KR102398290B1 - Concrete Wall Block Composition using Recycled Aggregate and Manufacturing Method of Concrete Wall Block using the same - Google Patents

Abstract

The present invention relates to a concrete wall block composition using recycled aggregate, and a concrete wall block manufacturing method using the same. According to the present invention, the concrete wall block composition comprises, with respect to 100 parts by weight of recycled aggregate, 20 to 30 parts by weight of cement, 10 to 20 parts by weight of water, and 1 to 2 parts by weight of an admixture. Accordingly, the composition provides advantages of satisfying quality standards of aggregate for concrete even if recycled aggregate is used regardless of particle size, eliminating the hassle of using the right ratio of coarse aggregate and fine aggregate as in the case of conventional aggregate for concrete, and manufacturing concrete walls by using recycled aggregate of 1 to 20 mm as a raw material without separate mixing.

Description

TECHNICAL FIELD [0002] Concrete Wall Block Composition using Recycled Aggregate and Manufacturing Method of Concrete Wall Block using the same}

The present invention relates to a concrete retaining wall block composition using recycled aggregate and a method for manufacturing a concrete retaining wall block using recycled aggregate, and more particularly, to satisfy the quality standards of aggregate for concrete even if recycled aggregate is used without dividing by particle size. It relates to a concrete retaining wall block composition using recycled aggregate and a method for manufacturing a concrete retaining wall block using recycled aggregate, which can improve mechanical strength despite recycling construction waste as aggregate.

In general, in civil engineering or construction sites, when the soil is filled at a certain height or when a part of the site is cut, a slope is formed. .

Various methods have been proposed for reinforcing the incision and slope formed by such embankment or incision. In particular, construction structures and methods in consideration of external aesthetics as well as safety and economy are required for the embankment.

In general, as for reinforcing such cut surfaces and inclined surfaces, retaining wall blocks are often used.

Conventional retaining wall blocks are mostly concrete blocks composed of a composition mixed with sand, aggregate, and cement, and are manufactured in a way that the composition mixed with sand, aggregate, and cement is put into a mold of a molding machine and cured after vibration and compression molding. .

At this time, aggregates are sometimes used instead of recycled aggregates produced by crushing construction waste, but it is pointed out as a disadvantage of weak durability due to particle size or strength problems.

In addition, the conventional retaining wall block has a problem in that the durability is shortened, such as the resistance is lowered by the external environment.

Republic of Korea Patent Publication No. 10-1677745 (2016.11.21.) discloses a method for manufacturing a concrete retaining wall block using recycled aggregate.

The concrete retaining wall block manufacturing method using the recycled aggregate has the advantage of increasing the resource utilization by using the recycled aggregate, but it should be divided into recycled aggregate with a particle size of 10 to 25 mm and recycled aggregate with a particle size of 25 to 40 mm. Therefore, there is a disadvantage in that the process becomes complicated.

KR 10-1677745 B1 2016.11.21.

An object of the present invention is to provide a concrete retaining wall block composition using recycled aggregate and a method for manufacturing a concrete retaining wall block using recycled aggregate, which can satisfy the quality standards of concrete aggregate even when recycled aggregate is used without dividing by particle size. will be.

Another object of the present invention is to provide a concrete retaining wall block composition using recycled aggregate and a method for manufacturing a concrete retaining wall block using recycled aggregate, which can improve mechanical strength despite recycling construction waste as aggregate.

In order to achieve the above object, the present invention provides the following means.

The present invention includes 20 to 30 parts by weight of cement, 10 to 20 parts by weight of water, and 1 to 2 parts by weight of an admixture to 100 parts by weight of recycled aggregate,

The recycled aggregate first removes the soil and clay lumps that are mixed with the concrete lump using a 100 mm mesh bag on the excavator, and the concrete lump from which the soil and clay lumps are removed is a jaw crusher First crushing using The removed concrete mass is secondarily crushed using a 25 mm crusher, the second crushed concrete mass is third crushed using a cone crusher, and a vibrating screen is used from the third crushed concrete mass To provide a concrete retaining wall block composition using recycled aggregate that selects recycled aggregate of 1 to 20 mm.

1 to 3 parts by weight of an antibacterial effect enhancing agent is additionally included in 100 parts by weight of the recycled aggregate, wherein the antibacterial effect improving agent is 30-40 wt% zeolite, 20-30 wt% bentonite, 10-20 wt% zinc oxide, 10 wt% sodium hydroxide 20% by weight, magnesium silicofluoride (MgSiF ₆ ) 10 to 20% by weight, tungsten 1 to 5% by weight and sulfur powder 0.1 to 1% by weight.

1 to 3 parts by weight of a durability improver is additionally included in 100 parts by weight of the recycled aggregate, wherein the durability improving agent is 30-40 wt% of an epoxy resin, 20-30 wt% of butyl acrylate, 10-20 wt% of silicon dioxide, 10 wt% of aluminum nitride -20 wt%, barium sulfate 10-20 wt% and fucoidan fermented solution 1-5 wt%, the fermented fucoidan, immersing fucoidan in aronia vinegar at 20-30° C. for 5-10 minutes; steaming the fucoidan immersed in the aronia vinegar at 110-120° C. for 20-30 minutes; obtaining a fucoidan extract by adding 500 to 600 parts by weight of purified water to 100 parts by weight of the steamed fucoidan and heating at 120 to 130° C. for 1 to 2 hours; adding 1 part by weight of fluranase to 100 parts by weight of the fucoidan extract and enzymatic treatment at 45° C. for 3 hours; and 1 to 5 parts by weight of aronia fermented solution and 1 to 5 parts by weight of blueberry fermented solution to 100 parts by weight of the enzyme-treated fucoidan extract, fermented at 25 to 30° C. for 60 to 62 days, and filtered to obtain a fermented fucoidan solution. ; Using the one prepared including, the aronia vinegar, immersing aronia in purified water at 20 ~ 30 ℃ for 1 ~ 2 minutes; adding 30 to 40 parts by weight of the immersed aronia to 100 parts by weight of the brown rice extract, heating at 95 to 105° C. for 50 to 60 minutes, and then filtering to obtain an aronia extract; adding 3 to 4 parts by weight of a liquefied enzyme to 100 parts by weight of the aronia extract and liquefying it at 60° C. for 20 to 30 minutes; adding 3 to 4 parts by weight of a saccharifying enzyme to 100 parts by weight of the liquefied aronia extract and saccharifying at 60° C. for 50 to 60 minutes; adding 1 to 3 parts by weight of yeast to 100 parts by weight of the saccharified aronia extract and performing alcohol fermentation at 30 to 35° C. for 3 to 4 days to obtain an alcoholic fermentation; adding 1-5 parts by weight of acetic acid bacteria to 100 parts by weight of the alcoholic fermentation broth and acetic acid fermentation at 30-35° C. for 10-13 days to prepare an acetic acid fermentation broth; and aging the acetic acid fermented liquid at 10 to 20° C. for 10 to 30 days; Using a product prepared including The aronia fermented broth is prepared by heating for 20 to 30 minutes in Fermented for 30 to 32 days at ℃ is used, and the blueberry fermented solution is obtained by adding 1 to 5 parts by weight of yeast to 100 parts by weight of blueberry juice and fermenting at 20 to 25℃ for 48 to 50 hours.

In addition, the present invention, the construction waste using an excavator with a 100 mm mesh bag to first remove the soil and clay mass mixed with the concrete mass (step 1); first crushing the concrete lump from which the soil and clay lumps have been removed using a jaw crusher (step 2); Secondary separation of soil using a tromwell screen from the first crushed concrete mass (step 3); removing foreign substances from the concrete mass from which the soil is separated using a conveyor belt (step 4); Secondary crushing of the concrete mass from which the foreign matter has been removed using a 25 mm crusher (step 5); third crushing the second crushed concrete mass using a cone crusher (step 6); selecting the recycled aggregate of 1 to 20 mm from the tertiary crushed concrete mass using a vibrating screen (step 7); Preparing a concrete retaining wall block composition using recycled aggregate including 20 to 30 parts by weight of cement, 10 to 20 parts by weight of water, and 1 to 2 parts by weight of an admixture to 100 parts by weight of the recycled aggregate (step 8); pouring the concrete retaining wall block composition using the recycled aggregate into a mold (step 9); and manufacturing a retaining wall block by curing the large crete retaining wall block composition using the recycled aggregate (step 10); It provides a method for manufacturing a concrete retaining wall block using recycled aggregate, including a.

The concrete retaining wall block composition using the recycled aggregate of the present invention has an advantage in that it can satisfy the quality standards of aggregate for concrete even if the recycled aggregate is used without classifying the particle size.

The concrete retaining wall block composition using recycled aggregate of the present invention is characterized by eliminating the hassle of using the ratio of coarse and fine aggregates by matching the ratio of coarse aggregates and fine aggregates, as in the case of conventional concrete aggregates, and produces recycled aggregates of 1 to 20 mm without separate mixing. It has the advantage of being able to produce concrete retaining walls with raw materials as they are.

1 to 8 are photographs illustrating the steps of manufacturing the recycled aggregate according to the present invention.
9 to 11 show the results of sieving (grain size), density, water absorption, stability, 0.08 mm sieve passing amount, clay mass, and particle shape determination results by requesting the recycled aggregate prepared in Example 1 to the Korea Construction Quality Research Institute. This is the data that measured the rate, alkali latent reaction, and the content of foreign substances.
12 is a photograph of a concrete retaining wall block obtained by steam curing the concrete retaining wall block composition using the recycled aggregate prepared in Example 2.

Hereinafter, the present invention will be described in detail.

Conventionally, the concrete retaining wall block composition using recycled aggregate,

Use a mixture of recycled coarse aggregate, recycled fine aggregate, cement, water and admixture.

In the case of gravel, which is a recycled coarse aggregate, the sieved particle size is within the normal range, but in the case of recycled fine aggregate, the sieved particle size does not fall within the normal range, so there is a difficulty in using sand and stone powder after adjusting the proportions.

The present invention has the advantage of simplifying the process because it can satisfy the quality standards of aggregate for concrete without distinguishing between recycled coarse aggregate and recycled fine aggregate.

First, a concrete retaining wall block composition using recycled aggregate according to the present invention will be described.

The concrete retaining wall block composition using the recycled aggregate of the present invention,

It contains 20-30 parts by weight of cement, 10-20 parts by weight of water, and 1-2 parts by weight of an admixture in 100 parts by weight of recycled aggregate.

It is preferable to use the recycled aggregate after separating only the concrete lump from the construction waste and crushing it to 1 to 20 mm.

When the concrete mass is crushed to less than 1 mm, there is a problem in that the strength is reduced, and when crushed to more than 20 mm, there is a problem in that the voids in the goncrete become large and cracks occur.

In the present invention, the recycled aggregate first removes the soil and clay lumps mixed with the concrete lump using a 100 mm mesh bag of construction waste in an excavator, and the concrete lump from which the soil and clay lumps are removed is subjected to a jaw crusher (jaw). crusher), secondary separation of soil from the first crushed concrete mass using a tromwell screen, and a conveyor belt from the separated concrete mass to remove foreign substances, and Secondary crushing of the concrete block from which foreign substances have been removed using a 25mm crusher, the third crushing of the second crushed concrete block using a cone crusher, and a vibrating screen from the tertiary crushed concrete block It is manufactured by sorting recycled aggregates of 1 to 20 mm using

The characteristics of recycled aggregate produced by completely removing the soil and clay lumps are that the original shape of general gravel is preserved and only the concrete lump is crushed.

The separated 1~20mm recycled aggregate is in a state where the ratio of coarse aggregate to fine aggregate is uniformly adjusted during the initial production of ready-mixed concrete. As coarse and fine aggregates are mixed in the same way as city raw materials, it has the advantage of being able to meet the optimum particle size standard without a separate mixing operation.

The present invention does not distinguish between recycled coarse aggregates and recycled fine aggregates, and can satisfy the quality standards for concrete aggregates even using recycled aggregates of 1 to 20 mm, so the process can be simplified.

The recycled aggregate of the present invention satisfies the standard values of particle size, water absorption rate, stability, 0.08 mm sieve passing rate, clay mass, particle shape determination performance rate, alkali potential reaction and foreign material content, which are the quality standards for concrete aggregates. There is this.

The present invention is characterized by eliminating the hassle of using the ratio of coarse and fine aggregates to match the ratio of coarse aggregates and fine aggregates as in the case of conventional aggregates for concrete. Retaining wall production is possible.

As the cement, at least one selected from the group consisting of portland cement, blast furnace slag cement, and alumina cement may be used.

It is preferable that 20-30 parts by weight of cement is included in 100 parts by weight of the recycled aggregate, and when less than 20 parts by weight of cement is included, there is a problem that the strength is lowered, and when it is included in more than 30 parts by weight, it is difficult to manufacture an eco-friendly concrete retaining wall block composition. there is

It is preferable that 10 to 20 parts by weight of water is included in 100 parts by weight of the recycled aggregate, and when less than 10 parts by weight of water is included, there is a problem of deterioration of workability, and when it is included in excess of 20 parts by weight, there is a problem that the compressive strength is reduced. .

The admixture imparts water-reducing effect and fluidity to the large Crete composition and serves to enhance workability, and polycarboxylic acid-based admixtures, naphthalene-based admixtures, melamine-based admixtures, aminosulfonic acid-based admixtures, lignin-based admixtures, or mixtures thereof may be used, and preferably, a polycarboxylic acid-based admixture may be used.

It is preferable that 1 to 2 parts by weight of the admixture is included in 100 parts by weight of the recycled aggregate, and when less than 1 part by weight of the admixture is included, there is a problem of deterioration of workability, and when it is included in more than 2 parts by weight, phase separation occurs in the concrete composition there is a problem.

The concrete retaining wall block composition using the recycled aggregate of the present invention,

1 to 3 parts by weight of an antibacterial effect enhancing agent may be additionally included in 100 parts by weight of the recycled aggregate.

The antibacterial effect enhancer has an advantage in that the antibacterial effect continues to appear even after a certain period of time has elapsed.

The antibacterial effect improving agent is zeolite 30-40 wt%, bentonite 20-30 wt%, zinc oxide 10-20 wt%, sodium hydroxide 10-20 wt%, magnesium silicate (MgSiF ₆ ) 10-20 wt%, tungsten 1 ~5% by weight and 0.1 to 1% by weight of sulfur powder.

The concrete retaining wall block composition using the recycled aggregate of the present invention,

1 to 3 parts by weight of a durability improving agent may be additionally included in 100 parts by weight of the recycled aggregate.

The durability improving agent has an advantage in that it can prevent deformation of the concrete retaining wall block even after a certain period of time has elapsed.

The durability improving agent is 30-40 wt% of epoxy resin, 20-30 wt% of butyl acrylate, 10-20 wt% of silicon dioxide, 10-20 wt% of aluminum nitride, 10-20 wt% of barium sulfate, and 1-5 wt% of fucoidan fermented solution % by weight.

The fucoidan is a component contained in brown algae such as seaweed, kelp, and seaweed, and is a slippery viscous polysaccharide in which a basic sugar called fucose and a sulfate group are combined.

The fucoidan fermented liquid,

immersing fucoidan in aronia vinegar at 20-30° C. for 5-10 minutes;

steaming the fucoidan immersed in the aronia vinegar at 110-120° C. for 20-30 minutes;

obtaining a fucoidan extract by adding 500 to 600 parts by weight of purified water to 100 parts by weight of the steamed fucoidan and heating at 120 to 130° C. for 1 to 2 hours;

adding 1 part by weight of fluranase to 100 parts by weight of the fucoidan extract and enzymatic treatment at 45° C. for 3 hours; and

1-5 parts by weight of aronia fermented solution and 1-5 parts by weight of blueberry fermented solution were added to 100 parts by weight of the enzyme-treated fucoidan extract, fermented at 25-30° C. for 60-62 days, and filtered to obtain a fucoidan fermented solution;

Use those manufactured including

The aronia vinegar is,

immersing aronia in purified water at 20-30° C. for 1-2 minutes;

adding 30 to 40 parts by weight of the immersed aronia to 100 parts by weight of the brown rice extract, heating at 95 to 105° C. for 50 to 60 minutes, and then filtering to obtain an aronia extract;

adding 3 to 4 parts by weight of a liquefied enzyme to 100 parts by weight of the aronia extract and liquefying it at 60° C. for 20 to 30 minutes;

adding 3 to 4 parts by weight of a saccharifying enzyme to 100 parts by weight of the liquefied aronia extract and saccharifying at 60° C. for 50 to 60 minutes;

adding 1 to 3 parts by weight of yeast to 100 parts by weight of the saccharified aronia extract and performing alcohol fermentation at 30 to 35° C. for 3 to 4 days to obtain an alcoholic fermentation;

adding 1-5 parts by weight of acetic acid bacteria to 100 parts by weight of the alcoholic fermentation broth and acetic acid fermentation at 30-35° C. for 10-13 days to prepare an acetic acid fermentation broth; and

Aging the acetic acid fermentation broth at 10-20 ° C for 10-30 days;

Use those manufactured including

The brown rice extract is prepared by adding 10-15 parts by weight of brown rice, 1-5 parts by weight of coltsfoot, 1-5 parts by weight of burdock root, and 1-5 parts by weight of Yugeun skin to 100 parts by weight of purified water and heating at 100-105° C. for 20-30 minutes. use one

As the fermented aronia, 45 to 50% by weight of aronia, 45 to 50% by weight of fructooligosaccharide, and 1 to 6% by weight of xylose are mixed, and then fermented at 20 to 25℃ for 30 to 32 days.

The blueberry fermented liquid is used in which 1 to 5 parts by weight of yeast is added to 100 parts by weight of blueberry juice and fermented at 20 to 25° C. for 48 to 50 hours.

The concrete retaining wall block composition using the recycled aggregate of the present invention has an advantage in that it can satisfy the quality standards of aggregate for concrete even if the recycled aggregate is used without classifying the particle size.

The concrete retaining wall block composition using recycled aggregate of the present invention is characterized by eliminating the hassle of using the ratio of coarse and fine aggregates by matching the ratio of coarse aggregates and fine aggregates, as in the case of conventional concrete aggregates, and produces recycled aggregates of 1 to 20 mm without separate mixing. It has the advantage of being able to produce concrete retaining walls with raw materials as they are.

Next, a method for manufacturing a concrete retaining wall block using the recycled aggregate of the present invention will be described.

The manufacturing method of the concrete retaining wall block using the recycled aggregate of the present invention,

First removing the soil and clay lumps mixed with the concrete mass by using a 100 mm mesh bag on the excavator for construction waste (step 1);

first crushing the concrete lump from which the soil and clay lumps have been removed using a jaw crusher (step 2);

Secondary separation of soil using a tromwell screen from the first crushed concrete mass (step 3);

removing foreign substances from the concrete mass from which the soil is separated using a conveyor belt (step 4);

Secondary crushing of the concrete mass from which the foreign matter has been removed using a 25 mm crusher (step 5);

third crushing the second crushed concrete mass using a cone crusher (step 6);

selecting the recycled aggregate of 1 to 20 mm from the tertiary crushed concrete mass using a vibrating screen (step 7);

Preparing a concrete retaining wall block composition using recycled aggregate including 20 to 30 parts by weight of cement, 10 to 20 parts by weight of water, and 1 to 2 parts by weight of an admixture to 100 parts by weight of the recycled aggregate (step 8);

pouring the concrete retaining wall block composition using the recycled aggregate into a mold (step 9); and

manufacturing a retaining wall block by curing the large crete retaining wall block composition using the recycled aggregate (step 10);

includes

In step 2, the jaw crusher is a machine used for primary rough crushing of raw stones to a size of 200 to 350 mm, and mainly crushes them using a compressive force. In such a jaw crusher, if a rock of several centimeters to about 1 m is inserted between the jaws, which are steel plates made of steel on both sides, when it is bitten, one of the two sides is fixed and the other moves, and the pressure at this time crushes it. The rock descends in the discharge direction by magnetic gravity and pushing force.

The size of the jaw crusher is determined according to the size of the jaw, and the size of the aggregate produced can be adjusted by adjusting the gap between the fixed plate and the moving plate, that is, the gap between the aggregate outlet. In particular, the movable jaw crusher is so powerful that it can crush even the hardest types of rocks.

In step 6, the cone crusher is a crushing device using impact and compressive forces, and a cone cave ball mounted on a frame by eccentric motion by attaching an umbrella-shaped cone mantle head on a short vertical central axis. The stone is bitten by the cone cave ball and is crushed as it descends.

Step 9 is a step of pouring the concrete retaining wall block composition using the recycled aggregate into the forming mold, and the concrete retaining wall block composition is poured into the forming mold to form a retaining wall block having a preset size and shape.

In this step, the retaining wall block can be manufactured by curing the concrete composition through general methods such as standard curing, wet curing, and sealing curing, but preferably, the retaining wall is cured by applying steam to the concrete composition through a steam curing method. Block manufacturing time can be greatly shortened. The steam curing method can rapidly cycle the mold, thereby increasing productivity and shortening the curing time.

To this end, the concrete composition is supplied to a mold having a vibration supply means and a steam supply means, and vibration is applied using the vibration supply means so that the concrete composition is uniformly filled in the mold, and then steam is supplied using the steam supply means. It can be supplied to cure the concrete composition.

Hereinafter, the configuration and effects of the present invention will be described in more detail through examples. These examples are only for illustrating the present invention, and the scope of the present invention is not limited by these examples.

The imported construction waste was first removed from the soil and clay lumps mixed with the concrete mass by using a 100 mm mango bag on an excavator (refer to FIG. 1). The concrete mass from which the soil and clay were removed was first crushed using a jaw crusher (refer to FIG. 2). The soil and soil were secondarily separated from the first crushed concrete block using a tromwell screen. (See Fig. 3). Foreign substances were removed from the concrete mass from which the soil was separated using a conveyor belt (see FIG. 4). The concrete mass from which the foreign material was removed was secondarily crushed using a 25 mm crusher (see FIG. 5). The second crushed concrete mass was crushed thirdly using a cone crusher (see FIG. 6). Recycled aggregates of 1 to 20 mm were selected from the tertiary crushed concrete mass using a vibrating screen (see FIG. 7). Recycled aggregate was prepared in the same way as above (see FIG. 8).

Request the recycled aggregate to the Korea Construction Quality Research Institute and measure the separation (grain size), density, absorption rate, stability, 0.08mm sieve passing amount, clay mass, particle shape determination performance rate, alkali potential reaction and foreign matter content Thus, it is shown in FIGS. 9 to 11 .

9 to 11, the recycled aggregate of Example 1 is the quality criteria of concrete aggregate, such as particle size, water absorption rate, stability, 0.08 mm sieve passing amount, clay mass, particle shape determination performance rate, alkali potential reaction and foreign matter content It can be seen that the result satisfies this criterion.

A concrete retaining wall block composition using recycled aggregate was prepared by stirring 25 parts by weight of normal Portland cement, 15 parts by weight of water, and 2 parts by weight of a polycarboxylic acid-based admixture to 100 parts by weight of the recycled aggregate of Example 1.

A photograph of a concrete retaining wall block obtained by steam curing the concrete retaining wall block composition using the recycled aggregate is shown in FIG. 12 .

[Comparative Example 1]

A concrete retaining wall block composition using recycled aggregate was prepared by stirring 100 parts by weight of cement, 500 parts by weight of recycled aggregate, 100 parts by weight of admixture, 10 parts by weight of expansion material, 2 parts by weight of AE water reducing agent, and 50 parts by weight of water. The recycled aggregate is manufactured by crushing the waste building structure, steam washing, coating the surface of the recycled aggregate with a fluorine-based water repellent, drying it at a temperature of 60°C for 20 minutes, and then fixing it at a temperature of 100°C for 10 minutes. did The recycled aggregate was used by mixing 50% by weight of recycled aggregate having a particle size of 10 to 25 mm and recycled aggregate having a particle size of 25 to 40 mm.

[Experimental Example 1]

After steam curing the concrete retaining wall block composition using the recycled aggregate prepared in Example 2 and the concrete retaining wall block composition using the recycled aggregate prepared in Comparative Example 1, each strength was tested, and the results are shown in Table 1. Tests were carried out according to the methods specified in KS F 2405 and KS F 2408, respectively.

division age Example 2 Comparative Example 1 flexural strength
(MPa) 1 day 5.1 3.9 7 days 7.0 4.4 28 days 8.1 5.1 compressive strength
(MPa) 1 day 31.2 28.7 7 days 38.1 32.8 28 days 45.2 38.7

As shown in Table 1, it can be seen that the flexural strength and compressive strength of the concrete retaining wall block composition prepared in Example 2 are higher than the flexural strength and compressive strength of the concrete retaining wall block composition prepared in Comparative Example 1.

In Example 1, a concrete retaining wall block composition using recycled aggregate was prepared in the same manner as in Example 1, except that 3 parts by weight of an antibacterial effect improving agent was additionally mixed with 100 parts by weight of the recycled aggregate.

The antibacterial effect improving agent is a mixture of 40% by weight of zeolite, 25% by weight of bentonite, 10% by weight of zinc oxide, 10% by weight of sodium hydroxide, 10% by weight of magnesium silicofluoride (MgSiF ₆ ), 4% by weight of tungsten, and 1% by weight of sulfur powder was prepared.

[Experimental Example 2]

For the concrete retaining wall block composition using the recycled aggregate prepared in Example 3 and the concrete retaining wall block composition using the recycled aggregate prepared in Comparative Example 1, E. coli was measured by KCL-FIR-1002 (shake culture method), and the test results were Table 2 shows.

coli test Example 3 Comparative Example 1 Test Methods BLANK
1.5×10 ⁴ 1.5×10 ⁴ 1.5×10 ⁴ KLC-FIR-1003
(Shake culture method) concentration after 24 hours
6.7×10 ⁴ <10 3.3×10 ⁴ Bacterial reduction rate (%) 99.9 50.7

As shown in Table 2, it can be confirmed that the concrete retaining wall block composition using the recycled aggregate prepared in Example 3 has superior antibacterial performance compared to the concrete retaining wall block composition using the recycled aggregate of Comparative Example 1.

In Example 1, a concrete retaining wall block composition using recycled aggregate was prepared in the same manner as in Example 1, except that 3 parts by weight of the durability improving agent was additionally mixed with 100 parts by weight of the recycled aggregate. The durability improving agent was prepared by mixing 40% by weight of epoxy resin, 25% by weight of butyl acrylate, 10% by weight of silicon dioxide, 10% by weight of aluminum nitride, 10% by weight of barium sulfate, and 5% by weight of fermented fucoidan.

The fermented fucoidan solution was obtained by immersing fucoidan in aronia vinegar at 25° C. for 5 minutes, and steaming the fucoidan immersed in the aronia vinegar at 110° C. for 20 minutes, and 500 parts by weight of purified water based on 100 parts by weight of the steamed fucoidan. parts were added and heated at 120° C. for 1 hour to obtain a fucoidan extract, 1 part by weight of fluranase was added to 100 parts by weight of the fucoidan extract, followed by enzyme treatment at 45° C. for 3 hours, and 100 parts by weight of the enzyme-treated fucoidan extract 5 parts by weight of aronia fermented broth and 5 parts by weight of blueberry fermented broth were added, fermented at 30° C. for 60 days, and then filtered to obtain a fucoidan fermented broth.

In the aronia vinegar, aronia is immersed in purified water at 30° C. for 1 minute, and 40 parts by weight of the immersed aronia is added to 100 parts by weight of the brown rice extract, heated at 105° C. for 60 minutes, and then filtered to obtain the aronia extract. 4 parts by weight of the liquefied enzyme was added to 100 parts by weight of the aronia extract and liquefied at 60° C. for 30 minutes, and 4 parts by weight of the saccharification enzyme was added to 100 parts by weight of the liquefied aronia extract and at 60° C. for 60 minutes. After saccharification, 3 parts by weight of yeast was added to 100 parts by weight of the saccharified aronia extract, followed by alcohol fermentation at 30° C. for 4 days to obtain an alcoholic fermentation solution, and 5 parts by weight of acetic acid bacteria were added to 100 parts by weight of the alcoholic fermentation solution and 13 days at 30° C. Acetic acid fermentation was carried out for a period of time to prepare an acetic acid fermentation broth, and the acetic acid fermentation broth was aged at 20° C. for 10 days. The brown rice extract was prepared by adding 15 parts by weight of brown rice, 5 parts by weight of coltsfoot, 5 parts by weight of burdock root and 5 parts by weight of Eugeun skin to 100 parts by weight of purified water and heating at 105° C. for 30 minutes. The aronia fermentation broth was prepared by mixing 50% by weight of aronia, 45% by weight of fructooligosaccharide, and 5% by weight of xylose and fermenting it at 25° C. for 30 days. The blueberry fermented solution was prepared by adding 5 parts by weight of yeast to 100 parts by weight of blueberry juice and fermenting at 25° C. for 50 hours.

[Experimental Example 3]

Table 3 shows the quality characteristics of the concrete retaining wall block compositions using recycled aggregates prepared in Example 4 and Comparative Example 1.

Freeze-thaw resistance chemical resistance impact resistance Example 4 Great Great Great Comparative Example 1 usually usually usually Freeze-thaw resistance is measured at -18~4℃ for 1 cycle until the relative dynamic modulus becomes 60%, and it is usually 40 cycles or more and 50 cycles or more for rainwater.

Chemical resistance is the mass loss rate after immersion in 5% sulfuric acid solution for 180 days, usually 155 or less and 9% or less in rainwater.

Impact resistance is the number of drops of a steel ball, so 2-3 times is normal, and 4 or more times is excellent.

As shown in Table 3, it can be confirmed that the concrete retaining wall block composition using the recycled aggregate prepared in Example 4 has excellent freeze-thaw resistance, chemical resistance and impact resistance compared to the concrete retaining wall block composition using the recycled aggregate of Comparative Example 1. there is.

Claims (4)

In 100 parts by weight of recycled aggregate, 20-30 parts by weight of cement, 10-20 parts by weight of water, 1-2 parts by weight of admixture and 1-3 parts by weight of antibacterial effect improving agent,
The recycled aggregate first removes the soil and clay lumps mixed with the concrete lump by using a 100 mm mesh bag on the excavator, and the concrete lump from which the soil and clay lumps are removed is subjected to a jaw crusher First crushing using The removed concrete mass is secondarily crushed using a 25 mm crusher, the second crushed concrete mass is third crushed using a cone crusher, and a vibrating screen is used from the tertiary crushed concrete mass to select 1~20mm of recycled aggregate,
The antibacterial effect improving agent is zeolite 30-40 wt%, bentonite 20-30 wt%, zinc oxide 10-20 wt%, sodium hydroxide 10-20 wt%, magnesium silicate (MgSiF ₆ ) 10-20 wt%, tungsten 1 ~5% by weight and containing 0.1 to 1% by weight of sulfur powder,
Concrete retaining wall block composition using recycled aggregate.
delete The method of claim 1,
Including 1 to 3 parts by weight of a durability improving agent additionally to 100 parts by weight of the recycled aggregate,
The durability improving agent is 30-40 wt% of epoxy resin, 20-30 wt% of butyl acrylate, 10-20 wt% of silicon dioxide, 10-20 wt% of aluminum nitride, 10-20 wt% of barium sulfate, and 1-5 wt% of fucoidan fermentation solution % by weight,
The fucoidan fermented liquid,
immersing fucoidan in aronia vinegar at 20-30° C. for 5-10 minutes;
steaming the fucoidan immersed in the aronia vinegar at 110-120° C. for 20-30 minutes;
obtaining a fucoidan extract by adding 500 to 600 parts by weight of purified water to 100 parts by weight of the steamed fucoidan and heating at 120 to 130° C. for 1 to 2 hours;
adding 1 part by weight of fluranase to 100 parts by weight of the fucoidan extract and enzymatic treatment at 45° C. for 3 hours; and
1-5 parts by weight of aronia fermented solution and 1-5 parts by weight of blueberry fermented solution were added to 100 parts by weight of the enzyme-treated fucoidan extract, fermented at 25-30° C. for 60-62 days, and then filtered to obtain a fucoidan fermented solution;
Uses manufactured including
The aronia vinegar,
immersing aronia in purified water at 20-30° C. for 1-2 minutes;
adding 30-40 parts by weight of the immersed aronia to 100 parts by weight of the brown rice extract, heating at 95-105° C. for 50-60 minutes, and then filtering to obtain an aronia extract;
adding 3 to 4 parts by weight of a liquefied enzyme to 100 parts by weight of the aronia extract and liquefying it at 60° C. for 20 to 30 minutes;
adding 3 to 4 parts by weight of a saccharification enzyme to 100 parts by weight of the liquefied aronia extract and saccharifying at 60° C. for 50 to 60 minutes;
adding 1 to 3 parts by weight of yeast to 100 parts by weight of the saccharified aronia extract and performing alcohol fermentation at 30 to 35° C. for 3 to 4 days to obtain an alcoholic fermentation;
adding 1 to 5 parts by weight of acetic acid bacteria to 100 parts by weight of the alcoholic fermentation broth and acetic acid fermentation at 30 to 35° C. for 10 to 13 days to prepare an acetic acid fermentation broth; and
Aging the acetic acid fermentation broth at 10-20 ° C for 10-30 days;
Uses manufactured including
The brown rice extract is prepared by adding 10-15 parts by weight of brown rice, 1-5 parts by weight of coltsfoot, 1-5 parts by weight of burdock root, and 1-5 parts by weight of Yugeun skin to 100 parts by weight of purified water and heating at 100-105° C. for 20-30 minutes. use one,
The aronia fermentation broth is fermented for 30-32 days at 20-25°C after mixing 45-50% by weight of aronia, 45-50% by weight of fructooligosaccharide, and 1-6% by weight of xylose,
The blueberry fermented liquid is used by adding 1 to 5 parts by weight of yeast to 100 parts by weight of the blueberry juice and fermenting it at 20 to 25° C. for 48 to 50 hours,
Concrete retaining wall block composition using recycled aggregate.
First removing the soil and clay lumps mixed with the concrete mass by using a 100 mm mesh bag on the excavator (step 1);
first crushing the concrete lump from which the soil and clay lumps have been removed using a jaw crusher (step 2);
Secondary separation of soil using a tromwell screen from the first crushed concrete mass (step 3);
removing foreign substances from the concrete mass from which the soil is separated using a conveyor belt (step 4);
Secondary crushing of the concrete mass from which the foreign matter has been removed using a 25 mm crusher (step 5);
third crushing the second crushed concrete mass using a cone crusher (step 6);
selecting the recycled aggregate of 1 to 20 mm using a vibrating screen from the tertiary crushed concrete mass (step 7);
Preparing a concrete retaining wall block composition using recycled aggregate including 20 to 30 parts by weight of cement, 10 to 20 parts by weight of water, and 1 to 2 parts by weight of an admixture to 100 parts by weight of the recycled aggregate (step 8);
pouring the concrete retaining wall block composition using the recycled aggregate into a mold (step 9); and
manufacturing a retaining wall block by curing the large crete retaining wall block composition using the recycled aggregate (step 10);
containing,
A method for manufacturing a concrete retaining wall block using recycled aggregate.

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