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Grouting reinforcement material for humid or open water environment and preparation method for grouting reinforcement material

A technology of grouting reinforcement and clear water, applied in the field of grouting reinforcement materials and their preparation, can solve the problems of low viscosity, low strength, poor flame retardant effect, etc., and achieve high mechanical strength, low reaction temperature, and good permeability. Effect

Inactive Publication Date: 2016-01-13
BEIJING ORIENTAL YUHONG WATERPROOF TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, cement-based grouting reinforcement materials have a wide range of raw materials, low prices, and high strength. However, because they are suspensions, high-pressure grouting pumps are required for construction, and they cannot be poured into fine cracks, so their applications are limited.
The raw materials of sodium silicate grouting reinforcement materials also have wide sources, low price, low viscosity, and are true solutions, which can be poured into fine cracks, but their strength is low, and they become alkaline after curing, which has a certain impact on the environment. also restricted
Epoxy resin has high strength, low viscosity, and can penetrate into ultra-fine cracks. It is especially suitable for reinforcement of ultra-fine cracks. However, epoxy grouting reinforcement materials cure slowly, and it takes a week or even a few weeks to reach 100% strength. Does not meet the needs of special projects, and the price is expensive
Polyurethane grouting reinforcement material has high strength, low viscosity, fast reaction speed, and can penetrate into fine cracks. It is widely used, but its flame retardant effect is poor, the cost is high, and it will foam when it meets water, which affects the reinforcement effect.
[0003] At present, for the tiny cracks in wet or open water environment, the only reinforcement material used is epoxy resin, but for projects that require fast curing, epoxy resin reinforcement materials are difficult to meet the requirements

Method used

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  • Grouting reinforcement material for humid or open water environment and preparation method for grouting reinforcement material

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Experimental program
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Effect test

Embodiment 1

[0019] (1) Preparation of component A: in the reactor, first add 93 parts of sodium silicate, start stirring at room temperature, slowly add 6 parts of ethylene glycol dropwise, finish dropping in 1 hour, and then slowly add 1 part of tetramethyl benzene dropwise The urea catalyst was added dropwise for 1 hour, and the stirring was continued for half an hour, and then the material was discharged and packaged to obtain component A.

[0020] (2) Preparation of component B: in the jacketed reactor, firstly add 20 parts of low unsaturation and high molecular weight propylene glycol polyether with Mn=1000~2000, the temperature is 105~110℃, and the vacuum degree is -0.1MPa Dehydration for 2 to 3 hours under the same conditions, cooling to 60 ° C, adding 55 parts of polymethylene polyphenyl isocyanate, warming up to 70 to 80 ° C, keeping the temperature unchanged, reacting for 1 to 2 hours, cooling to below 50 ° C , add 20 parts of diethylene glycol butyl ether acetate and 3 parts of...

Embodiment 2

[0022] (1) Preparation of component A: in the reactor, first add 94 parts of potassium silicate, start stirring at room temperature, slowly add 5 parts of glycerol dropwise for 1 hour, and then slowly add 2 parts of 2-[ 2-(Dimethylamino)ethoxy]ethanol was added dropwise for 1 hour, continued to stir for half an hour, discharged and packaged to obtain component A.

[0023] (2) Preparation of component B: in the jacketed reactor, first add 25 parts of polyether polyol 5, dehydrate for 2 to 3 hours at a temperature of 105 to 110 ° C and a vacuum of -0.1 Mpa, and cool down. to 60°C, add 60 parts of polyol-modified diphenylmethane diisocyanate, heat up to 70-80°C, keep the temperature unchanged, react for 1-2 hours, cool down to below 50°C, add 15 parts of diisobutyl ketone , after stirring evenly, discharging, filtering, and packing with nitrogen to obtain B component.

Embodiment 3

[0025] (1) Preparation of component A: in the reaction kettle, first add 90 parts of sodium silicate, start stirring at room temperature, slowly add 4 parts of 1,4-butanediol dropwise, and then dropwise slowly after 1 hour Add 5 parts of tetramethylguanidine catalyst, add dropwise in 1 hour, continue stirring for half an hour, discharge and package to obtain component A.

[0026] (2) Preparation of component B: in the sandwich reactor, firstly add 15 parts of polyether polyol with Mn=400-2000 low unsaturation and high molecular weight polyether tetraol and 3 parts of hexanediol chain extender, Dehydrate for 2 to 3 hours at a temperature of 105 to 110°C and a vacuum of -0.1Mpa, cool down to 60°C, add 69 parts of polymethylene polyphenyl isocyanate, heat up to 70 to 80°C, and keep the temperature Keep the same, react for 1 to 2 hours, cool down to below 50°C, add 12 parts of ethylene glycol butyl ether acetate solvent, 0.5 part of UV absorber, 0.5 part of defoamer, stir evenly, ...

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Abstract

The invention relates to a grouting reinforcement material for a humid or open water environment and a preparation method for the grouting reinforcement material. The grouting reinforcement material is composed of double components A and B, wherein the component A is mainly composed of 90-95 parts of silicate and 3-7 parts of hydrophilic small molecular polyhydric alcohol; the component B is mainly composed of 10-30 parts of polyether polyol and 40-80 parts of polyisocyanate. The invention further comprises the preparation method for the grouting reinforcement material. The grouting reinforcement material provided by the invention has the advantages of being high in mechanical strength, low in viscosity, good in permeability, adjustable in reaction time, low in highest reaction temperature, free of any volatile solvents, good in flame retardancy, low in price, convenient to construct and the like. The grouting reinforcement material is specially used for grouting reinforcement of cracks in the humid or open water environment.

Description

technical field [0001] The invention relates to a grouting reinforcement material and a preparation method thereof, in particular to a grouting reinforcement material used in a humid or open water environment and a preparation method thereof. Background technique [0002] At present, the commonly used grouting reinforcement materials are cement, water glass, epoxy resin and polyurethane, etc., each with its own advantages and disadvantages. Among them, cement-based grouting reinforcement materials have a wide range of raw materials, low prices, and high strength, but because they are suspensions, they need to be constructed using high-pressure grouting pumps, and they cannot be poured into fine cracks, so their applications are limited. The raw materials of water glass grouting reinforcement materials are also widely sourced, low in price, low in viscosity, and are true solutions, which can be poured into fine cracks, but their strength is low, and they become alkaline after...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/08C08K3/34C08G18/66C08G18/48C08G18/32
Inventor 郑先军王新锋段文锋段存业
Owner BEIJING ORIENTAL YUHONG WATERPROOF TECH CO LTD