KR101103367B1 - Filler for lining material, lining material comprising the same, and lining conduit repairing and reinforcing method usning the same - Google Patents

Abstract

PURPOSE: A filler for a lining material, the lining material including the same, and a lining conduit repairing technique using the same are provided to improve the adhesion, the compressive intensity, and the fluidity of the filler and to shorten a time required for an initial hardening process. CONSTITUTION: A filler for a lining material includes 47-72 weight% of cement, 20-50 weight% of silica, 1-3 weight% of CSA, 0.7-1.7 weight% of metakaolin, 0.1-1.5 weight% of naphthalene, 0.1-0.6 weight% of polyacryl amide, 0.3-1.5 weight% of sodium silicate, and 0.1-1.4 weight% of alkali metal silicate. The cement is composed of high early strength Portland cement and alumina cement. The weight ratio of the high early strength Portland cement and the alumina cement is 34 to 29:13 to 23.

Description

Filling material for lining material, lining material containing it and lining pipeline repairing method using same {FILLER FOR LINING MATERIAL, LINING MATERIAL COMPRISING THE SAME, AND LINING CONDUIT REPAIRING AND REINFORCING METHOD USNING THE SAME}

Filling material for linings, linings comprising the same and lining pipeline repairing reinforcement method using the same.

The unexcavated pipeline repair method is a method of winding lining material in an old buried pipeline without digging the ground when reinforcing sewer pipes buried underground. It is an excellent method in many ways such as convenience.

In addition, the existing pipe repairing method is one of such unexcavated pipe repairing methods. The hard lining material is introduced through the manhole, and the lining material is spirally wound and installed inside the pipe, and then the joining member is used between the lining material and the lining material. It is a method of injecting filler into the space between the lining tube and the existing installed tube after newly forming a continuous lining tube by joining.

However, the filling materials used in this process have a poor adhesion between the lined pipe and the existing pipe line due to the failure of adhesion, flowability, and compressive strength. There is a problem of strength drop due to falling of the lining material and compressive strength below the standard caused by insufficient filling material into the voids.

The present invention can improve the adhesion to reduce the problem of the later defects, improve the fluidity to improve the strength of the repaired pipeline by using it, the workability is also improved, the cost of construction is saved by saving labor costs, compressive strength Filling materials for linings, linings, and the like, which are strong and shorten the initial curing time, so that linings lined with fillers during the reinforcement process of lining pipelines are in close contact with the existing pipelines before changing their shape. It is to provide a reinforcement method for lining pipeline using this.

One embodiment of the present invention is to provide a filler for the reinforcement method for lining pipelines including cement, silica sand, CSA, metakaolin, naphthalene, polyacrylamide, sodium silicate, alkali metal silicate.

Another embodiment of the present invention the filler is 47 to 72% by weight cement; 20-50% by weight of silica sand; CSA 1-3 wt%; 0.7-1.7 weight percent metakaolin; Naphthalene 0.1-1.5 wt%; 0.1% to 0.6% polyacrylamide; 0.3-1.5 wt% sodium silicate; And it is to provide a filler for the reinforcing reinforcement method lining pipe containing 0.1 to 1.4% by weight of alkali metal silicate.

Another embodiment of the present invention is to provide a filler for the lining pipeline repair reinforcement method that the cement is composed of three kinds of crude steel cement and alumina cement.

Another embodiment of the present invention is to provide a filling material for the reinforcing reinforcement method for the lining pipeline, wherein the cement has a weight ratio of three kinds of crude steel cement to alumina cement 34 to 49:13 to 23.

Another embodiment of the present invention is to provide a filler for the lining pipeline repair reinforcement method that is composed of the first silica sand with a diameter of 0.85 to 1.2 mm and the second silica sand with a diameter of 0.6 to 0.85 mm.

Another embodiment of the present invention is to provide a filling material for the reinforcing method of the lining pipe line with the weight ratio of the first silica sand to second silica sand 13 to 23: 7 to 27.

Another embodiment of the present invention is to provide a lining material comprising the filler.

Another embodiment of the present invention is the lining material provides a lining material consisting of at least one selected from glass filament, unsaturated polyester resin, polyurethane, aerosil, hard magnesium, epoxy resin, vinyl chloride and low shrinkage agent will be.

Another embodiment of the present invention is to provide a lining pipe repair reinforcement method using the lining material.

Other specific details of embodiments of the present invention are included in the following detailed description.

Filling material for lining material according to the present invention, the lining material comprising the same and the lining pipeline repair reinforcement method using the same to improve the adhesion of the filler to reduce the problem of the defects later, to improve the fluidity of the filler to improve the strength of the pipeline repaired using the same The workability is also improved, which saves labor costs, saves construction costs, compressive strength is strong, and the initial curing time of the filling material is shortened so that the lining material lined with the filling material during the reinforcing process of the lining pipe can be changed. Since there is a close contact with the existing pipeline, there is no fear of defects during construction.

Hereinafter, embodiments of the present invention will be described in detail. However, it should be understood that the present invention is not limited thereto, and the present invention is only defined by the scope of the following claims.

According to one embodiment of the present invention, it is to provide a filler for lining material comprising cement, silica sand, CSA, metakaolin, naphthalene, polyacrylamide, sodium silicate, alkali metal silicate.

The cement is preferably composed of three kinds of crude steel cement and alumina cement. Specifically, the three kinds of crude steel cement has the effect of promoting the condensation, and increases the curing speed in the initial congealing role to initially stabilize the hardening properties for various soil properties, the alumina cement is It has excellent chemical property and forms the structure of dense hardened body during hardening to express high strength, promotes initial hardening, prevents decrease of hydraulic property of concrete by fine particles and organic matter, and also strengthens strong dispersibility and cohesiveness. In this regard, the cement according to the present invention is preferably one consisting of three kinds of crude steel cement and alumina cement.

The cement preferably has a weight ratio of three kinds of crude steel cement to alumina cement of 34 to 49:13 to 23. When the weight ratio of the three types of crude steel cement to alumina cement is within the above range, it is possible to obtain an effect of shortening the time when the filler including the same is cured.

The cement may be included in 47 to 72% by weight of the filler. When the cement is in the above range it can be obtained the effect of increasing the compressive strength of the cured body of the filler including the same.

The silica sand is preferably composed of a first silica sand having a diameter of 0.85 to 1.2 mm and a second silica sand having a diameter of 0.6 to 0.85 mm. In detail, the first silica sand plays a role of providing the strength of the filler, and the second silica sand plays a role of the strength of the filler. In particular, the second silica sand enters the gap between the first silica sand to form the void. It plays a role in puncturing, which can lead to greater intensity.

The silica sand preferably has a weight ratio of 13 to 23: 7 to 27 of the first silica sand to the second silica sand. Silica is used to fill the voids when the components are hardened when the filler is hardened. At this time, the smaller the particles, the better the magnetic performance. When the silica particles are too small, the viscosity of the filler becomes large, which causes the slump value to decrease. As a result, the unit yield of cement increases, and the economical efficiency decreases. The lower slump value means that the flowability of the cured product is lowered, and the workability is also lowered, which may cause a great problem in workability. When the weight ratio of the first silica sand to the second silica sand is within the above range, filling the voids generated when the filler is cured may increase the strength thereof, and the slump value having no problem in workability may be obtained.

The silica sand may be included in 20 to 50% by weight of the filler. When the ratio of silica sand exceeds 50% by weight, the amount of cement decreases and the amount of sand increases, resulting in empty mixing, which causes disadvantages in the mixing of the beams, the strength of the filler, and the separation of materials. In addition, when the content of silica sand is less than 20% by weight, heat of hydration is generated a lot during the curing process, and cracks are likely to occur. Within the above range, the most effective strength and workability can be obtained.

The CSA is Si0 ₂ 1-5%, AL ₂ O ₃ 8-15%, Fe ₂ O ₃ 0.3-2%, CaO 50-55% MgO 0.5-2%, SO ₃ 27-31%, F-CaO 16 A mixture consisting of ˜18% of content, usually abbreviated CSA by abbreviated material name. The CSA has similar properties to lime quicklime, but has initial and long term expansion.

The CSA may be included in 1 to 3% by weight of the filler. If the content of the CSA is less than 1% by weight, there is a problem in that the shrinkage of the filler is not controlled. If the content of the CSA is more than 3%, the expansion of the filler occurs.

The metakaolin increases the initial strength and serves to express high strength, it may be included in the filler 0.7 to 1.7% by weight. When the content of metakaolin is within the above range, the initial strength is increased by the production of ettringite and activation of C ₃ S in cement in the short term, and the calcium hydroxide produced by the hydration reaction of cement is used for strength expression. Transitioning to calcium silicate hydrate having more excellent properties has the effect of reducing the defects of the lower aggregate and increasing the adhesion with the aggregate to enable high-strength expression.

The naphthalene serves to give a sufficient slump value even if less water is used as a water soluble dispersant. In general, the strength when the filler is cured is proportional to the content of cement / water contained in the filler, so the naphthalene can reduce the water content to increase the strength when the filler is cured, and ensure sufficient fluidity to uniformly aggregate the aggregates. To be distributed.

The naphthalene may be included in 0.1 to 1.5% by weight of the filler. If the content of the naphthalene is less than 0.1% by weight, the effect is insignificant, and if the content exceeds 1.5% by weight, the air is significantly increased, resulting in a problem that the adhesion strength with the existing pipe, lining material, joining material falls, It may adversely affect workability and finish, and due to delayed condensation, poor curing and material separation problems occur. The polyacrylamide serves to improve the water retention and durability of the filler, it may be included in 0.1 to 0.6% by weight in the filler. When the content of the polyacrylamide is less than 0.1% by weight, it is difficult to expect sufficient effect of improving water retention and durability, and when it exceeds 0.6% by weight, it is difficult to expect the effect of further improving the effect of water retention and durability.

The sodium silicate serves to implement excellent water resistance, it may be included in 0.3 to 1.5% by weight in the filler. If the content of sodium silicate is less than 0.3% by weight, it is difficult to express sufficient water resistance, and when it exceeds 1.5% by weight, there is a problem in that workability during pouring of the filler is reduced.

The alkali metal silicate serves to promote hardening and express high stiffness as an adjuvant when curing alumina cement. The alkali metal silicate may be included in 0.1 to 1.4% by weight of the filler. The content of the alkali metal silicate should be adjusted according to the amount of alumina cement used, and if the content is less than 0.1% by weight, it is difficult to secure initial stability due to the difficulty of expressing super fast hardening, and when the content exceeds 1.4% by weight, the expansion mechanism works. As a result, there is a problem of lowering the strength physical properties.

According to another embodiment of the present invention, it is to provide a lining material comprising the filler described above.

The lining material is light, has excellent durability, impact resistance, abrasion resistance, and the like, does not rust, and is not deformed by heat. In the case of the existing lining material, the lining material having a high strength with low adhesion performance due to the heterogeneity of the filler and the lining material Even in the case of the filler, the performance of the lining material and the filler is drastically deteriorated or it is difficult to exhibit the performance. The lining material, including the filler, contributes to reducing the heterogeneity between the two materials during construction, and has an additional property of increasing adhesion.

The lining material may be made of any one or more selected from glass filament, unsaturated polyester resin, polyurethane, aerosil, hard magnesium, epoxy resin, vinyl chloride and a low shrinkage agent.

According to another embodiment of the present invention, there is provided a lining pipeline repair reinforcing method for construction using the above-described lining material.

The lining pipeline repair reinforcement method is also called a non-excavated pipe repair reinforcement method as a construction method commonly carried out in the field to which the present invention belongs, and more specifically, to clean the inside of the pipeline by using a high-pressure washing equipment and pipeline dredge vehicle After the pretreatment, the lining material is introduced into the pipe through the manhole hole, and the end pipe is drilled in close contact with the pipe. When manufacturing, the joining material is brought in so that the lining material and the joining material are introduced in each direction. The most important thing in this case should be to prevent the filler from leaking when filling the filler according to the present invention for the sealing of the joining material and the lining material. The lining material and the joining material may include vinyl chloride, glass fiber reinforced plastic.

Subsequently, the filler according to the present invention should be injected into the gap between the existing pipe and the pipe manufactured, the injection hose is injected into the gap, and the filler according to the present invention is injected through the injection hose.

In the present invention, by constructing a pipeline repair reinforcement method using a lining agent containing a filler consisting of the above-described components, to improve the adhesion of the filler to reduce the problem of defects later, to improve the fluidity of the filler to repair by using It is possible to increase the strength of a single pipe, and workability is also smooth, which saves labor costs, saves construction cost, compressive strength, and shortens the initial hardening time of the filling material. Before changing the shape, it is in close contact with the existing pipeline, so it is possible to obtain an effect without fear of defects during construction.

Hereinafter, preferred examples and comparative examples of the present invention are described. However, the following embodiments are merely preferred embodiments of the present invention, and the present invention is not limited to the following embodiments.

Example  1 and Comparative example  1 to 5

Each component of the filler for lining material was measured and mixed in the content shown in Table 1 to prepare a filler.

Content (% by weight) Example Comparative example One 2 3 One 2 3 4 5 cement 59 ⁽¹⁾ 59 ⁽²⁾ 62 ⁽¹⁾ 50 ⁽¹⁾ 61 ⁽¹⁾ 55 ⁽¹⁾ 57 ⁽¹⁾ 57 ⁽¹⁾ Quartz sand 35 ⁽³⁾ 35 ⁽³⁾ 35 ⁽⁴⁾ 50 ⁽³⁾ 35 ⁽³⁾ 41 ⁽³⁾ 39 ⁽³⁾ 38.15 ⁽³⁾ CSA 2 2 One 0 0 2 2 2 Metakaolin 1.2 1.2 0.7 0 1.2 0.7 0 1.2 naphthalene 0.8 0.8 0.3 0 0.8 0.3 0.8 0 Polyacrylamide 0.35 0.35 0.2 0 0.35 0.35 0.4 0 Sodium silicate 0.9 0.9 0.5 0 0.9 0.65 0 0.9 Alkali metal silicate 0.75 0.75 0.3 0 0.75 0 0.8 0.75

Note 1): The weight ratio of the three crude steel cements to the alumina cements is 41:18.

(2): the weight ratio of the three kinds of crude steel cement to alumina cement is 53: 6

(3): the weight ratio of the first silica sand band having a diameter of 1 mm to the second silica sand having a diameter of 0.7 mm is 18:17

(4): The weight ratio of the first silica sand band having a diameter of 1 mm to the second silica sand having a diameter of 0.7 mm is 5:30.

Filling  Characterization

Physical properties of the fillers according to Example 1 and Comparative Examples 1 to 5 were measured, and the results are shown in Tables 2 to 7, respectively.

Exam, Inspection unit Test, inspection method Test Flexural strength 3 days of age KSF 4042 8.4 7 days of age 9.3 28 days of age 10.8 Compressive strength 3 days of age 30 7 days of age 48.7 28 days of age 57.7 Bond strength 28 days of age 2.2 Length change rate 28 days of age -0.003

As shown in Table 2, Example 1 can obtain the best reinforcing effect when the repair reinforcement using the high flexural strength, adhesion strength, compressive strength, and the rate of change of length as a result of the above hydration reaction By controlling the contracting action it can be seen that this is also suitable when used as a reinforcement.

Exam, Inspection unit Test, inspection method Test Flexural strength 3 days of age KSF 4042 7.7 7 days of age 8.9 28 days of age 9.6 Compressive strength 3 days of age 27.5 7 days of age 47.7 28 days of age 51.0 Bond strength 28 days of age 1.9 Length change rate 28 days of age -0.003

As shown in Table 3, Example 2 is disadvantageous during construction due to the increase in air when the filler is hardened because the weight ratio of the three kinds of crude steel cement to alumina cement is not in the scope of the present invention as compared with Example 1 It can be seen that the overall strength is also smaller than in Example 1.

Exam, Inspection unit Test, inspection method Test Flexural strength 3 days of age KSF 4042 8.24 7 days of age 9.13 28 days of age 10.68 Compressive strength 3 days of age 28 7 days of age 46.87 28 days of age 55.4 Bond strength 28 days of age 2.1 Length change rate 28 days of age -0.003

As shown in Table 4, in Example 3, the weight ratio of the first silica sand and the second silica sand was 5:30 as compared with Example 1, and the weight ratio of the second silica sand having a smaller diameter was higher than that of Example 1.

In the case of Example 3, the rate of change of bending strength, adhesion strength, and compressive strength length was lower than that of Example 1, which means that the particles of silica sand are too small, the viscosity of the filler becomes too large, and the slump value is lowered, thereby decreasing the cement unit. As the quantity is increased as described above, the economical efficiency is also reduced. Metakaolin; naphthalene; Due to the small unit quantity of alkali metal silicates, it is difficult to achieve the most effective performance improvement.

In addition, the workability (workability) also fell at this time, the workability at the time of construction has caused a problem.

Exam, Inspection unit Test, inspection method Test Flexural strength 3 days of age KSF 4042 5.1 7 days of age 6.8 28 days of age 7.6 Compressive strength 3 days of age 15.6 7 days of age 22.8 28 days of age 28.7 Bond strength 28 days of age 1.2 Length change rate 28 days of age -0.47

As shown in Table 5, Comparative Example 1 has a lower value than all of the flexural strength, compressive strength, adhesion strength, length change rate than Example 1. It was found that the role of the filler, which only added cement and sand without adding any of the components included in the filler of the present invention, was significantly smaller.

Exam, Inspection unit Test, inspection method Test Flexural strength 3 days of age KSF 4042 6.0 7 days of age 8.1 28 days of age 9.4 Compressive strength 3 days of age 20.5 7 days of age 36.4 28 days of age 48.7 Bond strength 28 days of age 1.9 Length change rate 28 days of age -0.42

As shown in Table 6, Comparative Example 2, except for CSA, does not control the contraction of cement during the cement hydration reaction by not adding CSA, which induces an initial and long-term expansion role. It can be seen that the contraction. This can be seen that there is a problem that the filling material is subjected to shrinkage reaction when the filler is added, there is a crack, and drop off the adhesion to the lined pipe.

Exam, Inspection unit Test, inspection method Test Flexural strength 3 days of age KSF 4042 6.8 7 days of age 8.5 28 days of age 9.8 Compressive strength 3 days of age 25 7 days of age 39.8 28 days of age 51.7 Bond strength 28 days of age 2.0 Length change rate 28 days of age -0.01

As shown in Table 7, Comparative Example 3 was prepared by mixing the components except alumina cement and alkali metal silicate, the most prominent is that the value of the initial compressive strength, bending strength is lowered, which is alumina cement and alkali metal It is caused by not adding silicate. Alumina cement and alkali metal silicate are important materials for the initial compressive strength, and it can be seen that it is important to match the content ratio of alkali metal silicate to the content of alumina cement.

Exam, Inspection unit Test, inspection method Test Flexural strength 3 days of age KSF 4042 7.4 7 days of age 8.2 28 days of age 9.2 Compressive strength 3 days of age 27.5 7 days of age 46.3 28 days of age 51.7 Bond strength 28 days of age 1.4 Length change rate 28 days of age -0.02

As shown in Table 8, Comparative Example 4 was prepared by combining the components except metakaolin and sodium silicate, as a result, the bending strength, compressive strength, adhesion strength, length change rate was all lower than Example 1, in particular The decrease in adhesion strength was noticeable. The reason is that metakaolin plays a role of increasing adhesion, and it is a data generated in Comparative Example 4, and it was found that exclusion of sodium silicate also caused a decrease in overall strength.

Exam, Inspection unit Test, inspection method Test Flexural strength 3 days of age KSF 4042 7.6 7 days of age 8.7 28 days of age 9.4 Compressive strength 3 days of age 27.2 7 days of age 47.5 28 days of age 50.9 Bond strength 28 days of age 1.9 Length change rate 28 days of age -0.047

As shown in Table 9, Comparative Example 5 prepared a filler by combining the components except naphthalene, polyacrylamide, the result is that the fluidity of the filler is significantly lowered without adding naphthalene, the filler between the existing tube and the lining tube It was found that the workability was inferior due to the difficulty of filling, and the exclusion of polyacrylamide also caused a decrease in overall strength.

All simple modifications or changes of the present invention can be easily carried out by those skilled in the art, and all such modifications or changes can be seen to be included in the scope of the present invention.

Claims (9)

Filler for lining agent containing cement, silica sand, CSA, metakaolin, naphthalene, polyacrylamide, sodium silicate, alkali metal silicate. The method of claim 1, wherein the filler is 47 to 72% by weight of cement; 20-50% by weight of silica sand; CSA 1-3 wt%; 0.7-1.7 weight percent metakaolin; Naphthalene 0.1-1.5 wt%; 0.1% to 0.6% polyacrylamide; 0.3-1.5 wt% sodium silicate; And Filling material for the reinforcing line lining pipeline containing 0.1 to 1.4% by weight alkali metal silicate. According to claim 1, The cement is a filler for the lining pipeline repair reinforcement method consisting of three kinds of crude steel cement and alumina cement. The filler of claim 3, wherein the cement has a weight ratio of three kinds of crude steel cement to alumina cement of 34 to 49: 13 to 23. The filling material for repairing a lining pipeline according to claim 1, wherein the silica sand comprises a first silica sand having a diameter of 0.85 to 1.2 mm and a second silica sand having a diameter of 0.6 to 0.85 mm. The filler of claim 5, wherein the silica sand has a weight ratio of 13 to 23: 7 to 27 of the first silica sand to the second silica sand. Lining material comprising the filler according to any one of claims 1 to 6. delete Lining pipeline repair and reinforcement method using the lining material according to claim 7.