Calculation method and system for compressive strength of compressed pouring concrete

Abstract

The invention belongs to the field of civil engineering materials, and particularly provides a method and system for calculating compressive strength of compressed pouring concrete.The method comprises the steps that 1, the compressive strength of common concrete under the same water-cement ratio after standard curing for 28 days is calculated according to JGJ 55-2011 Common Concrete Mix Proportion Design Regulations; 2, the water cement ratio, the compression stress and the compression time are used for calculating the compression pouring strength improvement coefficient; 3, calculating the compressive strength of the CCC by using the compressive strength of the NC and the compression pouring strength improvement coefficient; on the basis of an existing common concrete compressive strength model, a strength improvement coefficient is introduced to represent strength improvement caused by a compression behavior in the compression pouring process, and the compression pouring concrete compressive strength design method is obtained.

Description

Technical Field

[0001] This invention relates to the field of civil engineering materials, and in particular to a method and system for calculating the compressive strength of compressed concrete. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] Compressed concrete is a high-performance concrete material. It increases the density of fresh concrete by applying pressure to squeeze out air and excess water, resulting in higher strength, better durability, lower cost, and less carbon emissions.

[0004] Unlike ordinary concrete, the compressive strength of compression-cast concrete no longer follows the traditional compressive strength design method based on the water-cement ratio. Therefore, some calculation methods for the compressive strength of compression-cast concrete are disclosed in the prior art, as follows: Patent CN121167852A discloses a method for calculating the compressive strength of concrete considering both strain rate and size effects. This method derives a formula for calculating the compressive strength of concrete that simultaneously considers both size and strain rate effects, starting from the size effect and strain rate effect formulas for concrete compressive strength. The formula includes a constant term, a strain rate effect term, a size effect term, and an interaction term. The constant term reflects the static strength of a 150mm cubic concrete specimen; the strain rate effect term reflects the increase in strength due to increased strain rate; the size effect term reflects the decrease in strength due to increased specimen size; and the interaction term reflects the increase in strain rate effect due to increased size and the decrease in size effect due to increased strain rate. Finally, a multiple regression method is used to fit all experimental data to obtain the parameters for the above-mentioned terms of concrete compressive strength. Analysis shows that the given formula has a good fit and small regression residuals, verifying the applicability of the strain rate and size effect formulas for concrete compressive strength.

[0005] Patent CN113702223A discloses a method and system for testing the compressive strength of concrete components based on the rebound method. The method includes measuring high-strength and medium-strength rebound values ​​at rebound test points within multiple rebound test zones on the concrete component; calculating the high-strength average rebound value and the medium-strength average rebound value, as well as the high-strength rebound distribution aggregation index and the medium-strength rebound distribution aggregation index, based on the high-strength and medium-strength rebound values ​​of all rebound test points within the target test area; optimizing the high-strength and medium-strength average rebound values ​​and calculating the compressive strength value of the concrete component. By calculating the high-strength and medium-strength rebound distribution aggregation indices corresponding to the high-strength and medium-strength rebound values, the high-strength and medium-strength average rebound values ​​are optimized, making the final high-strength and medium-strength average rebound values ​​more representative of the compressive strength of the concrete component, thus obtaining more accurate test results.

[0006] Furthermore, existing technologies also disclose methods for calculating the compressive strength of compressed concrete using the volumetric compressibility coefficient; calculating the compressive strength of ordinary concrete after 28 days of standard curing at the same water-cement ratio; and calculating the volumetric compressibility coefficient. The volume compressibility coefficient is used to represent the increase in compressive strength caused by compression casting, and a transition model is obtained. The transition model is further modified using the water-cement ratio to obtain a design method for the compressive strength of compression-cast concrete based on the volume compressibility coefficient. However, the above-mentioned methods for calculating and testing compressive strength have the following problems: First, the above-mentioned method for calculating the compressive strength of concrete, which considers strain rate and size effects, has limitations in calculating the compressive strength of concrete. The soil compressive strength calculation considers the strain rate during axial compression and the dimensions of the concrete itself, and is applicable to ordinary concrete with different loading rates and dimensions. Compression-cast concrete, on the other hand, involves pressurizing the flowing concrete mixture during pouring (before it hardens) to expel air and excess moisture, making the concrete more compact. However, the strain rate during axial compression and the dimensions of the concrete itself do not accurately reflect the characteristics of compression-cast concrete. Therefore, the concrete compressive strength calculation method considering strain rate and size effects is not applicable to compression-cast concrete.

[0007] Secondly, the method for testing the compressive strength of concrete members based on the rebound method belongs to the concrete structure operation stage. Methods for testing the compressive strength of soil. The rebound method for testing the compressive strength of concrete members cannot provide the compressive strength of concrete during the concrete mix design stage; therefore, this method cannot be used to predict the compressive strength of compressed concrete.

[0008] Third, the method of using the volumetric compressibility coefficient to calculate the compressive strength of compressed concrete has a problem: this invention has limitations in measurement... A new parameter, the volumetric compressibility coefficient, was introduced during the compression process. This parameter was measured by measuring the height of the specimen during compression, which is relatively complicated to implement. Summary of the Invention

[0009] To address the aforementioned issues, this invention proposes a method for designing the compressive strength of compressible concrete based on the theory of ordinary concrete strength prediction. Building upon existing models for the compressive strength of ordinary concrete, this invention introduces two parameters—the compression-enhancing coefficient and the water-cement ratio of ordinary concrete—to consider the strength increase resulting from compression behavior during the compression-enhancing process, ultimately yielding a method for designing the compressive strength of compressible concrete.

[0010] To achieve the above objectives, the present invention adopts the following technical solution: In a first aspect, the present invention proposes a method for calculating the compressive strength of compressed concrete, comprising the following steps: Step 1: Obtain the compressive strength of ordinary concrete after standard curing time at the same water-cement ratio. ; Step 2: Obtain the compression casting strength enhancement coefficient ,in:

[0011] In the formula: For regression coefficients, To take compressive stress into account p and compression time T The strength enhancement coefficient; This indicates the water-cement ratio of ordinary concrete under the same water-cement ratio in step 1; Step 3, based on the compressive strength and the coefficient of performance enhancement of compression casting strength Calculate the compressive strength of compressed concrete. .

[0012] This invention uses only the compressive strength and water-cement ratio of ordinary concrete with the same mix proportion when predicting the strength of compressed concrete. It considers fewer parameters, is easier to implement, does not require additional steps during the pouring process, and has lower costs.

[0013] Secondly, the present invention also provides a system for calculating the compressive strength of compressed concrete, comprising: The first module is configured to obtain the compressive strength of ordinary concrete after a set curing time at the same water-cement ratio. ; The second module is configured to obtain the compression casting strength enhancement coefficient. ,in:

[0014] In the formula: For regression coefficients, To take compressive stress into account p and compression time T The strength enhancement coefficient; This indicates the water-cement ratio of ordinary concrete under the same water-cement ratio in step 1; The third module is configured to be based on the compressive strength. and the coefficient of performance enhancement of compression casting strength Calculate the compressive strength of compressed concrete. .

[0015] As a further technical solution, in the aforementioned calculation method and calculation system, the... The calculation method is as follows: (1) In the formula: The compressive strength of ordinary concrete after 28 days of standard curing at the same water-cement ratio is expressed in MPa. The compressive strength of the cementitious material mortar after 28 days is expressed in MPa. This indicates the water-cement ratio of the concrete; and These are empirical coefficients related to the type of coarse aggregate; for crushed stone, they are 0.53 and 0.49, and for gravel, they are 0.49 and 0.13.

[0016] As a further technical solution, in the aforementioned calculation method and calculation system, the... The value range is 18 ~ 40 MPa; the water-cement ratio value is... Range 0.4 ~ 0.7.

[0017] As a further technical solution, the regression coefficients related to the water-cement ratio in the aforementioned calculation method and system... and The values ​​are -1.090 and 1.970 respectively.

[0018] As a further technical solution, the compressive strength mentioned in the calculation method and calculation system... The calculation method is as follows: .

[0019] Thirdly, the present invention also provides a computing device, including: a processor and a memory storing a computer program, wherein the computer program, when run by the processor, executes the aforementioned method for calculating the compressive strength of compressed concrete.

[0020] Fourthly, the present invention also provides a computer-readable storage medium storing instructions that, when executed on a computer, cause the computer to perform the aforementioned method for calculating the compressive strength of compressed concrete.

[0021] Compared with the prior art, the beneficial effects of the present invention are: This invention introduces the concept of a strength enhancement coefficient in the design method for the compressive strength of compressed concrete. This coefficient comprehensively considers the effects of compressive stress and compression time on the enhancement of concrete compressive strength, as well as the water-cement ratio. The strength enhancement coefficient for compressed concrete is calculated using the water-cement ratio, compressive stress, and compression time. Compared to existing models, this invention can more accurately predict and calculate the compressive strength of compressed concrete. Compared to existing calculation methods, this invention addresses the differences between compressed concrete and ordinary concrete, and compared to methods that consider strain rate and size effects in concrete compressive strength calculation, it can more accurately predict the compressive strength of compressed concrete. This invention can accurately predict the compressive strength of compressed concrete at the mix design stage, and compared to methods based on the rebound method for testing the compressive strength of concrete components, it can better guide the design of compressed concrete components. This invention relies on fewer parameters, and compared to methods that use volume compressibility coefficients to calculate the compressive strength of compressed concrete, it is simpler and easier to implement, requires no additional measurement parameters, and is less costly. Attached Figure Description

[0022] Figure 1 A flowchart illustrating the calculation process for the compressive strength design method of compressed cast concrete established for this invention. Figure 2 The relationship between the strength enhancement coefficient and the water-cement ratio in the compressive strength design method for cast-in-place concrete established in this invention; Figure 3 The relationship between the strength enhancement coefficient and compressive stress in the compressive strength design method for cast concrete established in this invention; Figure 4 The relationship between the strength enhancement coefficient and compression time in the compressive strength design method for compressed cast concrete established in this invention; Figure 5 A comparison chart showing the predictive effects of the compressive strength design method for cast concrete established in this invention. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that the following detailed description is illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0024] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0025] Example 1 This embodiment discloses a method for designing the compressive strength of compression-cast concrete, such as... Figure 1 As shown, it includes the following steps: Step 1: Calculate the compressive strength of ordinary concrete after 28 days of standard curing under the same water-cement ratio, according to JGJ 55-2011 "Specification for Mix Proportion Design of Ordinary Concrete", as shown in formula (1): (1) In the formula: The compressive strength of ordinary concrete after 28 days of standard curing at the same water-cement ratio is expressed in MPa. The compressive strength of the cementitious material mortar after 28 days is expressed in MPa. This indicates the water-cement ratio of the concrete; and These are empirical coefficients related to the type of coarse aggregate; for crushed stone, they are 0.53 and 0.49, and for gravel, they are 0.49 and 0.13.

[0026] Step 2: Calculate the compression strength enhancement factor using water-cement ratio, compressive stress, and compression time. As shown in formula (2): (2) Mode middle: For regression coefficients, To take compressive stress into account p and compression time T The strength enhancement coefficient.

[0027] Step 3: Using the compressive strength of NC and the compression casting strength enhancement factor, calculate the compressive strength of CCC, as shown in formula (3): (3) As a further aspect of the present invention, the method for calculating the compressive strength of compressed cast concrete is compared with the compressive strength of ordinary concrete with the same mix proportion. The value range is 18 ~ 40 MPa; the water-cement ratio value is... Range 0.4 ~ 0.7; empirical coefficient related to water-cement ratio and The values ​​are -1.090 and 1.970 respectively.

[0028] like Figure 1 As shown, the compressive strength design method for compressed concrete disclosed in this invention consists of the following steps: First, calculate the compressive strength of ordinary concrete under standard curing for 28 days with the same water-cement ratio according to JGJ 55-2011 "Specification for Mix Proportion Design of Ordinary Concrete"; then calculate the compressive strength enhancement coefficient using the water-cement ratio, compressive stress, and compression time; finally, calculate the compressive strength of the compressed concrete using the compressive strength of ordinary concrete and the strength enhancement coefficient.

[0029] The following is about the strength enhancement coefficient of compression casting. The specific process of obtaining the formula will be explained below: The compression strength enhancement factor is essentially the ratio of the compressive strength of compressed concrete to the compressive strength of ordinary concrete. In order to build The specific form needs to be determined. The relationship between the water-cement ratio, compression time, and compression stress was analyzed. Relationship with water-cement ratio, compression time and compressive stress ( Figure 2 , Figure 3 and Figure 4 It can be seen that as the water-cement ratio increases (0.4-0.7), The relationship between the water-cement ratio and the water-cement ratio exhibits a quadratic function relationship, first decreasing and then increasing. The first part is a quadratic function of the water-cement ratio ( As compressive stress (0-15 MPa) and compression time (0.5-30 min) change, It varies around a constant, therefore The second part is a constant related to compressive stress and compression time. Finally, considering the coupled effects of water-cement ratio, compression time, and compressive stress, the quadratic function part regarding water-cement ratio ( ) and the constants related to compressive stress and compression time ( Multiplying the results represents the combined effect, yielding the final strength enhancement coefficient. .

[0030] like Figure 2 As shown, the average lift coefficients for concrete specimens with water-cement ratios of 0.4, 0.5, 0.6, and 0.7 were 1.67, 1.60, 1.63, and 1.83, respectively. It can be observed that the lift coefficient exhibits an approximately quadratic relationship with the water-cement ratio. This is because: compared to CCC specimens with water-cement ratios of 0.5 and 0.6, the specimen with a water-cement ratio of 0.4 expelled more gas during compression, and the specimen with a water-cement ratio of 0.7 expelled more water during compression. Compared to NC specimens with water-cement ratios of 0.5 and 0.6, the NC specimen mixture with a water-cement ratio of 0.4 had lower fluidity and contained more air bubbles and pores, while the CCC specimen was able to expel more pores and air bubbles during pressurization, resulting in a higher lift coefficient at a water-cement ratio of 0.4. Compared with NC specimens with water-cement ratios of 0.5 and 0.6, NC specimens with a water-cement ratio of 0.7 contain more water and have more pores inside the concrete after hardening. CCC specimens can expel excess water during the pressurization process, resulting in a higher lifting coefficient when the water-cement ratio is 0.7.

[0031] like Figure 3 As shown, compressive stress is a process parameter that distinguishes CCC from NC. This embodiment further analyzes the relationship between the enhancement factor and compressive stress. Although compression casting can improve the compressive strength of concrete, experimental tests revealed that compressive stress (5, 10, 15, and 20 MPa) had no significant effect on the enhancement factor of compressive strength. Therefore, a constant was used to characterize the effect of compressive stress on the enhancement factor, with an average value of 1.667.

[0032] like Figure 4 As shown, compression time is a process parameter that distinguishes CCC from NC, and the relationship between the enhancement coefficient and the compression specimens was analyzed. Although compression casting can improve the compressive strength of concrete, experimental tests revealed that compression time (0.5, 2, 10, and 30 min) had no significant effect on the enhancement coefficient of compressive strength. Therefore, a constant was used to characterize the effect of compression time on the enhancement coefficient, with an average value of 1.667. Thus, 1.667 was used to comprehensively represent the influence of compressive stress and compression time.

[0033] like Figure 5 As shown in the comparison chart between the predicted results of the compressive strength model of compressed concrete established in this invention and existing strength models, the compressive strength of compressed concrete is predicted using both the model of this invention and the existing model. The ratio of the predicted value to the measured value is plotted, and the average ratio and coefficient of variation are calculated.

[0034] The technical solutions described below will be explained in detail and comprehensively with reference to specific embodiments of the present invention.

[0035] In this specific embodiment, the raw materials for the compressed concrete production include cement, water, sand, and crushed stone. However, in specific implementations of this invention, the compressed concrete is not limited to the aforementioned raw materials. Among the raw materials, the cement is P.O42.5 ordinary Portland cement, the water is tap water, the sand is medium sand, and the crushed stone has a maximum particle size of no more than 25 mm and does not contain particles with a particle size of 5-9 mm. Sixteen sets of 100 mm cube specimens with both compressed concrete and ordinary concrete mix proportions were poured. After curing for 28 days under standard conditions (relative humidity 95%, temperature 20 ℃), compressive strength tests were conducted. The water-cement ratio of the specimens and the test results are shown in Table 1.

[0036] Table 1 Group number water-cement ratio CCC compressive strength (MPa) NC compressive strength (MPa) M1-NC / M1-CCC 0.4 58.08 26.14 M2-NC / M2-CCC 0.4 54.97 33.82 M3-NC / M3-CCC 0.4 51.05 40.53 M4-NC / M4-CCC 0.4 51.24 31.29 M5-NC / M5-CCC 0.5 57.48 38.10 M6-NC / M6-CCC 0.5 45.85 35.06 M7-NC / M7-CCC 0.5 56.01 33.92 M8-NC / M8-CCC 0.5 51.36 28.99 M9-NC / M9-CCC 0.6 52.82 29.89 N10-NC / M10-CCC 0.6 55.33 30.51 M11-NC / M11-CCC 0.6 43.15 30.40 M12-NC / M12-CCC 0.6 46.38 29.49 M13-NC / M13-CCC 0.7 44.44 22.19 M14-NC / M14-CCC 0.7 32.17 21.26 M15-NC / M15-CCC 0.7 52.86 24.11 M16-NC / M16-CCC 0.7 28.84 17.73 Note: In the table, CCC represents compressed concrete and NC represents ordinary concrete. The compressive strength design method for compressed cast concrete described in this invention is used to predict the compressive strength of compressed cast concrete, and the results are compared with existing compressive strength design methods. The average ratio (ratio of predicted value to measured value) and the coefficient of variation of the average ratio are calculated (see Table 2), and a comparison is plotted (see Figure 3). Figure 5 .

[0037] Table 2

[0038] The results show that, compared with existing models, the model of this invention has a mean ratio closer to 1 (1.040) and a lower coefficient of variation (0.172), demonstrating significantly better predictive performance. This is because the model of this invention considers the effects of compressive stress and compression time. Existing models, however, only consider the compressive strength of ordinary concrete, failing to fully reflect the mechanism of increased compressive strength in compressed concrete. Therefore, the model proposed in this invention can significantly improve the predictive performance of compressed concrete.

[0039] Example 2 This embodiment also provides a system for calculating the compressive strength of compressed concrete, including: The first module is configured to obtain the compressive strength of ordinary concrete after a set curing time at the same water-cement ratio. ; The second module is configured to obtain the compression casting strength enhancement coefficient. ,in:

[0040] In the formula: For regression coefficients, To take compressive stress into account p and compression timeT The strength enhancement coefficient; This indicates the water-cement ratio of ordinary concrete under the same water-cement ratio in step 1; The third module is configured to be based on the compressive strength. and the coefficient of performance enhancement of compression casting strength Calculate the compressive strength of compressed concrete. .

[0041] As a further technical solution, in the aforementioned calculation method and calculation system, the... The calculation method is as follows: (1) In the formula: The compressive strength of ordinary concrete after 28 days of standard curing at the same water-cement ratio is expressed in MPa. The compressive strength of the cementitious material mortar after 28 days is expressed in MPa. This indicates the water-cement ratio of the concrete; and These are empirical coefficients related to the type of coarse aggregate; for crushed stone, they are 0.53 and 0.49, and for gravel, they are 0.49 and 0.13.

[0042] As a further technical solution, in the aforementioned calculation method and calculation system, the... The value range is 18 ~ 40 MPa; the water-cement ratio value is... Range 0.4 ~ 0.7.

[0043] As a further technical solution, the regression coefficients related to the water-cement ratio in the aforementioned calculation method and system... and The values ​​are -1.090 and 1.970 respectively.

[0044] As a further technical solution, the compressive strength mentioned in the calculation method and calculation system... The calculation method is as follows: .

[0045] Example 3 This embodiment provides a computer-readable storage medium storing a program that, when executed by a processor, implements the steps in the method for calculating the compressive strength of compressed concrete as described in Embodiment 1 of the present invention.

[0046] The detailed steps are the same as the calculation method for the compressive strength of the concrete provided in Example 1, and will not be repeated here.

[0047] Example 4 Embodiment 4 of the present invention provides an electronic device.

[0048] This embodiment provides an electronic device, including a memory, a processor, and a program stored in the memory and running on the processor. When the processor executes the program, it implements the steps in the method for calculating the compressive strength of compressed concrete as described in Embodiment 1 of this invention.

[0049] The detailed steps are the same as the calculation method for the compressive strength of the concrete provided in Example 1, and will not be repeated here.

[0050] This invention can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code. The solutions in the embodiments of this invention can be implemented using various computer languages, such as the object-oriented programming language Java, the interpreted scripting language JavaScript, and the Python language.

[0051] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, systems, and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0052] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0053] These computer program instructions can also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0054] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of this invention and its equivalents, this invention also intends to include these modifications and variations.

Claims

1. A method for calculating the compressive strength of compressed concrete, characterized in that, Includes the following steps: Step 1: Obtain the compressive strength of ordinary concrete after standard curing time at the same water-cement ratio. ; Step 2: Obtain the compression casting strength enhancement coefficient ,in: In the formula: For regression coefficients, To take compressive stress into account p and compression time T The strength enhancement coefficient; This indicates the water-cement ratio of ordinary concrete under the same water-cement ratio in step 1; Step 3, based on the compressive strength and the coefficient of performance enhancement of compression casting strength Calculate the compressive strength of compressed concrete. .

2. The method for calculating the compressive strength of compressed concrete as described in claim 1, characterized in that, The aforementioned The calculation method is as follows: In the formula: The compressive strength of ordinary concrete after 28 days of standard curing at the same water-cement ratio is expressed in MPa. The compressive strength of the cementitious material mortar after 28 days is expressed in MPa. This indicates the water-cement ratio of the concrete; and These are empirical coefficients related to the type of coarse aggregate; for crushed stone, they are 0.53 and 0.49, and for gravel, they are 0.49 and 0.

13.

3. The method for calculating the compressive strength of compressed concrete as described in claim 2, characterized in that, The The value range is 18 ~ 40 MPa; the water-cement ratio value is... Range 0.4 ~ 0.7; Regression coefficients related to water-cement ratio and The values ​​are -1.090 and 1.970 respectively.

4. The method for calculating the compressive strength of compressed concrete as described in claim 1, characterized in that, The compressive strength The calculation method is as follows: 。 5. A system for calculating the compressive strength of compressed concrete, characterized in that, include: The first module is configured to obtain the compressive strength of ordinary concrete after a set curing time at the same water-cement ratio. ; The second module is configured to obtain the compression casting strength enhancement coefficient. ,in: In the formula: For regression coefficients, To take compressive stress into account p and compression time T The strength enhancement coefficient; This indicates the water-cement ratio of ordinary concrete under the same water-cement ratio in step 1; The third module is configured to be based on the compressive strength. and the coefficient of performance enhancement of compression casting strength Calculate the compressive strength of compressed concrete. .

6. The calculation system for the compressive strength of compressed concrete as described in claim 5, characterized in that, The aforementioned The calculation method is as follows: In the formula: The compressive strength of ordinary concrete after 28 days of standard curing at the same water-cement ratio is expressed in MPa. The compressive strength of the cementitious material mortar after 28 days is expressed in MPa. This indicates the water-cement ratio of the concrete; and These are empirical coefficients related to the type of coarse aggregate; for crushed stone, they are 0.53 and 0.49, and for gravel, they are 0.49 and 0.

13.

7. The calculation system for the compressive strength of compressed concrete as described in claim 5, characterized in that, The The value range is 18 ~ 40 MPa; the water-cement ratio value is... Range 0.4 ~ 0.7; Regression coefficients related to water-cement ratio and The values ​​are -1.090 and 1.970 respectively.

8. The calculation system for the compressive strength of compressed concrete as described in claim 5, characterized in that, The compressive strength The calculation method is as follows: 。 9. A computing device, characterized in that, include: The processor and the memory storing a computer program, which, when executed by the processor, performs the method for calculating the compressive strength of compressed concrete as described in any one of claims 1 to 4.

10. A computer-readable storage medium, characterized in that, The system stores instructions that, when executed on a computer, cause the computer to perform the method for calculating the compressive strength of compressed cast concrete as described in any one of claims 1 to 4.

Images