KR100425076B1 - Hybrid admixture for the grouting - Google Patents

Abstract

The present invention relates to a method of manufacturing an injection chemical solution of a chemical injection method for the purpose of preventing the inflow or outflow of groundwater in repair or civil engineering and building construction for the cracks generated in the concrete structure. The injection chemical prepared by the present invention is a two-part low viscosity liquid, and is filled with cracks or pores by the reaction product in the form of an organic-inorganic complex formed by the complementary action of the reaction initiator and the silicon alkoxide. It is characterized by. This injection chemical has a low viscosity, so it is very applicable to the field, and the organic-inorganic composite produced has excellent affinity with concrete and in the long term continuously reacts with inorganic components such as calcium and potassium in concrete, It has the advantage of being integrated.

Description

Manufacturing method of organic-inorganic mixed composite {Hybrid admixture for the grouting}

Injectable chemical liquids conventionally used for the above-mentioned purposes include inorganic substances such as sodium silicate and organic substances typified by acrylamide. Sodium silicate has the advantages of low cost and good workability, but has the disadvantage of being lost by groundwater over time due to poor durability of the resulting gel. In addition, since the viscosity of the product itself is high, there is a limit in the injection property, thereby limiting the application range.

On the other hand, the acrylamide system achieves the above object by forming a polymer gel by mixing and dissolving acrylamide monomer together with a crosslinking agent and a catalyst to form an aqueous solution and injecting it with an appropriate reaction initiator. This chemical solution has low viscosity, so it is easy to inject and freely control the polymerization time, and also has excellent durability of the resulting gel, so that it does not dissolve by groundwater, and has excellent mechanical strength, such as gel strength and permeability coefficient, and no change in physical properties. It is evaluated as a very good injection medicine. However, the acrylamide-based polymerization reaction is greatly affected by the surrounding environment. That is, when the heat of polymerization generated by the polymerization reaction of acrylamide is not accumulated inside and easily diverges to the outside, the reaction temperature does not increase and the polymerization reaction hardly proceeds. For this reason, when the drug is injected into the micro crack, the heat of polymerization is easily escaped on both sides, and there is no opportunity to increase the internal temperature, so that the activation initiator cannot be activated, and thus the acrylamide monomer remains unreacted and thus its performance cannot be expressed. Of course, the remaining monomers are very likely to cause environmental problems such as groundwater contamination.

The present invention provides a method for producing an injection chemical solution of a chemical solution injection method for the purpose of preventing the inflow or outflow of groundwater in the repair or civil engineering and building construction for the cracks generated in the concrete structure For the purpose of the present invention, the present inventors added a component capable of inducing acrylamide polymerization reaction by water and reaction in forming an acrylamide-based injection chemical so that polymerization of the monomers occurs in any case to form a water-tight gel and the remaining monomers. The present invention has been completed by developing a method for preparing an infusion drug solution which can minimize the amount of.

Injectable pharmaceutical agent according to the present invention is composed of a two-part type of mother liquor mixed with an appropriate catalyst and a crosslinking agent in an acrylamide monomer aqueous solution, and an addition liquid containing a polymerization initiator and a silicon alkoxide. First, the preparation method of the mother liquor is prepared by preparing acrylamide as an aqueous solution, and then adding triethanolamine as a catalyst and NN`-methylenebisacrylamide as a crosslinking agent, followed by stirring at room temperature for about 2 hours. Completed. The addition liquid consists of a polymerization initiator, a silicon alkoxide, and anhydrous alcohol.

When mixing soy liquor, the polymerization reaction proceeds by the redox mechanism of the triethanolamine and the polymerization initiator in the portion where polymerization heat is easily accumulated, and the silicon alkoxide is shown in the micro crack portion where polymerization heat dissipation occurs easily and internal temperature cannot be expected. The polymerization proceeds with radicals generated by the hydrolysis reaction of. ·

Si + 4 (R-

polymer

In addition, some of the silicon radicals generate silicon oxide [(SiO2) n] by interaction with each other, which forms a complex with organic polyacrylamide to improve the mechanical strength of the polyacrylamide, and in the long term, the surrounding environment such as a concrete structure. Continuously reacts with inorganic components such as calcium, sodium, potassium, etc. from the (pozzolanic reaction, etc.) to integrate with the surrounding environment to make the pores more watertight and thus to maintain the function semi-permanently.

The alkyl group of the components of the silicon alkoxide [Si- (OR) 4], which is a major component of the injectable drug of the present invention, is composed of one of methyl, ethyl, propyl and butyl groups. Anhydrous alcohol is methyl alcohol, ethyl alcohol, n- propyl alcohol, isopropyl alcohol, butyl alcohol is used and may be applied alone or in combination of two or more.

The application method can be constructed by the general method such as spraying, dropper method, roller type, etc. for concrete structures, and can be used through two-component mixing injection method through appropriate injector when used for reinforcement and order of the ground. Do.

Hereinafter, the present invention will be described in more detail with reference to the following examples, and the present invention is not limited to these examples, which can be variously applied within the scope of the above description.

Example 1

500 gr of water was mixed with 500 gr of acrylamide monomer to prepare an aqueous solution, and 10 gr of triethanolamine and 20 gr of N-N`-methylenebisacrylamide were added thereto, followed by stirring at room temperature for 2 hours to prepare a mother liquid. Meanwhile, the additive solution was prepared by dissolving 1 gr of ammonium persulfate in 500 gr of anhydrous ethanol, followed by stirring and mixing tetraethoxysilicone [(Si- (OC2H5)], 500 gr. 100 gr each was taken, and the two liquids were mixed and stirred at a time.

Example 2

In Example 1, except for using anhydrous n-propanol instead of anhydrous ethanol in the components of the addition liquid was tested in the same manner and conditions as in Example 1.

Example 3

In Example 1, except for using tetramethoxysilicone [(Si- (OCH3)] instead of tetraethoxysilicone [(Si- (OC2H5)] in the components of the additive solution in the same manner and conditions as in Example 1 Experiment.

Example 4

In Example 1, except that tetrabutoxysilicone [(Si- (OC4H11)] was used instead of tetraethoxysilicone [(Si- (OC2H5)] in the components of the additive solution in the same manner and in the same manner as in Example 1 Experiment.

Example 5

An aqueous solution was prepared by mixing 400 gr of water with 600 gr of acrylamide monomer, and 5 gr of triethanolamine and 10 gr of N-N′-methylenebisacrylamide were added thereto, followed by stirring at room temperature for 2 hours to prepare a mother liquid. Meanwhile, the additive solution was prepared by dissolving 1 gr of ammonium persulfate in 500 gr of anhydrous ethanol, followed by stirring and mixing tetraethoxysilicone [(Si- (OC2H5)], 500 gr. 100 gr each was taken, and the two liquids were mixed and stirred at a time.

Example 6

In Example 5, the same procedures and conditions as in Example 5 were used except that anhydrous n-propanol was used instead of ethanol anhydride in the components of the additive solution.

Table 1 shows the values for polymerization time, compressive strength, and volume change of the organic-inorganic composites obtained through the above examples.

Comparison of Concrete Leakage by Chemical Treatment division Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Polymerization time (minutes) 3 7 9 4 6 11 Compressive strength (kg / cm2) 13.5 17.8 20.1 17.3 14.5 16.1 Volume change * (%) 5.7 4.3 7.1 4.5 3.7 7.8

*: Volume increased after 15 days flooding

In order to prepare the device as shown in Figure 1, each of the mother liquor and the additive solution prepared in Example was taken out and sprayed into the sand layer of Figure 1, and a polymer was formed between the pores of the sand to dehydrate the water. The effect was observed.

Figure 1

The leakage measured using Figure 1 is shown in Table 2 compared to that of the untreated sample.

Comparison of Concrete Leakage by Chemical Treatment division Leakage (g / hr) Untreated 2020.3 Example 1 10.5 Example 2 3.3 Example 3 4.2 Example 4 1.3 Example 5 2.5 Example 6 6.4

As a result of Table 2, it was proved that the ordering effect by the drug administration of the present invention is excellent, and the detection of the small amount of leak is considered to be a leak due to capillary phenomenon at the interface between the acrylic container and the sand layer rather than the leak through the sand layer. It is reasonable that this is irrelevant to the performance of the product itself.

Claims (4)

A method for producing an organic-inorganic composite, characterized in that it is prepared by mixing and stirring a two-component mixture of 100 g of a mother liquid containing acrylamide, triethanolamine, and a crosslinking agent, and 100 gr of a silicon alkoxide anhydrous alcohol and an additive containing an oxidizing agent. The silicon alkoxide [Si- (OR) 4] according to claim 1, wherein the alkyl alkoxide [Si- (OR) 4] is a single group selected from the group consisting of alkyl group (R) including one of methyl group, ethyl group, n-propyl group, isopropyl group and butyl group. Or a mixture of two or more kinds. The method of claim 1, wherein the anhydrous alcohol uses a single or a mixture of two or more selected from methanol, ethanol, n-propanol, isopropanol, and butanol. The method of claim 1, wherein the oxidizing agent comprises a single or a mixture of two or more selected from ammonium persulfate, sodium disulfate, and potassium persulfate.