KR102032966B1 - Liquidity lightweight filler composition used by waste for sewer pipe and making method thereof - Google Patents

Abstract

The present invention comprises 0.5 to 25 parts by weight of an alkali activator, 100 to 750 parts by weight of soil for filler, 0.5 to 1.5 parts by weight of admixture, and 95 to 115 parts by weight of mixed water based on 100 parts by weight of industrial byproduct binder. The industrial by-product binder is characterized in that it comprises a slag powder which is a by-product of the steel industry, a paper sludge powder which is a by-product of the paper industry, and a cement kiln dust which is a by-product of both industries.

Description

Filler composition for flowable lightweight sewage pipe using waste and its manufacturing method {LIQUIDITY LIGHTWEIGHT FILLER COMPOSITION USED BY WASTE FOR SEWER PIPE AND MAKING METHOD THEREOF}

The present invention relates to a filling material composition for a light weight sewage pipe using waste and a method for manufacturing the same, and more particularly, to improve the fluidity of the filling material placed around the sewage pipe during the establishment and repair of the sewage pipe, and the earth pressure and the pressure applied to the sewage pipe. Since the buoyancy is reduced, the filling process and the flattening process of the filling material can be easily performed, and the cost for manufacturing the filling material can be reduced, and the flowable lightweight sewage filling material composition utilizing the waste that can recycle the industrial waste and its manufacture It is about a method.

According to the sewage statistics of the Ministry of Environment, the extension of installation of sewage pipes by year is increasing every year, and the amount of filling material construction is expected to increase gradually in proportion to the installation of sewage pipes.

In addition, most of the ground depressions that have recently occurred in various places in Korea and become a major social issue are artificial ground depressions. Artificial ground depressions are usually caused by leaks due to the aging of underground burial pipes such as sewers, waterworks, power stations, and communication stations. It is known to occur due to underground cavities due to the inflow of groundwater due to the selection of inappropriate construction methods or poor management of underground structures.

According to the Seoul report, about 85% of the ground accidents are reported to be ground depressions caused by leaks from sewer pipe damage, and the damage of underground buried pipes is closely related to the frequency of ground depressions. It is becoming. Since the damage of underground buried pipes causes ground depression, it is very important to select the proper pipe type for the purpose of use and the location of installation after understanding the characteristics of the pipe types.

Sewage pipes are mainly used for concrete pipes (fume pipes, VR pipes, PC pipes, etc.). If the upper part of the sewer pipe is damaged, the groundwater or groundwater flows into the pipe along with the soil.

The underground cavity created by the continuous soil loss extends to the upper part, and the cavity sinks due to the upper damage of the underground buried pipe.

Inadvertent construction and damage of underground burial pipes, including sewer pipes, are the most common cause of carelessness. Carelessness in construction is caused by various problems such as poor connection of buried pipe joints and damages due to other constructions, and it is reported that one of the biggest factors is lack of compaction of the filling material and deterioration of the seal.

Currently, the backfilling work for sewage pipes is mostly applied to the compaction method using sand or earth and sand, but in the case of urban sewage pipes, they are buried in narrow spaces and obstacles in residential areas. Due to the various obstacles adjacent to each other, it is impossible to effectively compact the machine, and due to the influence of the adjacent ground and the structure, the compaction efficiency is greatly reduced, causing sedimentation of the buried sewer pipe ground, loss of filler material due to sewage outflow due to the pipe damage, and the like. It is the main cause of road depression caused by the causes.

Therefore, in order to solve the problem of the compaction method using the existing soil and sand, the technology development and commercialization of the Controlled Low Strength Material (CLSM) composed of cement, soil, and water have been actively progressed. The case is relatively low.

In the case of liquid filling materials for underground buried pipes, such as sewage pipes, a lightweight technology to reduce earth pressure on buried pipes and a buoyancy applied to pipes and a production that can secure economic feasibility by actively utilizing industrial by-products and wastes in the filling material manufacturing. Technology development is urgently needed.

In order to solve the above problems, a light weight soil material for sinkhole prevention has been developed, and the landfill material according to the prior art relates to a light weight soil material for sinkhole prevention for backfilling underground structures buried in the ground, and the landfill material is a binder, water and recycled soil. It comprises a, the binder is composed of 20 to 30% by weight cement, 10 to 20% by weight fly ash and 50 to 70% by weight of blast furnace slag, the unit binding amount, the unit amount and the unit recycled soil amount in a specific equation Is determined by

Background art of the present invention is disclosed in Republic of Korea Patent Publication No. 10-1583257 (January 12, 2016, the name of the invention: lightweight fill material for preventing sinkholes).

Filling material according to the prior art, when the strength of the backfill material is poured around the sewer pipe is increased, the earth pressure applied to the sewage pipe is increased, there is a problem that the breakage of the sewer pipe may occur, the lowering of the fill material to reduce the earth pressure applied to the sewer pipe In the case of improving the fluidity, the buoyancy of the filler is increased, so that the sewage pipe is floated to the upper portion of the filler so that it is difficult to install at the correct position.

Therefore, there is a need for improvement.

The present invention improves the fluidity of the filling material that is poured around the sewage pipe during the establishment and repair of the sewage pipe, and reduces the earth pressure and buoyancy applied to the sewage pipe, so that the filling material and the flattening process of the filling material can be easily performed, It is an object of the present invention to provide a flowable lightweight sewage filler composition and a method of manufacturing the same, which can reduce costs and utilize wastes capable of recycling industrial wastes.

The present invention comprises 0.5 to 25 parts by weight of an alkali activator, 100 to 750 parts by weight of soil for filler, 0.5 to 1.5 parts by weight of admixture, and 95 to 115 parts by weight of mixed water based on 100 parts by weight of industrial byproduct binder. The industrial by-product binder is characterized in that it comprises a slag powder which is a by-product of the steel industry, a paper sludge powder which is a by-product of the paper industry, and a cement kiln dust which is a by-product of both industries.

In addition, the industrial by-product binder of the present invention is characterized in that it comprises 50 to 200 parts by weight of paper sludge powder and 5 to 250 parts by weight of cement kiln dust based on 100 parts by weight of the slag powder.

In addition, the alkali activator of the present invention is characterized in that it is made by mixing 300 to 700 parts by weight of sodium silicate with respect to 100 parts by weight of sodium hydroxide (Sodium hydroxide).

In addition, the soil for the filler material of the present invention is characterized in that the mixture of 5 to 15 parts by weight of the lightweight solid material with respect to 100 parts by weight of the site waste residue.

In addition, the admixture of the present invention is characterized by mixing any one or two or more of an AE agent, a lignin-based admixture, a naphthalene-based admixture, a polycarboxylic acid-based admixture.

In addition, the present invention, (a) immersing the soil for the filler in water for 6 to 48 hours; (b) adding a by-product binder, mixed water, and admixture to a mixer and mixing to prepare a paste; And (c) characterized in that it comprises the step of mixing the on-site waste residue and the filler soil into the paste.

Filler composition for flowable lightweight sewage pipes utilizing the waste according to the present invention and a method for producing the same include an industrial by-product binder and an alkali activator, so that a filler material having high fluidity can be produced, and when the filler is poured around the sewer pipe, Filler is easily penetrated by the gap between the ground and the ground, there is an advantage that the flattening process is easy after the filling process is completed.

In addition, the filling material composition for flowable lightweight sewage pipes utilizing the waste according to the present invention and a method for producing the same, the industrial by-product binder consisting of slag powder, paper sludge powder and cement kiln dust to manufacture the filler material is not easy to dispose of the industry By-products can be recycled to prevent environmental pollution, to reduce the time and cost required for industrial by-products treatment, and to reduce the cost of manufacturing the filling material.

1 is a photograph showing the fluidity test of the filling material composition for flowable lightweight sewer pipe using waste according to an embodiment of the present invention.
Figure 2 is a photograph showing a test piece and a uniaxial compressive strength test of the fluid composition for filling lightweight sewage pipes utilizing waste according to an embodiment of the present invention.
3 is a cross-sectional view showing the construction state of the filling material composition for flowable lightweight sewer pipe using waste according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of a flowable lightweight sewage filler material composition and its manufacturing method utilizing waste according to the present invention.

In this process, the thickness of the lines or the size of the components shown in the drawings may be exaggerated for clarity and convenience of description.

In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to a user's or operator's intention or custom.

Therefore, the definitions of these terms should be made based on the contents throughout the specification.

1 is a photograph showing the fluidity test of the flowable lightweight sewage filling material composition utilizing waste according to an embodiment of the present invention, Figure 2 is a flowable lightweight sewage filling material utilizing waste according to an embodiment of the present invention. The test piece and uniaxial compressive strength test of the composition is a photograph is shown, Figure 3 is a cross-sectional view showing the construction state of the filling material composition for flowable sewage pipes utilizing waste according to an embodiment of the present invention.

1 to 3, the filling material composition for flowable lightweight sewage pipes using waste according to an embodiment of the present invention, 0.5 to 25 parts by weight of alkali activator and 100% by weight of industrial byproduct binder, It consists of 100-750 weight part, 0.5-1.5 weight part of admixtures, and 95-115 weight part of mixed water.

Therefore, the filling material 40 according to the present embodiment can reduce the time and cost required to dispose of industrial by-products and at the same time reduce the cost required to manufacture the filling material 40, and the fluidity is increased so that the sewage pipe ( The effect of reducing the earth pressure and buoyancy applied to 30 is shown.

The industrial by-product binder of the present embodiment includes slag powder, which is a by-product of the steel industry, paper sludge powder, which is a by-product of the paper industry, and cement kiln dust, which is a by-product of the ash industry. The manufacturing 40 can effectively reduce the time and cost required for the disposal of industrial by-products.

In addition, the industrial by-product binder of the present embodiment comprises 50 to 200 parts by weight of paper sludge powder and 5 to 250 parts by weight of cement kiln dust based on 100 parts by weight of slag powder.

Since the alkali activator of the present embodiment is made by mixing 300 to 700 parts by weight of sodium silicate with respect to 100 parts by weight of sodium hydroxide, it is possible to secure reactivity and early strength through alkali activation of an industrial byproduct binder. Will be.

In addition, the soil for the filling material of the present embodiment is made by mixing 5 to 15 parts by weight of lightweight solid material with respect to 100 parts by weight of site waste residue, and the site waste residue is ground for the installation of underground buried pipes such as sewage pipe 30 ( 10) by drilling the excavation groove 20 when construction means the soil generated at this time, the lightweight solid material is made of a lightweight organic solid material or a lightweight inorganic solid material.

Here, the light-weight organic material is a solid phase particle size of 2 ~ 10mm and a density of 1.08 ~ 1.22g / waste tire scraps of cm ^3, density 0.20 ~ 0.35g / cm ³ of EPS (Expanded Polystylene) beads, 0.15 ~ 0.30 g / cm ³ At least one selected from waste polyurethanes of is used.

Lightweight inorganic solid materials are selected from vermiculite having a particle size of 2 ~ 13mm, density 0.75 ~ 1.05g / cm ³ , dry bottom ash with 15 ~ 35% absorption, density 0.85 ~ 1.10 g / cm ³ , and water absorption 20 ~ 55%. Use at least one to ensure the lightness of the mixture.

In addition, the admixture of the present embodiment is made by mixing any one or two or more of the AE agent, lignin-based admixture, naphthalene-based admixture, polycarboxylic acid-based admixture, so as to secure the workability of the filler 40, light weight through securing fine entrained air and Durability can be improved.

In addition, as the mixed water of the present embodiment, those which do not adversely affect the physical properties of the filler 40 such as general water supply and groundwater are used.

Looking at the manufacturing method of the filling material composition for flowable lightweight sewer pipe using waste according to an embodiment of the present invention configured as described above are as follows.

Method for producing a flowable lightweight sewage filling material composition using waste according to an embodiment of the present invention, the step of immersing the filling material soil in water for 6 to 48 hours, industrial by-product binder, mixed water and admixture in the mixer The method includes the steps of preparing a paste by adding and mixing the mixture, and adding and mixing on-site waste residue and soil for the filling material into the paste.

The step of immersing the filling material soil of the present embodiment is made to prevent the loss of fluidity of the filling material 40 by absorbing the mixed water when the dry bottom ash and the high function of the vermiculite are introduced into the dry state. .

In addition, the step of immersing the filling material soil of the present embodiment is carried out by performing a pre-wetting of the lightweight inorganic solid material having a high functional properties of the filling material soil, the light inorganic solid material in water for 6 to 48 hours By soaking during

Paste manufacturing step of the present embodiment, the mixing step using a forced or twin shaft type mixer, the rotation speed is 15 ~ 80RPM to ensure the binder dispersibility and the reactivity of the admixture, mixing at least 90 seconds It is characterized by.

In addition, the step of mixing the soil for the filler in the paste of the present embodiment, to ensure the homogeneity of the fluidized filler 40 is made by mixing at least 180 seconds at a speed of 20 ~ 95 RPM by using a mixer of the forced or twin shaft type. do.

In the case of constructing the filling material 40 manufactured as described above, the excavation groove 20 is constructed while excavating the ground 10 to generate on-site waste residue, and the sewer pipe 30 is seated in the excavation groove 20. After the filling material 40 is poured into the excavation groove 20.

Filler 40 according to the present embodiment, the fluidity is high, light, the buoyancy is relatively small, so that the filling material 40 is infiltrated at the interval between the bottom surface of the excavation groove 20 and the sewer pipe 30, the basic filling A portion 43 is formed between the outer wall of the sewage pipe 30 and the inclined surface of the excavation groove 20 to form a back filling portion 42, and the upper portion of the excavation groove 20 to cover the upper portion of the sewage pipe 30. Filled to form the upper filling portion (41).

As described above, the filling material 40 of the present embodiment is filled in the excavation groove 20 so as to surround the sewage pipe 30 seated in the excavation groove 20 to prevent damage of the sewer pipe 30 and at the same time the sewer pipe 30. It is possible to prevent the surrounding ground 10 from sinking.

Example 1

15 parts by weight of alkali activator, 1.0 parts by weight of admixture, 105 parts by weight of mixed water, and 550 parts by weight of soil for filling material with respect to 100 parts by weight of industrial byproduct binder consisting of 150 parts by weight of cement kiln dust based on 100 parts by weight of slag powder. 40 is manufactured.

Soil for filling is to be mixed with 10 parts by weight of lightweight solid material with respect to 100 parts by weight of site waste residue.

Example 2

15 parts by weight of alkali activator, 1.0 parts by weight of admixture, 105 parts by weight of mixed water, and 550 parts by weight of soil for filling material with respect to 100 parts by weight of industrial byproduct binder consisting of 150 parts by weight of cement kiln dust based on 100 parts by weight of slag powder. 40 is manufactured.

Soil for filling material shall be mixed with 25 parts by weight of lightweight solid material with respect to 100 parts by weight of site waste residue.

Example 3

15 parts by weight of alkali activator, 1.0 parts by weight of admixture, 105 parts by weight of mixed water, and 550 parts by weight of soil for filling material with respect to 100 parts by weight of industrial byproduct binder consisting of 150 parts by weight of cement kiln dust based on 100 parts by weight of slag powder. 40 is manufactured.

Soil for filling is to be mixed with 50 parts by weight of lightweight solid material with respect to 100 parts by weight of site waste residue.

Comparative Example 1

0.4 parts by weight of alkali activator, 1.0 parts by weight of admixture, 105 parts by weight of mixed water, and 550 parts by weight of soil for filler, based on 100 parts by weight of industrial byproduct binder consisting of 150 parts by weight of cement kiln dust, based on 100 parts by weight of slag powder. 40 is manufactured.

Soil for filling is to be mixed with 60 parts by weight of lightweight solid material with respect to 100 parts by weight of site waste residue.

Comparative Example 2

30 parts by weight of alkali activator, 1.0 parts by weight of admixture, 105 parts by weight of mixed water, and 550 parts by weight of soil for filling material are mixed with 100 parts by weight of industrial byproduct binder consisting of 150 parts by weight of cement kiln dust based on 100 parts by weight of slag powder. 40 is manufactured.

Soil for filling is to be mixed with 5 parts by weight of lightweight solid material with respect to 100 parts by weight of site waste residue.

In addition, the mixing method of the filler 40 according to the present embodiment is 12 hours pre-wetting of the inorganic solid material having a high water content characteristics of the first stage filler material, "two-stage industrial by-product binder, mixed water, admixture Was added to a twin shaft mixer to perform a first mixing for 120 seconds at a rotational speed of 50 RPM to prepare a paste having high fluidity, and to add waste residue and inorganic solid or organic solid to the second stage mixture. The final mixture was mixed for 210 seconds at 55 RPM using a twin shaft mixer.

The test for the performance evaluation of the filler 40 of the present embodiment performs the uniaxial compressive strength and flow test and unit volume mass for each age.

The uniaxial compressive strength test produces a cylindrical specimen with a ratio of diameter 2: 1 and measures the uniaxial compressive strength at 7 and 28 days of age.The flow test for fluidity evaluation is a 80 mm * 80 mm diameter cylinder. After the material is introduced into the tube, the tube is pulled up and the diameter of the sample flowing is measured and evaluated.

And the unit volume mass is calculated by measuring the volume and mass of the test piece prepared for testing the uniaxial compressive strength.

Filler 40 of the present invention has a fluidity of 200 ~ 250mm to ensure compactness and fillability, uniaxial compressive strength is 7 days uniaxial compressive strength of 0.3MPa or more for early opening of traffic or early progress of subsequent processes The 28-day uniaxial compressive strength is required to be below 1.4MPa for re-excavation to repair in case of defects.

division Uniaxial Compressive Strength (MPa) Flow value (mm) Unit volume mass
(kg / m ³ ) 7 days 28 days Example 1 0.63 1.38 233 1789 Example 2 0.52 1.21 242 1711 Example 3 0.36 0.94 249 1543 Comparative Example 1 0.21 0.79 327
(Material separation) 1499 Comparative Example 2 1.74 3.01 164
(Decrease in workability) 1856

In addition, in order to secure the light weight of the filler 40, a unit volume mass should secure a performance of 1800 kg / m ³ or less.

Evaluation results for Examples and Comparative Examples In Examples 1 to 3, fluidity for securing compaction and filling, age 7-day uniaxial compressive strength for traffic opening, age 28-day uniaxial compressive strength for re-excavation It has been shown to satisfy the performance as the fluidization filler 40 by satisfying the.

However, in the case of Comparative Example 1, the light weight can be secured due to the use of an insufficient alkali activator and the use of excessively light solid materials. In addition, the initial uniaxial compressive strength for opening the traffic was not found.

In addition, in the case of Comparative Example 2, it was found that the use of the excessive alkali activator and the use of the excessively lightweight solid material did not meet the uniaxial compressive strength standard for re-excavation of the filler 40.

This improves the fluidity of the filling material that is placed around the sewage pipe when the sewage pipe is newly installed and repaired, and reduces the earth pressure and buoyancy applied to the sewage pipe, so that the filling and flattening process of the filling material can be easily performed, and the cost required for manufacturing the filling material. It is possible to provide a flowable lightweight sewage filler composition and a method of manufacturing the same, which can reduce the cost and utilize wastes capable of recycling industrial wastes.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and various modifications and equivalent other embodiments are possible to those skilled in the art. Will understand.

In addition, the flowable lightweight sewage pipe filling material composition using waste and its manufacturing method have been described as an example, but this is merely exemplary, the present invention also to other products other than the flowable lightweight sewage filling material composition using the waste and a method for producing the same. Filler composition and its preparation method can be used.

Therefore, the true technical protection scope of the present invention will be defined by the claims below.

10: ground 20: excavation groove
30: sewer pipe 40: filling material
41: top filling portion 42: back filling portion
43: basic filling unit

Claims (6)

0.5 to 25 parts by weight of alkali activator, 100 to 750 parts by weight of soil for filler, 0.5 to 1.5 parts by weight of admixture, and 95 to 115 parts by weight of mixed water, based on 100 parts by weight of industrial byproduct binder,
The industrial by-product binder includes slag powder, which is a by-product of the steel industry, paper sludge powder, which is a by-product of the paper industry, and cement kiln dust, a by-product of both industries.
The soil for the filler is made by mixing 5 to 15 parts by weight of the lightweight solid material with respect to 100 parts by weight of site waste residue,
The site waste residue refers to soil generated at this time when excavation grooves are constructed by excavating the ground for the installation of the underground buried pipe, and the lightweight solid material is made of a lightweight organic solid material or a lightweight inorganic solid material.
The light-weight organic material is a solid phase of particle size of 2 ~ 10mm and a density of 1.08 ~ 1.22g / cm ³ of the waste tire scraps, density 0.20 ~ 0.35g / cm ³ of EPS (Expanded Polystylene) beads, 0.15 ~ 0.30 g / cm ³ It consists of one or more selected from waste polyurethane,
The lightweight inorganic solid material is a dry bottom ash having a particle size of 2 to 13 mm, a density of 0.75 to 1.05 g / cm ³ , and an absorption rate of 15 to 35%, a density of 0.85 to 1.10 g / cm ³ , and an absorption rate of 20 to 55%. It is made of one or more selected from,
The industrial by-product binder is made of 50 to 200 parts by weight of paper sludge powder and 5 to 250 parts by weight of cimet kiln dust based on 100 parts by weight of the slag powder,
The alkali activator is made by mixing 300 to 700 parts by weight of sodium silicate with respect to 100 parts by weight of sodium hydroxide,
The admixture is made by mixing any one or two or more of an AE agent, a lignin-based admixture, a naphthalene-based admixture, a polycarboxylic acid-based admixture,
20-95 RPM using a forced or twin shaft type mixer to ensure homogeneity of the fluidized filler when mixing the filler material soil with a paste comprising the industrial by-product binder, the alkali activator, the admixture, and the mixed water. Filler composition for flowable lightweight sewage pipes utilizing the waste, characterized in that the mixture is made at least 180 seconds at a speed of.
delete delete delete delete (a) immersing the filler soil in water for 6-48 hours;
(b) adding a by-product binder, mixed water, and admixture to a mixer and mixing to prepare a paste; And
(c) mixing on-site waste residue and the filler soil into the paste;
In the step (b), 0.5 to 25 parts by weight of an alkali activator, 100 to 750 parts by weight of soil for filler, 0.5 to 1.5 parts by weight of admixture, and 95 to 115 parts by weight of mixed water with respect to 100 parts by weight of industrial byproduct binder. Made by preparing a paste containing,
The industrial by-product binder includes slag powder, which is a by-product of the steel industry, paper sludge powder, which is a by-product of the paper industry, and cement kiln dust, a by-product of both industries.
The soil for the filler in step (a) is made by mixing 5 to 15 parts by weight of the lightweight solid material with respect to 100 parts by weight of the site waste residue,
The site waste residue refers to soil generated at this time when excavation grooves are constructed by excavating the ground for the installation of the underground buried pipe, and the lightweight solid material is made of a lightweight organic solid material or a lightweight inorganic solid material,
The light-weight organic material is a solid phase of particle size of 2 ~ 10mm and a density of 1.08 ~ 1.22g / cm ³ of the waste tire scraps, density 0.20 ~ 0.35g / cm ³ of EPS (Expanded Polystylene) beads, 0.15 ~ 0.30 g / cm ³ It consists of one or more selected from waste polyurethane,
The lightweight inorganic solid material is a dry bottom ash having a particle size of 2 to 13 mm, a density of 0.75 to 1.05 g / cm ³ , and an absorption rate of 15 to 35%, a density of 0.85 to 1.10 g / cm ³ , and an absorption rate of 20 to 55%. Consisting of one or more selected from,
Step (c) is a forced or twin shaft type to ensure homogeneity of the fluidized filler when mixing the filler material soil with the paste comprising the industrial by-product binder, the alkali activator, the admixture, and the mixed water. Method for producing a filling material composition for flowable lightweight sewage pipes utilizing the waste, characterized in that the mixture is made 180 seconds or more at a speed of 20 ~ 95RPM by using a mixer.

Images