KR20090122639A - Plant for production of ready mix concrete by using bottom ash as aggregates and method for thereof - Google Patents

Abstract

PURPOSE: A plant for manufacturing ready-mixed concrete using bottom ash aggregate and a manufacturing method thereof are provided to produce the ready-mixed concrete massively reclaimed in a landfill site. CONSTITUTION: A plant for manufacturing ready-mixed concrete using bottom ash aggregate comprises the following: a solid material measuring device driving part supplying the stored ready-mixed concrete, and installed at each silo; a liquid raw material measuring device driving part supplying the stored water and a mixing agent; and a control part controlling the each driving part and control the water quantity by operating the liquid material measuring device driving part of a water tank(5).

Description

Plant for manufacturing of ready mix concrete using bottom ash aggregate and method for manufacturing}

The present invention relates to a plant for manufacturing ready-mixed concrete using bottom ash aggregate discharged from a coal-fired power plant, and more particularly, to a ready-mixed concrete having a strength equal to or greater than that of a ready-mixed concrete using general aggregate. The present invention relates to a plant for manufacturing ready-mixed concrete using a bottom ash aggregate prepared by hydrolyzing water to be added except water contained in the bottom ash aggregate, and a method of manufacturing the same.

General ready-mixed concrete is manufactured according to standard specification using cement, aggregate (coarse aggregate, sand), admixture and water.

Aggregates used in these ready-mixed concrete is used natural aggregates, natural aggregates are imported from foreign countries because of insufficient supply in the country, or used to crush the rock.

In order to solve the problem of aggregate shortage, a technology related to a high-strength concrete composition using bottom ash is disclosed in Korean Patent Laid-Open Publication No. 10-2005-0001983.

The technique disclosed in the above publication is a high-strength concrete composition using water, cement, sand, intermediate aggregate, coarse aggregate, etc., wherein the concrete component is 30 to 40% by weight of cement, 15 to 25% by weight of bottom ash as a substitute for sand %, 10 to 20% by weight of bottom ash as an intermediate aggregate substitute, 10 to 20% by weight of bottom ash as a coarse aggregate substitute, 5 to 10% by weight of fine powder, and is made by adding a admixture (latex).

In addition, a technique related to a high-performance concrete composition using a bottom ash is disclosed in Republic of Korea Patent Publication No. 10-2005-0082083.

The technique disclosed in the publication is a composition of high-performance concrete used by mixing water, cement, aggregate, and general sand, wherein the aggregate is a natural crushed coarse aggregate, the size of the natural crushed coarse aggregate is 10 to 25 mm, Bottom ash sand, which is a waste generated from a thermal power plant, is used as a substitute for general sand, and the size of the bottom ash sand is 5 mm or less, and the bottom ash sand is a component of the concrete composition. 20 to 26% by weight, the natural stone coarse aggregate comprises 34 to 46% by weight of the total required composition components per m 3, admixtures, glidants and water reducing agents are added to the composition, the mixed amount of water is added to the cement By curing in water at 20 to 25% by weight, the design strength of concrete is applied to 600 to 800kg / ㎠ The.

Concrete compositions using bottom ash as disclosed in the above publication are effective in the case of mainly made in the laboratory or a small amount of concrete.

That is, the technique disclosed in the above publication does not disclose a method for producing a ready-mixed concrete on a large scale using bottom ash, and no such attempt has been made.

This is because there is no operation data for producing products with the same physical properties as the general ready-mixed concrete using only bottom ash as aggregate, and bottom ash embedded in the landfill of thermal power plants has various sizes and water content. This is because there was a limitation in applying the ready-mixed concrete ready-to-use concrete bottom ash, which has an unspecified water content of 35%.

Therefore, an object of the present invention is to solve the conventional problems as described above, by using the bottom ash aggregate (coarse aggregate or fine aggregate), the bottom can produce a product of the same or higher strength than the conventional ready-mixed concrete at low cost It is to provide a plant for producing ready-mixed concrete using ash aggregates and a method of manufacturing the same.

In addition, another object of the present invention is to improve the properties of the ready-mixed concrete by accurately controlling the water / cement ratio, a plant for manufacturing a ready-mixed concrete using a bottom ash aggregate having the properties according to the requirements of the ready-mixed concrete consumer and its manufacturing method It is to provide.

A ready-mixed concrete manufacturing plant using a bottom ash aggregate according to the present invention for achieving the above object is a ready-mixed concrete manufacturing plant consisting of a plurality of silos, a plurality of tanks, a conveyor and a mixer, each installed in each silo and stored in each A solid material raw material meter driving unit for supplying cement, a bottom ash coarse aggregate having a specific water content, a bottom ash fine aggregate, and a mixed material to the mixer through the conveyor; A liquid raw material metering device driver installed in each of the tanks to supply a predetermined amount of water and admixture stored in each of the mixers; To control the raw material metering device driver and the liquid material metering device driving unit for the supply of each raw material, to control the conveyor and the mixer, by measuring the water content contained in the bottom ash coarse aggregate and the bottom ash fine aggregate Calculating the amount of additional water required to match the water / cement ratio of the required physical properties, and controlling the liquid raw material meter drive of the water tank to supply the additional required water to the mixer. Control unit; Characterized in that it comprises a.

In addition, in the ready-mixed concrete manufacturing plant according to the present invention, the control unit is a storage unit for storing the composition ratio information and various physical properties of the raw materials required for manufacturing the ready-mixed concrete, the bottom ash coarse aggregate and the bottom ash aggregate included in the bottom ash aggregate And a microprocessor unit for controlling a water detection unit for detecting a water content, and a metering unit driving unit installed in the silo and the tank.

In addition, in the ready-mixed concrete manufacturing plant according to the present invention, the information stored in the storage unit is cement, bottom ash coarse aggregate, bottom ash fine aggregate, admixtures and admixtures of admixtures, water / cement ratio and slump, air amount, compressive strength It features.

In the ready-mixed concrete production plant according to the present invention, the composition ratio is 25 to 35% by weight of cement, 30 to 50% by weight of bottom ash coarse and 20 to 35% by weight of bottom ash fine aggregate and 0.2 to 0.8% by weight of the reducing agent The water / cement ratio is set in the range of 40 to 50%, respectively, the physical properties in the range of slump 10.0 cm W 2.0, air volume 3 to 5% and 28 days compressive strength 300 to 600 kg / cm 2 Characterized in that each is set.

In addition, the ready-mixed concrete manufacturing method using the bottom ash aggregate according to the present invention for achieving the above object consists of a plurality of silos, a plurality of tanks, conveyors and mixers,

A solid material measuring device driving unit installed in each silo and supplying a predetermined amount of cement and natural ash having a bottom ash coarse aggregate and a bottom ash fine aggregate having a specific water content to the mixer through the conveyor; A liquid raw material metering device driver installed in each of the tanks to supply a predetermined amount of water and admixture stored therein to the mixer; A controller for controlling solid material metering device drivers and liquid material metering device drivers for supplying the respective raw materials, and controlling the conveyor and the mixer; The control unit includes a storage unit for storing composition ratio information and various physical property information of the raw materials required for manufacturing the ready-mixed concrete, a moisture detection unit for detecting the water content contained in the bottom ash coarse aggregate and the bottom ash fine aggregate; In the ready-mixed concrete manufacturing method manufactured by a ready-mixed concrete manufacturing plant including a microprocessor for controlling each of the silo and the meter driving unit installed in the tank, the moisture of the bottom ash coarse aggregate and the bottom ash fine ash in the moisture detection unit A moisture content detection step of detecting the content; Calculating the amount of water further by subtracting the water content from the water / cement ratio in the physical property information stored in the storage unit; A water supply step of supplying the calculated water to the mixer; Characterized in that it comprises a.

In addition, in the ready-mixed concrete manufacturing method using the bottom ash aggregate according to the present invention, the control unit controls the metering device of the solid material metering device and the admixture tank to supply each raw material to the mixer through the conveyor It characterized in that it further comprises a supply step.

In addition, in the ready-mixed concrete manufacturing method using the bottom ash aggregate according to the present invention, the composition ratio of each raw material is 25 to 35% by weight of cement, 30 to 50% by weight of the natural bottom ash coarse aggregate having an unspecified water content and The bottom ash fine aggregate 20 to 35% by weight and the reducing agent is in the range of 0.2 to 0.8% by weight of the amount of cement, the water / cement ratio is characterized in that it is controlled in the range of 40 to 50%.

As described above, according to the plant for manufacturing ready-mixed concrete using bottom ash aggregate, and a method for manufacturing the same, the ready-mixed concrete is used as bottom aggregate (coarse aggregate, fine aggregate) using bottom ash, which is about 1 million tons of waste disposed at landfill in coal-fired power plant annually. The effect of mass production of is obtained.

In addition, according to the plant for producing ready-mixed concrete using the bottom ash aggregate according to the present invention and a method for manufacturing the same, by using a large amount of bottom ash as an aggregate, there is also an effect that can replace the depleted natural aggregate.

In addition, according to the plant for manufacturing ready-mixed concrete using the bottom ash aggregate according to the present invention and a method of manufacturing the same, by precisely controlling the water / cement ratio, it is possible to improve the properties of the ready-mixed concrete, having the properties according to the requirements of the ready-mixed concrete consumer It is also possible to supply ready-mixed concrete.

In addition, according to the plant for manufacturing ready-mixed concrete using the bottom ash aggregate according to the present invention and a method for manufacturing the same, it is not necessary to prepare a separate moisture measurement process because it does not separately measure the moisture contained in the aggregate in order to accurately match the water / cement ratio It is also effective to shorten the time of manufacturing the ready-mixed concrete.

Preparation of ready-mixed concrete by the plant according to the present invention determines the maximum aggregate size of coarse aggregate by crushing and separating bottom ash generated from coal-fired power plant, and the fine aggregate portion is classified into the same particle size of general river bed sand and stored in silos. High strength ready-mixed concrete is produced by mixing cement, bottom ash coarse aggregate, bottom ash fine aggregate, fluidizing agent (resining agent, etc.) and water.High-strength ready-mixed concrete is cement, high-strength admixture (fumed silica, fry ash) and water / The cement ratio is adjusted and mixed with the mixer of the batcher plant to produce it.

Hereinafter, the ready-mixed concrete production by the plant according to the present invention will be described in detail.

Cement used in the production of ready-mixed concrete by the plant according to the present invention may use general portland cement, fast-hard CSA cement and the like.

Admixtures can be used for the production of high-strength ready-mixed concrete, which is a spherical ultrafine particle that is produced as a by-product when a silicon alloy such as metal silicon or ferrosilicon is produced in an electric furnace, and has a main component of SiO ₂ and a particle size of about 1.5㎛. Fumed silica below can be used, and spherical fly ash after coal combustion in coal-fired power plant. The size of the particles varies depending on the combustion conditions or the collection method of the boiler, but a frying ash with a maximum particle size of about 20㎛ can be used. have.

The amount of the admixture can be used in the range of 1 to 30% by weight of the amount of cement used. The amount of the fried ash may vary depending on the size of the particles, but in the case of mixing the fumed silica with the frying ash as a mixed material, it is preferable to use 3 to 15% by weight of the cement, in which the fumed silica and the frying ash are used. The fumed silica is preferably used in an amount of 1 to 5% by weight and frying ash in a range of 3 to 10% by weight.

Increasing the amount of fumed silica can increase the compressive strength of the concrete, but the effect of increasing the tensile strength is not great, and when used in combination with a water reducing agent can increase the fluidity of the ready-mixed concrete composition.

If the amount of fumed silica is less than 1% by weight of cement, the effect of increasing the compressive strength is not significantly improved. If the amount of fumed silica is more than 5%, the economy is inferior to the effect of improving fluidity or increasing strength.

Bottom ash aggregate, which plays the most important role in ready-mixed concrete prepared by the plant according to the present invention, is a coagulation of ash after coal combustion generated in a boiler of a thermal power plant. Or a porous inorganic material, which is about 15 to 20% of the total ashing amount. In power plants, this mass ash is crushed with crushers and landfilled in landfills.

In order to use the bottom ash as aggregate of the ready-mixed concrete prepared by the plant according to the present invention, the classification is divided into 5-30 mm for coarse aggregates and 5 mm or less for fine aggregates.

The composition ratio of the ready-mixed concrete prepared by the plant according to the present invention is 30 to 50% by weight of coarse aggregate, 20 to 35% by weight of fine aggregate, 25 to 35% by weight of cement, 10.0 cm W 2.0 of slump, and 3 to 5% of air amount. The water / cement ratio is adjusted in the range of 40 to 50% as much as possible, and a suitable amount of the reducing agent and the high strength admixture are mixed according to the required strength to prepare a ready-mixed concrete according to the standard specification.

Table 1 shows the particle size distribution of the bottom ash coarse aggregate, Table 2 shows the particle size distribution of the bottom ash fine aggregate.

Particle size (mm) weight% Cumulative weight% +30 30/20 20/15 15/10 10/5 -5 5.0 21.5 15.0 23.5 33.5 1.5 5.0 26.5 41.5 65.0 98.5 100.0

Particle size weight% Cumulative weight% +4 4/8 8/16 16/30 30/50 50/100 -100 5.7 14.8 21.7 14.1 8.0 17.1 18.6 5.7 20.5 42.2 56.3 64.3 81.4 100.0

In the ready-made concrete prepared by the plant according to the present invention, a reducing agent for adjusting physical properties such as slump is used using PCA (poly carbonate acid), and 0.2 to 0.8 wt% of the amount of cement is added.

Hereinafter will be described a method for producing ready-mixed concrete produced by the plant according to the present invention having the composition ratio as described above.

1 is a conceptual diagram of a ready-mixed concrete manufacturing plant according to the present invention is applied to produce a ready-mixed concrete using a bottom ash.

In Fig. 1, reference numerals 1 to 4 denote silos for storing bottom ash coarse aggregate, bottom ash fine aggregate, cement and admixture which are solids, reference numeral 5 denotes a water tank for supplying water, and reference numeral 6 denotes a water reducing agent. Reducing agent tank for supplying Each silo and each tank is provided with metering devices M1 to M6 for metering and supplying the raw materials stored therein, and each silo 1, 2, 3, 4 is provided with solids from the silo. The vibrator is installed to supply smoothly.

Reference numeral 7 denotes a mixing tank in which water supplied from the water tank 5 and the water reducing tank 6 is mixed with the water reducing agent. The mixing tank 7 is also provided with a metering device M7 for metering and supplying a mixed liquid of water and a water reducing agent. When the water and the water reducing agent are directly supplied to the mixer 9 in the water tank 5 and the water reducing tank 6, the installation of the mixing tank 5 may be omitted.

In the silos 1, 2, 3, 4, the solids raw materials are fed to the belt conveyor 8.

Reference numerals S1 and S2 are moisture detection sensors for measuring the water content contained in the bottom ash coarse aggregate and bottom ash fine aggregate. Moisture sensor (S1) (S2) is the bottom ash coarse aggregate and the bottom ash aggregate is the information on the water content contained in each bottom ash aggregate in the process of supplying the silos (1) (2) to the belt conveyor (8), respectively Will be detected.

Hereinafter, a control unit for controlling the ready-mixed concrete manufacturing plant according to the present invention.

2 is a circuit diagram of a control unit for the control of the ready-mixed concrete manufacturing plant according to the present invention.

In Fig. 2, reference numeral 50 denotes a microprocessor unit and includes a central processing unit 51 and a determination unit 52.

Reference numeral 60 denotes a reference value, which is data such as composition ratio of raw materials, water / cement ratio, and physical properties of the ready-mixed concrete, which will be described below, and the composition ratio, water / cement ratio, and physical properties according to the embodiment required for manufacturing ready-mixed concrete. An input unit for inputting data such as a reference numeral 70 denotes a storage unit that stores a reference value input from the input unit 60.

The storage unit 70 includes the first to ninth recording areas, each of which includes cement, bottom ash coarse aggregate, bottom ash fine aggregate, admixture (fumed silica, fry ash), water reducing agent, water / Data of reference values for cement ratio, slump, air volume and compressive strength are stored respectively.

Reference numeral 81 denotes a moisture detection sensor for detecting the moisture content contained in the bottom ash aggregate when the aggregate is supplied to the belt conveyor 8 from the bottom ash coarse aggregate silo (1) and the bottom ash fine aggregate silo (2). S1) (S2). The analog signal for the water content detected by the moisture detection sensors S1 and S2 is converted into a digital signal by an analog / digital converter (A / D converter) 83 and input to the central processing unit 51.

Reference numeral 90 denotes bottom ash coarse aggregate silos (1) and bottom ash fine aggregate silos (2), cement silos (3), admixture silos (4), water tanks (5), water reducing tanks (6) and mixing tanks (7). And metering devices M1 to M6 as metering device drivers for metering and supplying each raw material or water or a mixed solution mixed with water and a water reducing agent. The metering devices M1 to M7 supply respective raw materials or water under the control of the central processing unit 51.

In FIG. 2, a water detector 81, an A / D converter 83, and a meter driving unit 90 are illustrated, respectively, but these are respective water detection sensors S1 and S2 and respective metering devices ( It is provided with the number of M1-M7).

Hereinafter, the control operation of the ready-mixed concrete manufacturing plant according to the present invention.

3 is a flowchart illustrating a control operation of the ready-mixed concrete manufacturing plant according to the present invention.

First, in the storage unit 70 of the control unit 100 of the ready-mixed concrete manufacturing plant according to the present invention, each raw material composition ratio (cement, coarse aggregate, cup) according to the embodiment of the ready-mixed concrete using the bottom ash aggregate as in the embodiment described below A reference value, which is data such as aggregate ratio, composition of fumed silica, frying ash, etc.), water / cement ratio, physical properties (slump, air amount, compressive strength), etc., is input and stored by the input unit 60 (step 10).

And when the amount and properties of the ready-mixed concrete required for manufacturing ready-mixed concrete using the bottom ash aggregate is input through the input unit 60, the central processing unit 51 is stored in the storage unit 70 through the determination unit 52 Compare with the first property reference value for each of the examples, and if not, with the second property reference value,. In the same case, the reference value is sent to the central processing unit 51 (step 20).

The central processing unit 51 drives the metering units M1 and M2 of the silos 1 and 2 through the metering unit driver 90 to transfer the bottom ash coarse aggregate and the bottom ash aggregate to the belt conveyor 8. The water content information contained in the bottom ash coarse aggregate and the bottom ash fine aggregate is obtained through the water detection sensors S1 and S2 of the water detection unit 81, and the amount of water by the water / cement ratio of the reference value is started. The amount of water to be additionally supplied is calculated by calculating the amount of water minus the amount of water contained in the bottom ash aggregate based on the water content information inputted from the moisture detection sensors S1 and S2 (step 30).

In addition, the central processing unit 51 is each of the cement, bottom ash coarse aggregate, bottom ash fine aggregate, admixture (fumed silica, frying ash, etc.), which are detected in the stem 20 according to the amount of ready-mixed concrete to be prepared, The amount is supplied, and the metering units M1 to M7 are driven through the metering unit driver 90 so that water is supplied in accordance with the amount of water calculated in step 30 (step 40).

Raw material or water supplied from each silo (1) (2) (3) (4) and each tank (5) (6) (7) is controlled by the central processing unit 51 when the supply is completed. Each weighing device drive unit 90 causes the driving of the weighing devices M1 to M7 to be stopped (step 50).

The raw materials of the ready-mixed concrete prepared in this way are loaded on the belt conveyor 8 to the drum mixer 9, and the water and the reducing agent mixture are also supplied to the drum mixer 9 by a pumping device not shown in the mixing tank 7. Then, the solid raw material and the liquid raw material are mixed in the drum mixer 9 to produce ready-mixed concrete using the bottom ash aggregate, and shipped by the pumping truck 10.

Plant for producing ready-mixed concrete according to the present invention as described above and a method for manufacturing the same in the water / cement ratio previously stored in the control unit 100 by using the information on the water content contained in the bottom ash coarse aggregate and bottom ash fine aggregate The metering device installed in the water tank (5) to calculate the amount of water minus the amount of water contained in the bottom ash aggregate, and to supply water from the water tank (5) only by the calculated amount of water ( By the process of driving M5), the water content contained in the bottom ash and the water supplied from the water tank 5 supply the amount of water by the ratio of water / cement required.

Therefore, it is possible to accurately control the physical properties of the ready-mix concrete, slump, air volume, compressive strength and the like, and by adjusting the water / cement ratio as needed, the ready-mixed concrete is adjusted according to the desired physical properties (slump, air volume, strength, etc.) It becomes possible to manufacture.

Hereinafter, an embodiment of a ready-mixed concrete using bottom ash aggregate to be applied to a plant for manufacturing ready-mixed concrete and its manufacturing method according to the present invention.

This embodiment is not limited to the plant for producing ready-mixed concrete according to the present invention and its manufacturing method, but in the scope of the same technical idea according to the present embodiment to the plant for producing ready-mixed concrete and its manufacturing method according to the present invention Of course, other embodiments may be applied.

EXAMPLE

Examples 1 to 9 are cement, bottom ash coarse aggregate, bottom ash fine aggregate, blended fumed silica and frying ash, water reducing agent, and water in the mixing ratio as shown in Table 3 by mixing the standard specifications of ready-mixed concrete specimens It is the result of measuring 28 days curing compressive strength. Here, the water / cement ratio includes the water contained in the bottom ash coarse aggregate and the bottom ash fine aggregate, to measure the water contained in the bottom ash coarse aggregate and the bottom ash fine aggregate to maintain the water / cement ratio accurately, The amount of water was subtracted from the amount of water according to the ratio of / cement, minus the amount of water contained in the bottom ash aggregates.

Examples 1 and 2 do not use admixtures, Examples 3 to 5 use only frying ash as the admixture, and Examples 6 to 9 use fumed silica and frying ash as admixture.

As shown in Table 3, these examples are used in the bottom ash coarse aggregate composition ratio of 30 to 42 wt%, the bottom ash fine aggregate composition ratio (less than 5 mm) of 22 to 35 wt%, and the cement 29 to 33 wt%, respectively. The specimens were prepared by adjusting the water / cement ratio in the range of 40 to 50% so as to have a slump of 8.0 to 10.0 cm and an air content of 3 to 5%, and appropriately mixing the water reducing agent and the high strength admixture according to the strength required. .

  division Ready-mixed concrete composition and compounding ratio (% by weight) Ready-mixed concrete cement Coarse aggregate Fine ash Breasted silica Fry Ash Reducing Agent (PCA) Water / cement slump Air volume (%) Compressive strength (㎏ / ㎠) Example 1 30 42 28 - - 0.25 50 10 5 320 Example 2 35 43 22 - - 0.25 50 10 5 370 Example 3 30 37 30 -  3 0.55 40 8 3 400 Example 4 30 34 30 -  6 0.50 40 8 3 420 Example 5 30 30 30 - 10 0.50 40 8 3 450 Example 6 33 35 25 One  6 0.75 40 8 3 450 Example 7 32 25 35 2  6 0.75 40 8 3 470 Example 8 31 30 30 3  6 0.75 40 8 3 490 Example 9 29 30 30 5  6 0.75 40 8 3 530

* Reducing agent: Addition amount to cement amount

[Comparative Example]

Comparative Example was prepared in the same manner as in the above Example, the aggregate was used as natural aggregates crushed gravel or bed sand.

  division Ready-mixed concrete composition and compounding ratio (% by weight) Ready-mixed concrete cement Coarse aggregate Fine ash Breasted silica Fry Ash Reducing Agent (PCA) Water / cement slump Air volume (%) Compressive strength (㎏ / ㎠) Comparative Example 1 30 42 28 - - 0.25 50 10 5 330 Comparative Example 2 35 43 22 - - 0.25 50 10 5 380

* Reducing agent: Addition amount to cement amount

When the specimen according to the embodiment of the present invention maintains the water / cement ratio accurately, it can be seen that the same compressive strength as the case of using the natural aggregate of the comparative example can be obtained, and when a high strength ready-mixed concrete is needed, various mixed materials By adding (fumed silica, frying ash) and a water reducing agent, it can be seen that the desired concrete properties can be obtained by the consumer.

In the above embodiment, although general water (hard water) is used, when the water / cement ratio is adjusted by using soft water, the alkali component of the cement can be reduced, thereby improving the durability and reducing the water (soft water) usage. Compressive strength could be improved and solidification time was shortened when specimen was produced.

Plant for producing ready-mixed concrete according to the present invention and a method for manufacturing the ready-mixed concrete using a bottom ash aggregate having the same or more physical properties and the concrete properties of the ready-mixed concrete using a concrete aggregate or crushed aggregates You can do it.

1 is a conceptual diagram of a ready-mixed concrete manufacturing plant according to the present invention is applied to produce a ready-mixed concrete using bottom ash

2 is a circuit diagram of a control unit for the control of the ready-mixed concrete manufacturing plant according to the present invention

3 is a flow chart for explaining the control operation of the ready-mixed concrete manufacturing plant according to the present invention

* Description of the symbols for the main parts of the drawings *

1: coarse aggregate silo 2: fine aggregate silo

3: cement silo 5: water tank

9: mixer 10: pumping truck

50: microprocessor unit 60: input unit

70: storage unit 81: moisture detection unit

90: metering device driving unit 100: control unit

Claims (7)

In a ready-mixed concrete manufacturing plant consisting of a plurality of silos, a plurality of tanks, a conveyor and a mixer, A solid material measuring device driving unit installed in each silo and supplying a predetermined amount of cement, a bottom ash coarse aggregate, a bottom ash fine aggregate, and a mixed material of natural state having an unspecified water content to the mixer through the conveyor; A liquid raw material metering device driver installed in each tank to supply a predetermined amount of water and admixture stored in each of the mixers; To control the raw material metering device driver and the liquid material metering device driving unit for the supply of each raw material, to control the conveyor and the mixer, by measuring the water content contained in the bottom ash coarse aggregate and the bottom ash fine aggregate Calculating the amount of additional water required to match the water / cement ratio of the required physical properties, and controlling the liquid raw material meter drive of the water tank to supply the additional required water to the mixer. Control unit; Ready-mixed concrete manufacturing plant comprising a. The method of claim 1, The control unit is a storage unit for storing the composition ratio information and various physical properties information of the raw materials required for manufacturing the ready-mixed concrete; A water detection unit detecting water content contained in the bottom ash coarse aggregate and the bottom ash fine aggregate; And a microprocessor unit for controlling the respective metering unit driving units installed in the silo and the tank. The method of claim 2, The information stored in the storage unit is cement, bottom ash coarse aggregate, bottom ash fine aggregate, admixtures and admixtures of admixtures, water / cement ratio and slump, air amount, compressive strength, characterized in that the ready-mixed concrete plant. The method of claim 3, wherein The composition ratio is 25 to 35% by weight of cement, 30 to 50% by weight of bottom ash coarse, 20 to 35% by weight of bottom ash fine aggregate and water reducing agent are set in the range of 0.2 to 0.8% by weight of cement, respectively. The ratio is set in the range of 40 to 50%, the physical properties of the ready-mixed concrete plant, characterized in that set in the range of slump 10.0 cm W 2.0, air volume 3-5% and 28 days compressive strength 300 to 600 kg / ㎠ . Composed of a plurality of silos, a plurality of tanks, conveyors and mixers, and installed in each of the silos, the bottom ash coarse aggregate and the bottom ash fine aggregate and admixture of natural state having an unspecified water content, respectively, through the conveyor A solid material measuring device driving unit which supplies a predetermined amount to the mixer; A liquid raw material metering device driver installed in each of the tanks to supply a predetermined amount of water and admixture stored therein to the mixer; A controller for controlling solid material metering device drivers and liquid material metering device drivers for supplying the respective raw materials, and controlling the conveyor and the mixer; The control unit includes a storage unit for storing composition ratio information and various physical property information of the raw materials required for manufacturing the ready-mixed concrete, a moisture detection unit for detecting the water content contained in the bottom ash coarse aggregate and the bottom ash fine aggregate; In the ready-mixed concrete manufacturing method manufactured by a ready-mixed concrete manufacturing plant comprising a microprocessor unit for controlling each of the silo and the meter driving unit installed in the tank, A water content detecting step of detecting water contents of the bottom ash coarse aggregate and the bottom ash fine aggregate in the water detection unit; Calculating the amount of water further by subtracting the water content from the water / cement ratio of the information stored in the storage unit; A water supplying step of supplying the calculated amount of water to the mixer; Ready-mixed concrete manufacturing method comprising a. The method of claim 5, The control unit further comprises a raw material supply step of supplying each raw material to the mixer through the conveyor by controlling the metering device of the solid material weighing device and the admixture tank. The method of claim 6, The composition of each of the raw materials is 25 to 35% by weight of cement, 30 to 50% by weight of natural ash ash coarse aggregate having an unspecified water content, and 20 to 35% by weight of bottom ash fine aggregate and the reducing agent is 0.2 to 0.8 of the amount of cement. And a water / cement ratio in the range of 40% by weight to a composition ratio of raw materials required for the production of ready-mixed concrete.

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