Oxidized graphene and waste vegetable oil composite modified warm mix asphalt and preparation method

A technology for waste edible oil and warm mix asphalt, which is applied in the fields of climate change adaptation, building insulation materials, building components, etc., can solve the failure to improve the low temperature performance of matrix asphalt, unfavorable energy saving, emission reduction and environmental protection, and mixing construction temperature requirements. High problems, to achieve the effect of good heat resistance, high flash point and low price

CN109266026AInactive Publication Date: 2019-01-25CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2019-01-25
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses oxidized graphene and waste vegetable oil composite modified warm mix asphalt. The oxidized graphene and waste vegetable oil composite modified warm mix asphalt is prepared from the following components in percentage by mass: 0.02%-1% of oxidized graphene, 3%-15% of dehydrated waste vegetable oil, and 84%-96.98% of matrix asphalt. The invention further discloses a preparation method for the composite modified warm mix asphalt based on the oxidized graphene and the dehydrated waste vegetable oil. The preparation method comprises the following steps: step 1, heating the matrix asphalt, adding the oxidized graphene into the heated matrix asphalt, shearing, stirring, to obtain oxidized graphene modified asphalt; and step 2, cooling the modified asphalt, adding the dehydrated waste vegetable oil into the cooled modified asphalt, stirring, to obtain the composite modified warm mix asphalt.
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Description

technical field

[0001] The invention belongs to the technical field of road engineering, and in particular relates to a modified warm-mix asphalt compounded with graphene oxide and waste cooking oil and a preparation method thereof. Background technique

[0002] In recent years, with the development of the economy, the rapid growth of traffic volume, the large-scale and overloading of transport vehicles have put forward higher requirements for the road performance of asphalt pavement. Therefore, improving the pavement performance of asphalt materials has become an important research topic for road workers, and modified asphalt, especially composite modified asphalt, is currently the most widely used method to improve pavement performance.

[0003] Graphene oxide (GO) is an emerging nanomaterial with a unique two-dimensional layered structure with a layer spacing of 0.7-1.2nm. The surface of GO has a large number of oxygen-rich functional groups, such as carboxyl, hydrocarbo...

Examples

Embodiment 1

[0047] A modified warm-mix asphalt compounded with graphene oxide and waste cooking oil, composed of the following components in terms of mass fraction:

[0048] 0.02% graphene oxide;

[0049] 3% dehydrated waste cooking oil;

[0050] 96.98% base bitumen.

[0051] The graphene oxide is prepared by the Hummers method, the layer spacing is 0.7-1.2nm, and the specific surface area is 2100-2600m 2 / g. The dehydrated waste cooking oil is derived from kitchen waste oil, its main component is triglyceride, and its oxygen content is about 40% to 50%. After the dehydration process, the water and volatile matter content is less than 0.2%. The base asphalt is selected from Esso 70# asphalt or Gaofu 70# asphalt.

[0052] The preparation method of the composite modified warm-mix asphalt based on graphene oxide and dehydrated waste cooking oil comprises the following preparation steps:

[0053] Step 1, heating the base asphalt, adding graphene oxide to the heated base asphalt, shearing ...

Embodiment 2

[0058] A modified warm-mix asphalt compounded with graphene oxide and waste cooking oil, composed of the following components in terms of mass fraction:

[0059] 1% graphene oxide;

[0060] 15% dehydrated waste cooking oil;

[0061] 84% base bitumen.

[0062] The preparation method of the composite modified warm-mix asphalt based on graphene oxide and dehydrated waste cooking oil comprises the following preparation steps:

[0063] Step 1, heating the base asphalt, adding graphene oxide to the heated base asphalt, shearing and stirring, to obtain graphene oxide modified asphalt;

[0064] Step 2, cooling the modified asphalt, adding dehydrated waste cooking oil to the cooled modified asphalt, and stirring to obtain composite modified warm mix asphalt.

[0065] The base pitch is heated to 160° C., the shear rate is 2000 r / min, the shear time is 25 min; the stirring time is 25 min.

[0066] In the step 2, the cooling temperature is 130° C., and the stirring time is 35 minutes....

Embodiment 3

[0068] A modified warm-mix asphalt compounded with graphene oxide and waste cooking oil, composed of the following components in terms of mass fraction:

[0069] 0.1% graphene oxide;

[0070] 5% dehydrated waste cooking oil;

[0071] 94.9% base bitumen.

[0072] The preparation method of the composite modified warm-mix asphalt based on graphene oxide and dehydrated waste cooking oil comprises the following preparation steps:

[0073] Step 1, heating the base asphalt, adding graphene oxide to the heated base asphalt, shearing and stirring, to obtain graphene oxide modified asphalt;

[0074] Step 2, cooling the modified asphalt, adding dehydrated waste cooking oil to the cooled modified asphalt, and stirring to obtain composite modified warm mix asphalt.

[0075] The base pitch is heated to 155° C., the shear rate is 2500 r / min, the shear time is 30 min; the stirring time is 30 min.

[0076] The cooling temperature is 128° C., and the stirring time is 43 minutes.