KR102012669B1 - Concrete segregation measuring method - Google Patents

Abstract

The present invention relates to a concrete material separation measurement method for reading whether the material is separated from the concrete by measuring the electrical resistivity of the concrete, comprising the steps of preparing concrete in which water, cement, aggregate and mixed materials are mixed; Pouring the concrete into formwork formed by a plurality of mold parts; Measuring a specific resistance of the concrete poured from a plurality of ring electrode parts respectively mounted inside the plurality of mold parts; And reading whether or not material is separated from the concrete through respective resistivity values transmitted from the ring electrode unit in a measurement unit connected to the ring electrode unit.

Description

Concrete material separation measurement method {CONCRETE SEGREGATION MEASURING METHOD}

The present invention relates to a concrete material separation measurement method, and more particularly, to a concrete material separation measurement method for reading whether or not the material separation of the concrete by measuring the electrical resistivity of the concrete.

When constructing concrete, a typical construction material, material separation may occur during concrete pouring due to poor mixing of concrete.

Concrete (water, cement, aggregate, and mixed material) is a construction material that has strength after undergoing curing (hardening) after being placed in a formwork after mixing (mixing) .The mixing state and mixing ratio of water, cement, aggregate, and mixed material In case of failure, the internal materials may be separated (not because the materials are not evenly distributed) because the density of each material is different. This is called material separation of concrete.

Therefore, when mixing and constructing concrete, an appropriate mixing ratio is required, and when the mixing is poor when aggregate separation (or material separation) occurs, it is impossible to play a role in poor strength or construction material after construction.

Accordingly, the existing measurement method used for measuring the separation of materials is based on the ASTM C 1610 measurement method (wet the coarse aggregates distributed in each layer by filling the concrete before solidification in a column-type cylinder with three stages of separation. -Measurement of coarse aggregates occurred during the internal casting of the cylinder according to the determination of material separation by measuring through sieving and sifting test.This conventional measurement method requires a lot of time and labor. Development of excluded real-time material separation measurements has been required.

Korea Patent Registration No. 10-1300813 Korean Patent Registration No. 10-1055224

One aspect of the present invention provides a concrete material separation measurement method for reading whether the material is separated from the concrete by measuring the electrical resistivity of the concrete.

The technical problem of the present invention is not limited to the technical problem mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the following description.

Concrete material separation measurement method according to an embodiment of the present invention, the step of preparing concrete in which water, cement, aggregate and mixed materials; Pouring the concrete into formwork formed by vertical coupling of a plurality of mold parts; Measuring a specific resistance of the concrete poured from a plurality of ring electrode parts respectively mounted inside the mold part; And reading whether or not material is separated from the concrete through respective resistivity values transmitted from the ring electrode unit in a measurement unit connected to the ring electrode unit.

In one embodiment, the mold portion, the cylindrical body; A seating protrusion protruding along an inner side of the main body so as to seat the ring electrode portion inside; And a through hole formed through one side of the main body.

In one embodiment, the main body, the first fastening jaw protruding downward along the lower inner side to be fastened to the upper portion of the other main body; And a second fastening jaw protruding upward along the outer side of the upper part to fasten the lower part of the other main body.

In one embodiment, the ring electrode portion is formed of an electrode having a circular ring shape, it can measure the specific resistance of all the contact points.

In one embodiment, in the step of measuring the specific resistance, each of the plurality of ring electrode parts can measure the specific resistance at a time and then collectively transfer the measured specific resistance values to the measurement unit.

In one embodiment, the step of measuring the specific resistance, respectively, after measuring the specific resistance sequentially from the ring electrode portion located in the upper side to the lower ring electrode portion may be transferred to the measurement unit in the measured specific resistance value sequentially.

In one embodiment, the step of measuring the specific resistance, each of the plurality of ring electrode unit may measure the specific resistance at a predetermined interval and then transfer the measured specific resistance to the measurement unit at a predetermined interval.

In an embodiment, the reading of whether the concrete is separated from the material may include: comparing respective resistivity values transmitted from the ring electrode part in the measuring part; And reading whether or not material is separated from the concrete according to each specific resistance value in the measuring unit.

In one embodiment, the step of comparing the specific resistance value, it is possible to sequentially compare the specific resistance value transmitted from the ring electrode portion located at the bottom from the specific resistance value transmitted from the ring electrode portion located at the top.

In an embodiment, the comparing of the specific resistance value may include comparing an average value of the specific resistance values transmitted from the upper ring electrode part with an average value of the specific resistances transmitted from the lower ring electrode part.

In an embodiment, the reading of whether the material is separated may include reading that no material separation occurs when each of the compared specific resistance values is within an error range, and reading that the material separation has occurred when it is outside the error range. .

In an embodiment, the method may further include measuring an ambient temperature in a temperature sensor mounted on an inner space or an outer side of the mold before reading the material separation.

In one embodiment, the step of reading whether the material is separated, may be stored in a database for the rate at which the material separation of the concrete is poured by receiving the temperature from the temperature sensor occurs by temperature.

In one embodiment, the step of preparing the concrete, in order to analyze the effect of the mixing ratio of the aggregate may be produced mortar and concrete according to the mixing ratio of the aggregate and coarse aggregate of 1: 1 or 1: 2 to the weight of the cement. .

In one embodiment, the step of preparing the concrete, AE agent and fluidizing agent may be added to indicate the effect of the chemical admixture (chemical admixture).

According to one aspect of the present invention, by providing a concrete material separation measurement method for reading whether or not the material separation of the concrete by measuring the electrical resistivity of the concrete, material properties of all positions that the cylindrical inner electrode touches through the ring electrode Can reflect.

1 is a view showing a schematic configuration of a concrete material separation measuring apparatus used for measuring the resistivity according to the present invention.
FIG. 2 is a view for explaining a first embodiment of the mold part in FIG. 1.
3 is a view for explaining a second embodiment of the mold part in FIG.
FIG. 4 is a diagram for explaining a ring electrode unit in FIG. 1.
FIG. 5 is a view for explaining the measurement unit in FIG. 1. FIG.
6 is a view showing an embodiment of the concrete material separation measuring apparatus used for measuring the resistivity of the present invention.
7 is a flowchart illustrating a method for measuring concrete material separation according to an embodiment of the present invention.
FIG. 8 is a flowchart illustrating a step of reading whether or not the concrete of FIG. 7 is separated.
9 is a view showing a microstructure change by hydration of cement particles.
It is a figure explaining a four-electrode method.

DETAILED DESCRIPTION The following detailed description of the invention refers to the accompanying drawings that show, by way of illustration, specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It should be understood that the various embodiments of the present invention are different but need not be mutually exclusive. For example, certain shapes, structures, and characteristics described herein may be embodied in other embodiments without departing from the spirit and scope of the invention in connection with one embodiment. In addition, it is to be understood that the location or arrangement of individual components within each disclosed embodiment may be changed without departing from the spirit and scope of the invention. The following detailed description, therefore, is not to be taken in a limiting sense, and the scope of the present invention, if properly described, is defined only by the appended claims, along with the full range of equivalents to which such claims are entitled. Like reference numerals in the drawings refer to the same or similar functions throughout the several aspects.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings.

1 is a view showing a schematic configuration of a concrete material separation measuring apparatus used for measuring the resistivity according to the present invention.

Specifically, the concrete material separation measuring apparatus according to an embodiment of the present invention, includes a plurality of mold unit 100, a plurality of ring electrode unit 200 and the measuring unit 300.

Prior to the detailed description of the respective components, the cause of the change in electrical conductivity according to the hydration process of concrete, the theoretical background of the present invention can be described as follows.

,

,

등의 이온이 용출되고, 이러한 이온들의 반응을 통해 수화물이 생성 된다. 생성된 수화물에 의해 시멘트 입자들의 응집(flocculation and aggregation)이 발생하며 최종적으로 도 9(b)와 같이 fluid depercolation 상태로 미세구조가 발전한다. 즉 공극수 감소에 따라 재료 내 전기 전도성 감소가 발생하며, 이는 수화물 증가에 따른 전자 흐름의 방해 때문인 것으로 설명될 수 있다. 따라서 재료 내 전기 저항 변화 측정으로 콘크리트의 수화물 생성 및 경화 과정을 나타낼 수 있다.Hardening and solidification of materials are progressed according to the hydration reaction during the early aging of concrete, and the microstructure of cement paste according to the hydration reaction is classified according to the phase change before and after solidification. It can be plotted as FIG. 9 (a) may be defined as a fluid percolation state in which a pore water network is formed in a hydration reaction start state immediately after cement paste is blended. This can result in electrical conductivity in the material through the internal pore water in a plastic state with sufficient fluidity and viscosity of the material before condensation. After the hydration reaction

,

,

Ions, such as elution, are hydrated through the reaction of these ions. Flocculation and aggregation of the cement particles is generated by the generated hydrate, and finally, the microstructure is developed into a fluid depercolation state as shown in FIG. 9 (b). In other words, the decrease in the pore number causes a decrease in the electrical conductivity in the material, which may be explained by the disruption of the electron flow due to the increase in the hydrate. Therefore, the measurement of the change in electrical resistance in a material can indicate the process of hydrate generation and hardening of concrete.

Conventional electrical resistivity measurement is mainly performed by Wener's 4-electrode method.Wenner's 4-electrode method24 is a resistivity measurement technique proposed by Frank Wenner in 1915 to install current and voltage electrodes at equal intervals. It has been used to measure earth resistivity. FIG. 10 is a diagram illustrating a four-electrode method, in which four electrodes (current auxiliary electrodes: two external electrodes and potential auxiliary electrodes: two internal electrodes) are provided at equal intervals in a straight line, and an ammeter is connected to the external electrodes to flow. Measure the current I. The internal electrode is connected to a voltmeter to measure the voltage V induced between the electrodes. That is, a current is connected by connecting a power supply between external electrodes, and ground resistance is calculated according to the measurement result of the voltmeter and the ammeter and Ohm's law (R = V / I). Therefore, if the distance between the electrodes is a, the electrical resistivity in the material is calculated from Equation 1, and the calculated electrical resistivity value represents the average electrical resistivity as much as a depth.

[Equation 1]

ρ = 2παＲ

In Equation 1, p denotes an electrical resistivity, α denotes an electrode gap, and R denotes a ground resistance.

The mold part 100 is formed of a non-conductive material, and is fastened in a cylindrical shape in the vertical direction so that the compounded concrete can be poured, thereby forming a formwork 1, and a ring electrode part 200 is mounted on the inner side thereof to provide specific resistance. Measure it.

In one embodiment, the mold unit 100 may have various diameters or heights corresponding to the amount of concrete to be poured.

In one embodiment, the mold part 100 may include a lower cover (not shown in the drawings for convenience of description) to seal the open space in the lower part in order to prevent the poured concrete from leaking.

In one embodiment, the mold unit 100 is formed of a transparent or semi-transparent material, it is preferable that the operator can easily check the pouring height of the concrete poured therein with the naked eye.

The ring electrode part 200 is formed in a circular ring shape, and is mounted on the inside of the mold part 100 so as to measure the specific resistance of the concrete poured in the formwork 1.

In one embodiment, the ring electrode portion 200 may be formed in a structure in which a layer layer is inserted into the cylindrical formwork (1).

The measuring unit 300 is connected to the ring electrode unit 200 and receives the resistivity measured by the ring electrode unit 200 to measure whether the material is separated from the concrete placed in the formwork 1.

Concrete material separation measurement apparatus having the configuration as described above, unlike the conventional material separation measurement method can easily determine the internal aggregate state and the material separation state through the electrical resistivity measurement.

Concrete material separation measuring device having the configuration as described above, by reading the specific resistance of the concrete by measuring the electrical resistivity of the concrete, the cylindrical formed by the plurality of mold parts 100 through the ring electrode portion 200 In the form 1 of the form can reflect the material properties of all positions that the ring electrode 200 is in contact.

FIG. 2 is a view for explaining a first embodiment of the mold part in FIG. 1.

Referring to FIG. 2, the mold part 100 includes a main body 110, a seating protrusion 120, and a through hole 130.

The main body 110 is formed in a cylindrical shape, and the seating protrusion 120 is formed along the inner surface.

In one embodiment, the main body 110 may be formed of a cylindrical non-conductive material (eg, a drone, an acrylic barrel, etc.) and may have a structure in which a ring electrode part 200, which is a conductor, is inserted therein.

The mounting protrusion 120 protrudes along the inner side of the main body 110 to allow the ring electrode 200 to be seated therein.

The through hole 130 is formed to penetrate through one side of the main body 110 so that the connecting pin 310 to be described later is inserted. In this case, the connecting pin 310 may be connected to the ring electrode part 200 after passing through the main body 110 through the through hole 130, thereby receiving the resistivity measured by the ring electrode part 200. .

In one embodiment, the through hole 130, by forming a diameter corresponding to the thickness of the connection pin 310, is formed unnecessarily large so as to form a space after the connection pin 310 is inserted into the form (1) It is desirable to prevent the poured concrete from leaking through the space.

In one embodiment, the main body 110 may have a height of 20 mm, and may vary in height in response to the amount of concrete to be poured.

In one embodiment, the mold part 100 may form a cylindrical formwork 1 having a height of 500 mm by fastening a plurality of main bodies 110 in the vertical direction, and varying the height in response to the amount of concrete to be poured. Can be formed.

3 is a view for explaining a second embodiment of the mold part in FIG.

Referring to FIG. 3, the mold unit 100 may include a main body 110, a seating protrusion 120, a through hole 130, a sealing seal 140, a first fastening jaw 150, and a second fastening jaw 160. ). Here, the main body 110, the mounting protrusion 120, and the through hole 130 are the same as the components of FIG. 2, and thus description thereof is omitted.

The sealing seal 140 is formed on the upper or lower portion of the main body 110 to seal the gap when the main body 110 is fastened up and down.

In one embodiment, the sealing seal 140 is preferably formed in the middle along the upper or lower surface of the main body 110 to completely seal the upper or lower portion of the main body 110.

The first fastening jaw 150 is formed to protrude downward along the lower inner side of the main body 110-1, and the second fastening jaw 160 protrudes upward from the upper outer side of the other main body 110-2. It is fastened to the inside of the.

The second fastening jaw 160 is formed to protrude upward along the upper outer side of the main body 110-2, and is lowered from the lower inner side of the main body 110-1 fastened to the upper side of the main body 110-2. The first fastening jaw 150 formed to protrude into the space formed inside to be fastened.

In one embodiment, the sealing seal 140 is formed on the lower portion 140-2 of the first fastening jaw 150 or the upper portion 140-1 of the second fastening jaw 160, thereby forming a form (1) ) Can prevent the concrete poured out.

FIG. 4 is a diagram for explaining a ring electrode unit in FIG. 1.

Referring to FIG. 4, the ring electrode part 200 is formed in a circular ring shape and is mounted in a space formed inside the mold part 100.

The ring electrode part 200 may be formed to have a thickness of 2 mm, but may vary in thickness in response to a measurement environment (for example, the amount of concrete, or a mixing ratio).

The ring electrode unit 200 may measure the specific resistance of all the positions that the electrode of the circular ring shape touches.

The ring electrode unit 200 having the above-described configuration, unlike the resistivity measuring method through the conventional electrode, forms a circular ring-shaped electrode and measures the resistivity at all positions where the electrode touches the mold 1. The resistivity of poured concrete can be measured more effectively.

FIG. 5 is a view for explaining the measurement unit in FIG. 1. FIG.

Referring to FIG. 5, the measurement unit 300 includes a plurality of connection pins 310, a plurality of connection clips 320, and a material separation measurement unit 330.

The connecting pin 310 is inserted through the through hole 130 and is connected to the ring electrode part 200, and the part not inserted into the through hole 130 is fastened to the connection clip 320 by the ring electrode part. The specific resistance measured at 200 is transferred to the connection clip 320.

The connection clip 320 receives the specific resistance value from the ring electrode part 200 through the connection pin 310 after the connection pin 310 is fastened, and the received specific resistance value of the material separation measuring unit 330. To pass.

The material separation measuring unit 330 receives the resistivity value from the connection clip 320 and compares the received resistivity value to measure whether the concrete is poured into the formwork 1.

In one embodiment, the material separation measuring unit 330 receives the specific resistance values of each part measured from the plurality of connection pins 310-1 to 310 -N, and the difference between the specific resistance values of the respective received parts. By reading, it is possible to determine whether the concrete is separated.

For example, if the specific resistance value of the concrete located on the top of the formwork (1) is 10, the specific resistance value of the concrete located at the bottom is 10, the specific resistance value is the same, it can be seen that no material separation occurs, If the specific resistance of the concrete is 10, the specific resistance of the concrete placed in the lower portion is 20 because the specific resistance is different from each other it can be seen that the material separation occurred.

In this case, the specific resistivity values transmitted from the plurality of connecting pins 310-1 to 310 -N are compared with each other, or divided into sections, and the average specific resistance of the upper three connecting pins 310-1 to 310-3 is compared. The value, average resistivity of the middle three connecting pins 310-4 to 310-6 and the lower three connecting pins 310-7 to 310-9 may be compared.

In one embodiment, the material separation measuring unit 330 is a method of measuring the resistivity of the plurality of ring electrode parts 200-1 to 200 -N, and i) a plurality of ring electrode parts 200-1 to 200 -N. ) All-in-one measurement mode for measuring specific resistance all at once; ii) Sequential measurement mode for sequentially measuring specific resistance from ring electrode part 200-1 located on the upper side to ring electrode part 200-N located on the lower side, i) The ring electrode located at the top of the gap measurement mode and ⅳ) in which a plurality of ring electrode parts 200-1 to 200 -N measure specific resistance at predetermined intervals (for example, 30 minutes to 1 hour, etc.). Deviation of the specific resistance values of the ring electrode unit 200-10 and the ring electrode unit 200-10 (the ring electrode unit 200 is formed in a total of 10 (200-1 to 200-10)) located at the bottom of the unit 200-1 The specific resistance can be measured in a mode such as a deviation measurement mode that compares the deviation between the specific resistance values of the ring electrode part 200-5 and the ring electrode part 200-6 positioned in the middle of the gap. The.

According to the above-described deviation measurement mode, when material separation starts, the ring electrode part 200-1 located at the top and the ring electrode part 200 located at the bottom are expected to have the largest separation due to the difference in distance between them. By comparing the deviation of the resistivity value between -10) and the deviation of the resistivity value between the ring electrode portion 200-5 and the ring electrode portion 200-6 located in the middle where the material separation is least likely to occur adjacent to each other. As a result, the occurrence of material separation can be measured more accurately and numerically. That is, when the deviation between the ring electrode parts 200-1 and 200-10, which is expected to occur most frequently, is 10, the ring electrode parts 200-5 and 200-6 that are expected to occur the least when material separation occurs. ), If the deviation is 3, the difference in the deviation is 7, and it can be determined that a lot of material separation of the concrete is generated, and when the deviation of the ring electrode parts 200-1 and 200-10 is 4, the material separation is the most. When the deviation between the ring electrode portions 200-5 and 200-6, which are expected to occur at a time of 2, is 2, the difference in deviation may be 2, and it may be determined that less material separation of concrete occurs.

In one embodiment, the material separation measuring unit 330, in the case of the above-described interval measuring mode, the change in the specific resistance value transmitted from each of the ring electrode parts 200-1 to 200-N for each transmission time, It is stored for each delivery position, and the change of the stored resistivity value can be graphed for each time or position and displayed through display means (for example, LCD / LED monitor).

6 is a view showing an embodiment of the concrete material separation measuring apparatus used for measuring the resistivity of the present invention.

Referring to FIG. 6, the concrete material separation measuring apparatus includes a plurality of mold parts 100 and a plurality of ring electrode parts 200.

The mold part 100 is formed of an insulator material, and is fastened in a cylindrical shape in the vertical direction so that the compounded concrete can be poured to form the formwork 1.

The ring electrode part 200 is formed in a circular ring shape, and is mounted on the inside of the mold part 100 so as to measure the specific resistance of the concrete poured in the formwork 1.

In one embodiment, the ring electrode 200 may be formed to a thickness of 2mm.

In one embodiment, the ring electrode unit 200 may measure the specific resistance of all the positions touched by the electrode of the circular ring shape.

7 is a flowchart illustrating a method for measuring concrete material separation according to an embodiment of the present invention.

Referring to FIG. 7, in the method of measuring concrete material separation, first, concrete, in which water, cement, aggregate, and a mixed material, which may be samples for material separation measurement, is prepared, is prepared (710).

In one embodiment, in the above step 710, in order to analyze the effect of the mixing ratio of the aggregates to produce mortar and concrete according to the mixing ratio of fine aggregate and coarse aggregate of 1: 1 or 1: 2 to the weight of the cement, or admixture ( AEs and glidants may be added to show the effects of chemical admixtures. Accordingly, it is possible to read whether or not material separation occurs due to the increase in the content of the aggregate or the addition of the admixture.

After preparing the concrete in the above-described step 710, the concrete prepared in 710 is poured into the formwork (1) formed by a plurality of mold portion 100 (720).

After the concrete is poured in step 720, the specific resistance of the concrete poured from the plurality of ring electrode parts 200-1 to 200-N respectively installed inside the plurality of mold parts 100 is measured (730). ).

In one embodiment, in step 730 described above, the specific resistance of the concrete is sequentially measured from the ring electrode portion 200 located at the top to the ring electrode portion 200 located at the bottom, and then the measured resistance is measured. Can be delivered sequentially.

In the above-described step 730, as a method of measuring the specific resistance of the plurality of ring electrode parts 200-1 to 200-N, i) the specific resistance of the plurality of ring electrode parts 200-1 to 200-N is measured at once. Batch measurement mode, ii) a sequential measurement mode in which the specific resistance is sequentially measured from the ring electrode portion 200-1 disposed on the upper side to the ring electrode portion 200-N located on the lower side, i) a plurality of ring electrode portions 200- The specific resistance may be measured in a mode such as an interval measuring mode in which the specific resistance is measured at a predetermined interval (for example, an interval of 30 minutes to 1 hour, etc.).

In one embodiment, in the above-described interval measuring mode, by measuring the specific resistance value over time, it is possible to determine the degree of material separation of each part over time.

After measuring the resistivity in step 730 described above, the measurement unit 300 connected to the ring electrode unit 200 reads whether the material is separated from the concrete through the respective resistivity values transmitted from the ring electrode unit 200 ( 740).

The concrete material separation measuring method having the steps as described above may further include the step of measuring the ambient temperature in a temperature sensor mounted on the inner space or the outer side of the mold part before the step of reading whether the material is separated. have.

Accordingly, in step 730, the database stores and stores the rate at which the material separation of the concrete being poured by receiving the temperature from the temperature sensor for each temperature, so that the temperature may be considered as an element in the future material separation determination. can do.

Concrete material separation measuring method having the steps as described above, it is possible to measure the specific resistance value according to the ratio of water, cement, aggregate and mixed material which is the material of the concrete.

In general, the specific resistance increases with the aggregate content, and the aggregate aggregate content has a great influence on the initial resistivity compared to the coarse aggregate, and the use of admixtures in the same formulation does not significantly affect the initial resistivity result, and the rapid rise of the electrical resistivity. It is also determined by the composition of the material and the mixing ratio.

In addition, as the aggregate content increases, the rise time and the time of condensation are shortened, and the use of an admixture (AE agent, a fluidizing agent) that delays the time of condensation in the same formulation can also be determined by measuring electrical resistivity.

FIG. 8 is a flowchart illustrating a step of reading whether or not the concrete of FIG. 7 is separated.

Referring to FIG. 8, first, the specific resistance values transmitted from the ring electrode unit 200 are compared in the measurement unit 300 (741).

In an embodiment, the above-described step 741 may sequentially compare the specific resistance values transmitted from the ring electrode unit 200 positioned at the lowest stage from the specific resistance values transmitted from the ring electrode unit 200 disposed at the uppermost stage.

In an embodiment, the above-described step 741 may be performed when the ring electrode part 200 (for example, the ring electrode part 200 is formed in a total of ten ring electrode parts 200-1 to 200-10) formed thereon. Therefore, the average value of the specific resistance value transmitted from the ring electrode portion 200-1 to the ring electrode portion 200-5 and the ring electrode portion 200 (for example, the ring electrode portion 200 positioned below) When a total of 10 ring electrode parts 200-1 to 200-10 are formed, the average value of the specific resistance values transmitted from the ring electrode part 200-6 to the ring electrode part 200-10 can be compared. .

After comparing the specific resistance values in step 741, the measurement unit 300 reads whether or not the material is separated from the concrete according to the specific resistance values (742).

In the above-described step 742, whether the material is separated or not may be read as if the respective resistivity values compared are within an error range, and no material separation is generated, and if it is outside the error range, the material separation may be read.

Although the above has been described with reference to the embodiments, those skilled in the art will understand that various modifications and changes can be made without departing from the spirit and scope of the invention as set forth in the claims below. Could be.

1: formwork 100: mold part
110: main body 120: seating protrusion
130: through hole 140: sealing seal
200: ring electrode 300: measuring unit
310: connecting pin 320: connecting clip
330: material separation measuring unit

Claims (8)

Preparing concrete in which water, cement, aggregate, and admixture are blended;
Placing the concrete on a mold formed by vertical coupling of a plurality of mold parts including a cylindrical body of a non-conductive material, a seating protrusion protruding along the inner side of the body, and a through hole formed through one side of the body; ;
Measuring specific resistances of the concrete poured from a plurality of ring electrode parts respectively installed inside the mold part by the seating protrusions;
Comparing respective resistivity values transmitted from the ring electrode unit in a measurement unit connected to the ring electrode unit; And
Comprising the step of reading the separation of the material of the concrete according to the respective resistivity value in the measuring unit,
The measuring unit,
Connection pins inserted into the through-holes and connected to the ring electrode portion and protruding portions not inserted through the through-holes; It includes a material separation measurement unit for comparing a plurality of specific resistance values transmitted through the connection clip,
Measuring each of the specific resistance,
The specific resistance value of the ring electrode part located at the top end and the specific resistance value of the ring electrode part located at the bottom end and the resistance values of the ring electrode parts located at two intermediate ends adjacent to the ring electrode part located at the top end are measured and transmitted to the measuring part.
Comparing the specific resistance value transmitted from the ring electrode portion,
The first deviation is calculated by comparing the specific resistance of the ring electrode part located at the uppermost end with the specific resistance of the ring electrode part located at the lowest end, and the second deviation is determined by comparing the specific resistance values of the ring electrode parts located at the two adjacent middle ends. Yields,
Reading whether the material is separated from the concrete,
Concrete material separation measurement method for reading whether the material of the concrete separation based on the difference between the first deviation and the second deviation.
The method of claim 1, wherein the main body,
A first fastening jaw protruding downward along the lower inner side to be fastened to an upper portion of the other main body; And a second fastening jaw protruding upwardly along the upper outer side to fasten the lower part of the other main body, and a sealing seal which is formed along the upper or lower part of the main body so as to seal the gap when the upper and lower bodies are fastened. Concrete material separation measurement method characterized in that.
The method of claim 1, wherein the ring electrode portion,
Concrete material separation measuring method characterized in that formed by the ring-shaped electrode, measuring the specific resistance of all the touched position.
The method of claim 1,
Measuring each of the specific resistance,
After measuring a specific resistance at a predetermined interval a plurality of ring electrode unit concrete material separation measurement method characterized in that for transmitting the measured specific resistance value to the measurement unit at a predetermined interval.
The method of claim 1,
Before the step of reading whether the material separation, concrete material separation measurement method further comprising the step of measuring the ambient temperature in a temperature sensor mounted on the inner space or the outside of the mold portion.
The method of claim 5, wherein the reading of the material separation is performed.
Concrete material separation measuring method, characterized in that the temperature of the material received from the temperature sensor is poured into the database to store the rate at which the material separation occurs.
The method of claim 1, wherein preparing the concrete comprises:
Method for measuring the separation of concrete material, characterized in that to produce mortar and concrete according to the mixing ratio of the aggregate and coarse aggregate of 1: 1 or 1: 2 to the weight of cement to analyze the effect of the mixing ratio of the aggregate.
The method of claim 7, wherein preparing the concrete,
A method for measuring the separation of concrete materials, comprising adding an AE agent and a glidant to show the influence of a chemical admixture.

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