JP2024012356A - Concrete curing mat, concrete wet state monitoring device, and concrete curing device - Google Patents

Abstract

To provide a concrete curing mat that is advantageous for improving durability and improving efficiency of work.SOLUTION: A pair of electrode wires 18 are covered with an insulating material 20 to form an elongated shape, and a wet sensor 14 in which capacitance generated between the pair of electrode wires 18 is changed according to a wet state of a mat body 12 is incorporated in the mat body 12. Since the wet sensor 14 is protected by the mat body 12, even if the concrete curing mat 10 is repeatedly used, it is advantageous in improving the durability of the wet sensor 14. Since the wet sensor 14 covers the pair of electrode wires 18 with the insulating material, the deterioration of the pair of electrode wires 18 due to moisture can be suppressed, which is advantageous in improving the durability of the wet sensor 14. In a curing work of a concrete 16, since the labor for separately routing the wet sensor 14 is not required, it is advantageous in improving the efficiency of the work required for curing the concrete 16.SELECTED DRAWING: Figure 2

Description

The present invention relates to a concrete curing mat, a concrete wet condition monitoring device, and a concrete curing device.

Concrete develops its strength through a chemical reaction between water and cement, called a hydration reaction, so when curing concrete that has been poured, it is important to maintain a moist state on the surface of the concrete.
Therefore, the surface of the concrete is covered with a concrete curing mat, water is supplied to the concrete curing mat to keep the concrete surface in a moist state, and water is supplied once the concrete curing mat is dry.
Patent Document 1 discloses the following technology as a technology for detecting the wet state of a concrete curing mat.
That is, two ribbon-shaped metal sheets are prepared, two electrodes made of these metal sheets are installed between the concrete surface and the concrete curing mat, and a voltage is applied between the two electrodes to charge the battery. It is disclosed that the residual voltage is measured by discharging the electric charge, and if the residual voltage falls below a predetermined value, it is determined that the concrete curing mat is dry and the wet state is not maintained.

Unexamined Japanese Patent Publication No. 2018-3240

However, in the above-described conventional technology, since the electrodes are made of metal sheets, there is a concern that the electrodes may deteriorate due to exposure to moisture.
Furthermore, since it is necessary to install electrodes between the concrete surface and the concrete curing mat, there is room for improvement in terms of improving the efficiency of the work.
The present invention has been made in view of the above circumstances, and its purpose is to provide a concrete curing mat that is advantageous in terms of improving durability and improving work efficiency. Another object of the present invention is to provide a concrete moisture condition monitoring device and a concrete curing device using such a concrete curing mat.

In order to achieve the above object, the present invention provides a concrete curing mat, which includes a mat body that is laid on the surface of poured concrete and keeps the concrete in a moist state, and a pair of electrode wires that are covered with an insulating material. The wetness sensor is formed into an elongated shape and is incorporated inside the mat main body so that the capacitance generated between the pair of electrode wires changes depending on the wet state of the mat main body. .
Further, in the present invention, the mat main body has a constant width and a length perpendicular to the width, and the moisture sensors are arranged at intervals in the length direction of the mat main body and extend almost the entire length of the mat main body in the width direction. a plurality of connection extensions that connect end portions of the first extension portions that are adjacent in the longitudinal direction of the mat body at the ends of the width direction of the mat body; The first extending portion, which is located at one end of the mat main body in the longitudinal direction, is characterized in that it projects from the end of the mat main body in the width direction.
Further, the present invention is characterized in that the mat main body is divided into a plurality of regions, and the moisture sensor is installed in each of the plurality of regions separately and independently.
Further, the present invention is characterized in that the mat main body has a constant width and a length perpendicular to the width, and the regions are set by dividing the mat main body into sections each having a constant length. do.
Further, in the present invention, in the region, the moisture sensor includes a plurality of first extending portions that are spaced apart in the length direction of the mat body and extend over substantially the entire length in the width direction of the mat body; a plurality of connecting extension parts that connect end parts of the first extension parts adjacent in the longitudinal direction of the mat main body at the ends in the width direction of the main body; The first extending portion located at one end of the mat body is characterized in that it protrudes from an end portion in the width direction of the mat main body.
The present invention also provides a concrete wet state monitoring device, which includes a mat body that is laid on the surface of poured concrete and maintains the concrete in a wet state, and a pair of electrode wires covered with an insulating material to form an elongated shape. A concrete curing mat having a moisture sensor formed in the mat body and incorporated inside the mat body so that the capacitance generated between the pair of electrode wires changes depending on the wet state of the mat body; a physical quantity measuring unit that measures a physical quantity that changes in response to capacitance; a wetness determining unit that determines whether the mat main body is in a dry state based on the physical quantity measured by the physical quantity measuring unit; The mat main body is characterized by comprising a warning section that displays a warning on a display section when the wetness determining section determines that the mat main body is in a dry state.
The present invention also provides a concrete curing device, which includes a mat body that is laid on the surface of poured concrete and keeps the concrete in a moist state, and a pair of electrode wires that are covered with an insulating material and formed into an elongated shape. a concrete curing mat having a moisture sensor that is incorporated into the mat body and changes the capacitance generated between the pair of electrode wires depending on the moisture state of the mat body; a physical quantity measuring unit that measures a physical quantity that changes in accordance with the capacitance of the moisture sensor; and a physical quantity measuring unit that measures whether or not the mat main body is in a dry state based on the physical quantity measured by the physical quantity measuring unit. and a water supply control section that causes the water supply section to supply water when the moisture determination section determines that the mat main body is in a dry state.

According to the concrete curing mat of the present invention, the humidity sensor is formed into an elongated shape by covering a pair of electrode wires with an insulating material, and the capacitance generated between the pair of electrode wires changes depending on the wet state of the mat main body. is incorporated inside the mat body.
Therefore, since the moisture sensor is protected by the mat body, it is advantageous to improve the durability of the moisture sensor even if the concrete curing mat is used repeatedly.
Furthermore, since the humidity sensor has a pair of electrode wires covered with an insulator, deterioration of the pair of electrode wires due to moisture can be suppressed, which is advantageous in improving the durability of the humidity sensor.
In addition, when curing concrete, all you need to do is install a concrete curing mat on the surface of the concrete and supply water to the concrete curing mat, eliminating the need for a separate moisture sensor, making the work required for curing concrete more efficient. This will be advantageous in achieving this.
In addition, the moisture sensor includes a plurality of first extending portions spaced apart in the length direction of the mat body and extending over almost the entire length in the width direction of the mat body; a plurality of connection extension parts that connect the ends of the first extension parts adjacent in the direction, and the first extension part located at one end in the length direction of the mat main body is connected to the first extension part in the width direction of the mat main body. When the moisture sensor is made to protrude from the end, the moisture sensor is arranged evenly over the entire area of the mat main body, which is advantageous in reliably determining whether or not the entire area of the mat main body is in a dry state.
In addition, it is advantageous to divide the mat body into multiple areas and install a moisture sensor separately and independently in each of the multiple areas to accurately determine the dryness state of each area of the mat body. becomes.
In addition, if the mat body has a constant width and a length perpendicular to this width, and the area is set by dividing the mat body by a certain length, multiple areas can be efficiently divided into the mat body. This is useful for setting.
In addition, in the region, the moisture sensors are arranged at a plurality of first extending portions spaced apart in the length direction of the mat body and extending over substantially the entire length in the width direction of the mat body, and at the ends of the mat body in the width direction. a plurality of connection extension parts connecting the ends of adjacent first extension parts in the longitudinal direction of the main body, the first extension part located at one end in the length direction of the mat main body in the region; If the moisture sensor is made to protrude from the widthwise end of the main body, the moisture sensor will be arranged uniformly over the entire area in each area of the mat main body, which will be advantageous in accurately determining the dry state in each area. .
Further, according to the concrete moisture state monitoring device of the present invention, a physical quantity that changes in response to the capacitance of a moisture sensor built into the concrete curing mat is measured, and the mat body is adjusted based on the measured physical quantity. It is determined whether or not the mat body is in a dry state, and when it is determined that the mat main body is in a dry state, a warning is displayed on the display unit.
Therefore, the worker can easily and reliably know that the concrete curing mat is in a dry state and perform water supply work to the concrete curing mat, which is advantageous for efficiently performing concrete curing work. Become.
Further, according to the concrete curing device of the present invention, a physical quantity that changes in response to the capacitance of a moisture sensor built into the concrete curing mat is measured, and the mat main body is in a dry state based on the measured physical quantity. If it is determined that the mat itself is in a dry state, water is automatically supplied to the concrete curing mat, thereby saving labor and performing water supply work to the concrete curing mat. This is advantageous in efficiently performing concrete curing work.

It is a perspective view showing a concrete curing mat of a 1st embodiment and poured concrete. FIG. 2 is a sectional view illustrating the usage state of the concrete curing mat of the first embodiment. FIG. 3 is an explanatory diagram of a humidity sensor and a physical quantity measuring section. FIG. 2 is a block diagram showing the configuration of a concrete moisture state monitoring device using a concrete curing mat. It is a flowchart explaining the usage method of a concrete wet state monitoring device. FIG. 1 is a block diagram showing the configuration of a concrete curing device using a concrete curing mat. It is a flow chart explaining how to use a concrete curing device. FIG. 3 is an explanatory diagram showing a state in which moisture sensors are installed separately and independently in each of a plurality of regions of the mat main body.

(First embodiment)
Next, a concrete curing mat and a concrete wet state monitoring device according to an embodiment of the present invention will be described with reference to the drawings.
First, we will explain concrete curing mats.
As shown in FIGS. 1 and 2, the concrete curing mat 10 includes a mat body 12 and a moisture sensor 14.
The mat body 12 is laid on the surface 1602 of the poured concrete 16 to keep the concrete 16 in a moist state.
The mat body 12 is made of a material having water absorbing and water retaining properties, such as urethane foam, nonwoven fabric, or synthetic fiber, or is made of a sheet made of a laminated sheet of a plurality of these materials. Equipped with a water retention layer.
Further, in order to suppress evaporation of water from the water-retaining layer, a film may be attached to the surface of the water-retaining layer located on the opposite side to the surface 1602 of the concrete 16.
The mat main body 12 has a constant width W and a length L perpendicular to the width W, and is formed to have, for example, width W=1 m and length L=30 m to 50 m.

As shown in FIG. 3, the humidity sensor 14 includes a pair of electrode wires 18 and an insulating material 20 covering the pair of electrode wires 18, and is formed in an elongated shape.
In the present embodiment, the insulating material 20 (wetness sensor 14) has a strip shape having a width in the direction in which the electrode wires 18 are arranged, a thickness smaller than the width, and a length larger than the width. .
The pair of electrode wires 18 extend in parallel inside the insulating material 20 in the width direction of the insulating material 20 at a constant interval.
As shown in FIGS. 1 and 2, the humidity sensor 14 is incorporated inside the mat body 12, and the capacitance generated between the pair of electrode wires 18 changes depending on the wet state of the mat body 12. .

The humidity sensor 14 includes a plurality of first extensions 22 and a plurality of connection extensions 24 .
The plurality of first extending portions 22 are spaced apart in the length L direction of the mat main body 12 and extend over substantially the entire length of the mat main body 12 in the width W direction.
The plurality of connecting extension parts 24 connect the ends of the first extension parts 22 adjacent in the longitudinal direction of the mat main body 12 at the ends of the mat main body 12 in the width W direction.
The first extending portion 22 located at one end of the mat main body 12 in the length L direction projects from the end of the mat main body 12 in the width W direction. 36 (see FIG. 3).
In this way, the moisture sensor 14 is arranged over almost the entire area of the mat main body 12 in the width W direction and the length L direction.

Next, the concrete wet condition monitoring device will be explained.
As shown in FIG. 4, the concrete moisture state monitoring device 26 includes, in addition to the concrete curing mat 10 described above, a physical quantity measurement section 28, a moisture determination section 30, a display section 32, and a warning section 34. . The physical quantity measurement section 28, the wetness determination section 30, the display section 32, and the warning section 34 are incorporated into a single housing (not shown).
In this embodiment, a voltage detection section 36 (see FIG. 3), which will be described later, which constitutes a part of the physical quantity measurement section 28, a wetness determination section 30, and a warning section 34 are configured by a computer.
That is, the computer includes a CPU, a ROM that stores and stores control programs, a RAM that serves as an operating area for the control programs, and an interface unit that interfaces with peripheral circuits and the like.
The computer functions as a voltage detection section 36, a wetness determination section 30, and a warning section 34 when the CPU executes a control program.

The physical quantity measuring section 28 measures a physical quantity that changes in response to the capacitance of the humidity sensor 14.
As shown in FIG. 3, in this embodiment, the physical quantity measurement section 28 includes an input terminal 2802, a DC power supply 2804, a fixed resistor 2806, an output terminal 2808, and a voltage detection section 36.
Input terminal 2802 is connected to one end of a pair of electrode wires 18.
A DC power supply 2804 is connected to the input terminal 2802 and applies a constant DC voltage Vin between both electrode wires 18.
The fixed resistor 2806 extracts a charging voltage Et corresponding to a change in capacitance occurring between the pair of electrode wires 18.
Output terminal 2808 is provided connected to both ends of fixed resistor 2806.
The voltage detection section 36 detects the output voltage Vout of the output terminal.

A capacitor C1 is formed between the pair of insulated electrode wires 18 in accordance with the dielectric constant of an object existing between and around the pair of electrode wires 18.
Here, the dielectric constant of air is 1, and the dielectric constant of water is 80.4.
This capacitor C1 is connected in parallel along the length direction of the level sensor 24.
Therefore, the capacitance of the capacitor C1 formed when the mat body 12 is wet, that is, when moisture is present around the humidity sensor 14, is different from that formed when the mat body 12 is dry, that is, when the moisture sensor 14 is surrounded by moisture. This value is larger than the capacitance of the capacitor C1 formed in the absence of moisture around the capacitor C1.
That is, the higher the degree of wetness of the mat body 12 (the more moisture), the larger the capacitance of the capacitor C1 becomes, and the lower the degree of wetness of the mat body 12 (the less moisture), the larger the capacitance of the capacitor C1 becomes. The capacitance becomes a small value.
In other words, the capacitance of the capacitor C1 changes depending on the amount of moisture in the mat main body 12.

Therefore, a constant DC voltage Vin is applied from the input terminal 2802 between both electrode lines 18 to give charge to both electrode lines 18, and the output voltage Vout between both electrode lines 18 is measured by the voltage detection unit 36.
In this case, the relationship of output voltage Vout=Et/(R+2r) holds true. However, R is the resistance value of the fixed resistor 2806, and r is the specific resistance of the electrode wire 18.

The measurement result of the output voltage Vout by the voltage detection unit 36 changes depending on the capacitance of the capacitor C1, and therefore the measurement result of the output voltage Vout changes depending on the wet state (moisture content) of the mat main body 12.
Therefore, through experiments, we measured the value of the output voltage Vout in a state where the wet state (moisture content) of the mat body 12 is low and water supply to the mat body 12 is necessary, and determined that value as the threshold voltage Vr. If this is done, it can be determined that the mat main body 12 is dry and requires water supply when Vout<Vr.
Note that in this embodiment, a case has been described in which the physical quantity measurement unit 28 measures the voltage (output voltage Vout) as a physical quantity that changes in response to the capacitance of the humidity sensor 14, but the physical quantity is not limited. Instead, the physical quantity measuring section 28 may measure the capacitance itself of the humidity sensor 14 as a physical quantity.
However, the present embodiment simplifies the configuration of the physical quantity measuring section 28, which is advantageous in reducing costs.

As shown in FIG. 4, the wetness determining section 30 determines whether or not the mat body 12 is in a dry state based on the physical quantity (voltage value) measured by the physical quantity measuring section 28.
In the present embodiment, the wetness determining unit 30 compares the output voltage Vout with the threshold voltage Vr, and determines that the mat body 12 is dry and requires water supply when Vout<Vr. .

The display section 32 displays a warning, and in this embodiment is composed of an LED lamp.
The warning section 34 displays a warning on the display section 32 when the wetness determining section 30 determines that the mat main body 12 is in a dry state.
In the present embodiment, the warning section 34 displays a warning by blinking the display section 32 when the wetness determining section 30 determines that the mat main body 12 is in a dry state.
Further, the warning section 34 turns off the display section 32 when the wetness determining section 30 does not determine that the mat main body 12 is in a dry state (when the mat main body 12 is in a wet state).
By displaying such a warning, the wet state (dry state) of the mat main body 12 can be grasped at a glance.
Note that the form of the warning display on the display section 32 is not limited to blinking; for example, the display section 32 may be configured with an LED lamp that can emit light in two colors, red and green, to indicate that the mat main body 12 is in a dry state. The display unit 32 may be turned on in red when it is determined that there is, and the display unit 32 may be turned on in green when it is determined that it is not.
Further, a speaker may be provided in place of the display section 32, and the warning section 34 may generate a warning sound from the speaker. As the form of the warning, various conventionally known warning methods can be used.
Further, the concrete wet state monitoring device 26 is provided with a communication unit capable of communicating via a wireless line, and when the wetness determining unit 30 determines that the mat main body 12 is in a dry state, a warning unit 34 sends a message to the mat main body 12. Warning information indicating that the water is in a dry state may be generated.
In this case, the warning information may be transmitted from the communication unit to an external terminal such as a smartphone, tablet terminal, or personal computer via a wireless line, and the warning information may be displayed on the terminal.
In this way, even a worker who is located far from the concrete wet state monitoring device 26 can know through the terminal that the mat body 12 is in a dry state, and the curing work of the concrete 16 can be done efficiently. This is advantageous in terms of performance.

Next, how to use the concrete curing mat 10 and the concrete wet condition monitoring device 26 of this embodiment will be explained with reference to the flowchart of FIG. The concrete curing mat 10 is spread and placed on the surface 1602 facing upward so as to cover the entire area of the surface 1602 (step S10), and one end of the moisture sensor 14 is connected to the voltage detection section 36 of the physical quantity measurement section 28. The concrete wet state monitoring device 26 is brought into operation (step S12).
Next, water is supplied to the entire area of the concrete curing mat 10 (mat body 12) to make the entire area of the concrete curing mat 10 wet and ready for curing the concrete 16 (step S14).

The wetness determination unit 30 determines whether the concrete curing mat 10 is in a dry state based on whether the output voltage Vout detected by the voltage detection unit 36 is less than the reference voltage Vr (step S16).
If the determination result in step S16 is negative, the process returns to step S16.
If the determination result in step S16 is affirmative, the display unit 32 is blinked by the warning unit 34 to display a warning about the dry state of the concrete curing mat 10 (step S18).
The worker who recognizes the warning display on the display unit 32 supplies water to the concrete curing mat 10 to bring the concrete curing mat 10 into a wet state (step S20).
When the concrete curing mat 10 is in a wet state and the output voltage Vout detected by the voltage detection unit 36 becomes equal to or higher than the reference voltage Vr, the wetness determination unit 30 determines that the concrete curing mat 10 is not in a dry state, As a result, the display section 32 is turned off by the warning section 34, the warning display is canceled (step S22), and the process returns to step S16.
By repeating such operations, the concrete 16 is effectively cured by the concrete curing mat 10 kept in a moist state, and the concrete 16 hardens and develops strength due to the hydration reaction of the concrete 16.

As explained above, according to the concrete curing mat 10 of the present embodiment, the pair of electrode wires 18 are covered with the insulating material 20 to form an elongated shape, and the pair of electrode wires 18 are formed into an elongated shape according to the wet state of the mat body 12. A moisture sensor 14 in which the capacitance generated between the wires 18 changes is incorporated inside the mat body 12.
Therefore, since the moisture sensor 14 is protected by the mat body 12, it is advantageous to improve the durability of the moisture sensor 14 even if the concrete curing mat 10 is used repeatedly.
Furthermore, since the humidity sensor 14 has the pair of electrode wires 18 covered with an insulator, deterioration of the pair of electrode wires 18 due to moisture can be suppressed, which is advantageous in improving the durability of the humidity sensor 14. Become.
In addition, when curing the concrete 16, it is only necessary to install the concrete curing mat 10 on the surface 1602 of the concrete 16 and supply water to the concrete curing mat 10, and there is no need to separately route the moisture sensor 14. This is advantageous in increasing the efficiency of the work required for curing.

Further, the concrete curing mat 10 of this embodiment has a constant width W and a length L perpendicular to the width W, and the moisture sensors 14 are arranged at intervals in the length L direction of the mat body 12. A plurality of first extending portions 22 extending over almost the entire length of the main body 12 in the width W direction, and a plurality of first extending portions 22 that are adjacent to each other in the longitudinal direction of the mat main body 12 at the ends of the mat main body 12 in the width W direction. The first extension part 22, which includes a plurality of connection extension parts 24 connecting the ends and is located at one end of the mat main body 12 in the length L direction, protrudes from the end of the mat main body 12 in the width W direction. However, the shape of the humidity sensor 14 incorporated inside the mat main body 12 is not limited to the embodiment and is arbitrary.
However, according to the present embodiment, the moisture sensor 14 is arranged evenly over the entire area of the mat body 12, which is advantageous in reliably determining whether or not the entire area of the mat body 12 is in a dry state. becomes.

Furthermore, the concrete moisture state monitoring device 26 of this embodiment measures a physical quantity that changes in accordance with the capacitance of the moisture sensor 14 built into the concrete curing mat 10, and based on the measured physical quantity, It is determined whether or not the mat main body 12 is in a dry state, and when it is determined that the mat main body 12 is in a dry state, a warning is displayed on the display section 32.
Therefore, the worker can easily and reliably grasp that the concrete curing mat 10 is in a dry state and perform the water supply work to the concrete curing mat 10, which helps to efficiently perform the curing work of the concrete 16. It is advantageous.

(Second embodiment)
Next, a concrete curing device 38 according to a second embodiment will be described with reference to FIG. 6.
In the following embodiments, the same parts and members as in the first embodiment are given the same reference numerals as in the first embodiment, and the explanation thereof will be omitted.
The concrete curing device 38 of the second embodiment is configured to automatically supply water using the concrete curing mat 10 of the first embodiment.

As shown in FIG. 6, the concrete curing device 38 includes a concrete curing mat 10, a physical quantity measuring section 28, a moisture determination section 30, a water supply control section 40, and a water supply section 42.
Since the concrete curing mat 10, the physical quantity measuring section 28, and the wetness determining section 30 are the same as those in the first embodiment, their explanations will be omitted.
The water supply section 42 supplies water to the concrete curing mat 10, and includes, for example, a conduit that supplies water from a water storage tank to the concrete curing mat 10, and a conduit provided at the end of the conduit to supply water to the concrete curing mat 10. It is configured to include a water sprinkling port for sprinkling water onto the mat 10, a solenoid valve provided in a conduit, and the like.
The water supply control section 40 is configured by a computer, and causes the water supply section 42 to supply water when the wetness determination section 30 determines that the mat main body 12 is in a dry state.
That is, when the wetness determining section 30 determines that the mat body 12 is in a dry state, the solenoid valve is opened for a certain period of time to supply water to the concrete curing mat 10. Further, if the wetness determining section 30 does not determine that the mat body 12 is in a dry state, the solenoid valve is closed to stop water supply to the concrete curing mat 10.

Next, a method of using the concrete curing device 38 will be explained with reference to the flowchart of FIG. 7.
Once the concrete 16 has been poured into the formwork, the concrete curing mat 10 is spread and placed on the upwardly facing surface 1602 of the concrete 16 so as to cover the entire surface 1602 (step S50).
Further, a water supply unit 42 is installed so that water can be supplied to the concrete curing mat 10 (step S52).
Next, one end of the humidity sensor 14 is connected to the voltage detection section 36 of the physical quantity measurement section 28, and the concrete curing device 38 is put into operation (step S54).
Next, water is supplied to the entire area of the concrete curing mat 10 (mat body 12) by the water supply unit 42, and the entire area of the concrete curing mat 10 is brought into a wet state so that the concrete 16 can be cured (step S56).

The wetness determination unit 30 determines whether the concrete curing mat 10 is in a dry state based on whether the output voltage Vout detected by the voltage detection unit 36 is less than the reference voltage Vr (step S58).
If the determination result in step S58 is negative, the process returns to step S58.
If the determination result in step S58 is affirmative, the water supply control unit 40 controls the water supply unit 42 to supply water to the concrete curing mat 10 for a certain period of time (step S60), and the process returns to step S58.
By repeating these operations, water is automatically supplied to the concrete curing mat 10, thereby maintaining the moist state of the concrete curing mat 10, and the concrete curing mat 10, which is kept moist, improves the effectiveness of the concrete 16. The hydration reaction of the concrete 16 causes the concrete 16 to harden and develop strength.

According to such a concrete curing device 38, water is automatically supplied to the concrete curing mat 10 when the concrete curing mat 10 becomes dry, so that the work of supplying water to the concrete curing mat 10 can be performed while saving manpower. This is advantageous in efficiently curing the concrete 16.

(Third embodiment)
Next, a concrete curing mat 10 according to a third embodiment will be described with reference to FIG. 8.
The first aspect of the third embodiment is that the mat main body 12 is divided into a plurality of areas A, and the moisture sensor 14 is installed separately and independently in each of the plurality of areas A. This is different from the embodiment of .
In the third embodiment, as shown in FIG. 6, the mat main body 12 has a constant width W and a length L perpendicular to this width.
The area A is set by dividing the mat main body 12 by a constant length ΔL.
In region A, the moisture sensor 14 includes a plurality of first extending portions 22 that are spaced apart in the length L direction of the mat body 12 and extend over almost the entire length in the width W direction of the mat body 12; The mat body 12 includes a plurality of connection extension parts 24 that connect the ends of adjacent first extension parts 22 in the longitudinal direction of the mat main body 12 at the ends in the W direction.
The first extending portion 22 located at one end of the mat main body 12 in the length L direction in the region A projects from the end of the mat main body 12 in the width W direction.

According to the concrete curing mat 10 of the third embodiment, it is possible to precisely determine whether each region A of the mat body 12 is in a dry state.
For example, in the case of a mat main body 12 with a width W of 1 m and a length L of 50 m, the wet state, that is, the amount of moisture contained in the mat main body 12 is not necessarily uniform over the entire length L direction, and the temperature and Due to the influence of wind conditions, the volume of the concrete 16 placed, etc., even if a certain area A remains moist, it is assumed that another area A may become dry.
In this case, if a single humidity sensor 14 is installed inside the mat main body 12, it is possible to determine whether or not the entire 50 m long mat main body 12 is in an average dry state. It is difficult to determine whether there is.
Therefore, if the concrete wet state monitoring device 26 described in the first embodiment is applied to each area A of the mat main body 12, the dry state is achieved based on the wet state of each area A of the mat main body 12. It is possible to give detailed warnings to area A, and to appropriately supply water to area A that has been determined to be in a dry state, which is advantageous in performing efficient and detailed curing work for concrete 16. .
Furthermore, if the concrete curing device 38 described in the second embodiment is applied to each area A of the mat main body 12, the area determined to be in a dry state based on the wet state of each area A of the mat main body 12 can be Water can be supplied to A in a precise manner, which is advantageous in efficiently and precisely curing the concrete 16 while saving manpower.

In the third embodiment, the mat body 12 having a constant width W and a length L perpendicular to this width is divided into a plurality of areas A by dividing the mat body 12 into each constant length ΔL. Although the case where the area A is set has been described, the setting of a plurality of areas A is arbitrary.
However, the present embodiment is advantageous in efficiently setting a plurality of regions A on the mat main body 12 having a constant width W and a length L perpendicular to this width.

Further, in the third embodiment, in the area A, the moisture sensor 14 includes a plurality of first extension parts 22 and a plurality of connection extension parts 24, and in the area A, the moisture sensor 14 is provided with a plurality of first extension parts 22 and a plurality of connection extension parts 24. The first extending portion 22 located at one end was assumed to protrude from the end of the mat main body 12 in the width W direction, but the shape of the humidity sensor 14 incorporated in each area A of the mat main body 12 differs from the actual shape. It is not limited to the form and is arbitrary.
However, according to the present embodiment, the humidity sensor 14 is arranged uniformly over the entire region A in each region A of the mat main body 12, so that it is possible to reliably detect whether or not each region A is in a dry state. This is advantageous in making decisions.

Furthermore, in the embodiment, a case has been described in which the concrete curing mat 10 is placed on the upwardly facing surface (top surface) 1602 of the concrete 16; ) may be placed on top of each other.

10 Concrete curing mat 12 Mat body 14 Moisture sensor 16 Concrete 1602 Surface 18 Electrode wire 20 Insulating material 22 First extension part 24 Connection extension part 26 Concrete moisture detection device 28 Physical quantity measurement part 2802 Input terminal 2804 DC power supply 2806 Fixed resistance 2808 Output terminal 30 Moisture determination section 32 Display section 34 Warning section 36 Voltage detection section 38 Concrete curing device 40 Water supply control section 42 Water supply section

Claims (7)

a mat body that is laid on the surface of poured concrete and maintains the concrete in a moist state;
A wetting device in which a pair of electrode wires are covered with an insulating material to form an elongated shape, and the capacitance generated between the pair of electrode wires changes depending on the wet state of the mat body by being incorporated inside the mat body. sensor and
A concrete curing mat characterized by comprising: The mat body has a constant width and a length perpendicular to the width,
The moisture sensor includes a plurality of first extending portions that are spaced apart in the length direction of the mat body and extend over substantially the entire length in the width direction of the mat body; a plurality of connection extension parts connecting end parts of the first extension parts adjacent in the longitudinal direction of the main body,
The first extending portion located at one end in the length direction of the mat main body projects from the end in the width direction of the mat main body.
The concrete curing mat according to claim 1, characterized in that: The mat main body is set divided into a plurality of regions,
The humidity sensor is incorporated separately and independently from each other in each of the plurality of regions.
The concrete curing mat according to claim 1, characterized in that: The mat body has a constant width and a length perpendicular to the width,
The area is set by dividing the mat main body by a certain length,
The concrete curing mat according to claim 3, characterized in that: In the region, the moisture sensor includes a plurality of first extending portions that are spaced apart in the length direction of the mat body and extend over almost the entire length in the width direction of the mat body, and an end in the width direction of the mat body. a plurality of connection extension parts connecting end parts of the first extension parts adjacent in the longitudinal direction of the mat main body in the mat body;
The first extending portion located at one end in the length direction of the mat main body in the region projects from the end in the width direction of the mat main body.
The concrete curing mat according to claim 4, characterized in that: A mat body that is laid on the surface of poured concrete and keeps the concrete in a moist state, and a pair of electrode wires covered with an insulating material to form an elongated shape, which is incorporated inside the mat body. a concrete curing mat having a humidity sensor that changes the capacitance generated between the pair of electrode wires depending on the humidity state of the main body;
a physical quantity measuring unit that measures a physical quantity that changes in response to the capacitance of the humidity sensor;
a wetness determination unit that determines whether the mat main body is in a dry state based on the physical quantity measured by the physical quantity measurement unit;
a warning unit for displaying a warning on a display unit when the wetness determining unit determines that the mat main body is in a dry state;
A concrete wet condition monitoring device comprising: A mat body that is laid on the surface of poured concrete and keeps the concrete in a moist state, and a pair of electrode wires covered with an insulating material to form an elongated shape, which is incorporated inside the mat body. a concrete curing mat having a humidity sensor that changes the capacitance generated between the pair of electrode wires depending on the humidity state of the main body;
a water supply section that supplies water to the mat main body;
a physical quantity measuring unit that measures a physical quantity that changes in response to the capacitance of the humidity sensor;
a wetness determination unit that determines whether the mat main body is in a dry state based on the physical quantity measured by the physical quantity measurement unit;
a water supply control unit that causes the water supply unit to supply water when the moisture determination unit determines that the mat main body is in a dry state;
A concrete curing device characterized by comprising:

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