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Modified emulsified asphalt as well as preparation method and application thereof

A technology of emulsified asphalt and modification, applied in building components, building insulation materials, buildings, etc., can solve the problems of poor water damage resistance, no performance, poor repair effect of disease cracks, etc., and achieve no pollution cost and simple process Effect

Active Publication Date: 2018-04-20
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the polymers in the polymer modified emulsified asphalt disclosed in the prior art only absorb the oil in the asphalt and then swell and distribute in the asphalt, and cannot form a high-strength grid-like skeleton structure with the colloids in the emulsified asphalt. It also does not have the ability to promote emulsified asphalt to form a high-viscosity material within one to two hours, so the repair effect on diseased cracks is poor; at the same time, its ability to resist water damage is poor

Method used

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Examples

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preparation example Construction

[0047] The present invention also provides a method for preparing the modified emulsified asphalt described in the above technical scheme, comprising the following steps:

[0048] a) Graphene and modifying agent are carried out modification reaction in solvent, obtain water-soluble graphene oxide after drying;

[0049] b) mixing the water-soluble graphene oxide obtained in step a) with a modified polyvinyl alcohol solution and an auxiliary agent to obtain a graphene / polyvinyl alcohol colloidal solution;

[0050] c) mixing the graphene / polyvinyl alcohol colloid solution obtained in step c), retarder and emulsified asphalt to obtain modified emulsified asphalt.

[0051] In the invention, firstly, the graphene and the modifying agent are subjected to a modification reaction in a solvent, and the water-soluble graphene oxide is obtained after drying. In the present invention, the graphene and the modifying agent are the same as those described in the above technical solution, and...

Embodiment 1

[0067] (1) 5g graphene and 10g sodium nitrate are joined in the concentrated nitric acid of 68% by 5g graphene and 10g sodium nitrate, then under the condition of stirring in an ice bath, slowly add 30g potassium permanganate, the adding process prevents that temperature exceeds 20 ℃, then Heat the water bath to 35°C, stir for 30min, then slowly add 230mL of distilled water to dilute, raise the temperature to 98°C and continue heating for 2h to obtain graphene to be oxidized; after the temperature stabilizes, add 50mL of 60% hydrogen peroxide and 700mL of distilled water to make The graphene becomes graphene oxide through oxidation reaction; the content is deposited on the bottom, filtered out and washed with distilled water until neutral, and the obtained product is freeze-dried to finally prepare water-soluble graphene oxide.

[0068] (2) Add 100g of sodium borohydride, 200g of high-efficiency silicone defoamer BYK-066N and the water-soluble graphene oxide prepared in step (1...

Embodiment 2

[0071] (1) Add 10g of graphene and 20g of sodium nitrate to 450mL of concentrated nitric acid with a mass concentration of 68%, and then slowly add 50g of silane coupling agent (KH550) under the condition of stirring in an ice bath, and slowly stir until the solution is stable Suspension, then heated to 50°C in a water bath, stirred for 30 minutes, then slowly added 450mL distilled water to dilute, heated to 98°C and continued heating for 2 hours to obtain graphene to be oxidized; after the temperature stabilized, add 100mL water-soluble silicone oil and 700mL distilled water to make the The graphene becomes graphene oxide through oxidation reaction; the content is deposited on the bottom, filtered out and washed with distilled water until neutral, and the obtained product is freeze-dried to finally prepare water-soluble graphene oxide.

[0072] (2) Add 150g of sodium borohydride, 300g of high-efficiency silicone defoamer BYK-066N and the water-soluble graphene oxide prepared i...

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Abstract

The invention provides modified emulsified asphalt as well as a preparation method and application thereof. The modified emulsified asphalt is prepared from the following component raw materials: 100parts by weight of emulsified asphalt, 0.05 to 0.1 part by weight of graphene, 2 to 6 parts by weight of modifier, 5 to 15 parts by weight of modified polyvinyl alcohol solution, 1 to 4 parts by weight of aid and 0.5 to 2 parts by weight of retarder, wherein the size dimension of the graphene is 0.5 to 3mu m and the thickness is 0.05 to 1.2nm. Compared with the prior art, the preparation method ofthe modified emulsified asphalt, disclosed by the invention, has the advantages that excellent properties of the graphene are utilized and are matched with certain use amounts of the components and colloid in the emulsified asphalt, and thus a high-strength grid skeleton structure is formed and further the modified emulsified asphalt with good layer sealing and crack repairing effects as well ashigh water damage resistance is obtained. An experimental result shows that the modified emulsified asphalt provided by the invention can be used for layer sealing and crack repairing of pavements, has better repair effects on disease cracks, and can be used for effectively solving the problems of pavement drainage difficulty and water damage.

Description

technical field [0001] The invention relates to the technical field of road engineering, in particular to a modified emulsified asphalt and its preparation method and application. Background technique [0002] With the rapid development of the national economy, the traffic volume of highways and urban roads is increasing and the overweight of vehicles is becoming more and more serious. The wear and damage to the road surface are greatly increased than before, which leads to the early occurrence of diseases within the service life of the road. As the road surface seal that is in direct contact with the vehicle, it is often the first to be damaged, causing cracks, longitudinal cracks, looseness, wave wrapping, rutting and other road surface damage problems. If maintenance and repairs are not carried out in time, the performance of the road surface will be affected. and service life. Nowadays, there are mainly two types of pavement seal repair materials: hot asphalt and emulsi...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L29/04C08K9/02C08K3/04C08K5/42
CPCC08K2201/003C08L95/00C08L29/04C08K9/02C08K3/04C08K5/42
Inventor 尹应梅黄太昌张荣辉
Owner GUANGDONG UNIV OF TECH
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