Application of X-ray imaging to determine the distribution of steel fibers in concrete and its determination method

Abstract

The invention relates to the technical field of X-ray imaging, in particular to the application of X-ray imaging to determine the distribution of steel fibers in concrete and a determination method thereof, comprising the following steps: step one: sampling and inspection; step two: sample purification; step three: template sample preparation; step four: X-ray imager equipment model selection; step five: X-ray imager barometer data inspection and startup; step six: X-ray imager equipment detection; step seven: X-ray imager equipment parameter setting; step eight: using the X-ray imager to detect and image the template sample; step nine: using the X-ray imager to perform multiple detections on the sampled steel fiber sample; step ten: X-ray detection image data measurement and recording; step eleven: X-ray detection image data analysis and comparison; step twelve: comparison and judgment with concrete steel fiber content performance data; the invention can detect the concrete steel fiber content to determine its performance and construction quality.

Description

Technical Field

[0001] The invention relates to the field of X-ray imaging, and in particular to the application of X-ray imaging in determining the distribution of steel fibers in concrete and a determination method thereof. Background Art

[0002] X-rays are particle streams generated by the transition of electrons in atoms between two energy levels with a large energy difference. They are electromagnetic radiation with a wavelength between ultraviolet rays and gamma rays. Their wavelength is very short, ranging from about 0.01 to 100 angstroms. They were discovered by German physicist W.K. Roentgen in 1895, so they are also called Roentgen rays. Roentgen rays have a high penetrating ability and can penetrate many materials that are opaque to visible light, such as ink, paper, and wood. This invisible ray can cause many solid materials to produce visible fluorescence, make photographic film sensitive, and ionize the air. Wavelengths less than 0.1 angstroms are called superhard X-rays, those in the range of 0.1 to 1 angstroms are called hard X-rays, and those in the range of 1 to 100 angstroms are called soft X-rays. Steel fiber refers to the X-rays produced by cutting thin steel wires, shearing cold-rolled strip steel, Fibers with an aspect ratio (the ratio of fiber length to its diameter; when the fiber cross section is non-circular, the diameter of the equivalent cross-sectional circular area is converted) of 40 to 80 are made by milling steel ingots or rapidly condensing molten steel. Adding an appropriate amount of steel fiber to mortar or concrete can improve its tensile and flexural strength, and greatly improve its toughness and impact strength. Steel fiber is mainly used to make steel fiber concrete. Steel fiber produced by any method can play a role in strengthening concrete. The reinforcement effect of the fiber mainly depends on the matrix strength, the aspect ratio of the fiber (the ratio of the steel fiber length l to the diameter d, i.e. I / d), the volume rate of the fiber (the volume percentage of steel fiber in steel fiber concrete), the bonding strength between the fiber and the matrix (τ), and the distribution and orientation of the fiber in the matrix (η). When steel fiber concrete is damaged, the fibers are mostly pulled out instead of being broken. Therefore, improving the bonding strength between the fiber and the matrix is ​​one of the main control factors for improving the fiber reinforcement effect. The compressive strength, tensile strength, flexural strength, impact strength, toughness, impact toughness and other properties of concrete with the addition of steel fibers are greatly improved. Therefore, it is very common in concrete applications. The content and distribution of steel fibers in concrete have a decisive influence on its performance. However, since the steel fibers cannot be distinguished by the naked eye after being mixed into concrete, the distribution of steel fibers in concrete cannot be determined.

[0003] Therefore, there is an urgent need to design an application of X-ray imaging to determine the distribution of steel fibers in concrete and a determination method thereof that can solve one or more of the above problems. Summary of the invention

[0004] In order to solve one or more problems existing in the prior art, the present invention provides an application of X-ray imaging to determine the distribution of steel fibers in concrete and a determination method thereof.

[0005] The technical solution adopted by the present invention to achieve the above-mentioned purpose is: a method for determining the distribution of steel fibers in concrete by X-ray imaging, comprising the following steps:

[0006] Step 1: Take samples for inspection to determine the types of steel fiber concrete components.

[0007] Step 2: Sample purification: purify the sampled steel fiber concrete to separate the concrete components from the steel fibers.

[0008] Step 3: Prepare formwork samples, including steel fiber formwork samples and concrete formwork samples.

[0009] Step 4: Select the X-ray imager equipment model. Choose the X-ray imager with corresponding tube current and tube voltage values ​​according to the type of concrete components.

[0010] Step 5: Check and start the X-ray imager's gas pressure gauge data. Check whether the gas pressure gauge data of the X-ray generator is above the standard gas pressure data of the corresponding X-ray generator. If the data does not meet the requirements, it is strictly forbidden to start the machine. If the data meets the requirements, it is started.

[0011] Step 6: X-ray imager equipment inspection and troubleshooting. Start the X-ray imager to detect and image the measured material samples. Compare the imaged X-ray images with the sample database to determine whether the equipment is normal.

[0012] Step 7: Setting the X-ray imager equipment parameters, pre-adjusting the X-ray imager equipment mode, and setting it to an imaging data mode for detecting concrete categories.

[0013] Step 8: Use an X-ray imager to detect and image the formwork samples, and place the concrete formwork samples and steel fiber formwork samples at the detection points for detection and imaging.

[0014] Step 9: Use an X-ray imager to perform multiple tests on the sampled steel fiber samples, and place multiple sampled steel fiber concrete at the test point for X-ray detection and imaging.

[0015] Step 10: X-ray detection image data measurement and recording, measure the image size of all detection images, and record the detection values.

[0016] Step 11: X-ray detection image data analysis and comparison, compare the image with the template sample image data, and determine its distribution.

[0017] Step 12: Compare and judge with the performance data of steel fiber content in concrete, and judge the impact of the test data and the content of steel fiber in concrete on the slump, flexural strength and compressive strength of the concrete.

[0018] Preferably, the sampling and testing method in step 1 adopts multiple multi-point sampling to determine whether the concrete is a single type of concrete or a mixed type of concrete except for the steel fiber material contained.

[0019] Preferably, the sample purification method in step 2 uses a water washing method to test multiple samples, washes the steel fibers out of the concrete and filters them, and weighs them after drying to obtain steel fiber samples, and dries and purifies the concrete solution to obtain concrete samples.

[0020] Preferably, the X-ray imaging device model in step three should be selected based on the characteristics of the concrete material, from the perspectives of image quality, work efficiency, use cost and after-sales service, and the image quality involves the distortion, signal-to-noise ratio, resolution, clarity, and detail display of the radiological image, which is related to the accuracy of the detection result as the main selection condition.

[0021] Preferably, the parameter setting in step seven mainly includes three setting parameters, namely, kilovolt value, time value and delay time value. The kilovolt value and time value are set according to the sample transillumination requirements and with reference to the exposure curve table.

[0022] Preferably, in the step twelve, the numerical changes of the concrete properties such as slump, flexural strength and compressive strength with the steel fiber content are as follows: the slump of the concrete gradually decreases with the increase of the steel fiber content, the compressive strength increases first and then decreases with the increase of the steel fiber content, and the flexural strength increases continuously with the increase of the steel fiber content.

[0023] An application of a method for determining the distribution of steel fibers in concrete based on X-ray imaging, comprising the following steps:

[0024] For the quality inspection of poured concrete buildings, fixed-point sampling is first adopted, and then X-ray imaging is performed to determine the steel fiber content of the steel fiber concrete and whether the construction materials meet the standards.

[0025] The beneficial effects of the present invention are as follows: the present invention adopts sampling inspection, sample purification, template sample preparation, X-ray imager equipment model selection, X-ray imager barometer data inspection and startup, X-ray imager equipment detection, X-ray imager equipment parameter setting, using X-ray imager to detect and image template samples, using X-ray imager to perform multiple detections on sampled steel fiber samples, X-ray detection image data measurement and recording, X-ray detection image data analysis and comparison and comparison and analysis with concrete steel fiber content performance data, and judges the dosage of steel fibers in the image through the distribution of steel fibers, and then judges the slump, flexural strength and compressive strength of concrete with the dosage, analyzes the forming performance of concrete, and can be further applied to concrete buildings, and the quality of buildings can be detected by detecting the dosage of steel fibers in the concrete buildings after pouring and judging their performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further explained below in conjunction with the accompanying drawings and Examples:

[0027] Figure 1 The present invention is a flow chart of a method for determining the distribution of steel fibers in concrete by using X-ray imaging. DETAILED DESCRIPTION

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The present invention is described in detail below, and the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more understandable, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0030] The present invention provides an application of X-ray imaging to determine the distribution of steel fibers in concrete and a determination method thereof by improving the present invention. The technical solution of the present invention is:

[0031] Embodiment 1:

[0032] like Figure 1 As shown, the application of X-ray imaging to determine the distribution of steel fibers in concrete and the determination method thereof include the following steps:

[0033] Step 1: Take samples for inspection to determine the types of steel fiber concrete components.

[0034] Step 2: Sample purification: purify the sampled steel fiber concrete to separate the concrete components from the steel fibers.

[0035] Step 3: Prepare formwork samples, including steel fiber formwork samples and concrete formwork samples.

[0036] Step 4: Select the X-ray imager equipment model. Choose the X-ray imager with corresponding tube current and tube voltage values ​​according to the type of concrete components.

[0037] Step 5: Check and start the X-ray imager's gas pressure gauge data. Check whether the gas pressure gauge data of the X-ray generator is above the standard gas pressure data of the corresponding X-ray generator. If the data does not meet the requirements, it is strictly forbidden to start the machine. If the data meets the requirements, it is started.

[0038] Step 6: X-ray imager equipment inspection and troubleshooting. Start the X-ray imager to detect and image the measured material samples. Compare the imaged X-ray images with the sample database to determine whether the equipment is normal.

[0039] Step 7: Setting the X-ray imager equipment parameters, pre-adjusting the X-ray imager equipment mode, and setting it to an imaging data mode for detecting concrete categories.

[0040] Step 8: Use an X-ray imager to detect and image the formwork samples, and place the concrete formwork samples and steel fiber formwork samples at the detection points for detection and imaging.

[0041] Step 9: Use an X-ray imager to perform multiple tests on the sampled steel fiber samples, and place multiple sampled steel fiber concrete at the test point for X-ray detection and imaging.

[0042] Step 10: X-ray detection image data measurement and recording, measure the image size of all detection images, and record the detection values.

[0043] Step 11: X-ray detection image data analysis and comparison, compare the image with the template sample image data, and determine its distribution.

[0044] Step 12: Compare and judge with the performance data of steel fiber content in concrete, and judge the impact of the test data and the content of steel fiber in concrete on the slump, flexural strength and compressive strength of the concrete.

[0045] Furthermore, the sampling and testing method in step 1 adopts multiple multi-point sampling to determine whether the concrete is a single type of concrete or a mixed type of concrete except for the steel fiber material contained.

[0046] Furthermore, the sample purification method in step 2 uses a water washing method to test multiple samples, washes the steel fibers out of the concrete and filters them, and then weighs them after drying to obtain steel fiber samples, and then dries and purifies the concrete solution to obtain concrete samples.

[0047] Furthermore, the selection of the X-ray imaging device model in step three should be based on the characteristics of the concrete material, from the perspectives of image quality, work efficiency, use cost and after-sales service. The image quality involves the distortion, signal-to-noise ratio, resolution, clarity and detail display of the radiological image, which is related to the accuracy of the detection results as the main selection condition.

[0048] Furthermore, the parameter setting in step seven mainly includes three setting parameters, namely, kilovolt value, time value and delay time value. The kilovolt value and time value are set according to the sample exposure requirements and with reference to the exposure curve table.

[0049] Furthermore, in the step twelve, the numerical changes of the concrete slump, flexural strength and compressive strength with the steel fiber content are as follows: the slump of the concrete gradually decreases with the increase of the steel fiber content, the compressive strength increases first and then decreases with the increase of the steel fiber content, and the flexural strength increases continuously with the increase of the steel fiber content.

[0050] An application of a method for determining the distribution of steel fibers in concrete based on X-ray imaging, comprising the following steps:

[0051] For the quality inspection of poured concrete buildings, fixed-point sampling is first adopted, and then X-ray imaging is performed to determine the steel fiber content of the steel fiber concrete and whether the construction materials meet the standards.

[0052] Working principle: The first step is to take samples for inspection to determine the type of steel fiber concrete components; the second step is to purify the samples, purify the sampled steel fiber concrete, and separate the concrete components from the steel fibers; the third step is to prepare the template samples, prepare the steel fiber template samples and concrete template samples; the fourth step is to select the X-ray imager equipment model, and select the X-ray imager with the corresponding tube current and tube voltage values ​​according to the type of concrete components; the fifth step is to check and start the X-ray imager barometer data, and check whether the gas pressure gauge data of the X-ray generator is above the standard air pressure data of the corresponding X-ray generator. If the data does not meet the requirements, it is strictly forbidden to start the machine. If the data meets the requirements, it is turned on; the sixth step is to detect and troubleshoot the X-ray imager equipment, start the X-ray imager to detect and image the measured material samples, and compare the imaged X-ray images with the sample database to determine whether the equipment is normal; the seventh step is to perform X-ray The equipment parameters of the line imager are set, and the equipment mode of the X-ray imager is pre-adjusted to the imaging data mode for detecting the concrete category; the eighth step is to use the X-ray imager to detect and image the template samples, and place the concrete template samples and steel fiber template samples at the detection point for detection and imaging; the ninth step is to use the X-ray imager to perform multiple detections on the sampled steel fiber samples, and place multiple sampled steel fiber concrete at the detection point for X-ray detection imaging; the tenth step is to measure and record the X-ray detection image data, measure the image size of all the detection images, and record the detection values; the eleventh step is to analyze and compare the X-ray detection image data, compare the image with the template sample image, and judge its distribution; finally, compare and judge with the performance data of the concrete steel fiber content, and judge the influence of the detection data and the steel fiber content in the concrete on the concrete slump, flexural strength and compressive strength.

[0053] The above-mentioned embodiments only express one or more implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. A method for determining the distribution of steel fibers in concrete using X-ray imaging, characterized in that: The following steps are involved: Step 1: Take samples for testing to determine the types of steel fiber concrete components; Step 2: Sample purification: purify the sampled steel fiber concrete to separate the concrete components from the steel fibers; Step 3: preparing formwork samples, including steel fiber formwork samples and concrete formwork samples; Step 4: Select the model of X-ray imager equipment. Select the X-ray imager with the corresponding tube current and tube voltage values ​​according to the type of concrete components; Step 5: Check and start the X-ray imager's gas pressure gauge data. Check whether the gas pressure gauge data of the X-ray generator is above the standard gas pressure data of the corresponding X-ray generator. If the data does not meet the standard, it is forbidden to start the machine. If the data meets the standard, it is allowed to start the machine. Step 6: X-ray imager equipment detection and troubleshooting, start the X-ray imager to detect and image the measured material sample, compare the imaged X-ray image with the sample database to determine whether the equipment is normal; Step 7: Setting the parameters of the X-ray imager equipment, pre-adjusting the equipment mode of the X-ray imager to an imaging data mode for detecting concrete categories; Step 8: Use an X-ray imager to detect and image the formwork sample, and place the concrete formwork sample and the steel fiber formwork sample at the detection point for detection and imaging; Step 9: Use an X-ray imager to perform multiple tests on the sampled steel fiber samples, and place multiple sampled steel fiber concrete at the test point for X-ray detection imaging; Step 10: X-ray detection image data measurement and recording, measure the image size of all detection images, and record the detection values; Step 11: X-ray detection image data analysis and comparison, compare the image with the template sample image and determine its distribution; Step 12: Compare and judge with the performance data of steel fiber content in concrete, and judge the influence of the test data and the content of steel fiber in concrete on the slump, flexural strength and compressive strength of concrete; The selection of the X-ray imaging device model in step 4 should be based on the characteristics of the concrete material, from the perspectives of image quality, work efficiency, use cost and after-sales service. The image quality involves the distortion, signal-to-noise ratio, resolution, clarity and detail display of the radiographic image, which is related to the accuracy of the test results as the main selection condition. The parameter setting in step seven mainly includes three setting parameters, namely, kilovolt value, time value and delay time value. The kilovolt value and time value are set according to the sample transillumination requirements and with reference to the exposure curve table; The numerical changes of concrete slump, flexural strength and compressive strength with the steel fiber content in step 12 are as follows: the slump of concrete gradually decreases with the increase of steel fiber content, the compressive strength increases first and then decreases with the increase of steel fiber content, and the flexural strength increases continuously with the increase of steel fiber content.

2. The method for determining the distribution of steel fibers in concrete by X-ray imaging according to claim 1, characterized in that: The sampling and testing method in step 1 adopts multiple multi-point sampling to determine whether the concrete is a single type of concrete or a mixed type of concrete, except for the steel fiber material contained.

3. The method for determining the distribution of steel fibers in concrete by X-ray imaging according to claim 1, characterized in that: The sample purification method in step 2 uses a water washing method to test multiple samples, washes the steel fibers out of the concrete, filters them, and weighs them after drying to obtain steel fiber samples, and dries and purifies the concrete solution to obtain concrete samples.

4. An application of the method for determining the distribution of steel fibers in concrete by X-ray imaging as claimed in claim 1, characterized in that: The application includes the following steps: For the quality inspection of poured concrete buildings, fixed-point sampling is first adopted, and then X-ray imaging is performed to determine the steel fiber content of the steel fiber concrete and whether the construction materials meet the standards.

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