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Biological asphalt for road as well as preparation device and preparation method of biological asphalt

A bio-asphalt and road technology, applied in the direction of melting and processing tar asphalt/petroleum asphalt/natural asphalt, etc., can solve the problems of strong temperature sensitivity and poor high temperature performance of bio-asphalt, and achieve low temperature sensitivity, excellent performance and high temperature performance. Good results

Active Publication Date: 2015-11-11
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But nowadays, there are very few R&D and applications of domestic biomass heavy oil used in road materials, and the bio-asphalt obtained according to the known preparation methods has defects such as poor high-temperature performance and strong temperature sensitivity, such as combining biomass heavy oil with 90# matrix The softening point of bio-asphalt blended with asphalt is 45°C, while the softening point of 90# base asphalt is 47°C. The penetration index of this bio-asphalt is PI=1.0 and its unit is 0.1mm, which cannot fully meet the relevant national technical standards. requirements

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  • Biological asphalt for road as well as preparation device and preparation method of biological asphalt
  • Biological asphalt for road as well as preparation device and preparation method of biological asphalt
  • Biological asphalt for road as well as preparation device and preparation method of biological asphalt

Examples

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Effect test

Embodiment 1

[0041] In this example, the prepared bio-asphalt for roads is made of the following raw materials in weight percentage: 20% of biomass heavy oil, 74% of base asphalt, 5% of methanol, and 1% of low-density polyethylene.

[0042] When actually preparing bio-asphalt for roads, the mass percentages of the above raw materials can be adjusted accordingly according to specific needs.

[0043] In this embodiment, the base asphalt is No. 90 asphalt.

[0044] In this embodiment, the biomass heavy oil is the remaining heavy oil after the biomass oil is extracted from gasoline and diesel oil, and its specific gravity is 0.82-0.95; the biomass oil is a liquid oil obtained by pyrolysis of biomass .

[0045] Moreover, the biomass is wood chips, corn stalks, cotton stalks or wheat straws.

[0046] In this embodiment, the biomass is sawdust.

[0047] In the present embodiment, the density of low-density polyethylene is 0.915g / cm 3 ~0.940g / cm 3 .

[0048] Such as figure 1 , figure 2 Th...

Embodiment 2

[0070] In this example, the prepared bio-asphalt is made of the following raw materials in weight percentage: 20% of biomass heavy oil, 70% of base asphalt, 5% of methanol, and 5% of low-density polyethylene.

[0071] In this example, the preparation device used is the same as that in Example 1.

[0072] In the present embodiment, the preparation method adopted comprises the following steps:

[0073] Step 1. Base asphalt heating: heat base asphalt to temperature T1, where T1=140°C;

[0074] Step 2, adding low-density polyethylene: under the condition of temperature T1, add low-density polyethylene to the heated base asphalt in step 1, and stir for 0.5h at a stirring rate of 3000r / min to obtain the first mixture ;

[0075] Step 3, adding biomass heavy oil: under the condition of temperature T1, add the biomass heavy oil preheated to 60°C into the first mixture described in step 2, and stir for 0.5h at a stirring rate of 3000r / min, Obtain the second mixture;

[0076] Step 4,...

Embodiment 3

[0082] In this example, the prepared bio-asphalt is made of the following raw materials in weight percentage: 10% of biomass heavy oil, 80% of base asphalt, 5% of methanol, and 5% of low-density polyethylene.

[0083] In this example, the preparation device used is the same as that in Example 1.

[0084] In the present embodiment, the preparation method adopted comprises the following steps:

[0085]Step 1. Heating base asphalt: heating base asphalt to temperature T1, where T1=160°C;

[0086] Step 2, adding low-density polyethylene: under the condition of temperature T1, add low-density polyethylene to the heated base asphalt in step 1, and stir for 1.5h at a stirring rate of 500r / min to obtain the first mixture ;

[0087] Step 3, adding biomass heavy oil: under the condition of temperature T1, add the biomass heavy oil preheated to 60°C into the first mixture described in step 2, and stir for 1 hour at a stirring rate of 500r / min to obtain the second mixture;

[0088] Ste...

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Abstract

The invention discloses biological asphalt for road. The biological asphalt is prepared from the following raw materials in percentage by weight: 10-30% of biomass heavy oil, 60-84% of matrix asphalt, 5% of methanol and 1-5% of low density polyethylene. The biological asphalt provided by the invention is low in cost, convenient to prepare, good in performance and high-temperature property, and low in temperature sensitivity; in addition, the invention further discloses a preparation device of the biological asphalt for road; the device includes a horizontal base, a liftable support pillar, a heating cup, a stirring cup, a feeding device and a control box; the device is simple in structure, reasonable in design, convenient to operate and good in use effect, and can simply and quickly complete the preparation of the biological asphalt; meanwhile, the invention also discloses a preparation method of the biological asphalt for road; the method includes the following steps: I, heating the matrix asphalt; II, adding low-density polyethylene; III, adding biomass heavy oil; IV, adding methanol; the method is simple in steps, reasonable in design and simple to operate; the prepared biological asphalt is excellent in performance.

Description

technical field [0001] The invention belongs to the technical field of asphalt material preparation, and in particular relates to a bio-asphalt for roads, a preparation device and a preparation method thereof. Background technique [0002] At present, the demand for asphalt materials in large-scale high-grade highway asphalt pavement construction and maintenance projects continues to increase, and non-renewable petroleum asphalt resources are gradually depleted. Seeking sustainable alternative materials for petroleum asphalt has become an urgent need in the international road field. Substance heavy oil came into being. Biomass is rapidly heated under complete anoxic conditions to rapidly pyrolyze the biomass, and the pyrolysis gas is rapidly condensed to obtain the primary liquid fuel, that is, biomass oil. Biomass oil is a biomass liquid oil formed by using biomass pyrolysis technology to condense biomass before high-temperature heating, rapid cooling, and intermediate liq...

Claims

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Application Information

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IPC IPC(8): C10C3/12
Inventor 汪海年龚芳媛尤占平刘玉王清华高俊峰姚舜
Owner CHANGAN UNIV
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