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Method for preparing epoxy group pavement repairing material

A pavement repair and epoxy-based technology, which is applied in the field of preparation of epoxy-based pavement repair materials, can solve the problems of generating new cracks and fissures, easy to fall off, etc., and achieves the effects of not easy to crack, high strength, and simple preparation steps.

Inactive Publication Date: 2017-03-15
常州市鼎升环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention: for the current common epoxy resin-based repair materials, due to the different temperature and force states between the cement concrete and the epoxy resin, as the use time increases, it is easy to fall off or produce new The problem of cracks and fissures, the present invention uses stalactites as raw materials, freezes through liquid nitrogen, and after ice splitting and pulverization, mixes it with urea solution and calcium hydroxide, heats the urea in a pressurized environment to hydrolyze the release of carbon dioxide, and react with hydrogen Calcium oxide reacts to form calcium carbonate crystals, which are adsorbed on stalactites to prepare self-repairing fillers, and then the natural resin peach gum is used for surface modification under the action of microorganisms, and finally compounded with epoxy resin slurry to obtain epoxy-based pavement repair materials , the stalactite after adsorbing calcium carbonate is used as the crystal seed in the repairing material prepared by the present invention, and the seed crystal will continue to grow in the environment of water and carbon dioxide, and the cracks and cracks generated in the repairing are filled, and the mechanical strength is high. Will not produce shedding phenomenon, has broad application prospects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0019] First weigh 2kg of stalactites and soak them in a biogas digester for 12 hours. After soaking, spread them flat on the ground and spray them with liquid nitrogen to freeze for 5 minutes. After spraying, immediately put them into a jet mill for crushing for 2 hours and pass them through a 100-mesh standard sieve to obtain stalactite powder. Add 300g of stalactite powder into 4L of urea solution with a mass fraction of 30%, ultrasonically disperse for 30min to obtain a suspension, then add 0.6g of calcium hydroxide to the suspension, and continue ultrasonically to disperse for 15min to obtain a reaction solution; Move the reaction solution into a high-pressure reactor, heat up to 85°C and increase the pressure inside the reactor to 3.0 MPa, start the agitator to maintain pressure and stir the reaction for 4 hours, after the reaction is completed, release the pressure of the reactor to normal pressure, take out the reactants and use Centrifuge at 4000r / min to obtain the sed...

example 2

[0022] First weigh 1kg of stalactites and soak them in a biogas digester for 10 hours. After soaking, spread them flat on the ground and spray them with liquid nitrogen to freeze for 3 minutes. After spraying, immediately put them into a jet mill for crushing for 1 hour and pass them through a 100-mesh standard sieve to obtain stalactite powder. Add 200g of stalactite powder into 3L of urea solution with a mass fraction of 20%, ultrasonically disperse for 20min to obtain a suspension, then add 0.4g of calcium hydroxide to the suspension, and continue ultrasonically to disperse for 10min to obtain a reaction solution; Move the reaction liquid into a high-pressure reactor, heat up to 80°C and increase the pressure inside the reactor to 2.5 MPa, start the agitator to keep the pressure and stir for 2 hours, after the reaction is completed, release the pressure of the reactor to normal pressure, take out the reactants and Centrifuge at 3000r / min to obtain the sediment, and dry it to...

example 3

[0025]First weigh 1.5kg of stalactites and put them into a biogas digester to soak for 11 hours. After soaking, spread them flat on the ground and spray them with liquid nitrogen to freeze them for 4 minutes. powder; 250g of stalactite powder was added to 3L of urea solution with a mass fraction of 25%, ultrasonically dispersed for 25min to obtain a suspension, then 0.5g of calcium hydroxide was added to the suspension, and ultrasonic dispersion was continued for 12min to obtain a reaction solution; The above reaction solution was moved into a high-pressure reactor, heated to 82°C and the pressure inside the reactor was increased to 2.7MPa, and the stirrer was started to keep the pressure and stir for 3 hours. After the reaction was completed, the reactor was released to normal pressure, and the reactants were taken out and Centrifuge at a speed of 3500r / min to obtain the precipitate, and dry it to obtain the repair filler; peel the beet and cut it into pieces and press the jui...

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Abstract

The invention relates to a method for preparing an epoxy group pavement repairing material, and belongs to the technical field of repairing material preparation. The method comprises the following steps: by taking stalactite as a raw material, performing liquid nitrogen refrigeration and frost splitting powdering, mixing the stalactite with a urea solution and calcium hydroxide, heating in a pressurizing environment to hydrolyze urea to release carbon dioxide, enabling the carbon dioxide to react with calcium hydroxide to generate calcium carbonate crystal which can be adhered to the stalactite so as to prepare self-remedied packing, performing surface modification by using natural resin peach gum under the action of microorganisms, and finally compounding with the epoxy resin slurry, thereby obtaining the epoxy group pavement repairing material. The epoxy group pavement repairing material prepared by using the method is free of new crack or fissure caused by external environments within 8-10 years after application, is relatively high in strength and not liable to crack, the pressure resistance of the material can be greater than 52MPa, and the breaking strength of the material can be greater than 9.5MPa.

Description

technical field [0001] The invention relates to a preparation method of an epoxy-based pavement repair material, and belongs to the technical field of preparation of repair materials. Background technique [0002] In recent years, it has been found that concrete damage in civil engineering such as airports, roads, and bridges is increasing, resulting in huge direct and indirect economic losses. The reasons are not only the harsher environmental conditions and the poor durability of concrete during design, but also factors such as insufficient construction management, blind pursuit of progress, and even cutting corners. Therefore, in order to restore the function of these concrete structures and ensure the safety of use, they must be repaired in time. [0003] The existing more commonly used road repair materials include quick-setting cement, modified asphalt, epoxy resin mastic, etc. Among them, fast-setting cement materials are inconvenient or impossible to construct unde...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/20C04B20/02C04B14/28C04B20/10
CPCC04B26/20C04B20/1018C04B2111/343C04B2201/50
Inventor 许斌薛荣飞张晶
Owner 常州市鼎升环保科技有限公司
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