio-asphalt Improvement and research on pavement use are imminent. [0003] Bio-asphalt is a new type of asphalt ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L53/02C08L25/06C08L47/00C08L33/12C08L33/08C08F293/00C08F112/08C08F136/18C08F120/14C08F120/18
CPCC08F112/08C08F120/14C08F120/18C08F136/18C08F293/005C08L95/00C08L2201/08C08L2205/025C08L2205/035C08L53/02C08L25/06C08L47/00C08L33/12C08L33/08
Inventor 惠嘉王曈朱宝林李霖柴智江睿南程寅雷谦荣
Owner CHINA ACAD OF TRANSPORTATION SCI
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