Nanomaterial modified rubber asphalt mixture and preparation method thereof

A technology of asphalt mixture and nano-materials, which is applied in the field of road engineering, can solve the problems of poor anti-rutting performance, increase the construction difficulty of rubber asphalt mixture, and high viscosity of rubber asphalt, and achieve good high-temperature anti-rutting performance.

CN107200511BActive Publication Date: 2019-12-27上海青谊路建新材料科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2019-12-27

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Abstract

The invention provides a nanometer material-modified rubber asphalt mixture and a preparation method thereof. The nanometer material-modified rubber asphalt mixture comprises the following components in parts by weight: road petroleum asphalt, tire rubber powder, mineral stones and nanometer materials. The preparation method of the nanometer material-modified rubber asphalt mixture comprises the following steps: (1) adding the tire rubber powder into the road petroleum asphalt and stirring at a first temperature to obtain rubber asphalt; (2) adding the nanometer materials into the rubber asphalt, stirring at a second temperature, shearing and re-stirring to obtain nanometer-modified rubber asphalt; (3) heating the mineral stones to a third temperature, successively adding the nanometer-modified rubber asphalt and stirring to obtain the asphalt mixture. The nanometer material-modified rubber asphalt mixture and the preparation method thereof provided by the invention have the benefit that the nanometer materials are adopted for modification in raw materials, so that the prepared nanometer material-modified rubber asphalt mixture has the characteristics of good high-temperature rutting resistance, adhesion property and aging resistance, and the like.
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Description

technical field

[0001] The invention belongs to the technical field of road engineering, and in particular relates to a nano-material modified rubber asphalt mixture and a preparation method thereof. Background technique

[0002] Rubber asphalt refers to the modified asphalt cementing material obtained by swelling and reacting with asphalt with a tire rubber powder content of more than 15% under high temperature and full mixing conditions. Due to the use of recycled tires as the main material for modification, it has a cost advantage compared to styrene-butadiene block copolymer (SBS) modified asphalt. , There are still deficiencies in the construction performance.

[0003] In order to improve the overall performance of rubber asphalt, other modifiers can be added to rubber asphalt for modification. The existing technology of applying rubber powder to asphalt pavement is mainly divided into two categories: wet method and dry method. The wet method refers to the use of a mo...

Examples

preparation example Construction

[0048]

[0049] A kind of preparation method of above-mentioned nano material modified rubber asphalt mixture, it comprises the steps:

[0050] (1) Add 0.42-1.21 parts of tire rubber powder to 5.34-10.23 parts of road petroleum asphalt, and stir at the first temperature to obtain rubber asphalt;

[0051] (2), adding 0.28-1.10 parts of nanomaterials to the above-mentioned rubber asphalt, stirring, shearing, and then stirring at a second temperature to obtain nano-modified rubber asphalt;

[0052] (3) Heat 100 parts of mineral stone to the third temperature, then add 7-11 parts of the above-mentioned nano-modified rubber asphalt, and stir to obtain a nano-material modified rubber asphalt mixture.

[0053] In fact, modified rubber asphalt is component A, and its total mass is 100 parts, wherein, the quality of tire rubber powder is 7-11 parts, and the quality of petroleum asphalt is 89-93 parts; mineral stone is component B, its The total mass is 100 parts, and component A acc...

Embodiment 1

[0062] The preparation method of the nano-calcium carbonate modified rubber asphalt mixture of the present embodiment comprises the steps:

[0063] (1), 0.56 parts of tire rubber powder are added to 7.44 parts of road petroleum asphalt, and at a first temperature of 180° C., stirred for 40 minutes to obtain rubber asphalt, wherein the tire rubber powder actually accounts for 7% by mass of the rubber asphalt, Road petroleum asphalt actually accounts for 93% of the mass percentage of rubber asphalt;

[0064] (2), add 0.32 parts of nano-calcium carbonate to the above-mentioned rubber asphalt (nano-calcium carbonate actually accounts for 4% by mass of the rubber asphalt), at the second temperature of 180°C, stir for 20min, then shear, shear The speed is 1500r / min, the shearing time is 40min, and the ordinary mixer is used to stir for 60min to obtain nano-modified rubber asphalt;

[0065] (3) Heat 100 parts of mineral stones to a third temperature of 200° C., then add 8 parts of t...

Embodiment 2

[0078] The preparation method of the nano zinc oxide modified rubber asphalt mixture of the present embodiment comprises the following steps:

[0079] (1), 0.80 parts of tire rubber powder are added to 9.00 parts of road petroleum asphalt, and at a first temperature of 180° C., stirred for 40 minutes to obtain rubber asphalt, wherein the tire rubber powder actually accounts for 8% by mass of the rubber asphalt, Road petroleum asphalt actually accounts for 90% of the mass percentage of rubber asphalt;

[0080] (2), add 0.80 parts of nano-zinc oxide to the above-mentioned rubber asphalt (nano-zinc oxide actually accounts for 8% by mass of rubber asphalt), at the second temperature of 180°C, stir for 20min, then shear, shear The speed is 2000r / min, the shearing time is 40min, and the ordinary mixer is used to stir for 60min to obtain nano-modified rubber asphalt;

[0081] (3) Heat 100 parts of mineral stones to a third temperature of 200° C., then add 10 parts of the above-menti...