KR101861326B1 - Lightweight grouting composition with durability and self-healing property and grouting method therewith - Google Patents

Abstract

The present invention relates to a lightweight grout material composition having durability and a self-healing property, and a grouting constructing method using the same. According to an embodiment of the present invention, the lightweight grout material composition having durability and a self-healing property comprises 10-80 wt% of a lightweight inorganic binder, 10-80 wt% of a fine aggregate, 0.01-20 wt% of a performance improving agent, and 1-50 wt% of water.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lightweight grout material composition and a grouting method using the same,

The present invention relates to a durable and self-healing lightweight grout material composition and a grouting construction method using the same. More particularly, the present invention relates to a grout material composition for a tunnel, a cavity, a digging excavation surface, a slope (or slope, slope) And to a grouting construction method using the same. BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a lightweight grout material composition,

Generally, grouting is also called grouting. The grouting is filled with self-weight or pump, and cracks generated in the structure of the civil engineering construction field and the gap between the bottom plate of the mechanical equipment and the foundation concrete of the structure are filled, It supports the mechanical equipment stably and absorbs various vibrations and stress uniformly by filling the gaps generated in the mechanical equipment or structures, so that the life of the structure is maintained for a long time.

Recently, in civil engineering and construction work, grouting is performed to fill cement paste with filling of fine gaps in concrete structures, repair / reinforcement of structures, and reinforcement of soft ground, and various grout materials as such are being developed.

On the other hand, the tunnel structure (especially the lining concrete) is practically impossible to apply the earth pressure equally to the tunnel even if the construction is good at the actual site. In other words, the lining concrete can not be left at the ceiling of the tunnel by any means, and the fact that there is a cavity means that if uneven earth pressure acts on the backside of the lining concrete locally, the lining concrete peeling, And even severe collapse of the tunnel can occur. Therefore, filling the back surface of the tunnel lining completely is an absolute factor in maintaining the safety of the tunnel. The conventional grouting material for filling the cavity of the back of the tunnel lining uses a method of injecting cement paste or cement mortar, but it is required to be repaired in a considerable number of tunnels due to not being fully charged. In the old tunnel There are many cases where the leakage phenomenon becomes severe and the risk of collapse is present. Therefore, in order to protect the safety of the tunnel and the lining, the cavity of the back of the tunnel lining must be fully filled using suitable injection materials and construction methods.

The most important factor in the backside grouting for filling the cavity of the tunnel lining backside is that the cavity must be completely filled and at the same time ensuring the injection workability. Even if the injection is completed, if the bleeding is generated a lot, the cavity is formed again, so that the grout effect can not be sufficiently exhibited, and the inconvenience of performing the second or more injection is followed. Also, in terms of workability, if sedimentation of sand or the like in the injection material occurs, that is, separation of material occurs, the injection tube is clogged and it is difficult to secure the quality of the grouting, which affects the stability of the tunnel.

The problem to be solved by the present invention is to provide a method for filling a deep portion such as a back cavity portion of a tunnel or an underground structure, a weak portion of a ground, a crack portion, etc., with excellent strength and durability and excellent fluidity, , Adhesion and waterproofing, it is possible to realize an increase in common period, reduction in maintenance cost, and improvement in workability, and it is easy to construct due to excellent fluidity and material separation phenomenon does not occur even in long distance transportation, and bleeding occurs in the course of curing It is possible to increase the stability of the reinforcing ground by maximizing the displacement resistance of the excavation surface and the pulling resistance and to improve the stability of the reinforcing ground by drying It has the effect of compensating the shrinkage, and the pH is low, so that the environmentally friendly durability and self-healing ability It is a grout material composition and grouting construction method using the same to provide.

The present invention relates to a resin composition comprising 10 to 80% by weight of a light inorganic binder, 10 to 80% by weight of fine aggregate, 0.01 to 20% by weight of a performance improving agent and 1 to 50% by weight of water, 0.1 to 20% by weight of styrene vinyl chloride copolymer, 0.1 to 20% by weight of methyl methacrylate-vinylidene chloride copolymer, 0.1 to 20% by weight of polyaryl sulfone and 0.01 to 15% by weight of lauryl acrylate Wherein the grout material composition is a durable and self-healing lightweight grout composition.

The fine aggregate preferably comprises 50 to 99% by weight of silica-based silica having a particle diameter in the range of 0.01 to 2 mm and 1 to 50% by weight of bottom ash.

The performance improving agent may further include 0.001 to 5% by weight of an anti-segregation agent mixed with starch and carboxymethylcellulose in a weight ratio of 1: 0.05 to 0.5 in order to improve viscosity and material separation resistance.

The performance improving agent may further include 0.001 to 5% by weight of polyamide.

In addition, the performance improving agent may further include 0.001 to 5 wt% of at least one fluidizing agent selected from a polycarboxylic acid-based fluidizing agent, a naphthalene-based fluidizing agent and polyethylene oxide to improve self-leveling property.

The inorganic bonding material is a light weight powder also has 3,500 ~ 8,000cm ² / g of particulate cement even 20-90% by weight, 1 to 20% by weight of calcium aluminate, blast furnace slag, 0.1 to 20% by weight, 0.1 to 20% by weight metakaolin, 0.1 to 10% by weight of calcium aluminate, 0.1 to 10% by weight of zeolite, 0.001 to 10% by weight of pumice and 0.01 to 10% by weight of retarder can do.

The light inorganic binder may further include 0.001 to 5% by weight of at least one selected from the group consisting of polycarboxylic acids, naphthalene, melamine and lignin.

According to the present invention, there is also provided a method of detecting leakage, comprising the steps of: confirming a leaking area in accordance with a leaking amount, leaking area, concrete condition, leak area, Determining the location of the injection port by determining the range of influence, puncturing the surface from the surface using a perforation apparatus in a lattice or radial form toward the ground, and installing the injection tube in the perforation hole after perforation The method comprising the steps of injecting the durable and self-healing lightweight grout composition by hydraulic or no pressure, and treating the finished surface to maintain the same hue as the surrounding surface after curing.

The durability and self-repairing lightweight grout composition according to the present invention is excellent in field applicability, workability, durability, adhesion, self-healing property and waterproof property, and can increase the public period, reduce maintenance cost and improve workability.

Further, the durable and self-healing lightweight grout composition of the present invention is excellent in fluidity and is easy to apply and cures within a short period of time, shortening the construction period and reducing the construction cost.

Further, the durable and self-healing lightweight grout composition of the present invention can maximize the resistance to displacement and restraint of excavation on the excavated surface, increase the stability of the reinforced ground, and can compensate for drying shrinkage It is effective.

In addition, unlike conventional grout inflators, the durable and self-healing lightweight grout composition of the present invention has a self-healing property at the same time as continuous inflation is performed for a certain period of time after curing, Erosion, loss, etc. can be prevented.

Further, the durable and self-healing lightweight grout composition of the present invention is excellent in strength and durability and is excellent in fluidity, and can be used as a backing for tunnel construction, a hollow of an underground structure, a trench excavation surface, ), Cracks, etc., and it is possible to quickly reinforce the ground, thereby preventing erosion and loss of soil.

Hereinafter, preferred embodiments according to the present invention will be described in detail. However, it should be understood that the following embodiments are provided so that those skilled in the art will be able to fully understand the present invention, and that various modifications may be made without departing from the scope of the present invention. It is not.

The durable and self-healing lightweight grout composition according to a preferred embodiment of the present invention includes lightweight inorganic binders, fine aggregates, performance improvers and water. Preferably, the durable and self-healing lightweight grout composition comprises 10 to 80 wt% of light inorganic binder, 10 to 80 wt% of fine aggregate, 0.01 to 20 wt% of performance improver, and 1 to 50 wt% of water.

The fine aggregate is preferably contained in an amount of 10 to 80% by weight based on the durable and self-healing lightweight grout composition. The fine aggregate preferably comprises 50 to 99% by weight of silica-based silica having a particle diameter in the range of 0.01 to 2 mm and 1 to 50% by weight of bottom ash. The bottom ash is an industrial by-product obtained from a thermal power plant, and is used to develop long-term strength and light weight as latent hydraulics.

The lightweight inorganic binder is preferably contained in an amount of 10 to 80% by weight based on the lightweight grout composition for durability and self-healing. The inorganic bonding material is a light weight powder also has 3,500 ~ 8,000cm ² / g of particulate cement even 20-90% by weight, 1 to 20% by weight of calcium aluminate, blast furnace slag, 0.1 to 20% by weight, 0.1 to 20% by weight metakaolin, 0.1 to 10% by weight of calcium aluminate, 0.1 to 10% by weight of zeolite, 0.001 to 10% by weight of pumice and 0.01 to 10% by weight of retarder .

It is preferable to use the fine graded cement specified in KS, and the fine graded cement preferably contains 20 to 90% by weight based on the weight of the inorganic binder.

The calcium aluminate is an inorganic quick-setting material, and when mixed with cement, the compressive strength of ordinary portland cement obtained in several days or several days can be obtained within a few hours. The calcium aluminate is preferably contained in an amount of 1 to 20% by weight based on the light inorganic binder. When the content of the calcium aluminate is less than 1% by weight, initial strength development and durability performance may be insufficient. If the content is more than 20% by weight, workability and price competitiveness may be deteriorated.

The blast furnace slag and metha-kaolin are inorganic hydrates of the hydration and pozzolanic reaction and enhance the long-term strength of the cement hardened body and improve the chemical resistance and durability by tightening the hydrated structure of the cured hardened body. The blast furnace slag and the meta kaolin are preferably contained in an amount of 0.1 to 20 wt% with respect to the light inorganic binder. When the total content of the blast furnace slag and the meta kaolin is less than 0.2% by weight, the effect of improving the long-term strength and improving the durability may be insignificant. If the content exceeds 40% by weight, the initial strength development may be delayed.

The phyllotaxin powder is a natural pozzolanic substance and is used to improve the long-term strength development, exponent, waterproofing and self-healing by densely forming a tissue by reacting with cement hydrate Ca (OH) ₂ . The cyanophyll powder is preferably contained in an amount of 0.1 to 20% by weight based on the light inorganic binder. If the content of the cyanophyll powder is less than 0.1 wt%, the effect of improving the long-term strength, durability and self-healing property may be insignificant. If the content exceeds 20 wt%, the initial strength development is delayed and the economical efficiency is lowered.

The gypsum is used to improve the strength and durability by making the needle-like structure etrinzite to make the structure dense. The gypsum may be an anhydrous gypsum or an alumite. It is possible to use quicklime and desulfurization gypsum in place of the gypsum. The gypsum is preferably contained in an amount of 0.1 to 15% by weight with respect to the light inorganic binder. If the content of the gypsum is less than 0.1 wt%, the dense structure is not formed and the effect of improving the performance may be insignificant. If the content of the gypsum exceeds 15 wt%, the coagulation delay and the expansion crack may occur.

The calcium aluminate is mixed with gypsum and reacted when mixed with water to form etlin zeite, which is used when it is mixed with cement to be swellable to prevent drying shrinkage. The calcium aluminate is preferably contained in an amount of 0.1 to 10% by weight based on the weight of the inorganic binder. If the content of calcium aluminate is less than 0.1% by weight, it is difficult to expect sufficient initial strength development and shrinkage reduction effect. If the content of calcium aluminate exceeds 10% by weight, shrinkage reduction effect is excellent but workability may be deteriorated.

The zeolites are used to improve the viscosity and material separation resistance of durable and self-healing lightweight grout compositions. The zeolite is preferably contained in an amount of 0.1 to 10 wt% with respect to the light inorganic binder. If the content of the zeolite is less than 0.1% by weight, the effect of improving the viscosity and the material separation resistance may be insignificant. If the content exceeds 10% by weight, viscosity and workability may be lowered.

The pumice is used to improve fire resistance and acid resistance and to lighten durability and self-healing lightweight grout compositions. The pumice is preferably contained in an amount of 0.001 to 10 wt% with respect to the light inorganic binder. If the content of the pumice is less than 0.001% by weight, the durability, fire resistance and lightening effect may be insignificant. If the content is more than 10% by weight, workability and strength may be lowered.

The retarder is used for delaying rapid curing in order to ensure workability for a predetermined period of time, and it is preferable that the retarder is contained in an amount of 0.01 to 10 wt% with respect to the light inorganic binder. Examples of the delaying agent include generally known substances such as glucose, glucose, a sugar such as dextran, glucuronic acid, malic acid, citric acid, an acid such as citric acid or a salt thereof, an aminocarboxylic acid, A salt thereof, a phosphonic acid or a derivative thereof, and a polyhydric alcohol such as glycerin. If the content of the retarder is less than 0.01% by weight, the reaction delay effect may be insignificant. If the content exceeds 10% by weight, the reaction may be accelerated and the workability may be deteriorated.

The light inorganic binder may further include at least one material selected from the group consisting of polycarboxylic acid, naphthalene, melamine and lignin-based water reducing agents. The at least one material selected from the group consisting of the polycarboxylic acid, the naphthalene, the melamine and the lignin-based water reducing agent is dense in the internal structure of the cement hardened body to improve watertightness and freeze-thaw resistance and improve durability. It also facilitates penetration into voids by adding both viscous and fluidic properties to unsettled cement mortar. It is preferable that at least one material selected from the above polycarboxylic acid, naphthalene, melamine and lignin-based water reducing agents is contained in an amount of 0.001 to 5 wt% based on the light inorganic binder.

The performance improving agent may be dispersed in a cement hardened material to form a film in the cured hardened material to improve warpage, tensile and adhesion strength, improve water retention, improve durability such as neutralization, chloride ion penetration, freezing and thawing, (Self-leveling) and gives waterproofness. The performance improving agent is preferably contained in an amount of 0.01 to 20% by weight based on the durable and self-healing lightweight grout composition.

Wherein the performance improving agent is selected from the group consisting of 75 to 99% by weight of an ethylene-vinyl acetate copolymer, 0.1 to 20% by weight of a styrene-vinyl chloride copolymer, 0.1 to 20% by weight of a methyl methacrylate-vinylidene chloride copolymer, And 0.01 to 15% by weight of lauryl acrylate.

The ethylene-vinyl acetate copolymer not only improves warpage, tensile and adhesion strength by forming a polymer film in the durable and self-healing lightweight grout composition, but also improves durability due to the polymer film. The ethylene vinyl acetate copolymer is preferably contained in an amount of 75 to 99% by weight based on the performance improving agent. If the content of the ethylene-vinyl acetate copolymer is less than 75% by weight, the effect of improving the strength and durability may be insignificant. If the content is more than 99% by weight, the effect of improving the strength and durability is remarkable.

The styrene-vinyl chloride copolymer is used for improving ductility and dispersibility. The styrene-vinyl chloride copolymer is preferably contained in an amount of 0.1 to 20% by weight based on the performance improving agent. If the content of the styrene-vinyl chloride copolymer is less than 0.1% by weight, the effect of improving ductility and dispersibility may be insignificant. If the content exceeds 20% by weight, ductility is improved but material separation phenomenon tends to occur.

The methyl methacrylate-vinylidene chloride copolymer has excellent adhesion strength after curing, and enhances the strength of the cement to prevent desorption after bonding. The methyl methacrylate-vinylidene chloride copolymer is preferably contained in an amount of 0.1 to 20% by weight based on the performance improving agent. If the content of the methyl methacrylate-vinylidene chloride copolymer is less than 0.1% by weight, the effect of improving the bonding strength may be insignificant. If the content is more than 20% by weight, the viscosity may increase and the workability may be deteriorated.

The polyarylsulfones are used to improve the durability and alkali resistance of durable and self-healing lightweight grout compositions. The polyaryl sulfone is preferably contained in an amount of 0.1 to 20% by weight based on the performance improving agent. If the content of the polyarylsulfone is less than 0.1% by weight, the effect of improving durability and alkali resistance may be insignificant. If the content is more than 20% by weight, the viscosity is lowered and the material separation phenomenon tends to occur.

The lauryl acrylate is used for improving the surface hardness and the water resistance. The lauryl acrylate is preferably contained in an amount of 0.01 to 15% by weight based on the performance improving agent. When the content of the lauryl acrylate is less than 0.01% by weight, the effect of improving surface hardness and water resistance may be insignificant. When the content exceeds 15% by weight, the viscosity increases and the workability is lowered.

The performance improving agent may further include a material deterioration inhibitor mixed with starch and carboxymethylcellulose at a weight ratio of 1: 0.05-0.5 in order to prevent material separation, and the detergent agent may be added in an amount of 0.001 to 5 By weight.

In addition, the performance improving agent may further include polyamide to improve tensile strength, heat resistance, cold resistance, chemical resistance and abrasion resistance, and the polyamide is preferably contained in an amount of 0.001 to 15% by weight based on the performance improving agent.

Further, the performance improving agent may further include at least one fluidizing agent selected from a polycarboxylic acid-based fluidizing agent, a naphthalene-based fluidizing agent and a polyethylene oxide to improve self-leveling, and the polycarboxylic acid-based fluidizing agent, the naphthalene- , And polyethylene oxide is preferably contained in an amount of 0.001 to 5 wt% based on the performance improving agent.

The performance improving agent may further include a defoaming agent, and the defoaming agent is preferably contained in an amount of 0.01 to 5% by weight based on the performance improving agent. The antifoaming agent may be composed of at least one material selected from the group consisting of polyethers, silicones, ethyl alcohols and ethylene glycols.

The durable and self-healing lightweight grout composition according to a preferred embodiment of the present invention can be prepared by mixing a performance improver, a lightweight inorganic binder, a fine aggregate and water, wherein the lightweight inorganic binder comprises the durable and self- Wherein the fine aggregate is contained in an amount of from 10 to 80% by weight based on the weight of the composition and the fine aggregate is contained in an amount of from 1 to 80% by weight based on the durable and self-healing lightweight grout composition, By weight based on the weight of the lightweight grout composition, and the water is contained in an amount of 1 to 50% by weight based on the lightweight grout composition.

The grouting method using a durable and self-healing lightweight grout composition according to a preferred embodiment of the present invention includes steps of confirming a leakage area according to a leakage amount, a leakage area, a concrete condition, and a leakage area investigation, Determining a position of the injection port by determining an injection interval and an injection range of impact, and drilling the hole using a perforation apparatus in a lattice or radial form from the surface to the ground, A step of injecting the durable and self-healing lightweight grout composition with hydraulic or non-pressurized fluid into the perforated hole after drilling, and a step of injecting the durable and self- .

Hereinafter, embodiments of the durable and self-healing lightweight grout composition according to the present invention will be more specifically shown and the present invention is not limited by the following embodiments.

≪ Example 1 >

40 wt.% Of light inorganic binder, 45 wt.% Of fine aggregate and 5 wt.% Of performance improver were added to a forced mixer and stirred. Then, 10 wt.% Of water was further mixed and then stirred for 2 minutes to obtain a durable and self-healing lightweight grout composition . The fine aggregate used was 50 to 99% by weight of silica-based silica having a particle diameter in the range of 0.01 to 2 mm and 1 to 50% by weight of bottom ashes.

At this time, the lightweight inorganic binder is composed of 58 wt% of fine-grained cement, 5 wt% of calcium aluminate, 5 wt% of blast furnace slag, 5 wt% of meta kaolin, 5 wt% of phyllotaxis powder, 5 wt% of gypsum, , 5% by weight of zeolite, 5% by weight of pumice, 1% by weight of retarder and 1% by weight of water reducing agent. A polycarboxylic acid-based water reducing agent was used as the water reducing agent, and citric acid was used as the retarding agent.

The performance improving agent was prepared by mixing 90 wt% ethylene vinyl acetate copolymer, 2 wt% styrene vinyl chloride copolymer, 2 wt% methyl methacrylate-vinylidene chloride copolymer, 2 wt% polyarylsulfone, 2 wt% 0.5% by weight of a material separation preventing agent, 0.5% by weight of a polyamide, 0.5% by weight of a silicone-based defoaming agent, and 0.5% by weight of a fluidizing agent. The material separation preventing agent used was a mixture of starch and carboxymethylcellulose mixed at a weight ratio of 1: 0.2. The fluidizing agent used was a polycarboxylic acid-based fluidizing agent.

≪ Example 2 >

40 wt.% Of light inorganic binder, 45 wt.% Of fine aggregate and 5 wt.% Of performance improver were added to a forced mixer and stirred. Then, 10 wt.% Of water was further mixed and then stirred for 2 minutes to obtain a durable and self-healing lightweight grout composition . The fine aggregate used was 50 to 99% by weight of silica-based silica having a particle diameter in the range of 0.01 to 2 mm and 1 to 50% by weight of bottom ashes.

At this time, the lightweight inorganic binder is composed of 58 wt% of fine-grained cement, 5 wt% of calcium aluminate, 5 wt% of blast furnace slag, 5 wt% of meta kaolin, 5 wt% of phyllotaxis powder, 5 wt% of gypsum, , 5% by weight of zeolite, 5% by weight of pumice, 1% by weight of retarder and 1% by weight of water reducing agent. A polycarboxylic acid-based water reducing agent was used as the water reducing agent, and citric acid was used as the retarding agent.

The performance improving agent was composed of 82 wt% of ethylene vinyl acetate copolymer, 4 wt% of styrene vinyl chloride copolymer, 4 wt% of methyl methacrylate-vinylidene chloride copolymer, 4 wt% of polyaryl sulfone, 4 wt% of lauryl acrylate, 0.5% by weight of a material separation preventing agent, 0.5% by weight of a polyamide, 0.5% by weight of a silicone-based defoaming agent, and 0.5% by weight of a fluidizing agent. The material separation preventing agent used was a mixture of starch and carboxymethylcellulose mixed at a weight ratio of 1: 0.2. The fluidizing agent used was a polycarboxylic acid-based fluidizing agent.

≪ Example 3 >

40 wt.% Of light inorganic binder, 45 wt.% Of fine aggregate and 5 wt.% Of performance improver were added to a forced mixer and stirred. Then, 10 wt.% Of water was further mixed and then stirred for 2 minutes to obtain a durable and self-healing lightweight grout composition . The fine aggregate used was 50 to 99% by weight of silica-based silica having a particle diameter in the range of 0.01 to 2 mm and 1 to 50% by weight of bottom ashes.

At this time, the lightweight inorganic binder is composed of 58 wt% of fine-grained cement, 5 wt% of calcium aluminate, 5 wt% of blast furnace slag, 5 wt% of meta kaolin, 5 wt% of phyllotaxis powder, 5 wt% of gypsum, , 5% by weight of zeolite, 5% by weight of pumice, 1% by weight of retarder and 1% by weight of water reducing agent. A polycarboxylic acid-based water reducing agent was used as the water reducing agent, and citric acid was used as the retarding agent.

The performance improving agent was prepared by mixing 74 wt% ethylene vinyl acetate copolymer, 6 wt% styrene vinyl chloride copolymer, 6 wt% methyl methacrylate-vinylidene chloride copolymer, 6 wt% polyaryl sulfone, 6 wt% lauryl acrylate, 0.5% by weight of a material separation preventing agent, 0.5% by weight of a polyamide, 0.5% by weight of a silicone-based defoaming agent, and 0.5% by weight of a fluidizing agent. The material separation preventing agent used was a mixture of starch and carboxymethylcellulose mixed at a weight ratio of 1: 0.2. The fluidizing agent used was a polycarboxylic acid-based fluidizing agent.

In order to compare the physical properties of the durable and self-healing lightweight grout composition prepared according to the above-mentioned Examples 1 to 3, cement mortar compositions which are generally widely used at present are presented as Comparative Example 1 and Comparative Example 2. [

≪ Comparative Example 1 &

40% by weight of Portland cement and 45% by weight of fine aggregate were added to a forced mixer and stirred. Further, 15% by weight of water was further mixed and stirred for 2 minutes to prepare a cement mortar composition. Silica silicate was used as the fine aggregate.

≪ Comparative Example 2 &

The polymer cement mortar composition was prepared by mixing 40 wt% of cement at a very early speed, 45 wt% of fine aggregate, and 5 wt% of ethylene vinyl acetate copolymer into a forced mixer, stirring the mixture, mixing 10 wt% . At this time, a citric acid delaying agent was used in an amount of 0.5% by weight based on the ultra fast cement. Silica silicate was used as the fine aggregate.

The following test examples show experimental results in which the characteristics according to the present invention are compared with the characteristics of Comparative Example 1 and Comparative Example 2 in order to more easily grasp the characteristics of Examples 1 to 3 according to the present invention .

≪ Test Example 1 >

According to the formulation shown in Examples 1 to 3 and Comparative Examples 1 to 2, KS F 4044 (hydraulic cement non-shrinkable grout) was used to determine the dropping time, flow, settling time, bleeding rate, And the amount of chloride was measured. The densities of the slurry and the dried state were measured to determine the light weight. The results are shown in Table 1 below.

division Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Falling time (seconds) 50 49 48 51 50 Flow (mm) 305 312 318 300 302 Setting time
(Hours, minutes) Superfine 4.10 4.45 4.55 6.15 4.15 End 2.45 3.10 3.18 9.45 3.55 Bleeding rate (%) 0.2 0.1 0.05 0.32 0.26 Expansion Height (%) 28th 0.08 0.06 0.045 -2.2 (contraction) 0.15 Compressive strength
(N / mm ² ) 1 day 20.8 23.5 26.0 15.0 20.0 3 days 43.0 47.1 49.2 26.7 42.0 7 days 52.8 55.5 58.8 32.8 51.0 28th 62.8 65.7 68.5 55.0 61.0 Amount of chloride (kg / m ³ ) 0.03 0.021 0.012 0.05 0.04 density Slurry 1.81 1.82 1.82 1.91 1.88 dry 1.71 1.72 1.72 1.82 1.79

As shown in Table 1, it was found that the compositions prepared according to Examples 1 to 3 exhibited excellent performance as compared with the compositions prepared according to Comparative Example 1 and Comparative Example 2.

≪ Test Example 3 >

The absorption amount was measured by KS F 4919 according to the formulations shown in Examples 1 to 3 and Comparative Examples 1 to 2, and the results are shown in Table 2 below.

division Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Absorption (g) 2.0 1.1 1.0 2.4 2.1

As shown in Table 2, it can be seen that the compositions prepared according to Examples 1 to 3 have very low water absorption as compared with the compositions prepared according to Comparative Examples 1 and 2. [ From the results, it was found that the composition prepared according to Examples 1 to 3 was excellent in the water resistance improving effect after the application as compared with the composition prepared according to Comparative Example 1 and Comparative Example 2.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, This is possible.

Claims (6)

A lightweight grout material composition injected for filling a back cavity of a tunnel or an underground structure, a fragile or cracked portion of the ground,
10 to 80 wt% of a light inorganic binder, 10 to 80 wt% of a fine aggregate, 0.01 to 20 wt% of a performance improving agent, and 1 to 50 wt%
Wherein the performance improving agent is selected from the group consisting of 75 to 99% by weight of an ethylene-vinyl acetate copolymer, 0.1 to 20% by weight of a styrene-vinyl chloride copolymer, 0.1 to 20% by weight of a methyl methacrylate-vinylidene chloride copolymer, 0.01 to 15% by weight of lauryl acrylate, 0.001 to 5% by weight of a material separation preventing agent mixed with starch and carboxymethylcellulose in a weight ratio of 1: 0.05 to 0.5, 0.001 to 5% by weight of polyamide, A naphthalene-based fluidizing agent, and polyethylene oxide, wherein the fluidizing agent comprises 0.001 to 5 wt%
The fine aggregate comprises 50 to 99% by weight of silica-based silica having a particle diameter in the range of 0.01 to 2 mm and 1 to 50% by weight of bottom ash,
The inorganic bonding material is a light weight powder also has 3,500 ~ 8,000cm ² / g of particulate cement even 20-90% by weight, 1 to 20% by weight of calcium aluminate, blast furnace slag, 0.1 to 20% by weight, 0.1 to 20% by weight metakaolin, 0.1 to 10% by weight of calcium aluminate, 0.1 to 10% by weight of zeolite, 0.001 to 10% by weight of pumice, 0.01 to 10% by weight of retarding agent, and 0.1 to 10% 0.001 to 5% by weight of at least one material selected from the group consisting of polycarbonate, naphthalene, melamine and lignin,
As a result of measurement by KS F 4044 (hydraulic cement shrinkage grout), the dropping time (sec) was 48 to 50, the flow (mm) was 305 to 318 and the compressive strength (N / mm ² ) The density was 1.81 ~ 1.82 in the slurry state, and 1.71 ~ 1.72 in the dry state.
≪ / RTI > wherein the grout material composition comprises at least one material selected from the group consisting of silica,
delete delete delete delete A grouting method using the durable and self-healing lightweight grout composition according to claim 1,
A planning and preparation step of confirming a leakage area, setting a puncturing diameter, determining an injection position and determining an injection amount;
Determining an injection gap and an injection impact range to determine an injection port position;
Drilling through the perforation equipment in a lattice or radial form from the surface towards the ground;
Installing the injection tube in the perforation hole after perforation;
Injecting said durable and self-healing lightweight grout composition with hydraulic or no pressure with an installed injection tube; And
Treating the finished surface to maintain the same color as the surrounding surface after curing.