Hard-asphalt extender and preparation method thereof

A technology of hard asphalt and extender, which is applied in the direction of construction, building components, building insulation materials, etc., and can solve the problem that the scope is not clearly defined, the low-temperature performance of bio-asphalt is poor, and the water-soluble components and content are not removed to a large extent. Oxygen compounds and other issues, to achieve low cost, reduce consumption, promote the change of energy consumption pattern and the strategic adjustment of energy structure

Active Publication Date: 2017-12-12
RES INST OF HIGHWAY MINIST OF TRANSPORT +1
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Problems solved by technology

[0004] However, the patents on the use of biomass to prepare road asphalt materials mainly include CN102660124 A "A Bio-asphalt Material for Roads and Its Preparation Method" and CN103396818 A "A Bio-asphalt and Its Preparation Method". The preparation of bio-asphalt in the above scheme The insoluble or high-boiling components in bio-oil are separated by conventional physical means. These separation methods do not remove the water-soluble components and oxygen-containing compounds that have a greater negative impact on the performance of asphalt to a large extent.
Therefore, the prepared bio-asphalt has the problem of poor low-temperature performance, and the above-mentioned patents do not clearly stipulate the scope of the pavement structure that bio-asphalt is suitable for

Method used

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  • Hard-asphalt extender and preparation method thereof
  • Hard-asphalt extender and preparation method thereof

Examples

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Embodiment 1

[0032] Embodiment 1 A kind of preparation method of hard asphalt extender

[0033] The present embodiment provides a kind of preparation method of hard asphalt extender, comprises the steps:

[0034] 1) Crush pine wood to 20 mesh to 60 mesh to obtain pine wood particles;

[0035] 2) In the fluidized bed pyrolysis reactor, feed nitrogen as the fluidizing gas, and at a reaction temperature of 500° C., 2 kg of pine wood particles enter the fluidized bed reactor from the feed bin at a feed rate of 500 g / h. Pyrolysis into bio-oil after 4s residence time in the chemical bed reactor;

[0036] 3) gained pine bio-oil and mass fraction are 3% CaCl 2 The solution was blended at a mass ratio of 1:8, stirred in a cold water bath at 10°C at 1000r / min for 1h, and vacuum filtered to obtain the water-insoluble component;

[0037] 4) The non-water-soluble component of the obtained pine pyrolysis oil is heat-treated at 120° C. for 45 minutes to 60 minutes in a nitrogen atmosphere to obtain a ...

Embodiment 2

[0038] Embodiment 2 A kind of preparation method of hard asphalt extender

[0039] This example provides a preparation method of a hard asphalt extender. The difference from Example 1 is that the biomass particles in Example 1 are replaced with willow wood chips, and the hard asphalt extender B is prepared in the same way.

Embodiment 3

[0040] Embodiment 3 A kind of preparation method of hard asphalt extender

[0041] This example provides a preparation method of a hard asphalt extender. The difference from Example 1 is that the biomass particles in Example 1 are replaced with rice husks, and the hard asphalt extender C is prepared in the same way.

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Abstract

The invention relates to a hard-asphalt extender and a preparation method thereof. the method comprises the following steps: 1, smashing biological substances; 2, performing pyrolysis on the obtained biological substances to obtain biological oil; 3, mixing the obtained biological oil and an inorganic-salt solution, performing stirring in cold water bath, and performing vacuum filtration to obtain a non-water-soluble component; and 4, performing heat treatment on the obtained non-water-soluble component in a nitrogen atmosphere to obtain the hard-asphalt extender. According to the invention, the ordinary biological substances such as waste wood residues and waste rice hulls are converted into the biological oil, a physical separation method used for asphalt material components in the biological oil is improved, and therefore usage performance of the biological asphalt extender is improved and an optimal usage range of biological asphalt which is used as the extender is decided.

Description

technical field [0001] The invention relates to a hard asphalt extender and a preparation method thereof, belonging to the technical field of green renewable asphalt materials. Background technique [0002] Asphalt is an indispensable and important material for high-grade pavement. The construction and maintenance of highway pipe networks in my country at the present stage maintain a high demand for asphalt materials. However, with the depletion of petroleum resources and the addition of coking units by many refineries in order to maximize fuel oil production, the supply of petroleum pitch has been affected to a certain extent. Therefore, finding alternative resources for the production of road asphalt materials has become one of the most important issues today. Hard asphalt has the characteristics of hard texture, high viscosity and high stiffness. In recent years, more and more hard asphalt is used in the pouring asphalt concrete pavement of long-span bridge decks and the...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L91/00C08H8/00
Inventor 曹东伟何敏涂成
Owner RES INST OF HIGHWAY MINIST OF TRANSPORT
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