Effective material age estimation device, compression strength estimation device and program

Abstract

The present invention provides an effective material age estimation device that can appropriately consider changes in relative humidity when estimating the effective material age. The effective material age estimation device includes: a temperature term calculation unit 13 that calculates a temperature term γ depending on the temperature of the cast concrete T ; a humidity term calculation unit 14 that calculates a humidity term γ depending on the relative humidity of the concrete RH , and an effective material age calculation unit 15 that calculates the effective material age of the concrete by adding the products of the temperature term γ T , the humidity term, and a time term Δt i . The humidity term γ RH is introduced and used to weight the sum of the products.

Description

Technical Field

[0001] The present invention relates to an effective age estimator and related technology for estimating the effective age and compressive strength of cast-in-place concrete, in which not only a temperature term but also a humidity term is set so as to enable accurate estimation. Background Art

[0002] For example, as described in Reference 2 (Japanese Patent No. 6,553,347), Reference 3 (Japanese Patent Laid-Open No. 11-271301), Reference 4 (Japanese Patent Laid-Open No. 2003-279512), and Reference 5 (Japanese Patent Laid-Open No. 2011-256061), in order to estimate the effective material age of cast concrete, it is known in the prior art to convert the temperature term γ into T and the step time term Δt i Add the products of .

[0003] However, in the prior art described in detail below, the strong influence of relative humidity in the strength increase process of cast concrete, especially in its early curing process, is ignored. As a result, according to the prior art, the effective material age is overestimated and it is difficult to make a proper estimate. In addition, the prior art has a serious defect because the prior art estimates the effective material age to the side opposite to the safe side.

[0004] Reference 1: Patent No. 6050046

[0005] Reference 2: Patent No. 6553347

[0006] Reference 3: Japanese Patent Publication No. 11-271301

[0007] Reference 4: Japanese Patent Application Publication No. 2003-279512

[0008] Reference 5: Japanese Patent Application Publication No. 2011-256061 Summary of the invention

[0009] In view of the above circumstances, an object of the present invention is to provide an effective material age estimation device and a compressive strength estimation device, both of which can appropriately reflect the change in relative humidity in the estimation of the effective material age and the compressive strength.

[0010] A first aspect of the present invention provides an effective material age estimation device, comprising: a temperature term calculation unit for calculating a temperature term that depends on the temperature of cast concrete; a humidity term calculation unit for calculating a humidity term that depends on the relative humidity of cast concrete; and an effective material age calculation unit for adding the product of the temperature term, the humidity term and the step time term to calculate the effective material age of cast concrete.

[0011] According to this structure, instead of the single product of the temperature term and the step time term, the quadratic product of the temperature term, the humidity term and the step time term is added. In short, the second product is weighted by the humidity term. For example, if the value of the humidity is zero, the second product of the current step time must have a zero value, regardless of the value of the temperature term. In this way, the change in relative humidity has a proper effect on the calculated effective material age. In addition, the humidity term acts in the direction that the calculated effective material age is underestimated. In other words, this structure can avoid the above-mentioned overestimation that is inevitable according to the prior art.

[0012] In addition to the first aspect of the present invention, the second aspect of the present invention provides an effective material age estimation device, further comprising a temperature / humidity sensor for measuring the temperature of the cast concrete and the relative humidity of the cast concrete.

[0013] This structure enables actual measurement of the temperature and relative humidity of the poured concrete so that appropriate calculations can be made based on the actual measured values.

[0014] In addition to the first aspect of the present invention, a third aspect of the present invention provides an effective material age estimation apparatus, further comprising a cast concrete detection sensor operable to detect the presence of cast concrete.

[0015] According to this structure, the calculation of the effective material age can be stopped until the cast concrete detection sensor detects the presence of cast concrete. The device can be used reliably with a reasonable formula. In particular, wasteful power consumption of the device can be suppressed.

[0016] In addition to the first aspect of the present invention, the fourth aspect of the present invention provides an effective material age estimation device, wherein: a predetermined threshold relative to relative humidity is set to be less than 100% and greater than 0%; when the relative humidity is 100%, the humidity term reaches a positive maximum value; the humidity term decreases within a first range where the relative humidity is less than 100% and not less than the predetermined threshold; and the humidity term asymptotically approaches 0% within a second range where the relative humidity is less than the predetermined threshold.

[0017] This structure allows the moisture term to be set with a formula that matches the entity.

[0018] In addition to the fourth aspect of the present invention, a fifth aspect of the present invention provides an efficient material age estimation apparatus, wherein the moisture term is set to zero within the second range.

[0019] According to this structure, the product always has a zero value in the second range regardless of the value of the temperature term. Overestimation of the effective material age can be appropriately avoided.

[0020] Here, in the first to fourth aspects of the present invention, a fifth aspect of the present invention provides that calculation is performed as follows.

[0021] That is, the temperature term γ related to the temperature T℃ T Preferably, it is calculated according to formula 1:

[0022] [Formula 1]

[0023]

[0024] The humidity term γ depends on the relative humidity in RH% RH Preferably, it is calculated according to Formula 2:

[0025] [Formula 2]

[0026] γ RH =exp{-0.8484(100-RH)}

[0027] Depends on the step time term Δt i Effective material age t e Preferably, it is calculated according to Formula 3:

[0028] [Formula 3]

[0029]

[0030] According to this structure, the temperature term γ T and humidity term γ RH By setting an appropriate exponential function, the effective material age can be properly estimated.

[0031] In addition to the first aspect of the present invention, a sixth aspect of the present invention provides an effective material age estimation device, wherein the effective material age calculation unit omits summing the products of the temperature term, the humidity term and the time term when the relative humidity is less than a predetermined threshold.

[0032] According to this structure, when it is known that the product is almost completely zero, wasteful summation calculation is omitted. It is ensured that the equipment is used with a reasonable formula. In particular, wasteful power consumption can be suppressed.

[0033] In addition to the first aspect of the present invention, a seventh aspect of the present invention provides an effective material age estimation apparatus, wherein the predetermined threshold value is set to a relative humidity from 80% to 95%.

[0034] This structure enables setting a predetermined threshold in a formula that matches the entity.

[0035] In addition to the effective material age estimation device according to the first aspect of the present invention, an eighth aspect of the present invention provides a compressive strength estimation device including a compressive strength calculation unit operable to calculate the compressive strength of cast concrete based on the effective material age.

[0036] In addition to the eighth aspect of the present invention, the ninth aspect of the present invention further provides a compressive strength estimation device, characterized in that the compressive strength is calculated according to at least one of the following [Formula 4] and [Formula 5].

[0037] Depends on constant s, setting time t s and the nominal strength of the poured concrete f c28 [Formula 4] is preferably:

[0038] [Formula 4]

[0039]

[0040] Or [Formula 5] depending on constants "a" and "b" is preferably:

[0041] [Formula 5]

[0042] f Ct ={t e / (a+bt e )}·f c28

[0043] Here, the constant s is calculated based on the value described in the Mill Test Report, etc. Solidification time t s and nominal strength f c28 They have known values ​​recorded in the mill test report. For example, constant a=4.0, constant b=0.85 (Formula 5).

[0044] According to this structure, the compressive strength is calculated by an appropriate exponential function, so that the compressive strength can be estimated with high accuracy.

[0045] According to the present invention, a humidity term is introduced as described above to be added to the object of the product. In other words, the value of the product is weighted using the humidity term. In this way, the influence of relative humidity can properly affect the calculated effective material age. The overestimation of the dangerous side that is inevitable according to the prior art can properly be avoided.

[0046] In short, the effective material age obtained according to the present invention is estimated to be on the safe side and must be said to have high reliability. In addition, since the estimated compressive strength is also based on the estimated effective material age with high reliability, the reliability of the estimated compressive strength is also improved by the same formula. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 It is a curve chart of the change of hydration rate.

[0048] Figure 2 It is a block diagram showing the compressive strength estimating device according to the first embodiment of the present invention.

[0049] Figure 3 It is a flow chart of the compressive strength estimating device according to the first embodiment of the present invention.

[0050] Figure 4 This is a flow chart of the compressive strength estimating device according to the second embodiment of the present invention.

[0051] Figure 5 It is a block diagram showing a configuration example of a compressive strength estimation device according to the first embodiment and the second embodiment of the present invention.

[0052] Explanation of symbols

[0053] 1, 2: Template

[0054] 3: Concrete

[0055] 10: Control unit

[0056] 11: Parameter storage unit

[0057] 12: Result storage unit

[0058] 13: Temperature calculation unit

[0059] 14: Humidity item calculation unit

[0060] 15: Effective material age calculation unit

[0061] 16: Compressive strength calculation unit

[0062] 20: Bus

[0063] 21: CPU

[0064] 22: Read-only memory

[0065] 23: Memory

[0066] 24: Keyboard

[0067] 25: Display

[0068] 26: Interface

[0069] 27: Disk drive

[0070] 28: Recording Media

[0071] 29: Internet Network

[0072] S1: Cast concrete detection sensor

[0073] S2: Temperature and humidity sensor

[0074] D: Concrete pouring detection signal

[0075] T: Temperature signal

[0076] RH: Relative humidity signal DETAILED DESCRIPTION

[0077] Before explaining the embodiments in detail, important concepts regarding the present invention will now be described.

[0078] (1)Relative humidity (RH)

[0079] Relative humidity refers to the ratio of water vapor partial pressure to saturated vapor pressure at the same temperature T, usually expressed as a percentage (%).

[0080] If "e" is the water vapor partial pressure and "es(T)" is the saturated vapor pressure at the same temperature T, the relative humidity RH(%) is expressed as RH=(e / es(T))*100(%).

[0081] (2) Specific resistance

[0082] Specific resistivity has the same meaning as resistivity and / or resistivity and is a material property that indicates the resistance of a material to the intensity of an electric current. The unit is [Ω·m]

[0083] (3) Temperature term of effective material age γ T

[0084] Temperature term of effective material age γ T reflects the acceleration and / or retardation of the reaction rate caused by temperature to the material age. Assume that the reference reaction rate is the reaction rate of concrete at 20°C and further assume that its activation energy is 4000. Here, the temperature term γ with respect to the effective material age is T Can be controlled by temperature T℃.

[0085] (4) Humidity term of effective material age γ RH

[0086] The humidity term is a term that depends on the relative humidity RH%. As described in the related art description, in the prior art, it is assumed that the relative humidity is always 100%, and the humidity term has been excluded from consideration. However, in an actual construction site, the formwork is removed, the surface of the poured concrete is exposed to the outside, and water vapor is released from the surface into the air. In this way, the relative humidity is often less than 100%.

[0087] Figure 1 This is a graph showing changes in the hydration rate (dimensionless quantity 0.0 to 1.0) on the vertical axis relative to the relative humidity % (0 to 100%) on the horizontal axis.

[0088] like Figure 1 As shown, when the relative humidity is 100%, the hydration rate reaches a maximum value of 1.0. On the contrary, when the relative humidity is less than 80%, the hydration rate is almost zero, and it can be said that the hydration reaction is almost stopped.

[0089] Therefore, when only the temperature term is considered as the prior art, the effective material age is estimated to the opposite side of the safe side, especially if the relative humidity RH is less than 100%. In other words, it can be said that the prior art overestimates the effective material age to the dangerous side, and thus the prior art has a serious defect in this regard. More specifically, in this embodiment, the humidity term is calculated according to [Formula 2].

[0090] In this embodiment, as described later, the temperature and humidity sensor S2 (see Figure 2 ) Direct determination of relative humidity RH%. However, the humidity term related to the present invention in this specification has a broader meaning than generally recognized and is not limited to the meaning based on direct measurement of relative humidity.

[0091] For example, it will be apparent to one skilled in the art that a 4-terminal instrument can be used to obtain the resistivity (see above for its definition.) and a humidity term that depends on the resistivity can be used. Otherwise, another humidity term that depends on the obtained water content can be used to obtain the water content. In short, it is sufficient that the humidity term depends directly or indirectly on the humidity.

[0092] (5) Age of effective materials

[0093] In this embodiment, based on the temperature term γ calculated as described above T and humidity term γ RH Calculate the effective material age according to [Formula 3].

[0094] (6) Compressive strength

[0095] Furthermore, in the present embodiment, based on the effective material age calculated as described above, the compressive strength is calculated according to at least one of [Formula 4] and [Formula 5].

[0096] Next, embodiments of the present invention will be described with reference to the drawings.

[0097] Example 1

[0098] Figure 2 is a block diagram showing a compressive strength estimating device according to a first embodiment of the present invention. Figure 3 Flowchart of the compressive strength estimating device.

[0099] like Figure 2 As shown, this example deals with the first case where concrete is poured to construct vertically erected parts such as walls and / or columns. However, as will be apparent to a person skilled in the art, the invention can also be applied to the second case where horizontal panels constituting ceilings and / or floors are constructed.

[0100] like Figure 2 As shown, in this example, a pair of first formwork 1 and second formwork 2 are held to stand opposite to each other with a fixed space. Since the wood structure, reinforcing member and / or the like are irrelevant / unrelated to the essence of the present invention, illustration thereof is omitted.

[0101] In this embodiment, since a pair of first templates 1 and second templates 2 are vertically erected, concrete 3 is poured downward from the upper side. In the current state, the first level L1 is equal to the top surface of the poured concrete 3. The poured concrete detection sensor S1 and the temperature and humidity sensor S2 are set at a predetermined level of the second template 2.

[0102] exist Figure 2 Although the pouring concrete detection sensor S1 is shown as being higher than the temperature / humidity sensor S2, this arrangement is only for ease of explanation. It is preferred that the pouring concrete detection sensor S1 and the temperature / humidity sensor S2 are arranged on the same horizontal plane.

[0103] Here, the pouring concrete detection sensor S1 detects whether the pouring concrete exists near the pouring concrete detection sensor S1. The sensor using electrostatic capacitance proposed by the inventor in reference 1 (Patent No. 6050046) can be preferably used as the pouring concrete detection sensor S1. Here, when the upper surface of the pouring concrete 3 exists near the pouring concrete detection sensor S1, the pouring concrete 3 is detected. Figure 2 When the pouring concrete detection sensor S1 detects the pouring concrete, the pouring concrete detection signal is OFF. Figure 2 At the second layer L2 shown by the middle dotted line, the pouring concrete detection sensor S1 detects pouring concrete to turn on the pouring concrete detection signal.

[0104] The temperature / humidity sensor S2 measures the temperature and relative humidity of the cast concrete 3. Also, it is preferable to use a sensor protected by a special film that allows moisture to pass through and does not allow water to pass through. Of course, since the temperature / humidity sensor S2 can be composed of a temperature sensor and a humidity sensor that are configured separately from each other.

[0105] like Figure 2 As shown, the temperature / humidity sensor S2 can be connected to the second template 2, can be installed on the cast concrete 3, or can be embedded in the cast concrete 3. In the cast concrete 3, it is preferably embedded in the surface portion near the outer side of the reinforcement (not shown) (covering the inner side of the concrete). Regardless of its configuration, the temperature and humidity sensor S2 outputs a measured temperature signal T and a measured relative humidity signal RH after the cast concrete detection signal D is ON.

[0106] exist Figure 2The portion of the blocks shown that does not include the compressive strength calculation unit 16 corresponds to the effective material age estimation device according to this embodiment of the present invention. If the compressive strength calculation unit 16 is added to this portion, the compressive strength estimation device of this embodiment of the present invention is constituted as a whole.

[0107] Hereinafter, each component will now be described. First, the control unit 10 is composed of a processor, memory, etc. (not shown), and controls the entire compressive strength estimation device. The control unit 10 inputs a pouring concrete detection signal D from the pouring concrete detection sensor S1, and inputs a temperature signal T and a relative humidity signal RH from the temperature and humidity sensor S2.

[0108] The parameter storage unit 11 is composed of a memory (not shown) and stores various parameters required for the calculation process. In particular, the parameter storage unit 11 stores the constant s, the coagulation time t s , nominal strength of concrete f c28 , step time term Δt i wait.

[0109] The result storage unit 12 is composed of a memory (not shown) and stores various values ​​obtained by the calculation process. In particular, the result storage unit 12 stores the counter value i, the process number value N, the effective material age t e , compressive strength f ct wait.

[0110] The temperature term calculation unit 13 , the humidity term calculation unit 14 , the effective material age calculation unit 15 , and the compressive strength calculation unit 16 are modules that perform respective calculations in accordance with instructions from the control unit 10 .

[0111] Here, it is needless to say that each "calculation unit" in the specification includes a unit that performs direct calculation according to a formula by an independent variable. However, in addition to this form of formula, the "calculation unit" may have one of various form formulas other than this, may have a table with an independent variable as an index, and may determine the intermediate value ratio distribution between two indexes by determining the output value according to the following formula.

[0112] The temperature term calculation unit 13 receives the temperature signal T from the control unit 10 and performs calculation according to [Formula 1].

[0113] The humidity term calculation unit 14 inputs the relative humidity signal RH from the control unit 10 and performs calculation according to [Formula 2].

[0114] The effective material age calculation unit 15 inputs the temperature term γ from the temperature term calculation unit 13. T , the humidity term γ is input from the humidity term calculation unit 14 RH , input the time term Δt from the parameter storage unit 11 i, and the products of the input items are added according to [Formula 3] to store the calculation results in the result storage unit 12.

[0115] The compressive strength calculation unit 16 inputs the effective material age from the effective material age calculation unit 15, and inputs the constant s and the solidification time t from the parameter storage unit 11. s , nominal strength of concrete f c28 Etc., and calculate the compressive strength according to at least one of the following: [Formula 4] and [Formula 5] and store the calculation results in the result storage unit 12.

[0116] Next, refer to Figure 3 , the processing flow of embodiment 1 is described. First, in step 1, the control unit 10 waits for the pouring concrete detection signal D to be ON. As long as the control unit 10 waits, each calculation unit 13-16 will not operate to prevent wasteful power consumption.

[0117] When poured concrete exists Figure 2 When the concrete is poured to the first level L1, the pouring concrete detection signal D is OFF, and the control unit 10 keeps waiting. Afterwards, when the concrete is poured continuously to the second level L2, the pouring concrete detection signal D is turned on, and the control unit 10 moves the current process to step 2.

[0118] In step 2, the control unit 10 sets the step time term Δt i and the number N to store them in the parameter storage unit 11. The curing time may be different (e.g., 3 days, 7 days, 28 days, etc.) according to the part where the concrete 3 is poured. i It is appropriate to set it to about 1 hour so that the daily temperature changes are reflected in the calculation results. Needless to say, the step time term Δt i Can be set more finely to improve calculation accuracy.

[0119] Next, in step 3, i is reset to zero, and the current process moves to step 4. In step 4, the control unit 10 compares the counter i with the number N. If the counter i exceeds the number N, the control unit 10 performs post-processing (e.g., writing various values ​​stored on the result storage unit 12 to an external storage medium, a predetermined Internet website, etc.), and then the process will end.

[0120] Next, in step 4, if the counter i is not greater than the number N, the control unit 10 increments the counter i and instructs the temperature item calculation unit 13 and the humidity item calculation unit 14 to perform calculations respectively.

[0121] In step 7, the temperature term calculation unit 13 converts the temperature term γ T Output, the humidity term calculation unit 14 converts the humidity term γ RHThey are respectively output to the effective material age calculation unit 15. The effective material age calculation unit 15 obtains the effective material age to store it in the result storage unit 12, and outputs it to the compressive strength calculation unit 16.

[0122] In step 8 , the compressive strength calculation unit 16 obtains the compressive strength and stores it in the result storage unit 12 (step 9 ), and the current process returns to step 4 .

[0123] In step 4, the control unit 10 makes a judgment using the same formula as above, and repeats the processing from step 5 to step 9 as long as the current processing has not moved to step 10.

[0124] Example 2

[0125] In Embodiment 1 described above, the summing of products is repeated regardless of the contents of the humidity items. In contrast, in Embodiment 2 described below, a predetermined threshold value TH is newly introduced to perform more rational processing.

[0126] refer to Figure 1 It can be understood that the predetermined threshold TH should be set to be less than 100% and greater than 0%.

[0127] like Figure 1 As shown, the hydration rate reaches a positive maximum value of 1.0 when the relative humidity is 100%, decreases within a first range where the relative humidity is less than 100% and not less than a predetermined threshold TH, and asymptotically approaches 0% within a second range where the relative humidity is less than the predetermined threshold TH.

[0128] In view of the above, it may be appropriate to set the predetermined threshold TH within the range from 80% to 95%.

[0129] Furthermore, if the humidity term is set to zero in the second range of relative humidity from 0% to the predetermined threshold TH, sufficient accuracy for practical use can be expected. The process can be simpler because no matter the temperature term γ T The value of the product is always zero regardless of the value of . Furthermore, to make the processing simpler, it is sufficient to linearly approximate the first range from 100% relative humidity to a predetermined threshold value TH, in which case it is preferred to use a straight line through a. The point where the relative humidity is 100% and the humidity term is 1.0 (100%) is closer to Figure 1 It is more preferable to set the straight line so that the humidity term is less than Figure 1 This is because the value of the product is therefore set on the safer side. The linear approximation can be performed by the least squares method which is obvious to those skilled in the art.

[0130] A basic concept is as described above. In Embodiment 2, which is different from Embodiment 1, the predetermined threshold TH is set in the range from 80% to 95% (more preferably, TH=90%). When the relative humidity is less than the predetermined threshold TH, the temperature term γ is omitted. T , humidity term γ RH and the time term Δt i The sum of the products of .

[0131] More specifically, if Figure 4 As shown, in Figure 3 Step 11 is inserted between step 5 and step 6. In step 11, the control unit 10 compares the relative humidity signal RH with a predetermined threshold value TH. When the relative humidity signal RH is less than the predetermined threshold value TH, the control unit 10 omits the process from step 6 to step 9 and returns the current process to step 4.

[0132] When products are added, the added product value is zero or very close to zero, so it can be said that the addition is not so useful. In Embodiment 2, considering this point, the less useful processing is omitted. This reasonable arrangement can save power consumption.

[0133] Points other than the above are similar to those in Embodiment 1.

[0134] Figure 5 1 is a block diagram showing a structural example of a compressive strength estimation device of Embodiment 1 and Embodiment 2 of the present invention. In Embodiment 1 and Embodiment 2, the compressive strength estimation device can be configured as follows. Needless to say, the following description is only an example, and changes and / or modifications can be applied thereto as long as it is obvious to those skilled in the art.

[0135] A CPU 21, a ROM 22, a RAM 23, a keyboard 24, and a display 25 are connected to the bus 20. In addition, a pouring concrete detection sensor S1, a temperature / humidity sensor S2, a disk drive 27, and the Internet 29 are connected to the bus 20 through an interface 26.

[0136] The recording medium 28 is detachably provided on the disk drive 28, and the recording medium 28 stores Figure 3 and / or Figure 4 Flowchart of the procedure.

[0137] The parameter storage unit 11 and the result storage unit 12 are implemented by the RAM 23. The CPU 21 executes the program stored on the recording medium 28, thereby respectively implementing the execution control unit 10, the temperature item calculation unit 13, the humidity item calculation unit 13, and effectively respectively implementing the material age calculation unit 15 and the compressive strength calculation unit 16.

Claims

1. An effective material age estimation device, characterized in that: include: A temperature term calculation unit for calculating a temperature term that depends on the temperature of the poured concrete; A moisture term calculation unit for calculating a moisture term that depends on the relative humidity of the poured concrete; and an effective material age calculation unit, for adding the product of the temperature term, the humidity term and the step time term to calculate the effective material age of the cast concrete, The temperature term depends on the temperature of T℃ and is calculated according to [Formula 1]: [Formula 1] Humidity term γ RH The relative humidity % depending on RH is calculated according to [Formula 2]: [Formula 2] γ RH = exp{-0.8484(100-RH)}; and Depends on the step time term △t i Effective material age t e Calculate according to [Formula 3]: [Formula 3] 2. The effective material age estimation device according to claim 1, characterized in that: A temperature / humidity sensor is also included for measuring the temperature of the poured concrete and the relative humidity of the poured concrete.

3. The effective material age estimation device according to claim 1, characterized in that: The invention further comprises a poured concrete detection sensor for detecting whether the poured concrete exists.

4. The effective material age estimation device according to any one of claims 1 to 3, characterized in that: The predetermined threshold value regarding the relative humidity is set to be less than 100% and greater than 0%; When the relative humidity is 100%, the humidity term reaches a positive maximum value; The humidity item decreases within a first range where the relative humidity is less than 100% and not less than the predetermined threshold; and The humidity item gradually approaches 0% within a second range in which the relative humidity is less than the predetermined threshold.

5. The effective material age estimation device according to claim 4, characterized in that: The humidity term is set to zero within the second range.

6. The effective material age estimation device according to claim 4, characterized in that: The predetermined threshold is set to a relative humidity of 80% to 95%.

7. The effective material age estimation device according to claim 4, characterized in that: The effective material age calculation unit omits summing the product of the temperature term, the humidity term, and the step time term when the relative humidity is less than the predetermined threshold.

8. A compressive strength estimation device, characterized in that: include: The effective material age estimation device according to any one of claims 1 to 7; and A compressive strength calculation unit for calculating the compressive strength of cast concrete according to the effective material age calculated by the effective material age calculation unit of the effective material age estimation device according to claim 1.

9. The compressive strength estimation device according to claim 8, characterized in that: The compressive strength is calculated according to at least one of the following [Formula 4] and [Formula 5]; Depends on the constant s of poured concrete and the setting time t s and nominal strength f c28 The [Formula 4] is: [Formula 4] ;and [Formula 5] which depends on constants "a" and "b" is: [Formula 5] f Ct ={t e / (a+bt e )}·f c28 。 10. A program product for causing a computer to operate as a device, characterized in that The program offerings include: A temperature term calculation unit for calculating a temperature term that depends on the temperature of the poured concrete; a moisture term calculation unit for calculating a moisture term depending on the relative humidity of the poured concrete; and an effective material age calculation unit operable to sum the product of the temperature term, the humidity term and the step time term to calculate the effective material age of the cast concrete, The temperature term depends on the temperature of T℃ and is calculated according to [Formula 1]: [Formula 1] Humidity term γ RH The relative humidity % depending on RH is calculated according to [Formula 2]: [Formula 2] c RH =exp{-0.8484(100-RH)} and Depends on the step time term △t i Effective material age t e Calculate according to [Formula 3]: [Formula 3] 11. The program product according to claim 10, characterized in that The program product further includes a compressive strength calculation unit operable to calculate the compressive strength of the cast concrete based on the effective material age calculated by the effective material age calculation unit of the program product of claim 10 .

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