Preparation method of high-strength self-compacting concrete

Abstract

The present invention provides a preparation method of high-strength self-compacting concrete, belonging to the technical field of concrete preparation. It includes a machine body and a mounting plate. A frame is fixedly connected to the bottom of the machine body. A sample tube is fixedly connected to one side of the bottom of the machine body. A water delivery pipe is fixedly connected to the top of the sample tube. An electric control valve is fixedly connected to the sample tube. A detection plate is fixedly connected to the bottom of the mounting plate. A slump cone is placed on the top of the detection plate; a detection component, which is used to detect the slump and spread of the concrete in the machine body, and the detection component is respectively connected to the sample tube and the mounting plate. By setting the detection component, the present invention can automatically detect the slump and spread of the concrete. There is no need for human intervention in the detection process, and all operations of the detection are fully automated. Such a setting not only improves the accuracy of sample detection but also makes the detection efficiency higher.

Description

Technical Field

[0001] The present invention relates to the technical field of concrete preparation, and particularly relates to a method for preparing high-strength self-compacting concrete. Background Art

[0002] High-strength self-compacting concrete is a kind of concrete with high fluidity, high filling property and good self-compacting performance. It can fill the formwork by itself without relying on external vibration and reach the required density of the design.

[0003] During the preparation of high-strength self-compacting concrete, it is necessary to detect the slump and spread of the sample to ensure the qualified rate of the product. At present, the most common detection method is to use a slump cone for detection. The specific detection process is as follows: First, the operator takes a sample from the sample device and fills it into the slump cone. During the filling process, the operator steps on the foot pedals on both sides of the slump cone with both feet to ensure the structural stability of the slump cone during the filling of the material. After the sample is filled, the operator needs to lift the slump cone vertically and smoothly. When the sample no longer slumps or the slump time reaches 30 seconds, the operator can measure and record the data.

[0004] In the above operation process: The operator often needs to use a funnel to prevent the concrete from leaking to the outer wall of the slump cone or the detection plate during the filling of the sample. However, despite this, since the filling work is manually operated, it is difficult to control the pouring speed according to the viscosity of the concrete. In the actual operation process, the concrete often leaks due to improper operation. If the sample falls outside the slump cone, it needs to be cleaned separately, which affects the detection efficiency; when the operator lifts the slump cone, the slump cone needs to be lifted vertically and smoothly. However, due to the large volume of the slump cone and the lack of a guiding tool to assist the operator when lifting the slump cone, in actual operation, it is often impossible to ensure that the slump cone can be accurately lifted vertically. If one side of the slump cone is lifted first, it will cause the concrete on the first lifted side in the slump cone to flow out first, resulting in the deviation of the position where the concrete slumps and making the detection data inaccurate. Therefore, based on the above problems, the present invention provides a method for preparing high-strength self-compacting concrete to meet the requirements. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a method for preparing high-strength self-compacting concrete. By setting up a detection component, the detection of the slump and spread of the concrete can be automatically realized, and no human intervention is required in the detection process. All operations of the detection are fully automated. Such a setting not only improves the accuracy of sample detection but also makes the detection efficiency higher. Through the above settings, the problem of low efficiency in detecting the spread and slump of concrete by existing equipment can be solved.

[0006] To solve the above technical problems, the present invention provides the following technical solutions:

[0007] A preparation method of high-strength self-compacting concrete, comprising the following steps:

[0008] Step 1, material preparation: accurately measure the cementitious materials, aggregates, admixtures and water by using measuring equipment. The cementitious materials mainly include portland cement or ordinary portland cement, and also include mineral admixtures such as fly ash, granulated blast furnace slag powder, silica fume, etc. according to the product requirements of the project; the aggregates include coarse aggregates and fine aggregates. The coarse aggregates are of continuous gradation, and the maximum nominal size should not be greater than 20 mm. Medium sand is used as the fine aggregate; the admixtures mainly include high-range water reducers, and also include expansion agents, air-entraining agents, defoaming agents, etc.;

[0009] Step 2, mix proportion design: design the mix proportion according to the project requirements. When designing the mix proportion, self-compacting performance, strength, durability, etc. should be considered. First, determine the concrete mixing strength (fcu,o), fcu,o = fcu,k + 1.645σ. Wherein, fcu,k is the standard value of the cube compressive strength of concrete, and σ is the standard deviation of concrete strength; then determine the water-binder ratio, and determine the water-binder ratio according to the regression coefficient and the type of gravel to ensure the durability of the concrete. Among them, the water-binder ratio is less than 0.45, and the dosage of the cementitious materials should be controlled between 400 kg / m 3 and 550 kg / m 3 ; then select the unit mixing water consumption of the concrete. The determination of the water consumption is based on the dryness and plasticity of the concrete; finally, add an appropriate amount of mineral admixtures, such as fly ash, granulated blast furnace slag powder, silica fume, etc. to adjust the rheological properties of the concrete;

[0010] Step 3, mixing: use a mixer to first mix the fine aggregate and the coarse aggregate evenly, then add sodium polyacrylate, dispersant, expansion agent, limestone powder particles, and cement and mix them evenly. Finally, add the water reducer and mix evenly, and then add water and mix evenly. The mixing time is not less than 60 seconds and is appropriately extended compared with non-self-compacting concrete;

[0011] Step 4, sampling and testing: sample from the mixer by using a sampling bucket. After ensuring that the inner wall and bottom plate of the slump cone are wet and there is no free water, place the slump cone on the solid and horizontal bottom plate detection surface. The slump cone is placed in the center of the bottom plate. The operator steps on the pedal on both sides of the slump cone with his feet to ensure that the slump cone remains fixed during the loading process. Fill the material in the sampling bucket into the slump cone. After the material is filled, remove the loading funnel on the top of the slump cone, and scrape off the excess concrete mixture and level it along the barrel mouth. Then the operator vertically and smoothly lifts the slump cone. After the material in the slump cone completely falls off, gently place the slump cone beside the sample. When the sample on the bottom plate no longer continues to slump or the slumping time reaches 30 seconds, the operator observes, measures and records the data;

[0012] Step 5: Transportation and pouring: Transport the materials meeting the project requirements to the project site by a concrete mixer truck, and take measures such as sun protection and cold protection during transportation. When pouring self-compacting concrete, a dedicated person is on-site for monitoring to ensure that the self-compactability of the concrete meets the requirements. After the self-compacting concrete is poured, promptly adopt curing measures such as covering, water storage, film moisturizing, spraying or brushing a curing agent, and the curing time shall not be less than 14 days.

[0013] Optionally, the mixer includes a machine body and a mounting plate. A frame is fixedly connected to the bottom of the machine body. A sample tube is fixedly connected to one side of the bottom of the machine body. A water delivery pipe is fixedly connected to the top of the sample tube. An electric control valve is fixedly connected to the sample tube. A detection plate is fixedly connected to the bottom of the mounting plate. A slump cone is placed on the top of the detection plate; a detection component for detecting the slump and spread of the concrete in the machine body, and the detection component is respectively connected to the sample tube and the mounting plate.

[0014] Optionally, the detection component includes an inner sleeve screwed to the bottom of the sample tube, and further includes a lifting mechanism fixedly connected to one side of the mounting plate. A mounting frame is fixedly connected to one side of the lifting mechanism. An outer sleeve is fixedly connected to one end of the mounting frame.

[0015] Optionally, a triangular elastic plate is fixedly connected to the bottom of the outer sleeve. A V-shaped clamping plate adapted to the contour of the triangular elastic plate is fixedly connected to the top of the slump cone.

[0016] Optionally, a recessed portion is provided on the top of the triangular elastic plate. Connecting plates are symmetrically installed on the top of the triangular elastic plate. A clamping plate is fixedly connected to the top of the connecting plate.

[0017] Optionally, a partition is fixedly connected to the inner circumference of the V-shaped clamping plate. A second avoidance groove adapted to the size of the partition is opened at the bottom of the outer sleeve. A first avoidance groove is opened at the position where the triangular elastic plate is installed on the outer sleeve.

[0018] Optionally, the outer sleeve is a hollow frame structure, and the outer sleeve and the mounting frame are integrally manufactured structures.

[0019] Optionally, an expansion plate is fixedly connected to the bottom of the inner sleeve. A weakening groove is opened at the connection position between the expansion plate and the inner sleeve. Elastic rods are installed on the inner wall of the expansion plate. Tensile plates are clamped at both ends of the elastic rods.

[0020] Optionally, the elastic rod is a curved elastic structure. A connecting rod is fixedly connected to the middle position of the elastic rod. One side of the connecting rod is fixed to the inner wall of the expansion plate.

[0021] Optionally, clamping grooves adapted to the size of the elastic rods are formed at both ends of the stretching plate.

[0022] Compared with the prior art, the present invention has at least the following beneficial effects:

[0023] In the above solution, the concrete preparation method provided by the present application has a precise design for the process of sampling and testing the concrete after mixing. The concrete mixed in the mixer is transported to the detection component through the sample pipe. Through the detection component, the slump and spread of the concrete can be automatically detected. During the detection process, no manual intervention is required, and all operations of the detection are fully automated. Such a setting not only improves the accuracy of sample detection but also makes the detection efficiency higher.

[0024] By arranging an outer sleeve in the detection component, when it is necessary to detect the concrete, first place the slump cone in the center of the detection plate, and then the operator starts the lifting component. After the lifting component starts, it will first drive the outer sleeve to move downward by a certain distance. During the downward movement of the outer sleeve, it will be clamped and fixed with the slump cone. When the two are clamped and fixed, the slump cone can be assisted and fixed by the outer sleeve. Under the limiting action of the outer sleeve, the stability of the slump cone can be improved, so as to ensure that the slump cone will not swing and shake during the concrete filling process, and thus the concrete will not leak laterally, improving the accuracy of the detection by the detection component. When the concrete filling is completed, the lifting component drives the outer sleeve to drive the slump cone to move upward. During the upward movement of the slump cone, the concrete inside it will collapse onto the detection plate. Since the centers of the outer sleeve, the slump cone, and the detection plate are on the same axis, the slump cone always remains perpendicular to the detection plate during the lifting process, and thus the detected data is more accurate.

[0025] By arranging an inner sleeve inside the detection component, an expansion plate is provided at the end of the inner sleeve. The expansion plate is of a segmented structure and elastic rods are installed on its inner wall. The two ends of the elastic rods are clamped and fixed to a tension plate. Before the slump cone is lifted, the expansion plate is located at the top of the slump cone. During the process of lifting the slump cone, the inner sleeve will gradually extend into the interior of the slump cone. Since the slump cone is of a conical structure, under the action of the elastic force of the elastic rods, the tension plate will push the expansion plate to deform and expand outward, and during the upward movement of the slump cone, the expansion plate always abuts against the inner wall of the slump cone. Since the tension plate is installed in the gap of the segmented structure of the expansion plate, the tension plate and the expansion plate can form an entire circular cross-sectional profile. Such a setting enables the tension plate and the expansion plate to scrape off the concrete adhered to the inner wall of the slump cone, preventing the concrete from remaining on the inner wall of the slump cone. The above settings enable the slump cone to be lifted without waiting for the concrete to slide off automatically, ensuring that the concrete can quickly fall off after the slump cone is lifted. On the one hand, the detection accuracy is improved, and on the other hand, the detection time is shortened, improving the detection efficiency. Description of the Drawings

[0026] The drawings incorporated herein and constituting a part of the specification illustrate embodiments of the present invention and, together with the specification, are further used to explain the principles of the present invention and enable those skilled in the relevant art to implement and use the present invention.

[0027] Figure 1 It is a three-dimensional structural schematic diagram of the preparation method of high-strength self-compacting concrete;

[0028] Figure 2 It is a magnified three-dimensional structural schematic diagram of the cooperation of the detection mechanism;

[0029] Figure 3 It is a magnified three-dimensional structural schematic diagram of the cooperation of the mounting plate and the slump cone;

[0030] Figure 4 It is a magnified three-dimensional structural schematic diagram of the cooperation of the lifting mechanism and the outer sleeve;

[0031] Figure 5 It is a sectional structural schematic diagram of the cooperation of the outer sleeve and the slump cone before the outer sleeve descends;

[0032] Figure 6 For Figure 5 The enlarged three-dimensional structural schematic diagram at A in

[0033] Figure 7 It is a sectional structural schematic diagram of the cooperation of the outer sleeve and the slump cone after the outer sleeve descends;

[0034] Figure 8 For Figure 7 The enlarged three-dimensional structural schematic diagram at B in

[0035] Figure 9 Schematic enlarged three-dimensional structure diagram of the slump cone and the V-shaped clamping plate in cooperation

[0036] Figure 10 Schematic enlarged three-dimensional structure diagram of the outer sleeve

[0037] Figure 11 For Figure 10 Schematic enlarged three-dimensional structure diagram of the C position in

[0038] Figure 12 Schematic sectional structure diagram of the sample tube, inner sleeve and slump cone in cooperation

[0039] Figure 13 For Figure 12 Schematic enlarged three-dimensional structure diagram of the D position in

[0040] Figure 14 For Figure 12 Schematic enlarged three-dimensional structure diagram of the E position in

[0041] Figure 15 Schematic sectional three-dimensional structure diagram of the inner sleeve, elastic rod and tension plate in cooperation

[0042] Figure 16 Schematic enlarged three-dimensional structure diagram of the elastic rod and the tension plate in cooperation

[0043] Figure 17 For Figure 16 Schematic enlarged three-dimensional structure diagram of the F position in

[0044] Reference numerals:

[0045] 1. Body; 101. Frame; 2. Sample tube; 201. Electric control valve; 202. Water delivery pipe; 3. Mounting plate; 301. Detection plate; 4. Lifting mechanism; 401. Mounting frame; 5. Outer sleeve; 501. Triangular elastic plate; 502. Concave part; 503. Connecting plate; 504. Clamping plate; 505. First avoidance groove; 506. Second avoidance groove; 6. Inner sleeve; 601. Expansion plate; 602. Weakening groove; 603. Elastic rod; 604. Connecting rod; 605. Tension plate; 606. Clamping groove; 7. Slump cone; 701. V-shaped clamping plate; 702. Partition board.

[0046] As shown in the figure, in order to clearly implement the structure of the embodiments of the present invention, specific structures and devices are marked in the figure, but this is only for schematic needs and is not intended to limit the present invention to this specific structure, device and environment. Those of ordinary skill in the art can adjust or modify these devices and environments according to specific needs. Detailed implementation manners

[0047] The following is a detailed description of a preparation method of high-strength self-compacting concrete provided by the present invention in conjunction with the accompanying drawings and specific embodiments. At the same time, it should be noted here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments. For some well-known technologies, those skilled in the art can also adopt other alternative methods for implementation; moreover, the accompanying drawings are only for more specifically describing the embodiments, and are not intended to specifically limit the present invention.

[0048] It should be noted that in the specification, references to "one embodiment", "an embodiment", "exemplary embodiments", "some embodiments", etc. indicate that the described embodiments may include specific features, structures, or characteristics, but not every embodiment necessarily includes the specific feature, structure, or characteristic. Additionally, when combining embodiments to describe a specific feature, structure, or characteristic, implementing such a feature, structure, or characteristic in combination with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the relevant art.

[0049] Generally, terms can be understood, at least in part, from their use in context. For example, at least in part depending on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or can be used to describe a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey a set of exclusive factors, but rather, at least in part depending on the context, can allow for the existence of other factors that are not necessarily explicitly described.

[0050] It can be understood that the meanings of "on...", "above...", and "over..." in the present invention should be interpreted in the broadest manner, such that "on..." not only means "directly on" something, but also includes the meaning of being "on" something with intervening features or layers therebetween, and "above..." or "over..." not only means "above" or "over" something, but also can include the meaning of being "above" or "over" something with no intervening features or layers therebetween.

[0051] In addition, spatial relative terms such as "under...", "below...", "lower", "above...", "upper", etc. are used herein for convenience of description to describe the relationship of one element or feature to another or other elements or features, as shown in the accompanying drawings. Spatial relative terms are intended to cover different orientations in the use or operation of the device other than the orientation depicted in the accompanying drawings. The device can be oriented in another manner, and the spatial relative descriptive terms used herein can be similarly interpreted accordingly.

[0052] As Figures 1 to 4 shown, an embodiment of the present invention provides a preparation method of high-strength self-compacting concrete, including the following steps:

[0053] Step 1. Material preparation: Use metering equipment to accurately measure cementitious materials, aggregates, admixtures, and water. The cementitious materials mainly include Portland cement or ordinary Portland cement, and may also include mineral admixtures such as fly ash, granulated blast furnace slag powder, silica fume, etc. according to the product requirements of the project; the aggregates include coarse aggregates and fine aggregates. The coarse aggregates are of continuous grading, and the maximum nominal particle size should not be greater than 20 mm. Medium sand is used as the fine aggregate; the admixtures mainly include high-range water reducers, and also include expansion agents, air-entraining agents, defoaming agents, etc.;

[0054] Step 2. Mix proportion design: Design the mix proportion according to the project requirements. When designing the mix proportion, self-compacting performance, strength, durability, etc. should be considered. First, determine the concrete mixing strength (fcu,o), fcu,o = fcu,k + 1.645σ. Where fcu,k is the standard value of the concrete cube compressive strength, and σ is the standard deviation of the concrete strength; then determine the water-cementitious material ratio. Determine the water-cementitious material ratio according to the regression coefficient and the type of aggregate to ensure the durability of the concrete. Among them, the water-cementitious material ratio is less than 0.45, and the dosage of cementitious materials should be controlled between 400 kg / m 3 and 550 kg / m 3 ; then select the unit mixing water consumption of the concrete. The determination of the water consumption is based on the dryness and plasticity of the concrete; finally, add an appropriate amount of mineral admixtures such as fly ash, granulated blast furnace slag powder, silica fume, etc. to adjust the rheological properties of the concrete;

[0055] Step 3. Mixing: Use a mixer to first mix the fine aggregate and coarse aggregate evenly, then add sodium polyacrylate, dispersant, expansion agent, limestone powder particles, and cement and mix them evenly. Finally, add the water reducer and mix evenly, and then add water and mix evenly. The mixing time is not less than 60 seconds and is appropriately extended compared with non-self-compacting concrete;

[0056] Step 4. Sampling and testing: Take samples from the mixer using a sampling bucket. After ensuring that the inner wall and bottom plate of the slump cone 7 are wet without free water, place the slump cone 7 on the detection surface of a solid and horizontal bottom plate. The slump cone 7 is placed in the center of the bottom plate. The operator steps on the foot pedals on both sides of the slump cone 7 to ensure that the slump cone 7 remains in a fixed position during the loading process. Fill the material in the sampling bucket into the slump cone 7. After the material is filled, remove the loading funnel on the top of the slump cone 7, and scrape off the excess concrete mixture and level it along the barrel mouth. Then the operator vertically and steadily lifts the slump cone 7. After the material in the slump cone 7 completely falls off, gently place the slump cone 7 beside the sample. When the sample on the bottom plate no longer continues to slump or the slumping time reaches 30 seconds, the operator observes, measures, and records the data;

[0057] Step 5. Transportation and pouring: Transport the materials meeting the project requirements to the project site by a concrete mixer truck, and take measures such as sun protection and cold protection during transportation. When pouring self-compacting concrete, a dedicated person is on-site for monitoring to ensure that the self-compacting property of the concrete meets the requirements. After the self-compacting concrete is poured, promptly adopt curing measures such as covering, water storage, film moisture preservation, spraying or brushing a curing agent, etc. The curing time shall not be less than 14 days. The mixer includes a machine body 1 and a mounting plate 3. The bottom of the machine body 1 is fixedly connected with a frame 101. One side of the bottom of the machine body 1 is fixedly connected with a sample tube 2. The top of the sample tube 2 is fixedly connected with a water delivery pipe 202. An electric control valve 201 is fixedly connected to the sample tube 2. The bottom of the mounting plate 3 is fixedly connected with a detection plate 301. A slump cone 7 is placed on the top of the detection plate 301; a detection component, which is used to detect the slump and spread of the concrete in the machine body 1, and the detection component is respectively connected to the sample tube 2 and the mounting plate 3. The concrete preparation method provided by the present application has a precise design for the process of sampling and detecting the concrete after mixing. Among them, the concrete mixed in the mixer is transported to the detection component through the sample tube 2, and the detection component can automatically detect the slump and spread of the concrete. No manual intervention is required during the detection process, and all operations of the detection are fully automated. Such a setting not only improves the accuracy of sample detection but also makes the detection efficiency higher.

[0058] Specifically, during the actual operation process, the mixed concrete does not need to be taken out of the machine body 1 of the mixer. The operator only needs to open the electric control valve 201 on the console. Here, the sample tube 2 is installed at the bottom of the machine body 1, so that the concrete in the machine body 1 will automatically flow out along the sample tube 2 under the action of gravity after the electric control valve 201 is opened. The concrete in the sample tube 2 will finally flow into the detection component, and then the detection operations of the slump and expansion degree are automatically realized through the detection component. In the above scheme, a flow sensor is installed in the sample tube 2 where the electric control valve 201 is installed. Since the size of the slump cone 7 is fixed, the volume of the concrete filled into the slump cone 7 each time is also fixed. Here, when the electric control valve 201 is opened, the flow rate of the concrete flowing out of the sample tube 2 will be detected by the flow sensor. When the flow rate reaches the dose required for the slump cone 7, the console will automatically control the electric valve to close, without the need for manual observation and control of the dose of the concrete filled into the slump cone 7. Such a setting can not only prevent the phenomenon of excessive concrete outflow and waste, but also ensure that the volume of the concrete filled into the slump cone 7 is consistent each time, thereby improving the accuracy of the slump cone 7 in detecting the slump and spread of the concrete.

[0059] Furthermore, a water delivery pipe 202 is installed at the end of the sample tube 2, and a check valve is installed at the connection end of the water delivery pipe 202 and the sample tube 2. The setting of this check valve prevents the concrete in the sample tube 2 from entering the water delivery pipe 202. The other end of the water delivery pipe 202 is connected to an external water source. After the device is used, the user can inject clean water into the sample tube 2 through the water delivery pipe 202 to wash and clean the residual concrete on the inner wall of the sample tube 2 for the next use. In addition, the clean water discharged from the sample tube 2 can also clean the detection component, thereby improving the use efficiency of the entire device.

[0060] The detection component provided in this application is tested using a slump cone 7 in accordance with the national concrete slump test standard. Here, the specifications and dimensions of the slump cone 7 are manufactured according to the standards in the "Test Regulations for Cement and Cement Concrete in Highway Engineering" (JTG 3420 - 2020), the industry standard of the People's Republic of China. Compared with the existing slump cone 7, the slump cone 7 provided in this application does not have two foot pedals at the bottom and does not have a handle for lifting at the top. This can not only reduce the manufacturing cost of the slump cone 7 but also reduce the processing technology, making the slump cone 7 provided in this application easier to mass-produce and transport.

[0061] As an implementation manner in this embodiment, such as Figures 1 to 11As shown in the figure, the detection component includes an inner sleeve 6 screwed to the bottom of the sample tube 2, and also includes a lifting mechanism 4 fixedly connected to one side of the mounting plate 3. One side of the lifting mechanism 4 is fixedly connected with a mounting frame 401. One end of the mounting frame 401 is fixedly connected with an outer sleeve 5. The bottom of the outer sleeve 5 is fixedly connected with a triangular elastic plate 501. The top of the slump cone 7 is fixedly connected with a V-shaped clamping plate 701 adapted to the contour of the triangular elastic plate 501. A recess 502 is provided at the top of the triangular elastic plate 501. Connecting plates 503 are symmetrically installed at the top of the triangular elastic plate 501. A clamping plate 504 is fixedly connected to the top of the connecting plate 503. A partition plate 702 is fixedly connected to the inner circumference of the V-shaped clamping plate 701. A second avoidance groove 506 adapted to the size of the partition plate 702 is provided at the bottom of the outer sleeve 5. A first avoidance groove 505 is provided at the position where the triangular elastic plate 501 is installed on the outer sleeve 5. The outer sleeve 5 is a hollow frame structure. The outer sleeve 5 and the mounting frame 401 are integrally manufactured structures. The detection component provided in this application is mainly used for the detection of the slump and spread of concrete. Only relying on the lifting mechanism 4 as a single driving unit to drive all operations of the component within the detection component, such a setting can minimize the investment cost of the device, and make the detection component simpler in the actual operation process, improving the efficiency of the entire detection process. Here, the lifting mechanism 4 is a stepper driving mechanism, mainly composed of components such as a stepper motor, a lead screw, a coupling, a bearing, and a guide rail. Its working principle is based on the control characteristics of the stepper motor. The stepper motor controls the rotation angle and speed of the lead screw by receiving pulse signals, and then converts it into a linear motion through a mechanical structure to achieve the lifting action. Here, the working principle of the lifting mechanism 4 is publicly known as the prior art, so it will not be elaborated too much. The lifting end of the lifting mechanism 4 is installed with a mounting frame 401. The outer sleeve 5 installed at one end of the mounting frame 401 is concentric with the center of the detection plate 301. Such a setting makes it that when the user places the slump cone 7 at the center position of the detection plate 301, the outer sleeve 5 will always maintain a relatively perpendicular state with the slump cone 7 during the lifting process. It is worth mentioning that the lifting mechanism 4 is installed and fixed through the mounting plate 3. The detection plate 301 is provided with scales for detecting the slump and spread for detection and measurement. Among them, the mounting plate 3 and the detection plate 301 are integrally manufactured structures. Such a setting improves the structural compactness of the device, making the device more efficient in the production and assembly process.

[0062] The detection component mainly includes an inner sleeve 6 and an outer sleeve 5. One end of the top of the inner sleeve 6 is screwed together with the end of the sample tube 2. One end of the bottom of the inner sleeve 6 is just located at the top of the slump cone 7, and the bottom end of the inner sleeve 6 slightly extends into the slump cone 7 for a certain distance. Such a setting enables the concrete flowing out of the sample tube 2 to directly flow into the slump cone 7 along the inner sleeve 6 without any side leakage phenomenon, improving the accuracy of the detection.

[0063] When concrete needs to be tested, first place the slump cone 7 at the center of the test plate 301, and then the operator activates the lifting component. After the lifting component is activated, it will first drive the outer sleeve 5 to move downward for a certain distance. As described above, the axis of the outer sleeve 5 is concentric with the center of the test plate 301. Therefore, the position of the triangular elastic plate 501 on the outer sleeve 5 corresponds to the V-shaped clamping plate 701 on the slump cone 7. So, during the downward movement of the outer sleeve 5, the triangular elastic plate 501 will be smoothly clamped into the V-shaped clamping plate 701. Specifically, the triangular elastic plate 501 is an elastic structure with a triangular structural contour. A recess 502 is provided at the top of the triangular elastic plate 501. The setting of the recess 502 makes the triangular elastic plate 501 prone to deformation towards the position where the recess 502 is located under the extrusion of an external force, thereby making the overall contour of the triangular elastic plate 501 become flat. The contour of the V-shaped clamping plate 701 on the slump cone 7 is a "V" - shaped structure, and this structure setting just forms a fit with the triangular contour of the triangular elastic plate 501 (as Figure 5 and Figure 6 shown). Therefore, when the outer sleeve 5 moves downward, the triangular elastic plate 501 will be extruded and deformed by the V-shaped clamping plate 701, and its body will become flat during the deformation process. During the continuous downward movement of the outer sleeve 5, the flattened triangular elastic plate 501 will pass through the gap at the bottom of the V-shaped clamping plate 701 until the triangular elastic plate 501 completely passes through the V-shaped clamping plate 701. Then, under the elastic action, the triangular elastic plate 501 will regain its deformation. At this time, the triangular elastic plate 501 and the V-shaped clamping plate 701 will form a clamping fit in terms of structure, making the outer sleeve 5 and the slump cone 7 clamped together (as Figure 7 and Figure 8 shown). In the above solution, after the lifting mechanism 4 is activated, it will first drive the outer sleeve 5 to move downward for a certain distance. During the movement of the outer sleeve 5, the outer sleeve 5 and the slump cone 7 are clamped together with the help of the triangular elastic plate 501 and the V-shaped clamping plate 701. Here, the triangular structure of the triangular elastic plate 501 and the "V" - shaped structure of the V-shaped clamping plate 701 enable the two to be assisted in guiding during the clamping process by means of the inclined contour, making it easier for the two to be aligned and inserted. Even if the user does not place the slump cone 7 exactly at the center of the test plate 301, the triangular elastic plate 501 and the V-shaped clamping plate 701 can also assist in making the outer sleeve 5 and the slump cone 7 clamped together with the help of the guiding effect of the structure. When the two are clamped and fixed, the outer sleeve 5, the slump cone 7, and the lifting mechanism 4 form an integral driving structure. At this time, the slump cone 7 can be assisted in being fixed by the outer sleeve 5. After the operator opens the electromagnetic valve 201, the concrete in the machine body 1 will be filled into the slump cone 7 along the sample tube 2 and the inner sleeve 6 in sequence. Under the limiting action of the outer sleeve 5, the stability of the slump cone 7 can be improved, thereby ensuring that the slump cone 7 will not swing or shake during the concrete filling process, and further preventing the concrete from leaking sideways, improving the accuracy of the detection component during detection.

[0064] After the concrete is filled, the lifting component drives the outer sleeve 5 to drive the slump cone 7 to move upward. During the upward movement of the slump cone 7, the concrete inside it will slump onto the detection plate 301. When the concrete in the slump cone 7 no longer slumps or the slumping time reaches 30 seconds, the operator can perform data measurement and recording. Since the centers of the outer sleeve 5, the slump cone 7, and the detection plate 301 are on the same axis, the slump cone 7 always remains perpendicular to the detection plate 301 during the lifting process, thus making the detected data more accurate.

[0065] When the detection component is used up, the user can lift the buckle 504 at the top of the triangular elastic plate 501 upward to release the limit between the triangular elastic plate 501 and the V-shaped clamping plate 701. Specifically, after the buckle 504 is lifted, it will drive the triangular elastic plate 501 to deform. At this time, the recess 502 at the top of the triangular elastic plate 501 will become straight under the pulling action of the buckle 504. At the same time, the inclined structures on both sides of the triangular elastic plate 501 will also become straight, so that the contour of the triangular elastic plate 501 becomes flat again and can pass through the V-shaped clamping plate 701 again. After the triangular elastic plate 501 passes through the V-shaped clamping plate 701 from bottom to top, the limit between the outer sleeve 5 and the slump cone 7 will be released. At this time, the operator can remove the slump cone 7 from the outer sleeve 5. Such a setting is to facilitate the user to clean, maintain, and replace the slump cone 7 separately, and improve the service life of the device. Further, in the above operation process, a first avoidance groove 505 is provided on the triangular elastic plate 501. The first avoidance groove 505 is to make way for the displacement amount of the triangular elastic plate 501 deformed by the user pulling the buckle 504 upward. Secondly, the second avoidance groove 506 on the triangular elastic plate 501 is to allow the outer sleeve 5 to avoid the partition plate 702 on the V-shaped clamping plate 701 during the downward pressing process. It is worth mentioning that the bending position of the recess 502 is thinned, such a setting makes the recess 502 easier to deform under the extrusion of external force, so as to be more conducive to the clamping and fixing between the outer sleeve 5 and the slump cone 7.

[0066] In this embodiment, as Figures 12 to 17As shown in the figure, a spreading plate 601 is fixedly connected to the bottom of the inner sleeve 6. A weakening groove 602 is provided at the connection position between the spreading plate 601 and the inner sleeve 6. Elastic rods 603 are installed on the inner wall of the spreading plate 601. Tensile plates 605 are clamped at both ends of the elastic rods 603. The elastic rods 603 are of a curved elastic structure. A connecting rod 604 is fixedly connected to the middle position of the elastic rod 603. One side of the connecting rod 604 is fixed to the inner wall of the spreading plate 601. Clamping grooves 606 adapted to the size of the elastic rods 603 are provided at both ends of the tensile plates 605. As previously described, the inner sleeve 6 and the sample tube 2 are screwed and fixed together. Therefore, during the process of the outer sleeve 5 driving the slump cone 7 to move upward, the inner sleeve 6 will not displace. An end portion of the inner sleeve 6 is provided with the spreading plate 601. The spreading plate 601 is of a segmented structure and a weakening groove 602 is provided at the connection position between the spreading plate 601 and the inner sleeve 6. The weakening groove 602 thins the connection position between the two, making it easier for the spreading plate 601 to deform under the extrusion of an external force. Elastic rods 603 are installed on the inner wall of the spreading plate 601. The elastic rods 603 are of a curved elastic structure. The middle position of the elastic rod 603 is fixed to the spreading plate 601 through the connecting rod 604. The remaining positions of the elastic rod 603 are not fixed to the spreading plate 601. Tensile plates 605 are clamped and fixed at both ends of the elastic rod 603. Before the slump cone 7 is lifted, the spreading plate 601 is located at the top of the slump cone 7. During the process of the slump cone 7 being lifted, the inner sleeve 6 will gradually extend into the slump cone 7. Since the slump cone 7 is of a conical structure, under the action of the elastic force of the elastic rod 603, the tensile plate 605 will push the spreading plate 601 to deform and expand outward, and make the spreading plate 601 always abut against the inner wall of the slump cone 7 during the process of the slump cone 7 moving upward. Since the tensile plate 605 is installed in the gap of the segmented structure of the spreading plate 601, the tensile plate 605 and the spreading plate 601 can form an entire circular cross-sectional profile. Such a setting enables the tensile plate 605 and the spreading plate 601 to scrape off the concrete adhered to the inner wall of the slump cone 7, preventing the concrete from remaining on the inner wall of the slump cone 7. The above settings enable the slump cone 7 to be lifted without waiting for the concrete to slide off automatically, ensuring that the concrete can quickly fall off after the slump cone 7 is lifted. On the one hand, the detection accuracy is improved. On the other hand, the detection time is shortened and the detection efficiency is improved. Here, the spreading plate 601 is selected to be made of rubber material. The selection of this material makes it easier for the spreading plate 601 to deform. The elastic rods 603 and the tensile plates 605 are clamped and fixed through the clamping grooves 606. Such a connection method enables the tensile plate 605 to be separately disassembled for cleaning and replacement, improving the service life of the device.

[0067] The working principle of the technical solution provided by the present invention is as follows:

[0068] When it is necessary to test the concrete, first place the slump cone 7 at the center of the test plate 301, and then the operator starts the lifting component. After the lifting component starts, it will first drive the outer sleeve 5 to move downward by a certain distance. During the downward movement of the outer sleeve 5, the triangular elastic plate 501 will be clamped into the V-shaped clamping plate 701. The contour of the V-shaped clamping plate 701 is a "V" shape, and the setting of this structure just forms a fit with the triangular contour of the triangular elastic plate 501. Therefore, when the outer sleeve 5 moves downward, the triangular elastic plate 501 will be squeezed and deformed by the V-shaped clamping plate 701, and its body will become flattened during the deformation process. During the continuous downward movement of the outer sleeve 5, the flattened triangular elastic plate 501 will pass through the gap at the bottom of the V-shaped clamping plate 701 until the triangular elastic plate 501 completely passes through the V-shaped clamping plate 701. Then, under the elastic action, the triangular elastic plate 501 will resume its deformation again. At this time, the triangular elastic plate 501 and the V-shaped clamping plate 701 will form a clamping fit in structure, so that the outer sleeve 5 and the slump cone 7 are clamped together. When the two are clamped and fixed, the outer sleeve 5, the slump cone 7 and the lifting mechanism 4 become a whole driving structure. At this time, the slump cone 7 can be assisted and fixed by means of the outer sleeve 5. After the operator opens the electric control valve 201, the concrete in the machine body 1 will be filled into the slump cone 7 along the sample tube 2 and the inner sleeve 6 in sequence. Under the limiting action of the outer sleeve 5, the stability of the slump cone 7 can be improved, so as to ensure that the slump cone 7 will not swing during the concrete filling process, and thus the concrete will not leak laterally, improving the accuracy of the detection by the detection component.

[0069] After the concrete is filled, the lifting assembly drives the outer sleeve 5 to drive the slump cone 7 to move upward. During the upward movement of the slump cone 7, the concrete inside it will slump onto the detection plate 301. When the concrete in the slump cone 7 no longer slumps or the slumping time reaches 30 seconds, the operator can perform data measurement and recording. Since the centers of the outer sleeve 5, the slump cone 7, and the detection plate 301 are on the same axis, the slump cone 7 always remains perpendicular to the detection plate 301 during the lifting process, thus making the detected data more accurate. Since the inner sleeve 6 and the sample tube 2 are fixedly connected by screwing, the inner sleeve 6 will not displace during the process of the outer sleeve 5 driving the slump cone 7 to move upward. An expansion plate 601 is provided at the end of the inner sleeve 6. The expansion plate 601 is arranged in a segmented structure, and a weakening groove 602 is provided at the connection position between the expansion plate 601 and the inner sleeve 6. The weakening groove 602 thins the connection position between the two, making it easier for the expansion plate 601 to deform under the action of external force. Elastic rods 603 are installed on the inner wall of the expansion plate 601. The elastic rods 603 are curved elastic structures. The middle position of the elastic rods 603 is fixedly connected to the expansion plate 601 through a connecting rod 604, and the rest of the elastic rods 603 are not fixed to the expansion plate 601. Tensile plates 605 are clamped and fixed at both ends of the elastic rods 603. Before the slump cone 7 is lifted, the expansion plate 601 is located at the top of the slump cone 7. During the process of lifting the slump cone 7, the inner sleeve 6 will gradually extend into the slump cone 7. Since the slump cone 7 is a conical structure, under the action of the elastic force of the elastic rods 603, the tensile plates 605 will push the expansion plate 601 to deform and expand outward, and make the expansion plate 601 always abut against the inner wall of the slump cone 7 during the upward movement of the slump cone 7. Since the tensile plates 605 are installed in the gaps of the segmented structure of the expansion plate 601, the tensile plates 605 and the expansion plate 601 can form a complete circular cross-sectional profile. Such a setting enables the tensile plates 605 and the expansion plate 601 to scrape off the concrete adhered to the inner wall of the slump cone 7, preventing the concrete from remaining on the inner wall of the slump cone 7. The above settings enable the slump cone 7 to be lifted without waiting for the concrete to slide off automatically, ensuring that the concrete can quickly fall off after the slump cone 7 is lifted. On the one hand, it improves the accuracy of the detection, and on the other hand, it shortens the detection time and improves the detection efficiency. Here, the expansion plate 601 is made of rubber material, and this material selection makes it easier for the expansion plate 601 to deform. The elastic rods 603 and the tensile plates 605 are clamped and fixed through a clamping groove 606. Such a connection method enables the tensile plates 605 to be separately disassembled for cleaning and replacement, improving the service life of the device.

[0070] After the detection component is used up, the user can lift the buckle plate 504 at the top of the triangular elastic plate 501 upward to release the limit between the triangular elastic plate 501 and the V-shaped clamping plate 701. Specifically, when the buckle plate 504 is lifted, it will drive the triangular elastic plate 501 to deform. At this time, the concave part 502 at the top of the triangular elastic plate 501 will become flat under the pulling action of the buckle plate 504. At the same time, the inclined structures on both sides of the triangular elastic plate 501 will also become flat, so that the outline of the triangular elastic plate 501 becomes flat again and can pass through the V-shaped clamping plate 701 again. After the triangular elastic plate 501 passes through the V-shaped clamping plate 701 from bottom to top, the outer sleeve 5 and the slump cone 7 will be released from the limit. At this time, the operator can remove the slump cone 7 from the outer sleeve 5. Such a setting is to facilitate the user to clean, maintain and replace the slump cone 7 separately, improve the service life of the device. The user can inject clean water into the sample tube 2 through the water delivery pipe 202 to wash the residual concrete on the inner wall of the sample tube 2 for the next use. The clean water discharged from the sample tube 2 can also clean the detection component, thereby improving the use efficiency of the whole device.

[0071] The present invention covers any alternatives, modifications, equivalent methods and solutions made within the spirit and scope of the present invention. To enable the public to have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention. However, those skilled in the art can fully understand the present invention without the description of these details. In addition, well-known methods, processes, procedures, components and circuits are not described in detail to avoid unnecessary confusion to the essence of the present invention.

[0072] The above is only a preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A preparation method of high-strength self-compacting concrete, characterized in that, It includes the following steps: Step 1, Material preparation: Use measuring equipment to accurately measure cementitious materials, aggregates, admixtures and water; Step 2, Mix proportion design: Design the mix proportion according to the engineering requirements. When designing the mix proportion, self-compacting performance, strength, durability, etc. should be considered; Step 3, Mixing: Use a mixer to first mix the fine aggregate and coarse aggregate evenly; Step 4, Sampling and testing: Use a sampling bucket to take samples from the mixer. Place the slump cone in the center of the test plate. Then the operator starts the lifting component. After the lifting component starts, it will first drive the outer sleeve to move downward for a certain distance. During the downward movement of the outer sleeve, it will be clamped and fixed with the slump cone. When the two are clamped and fixed, the slump cone can be assisted in fixing by means of the outer sleeve. When the concrete is filled, the lifting component drives the outer sleeve to drive the slump cone to move upward. During the upward movement of the slump cone, the concrete inside it will collapse onto the test plate. Since the centers of the outer sleeve, slump cone and test plate are on the same axis, the slump cone always remains perpendicular to the test plate during the lifting process. After the material in the slump cone has completely fallen off, gently place the slump cone beside the sample. When the sample on the bottom plate no longer collapses or the collapse time reaches 30 seconds, the operator observes, measures and records the data; The mixer includes a machine body and a mounting plate. The bottom of the machine body is fixedly connected with a frame. One side of the bottom of the machine body is fixedly connected with a sample tube. The top of the sample tube is fixedly connected with a water delivery pipe. An electric control valve is fixedly connected to the sample tube. The bottom of the mounting plate is fixedly connected with a test plate. The slump cone is placed on the top of the test plate; A detection component, which is used to detect the slump and spread of the concrete in the machine body, and the detection component is respectively connected with the sample tube and the mounting plate; The detection component includes an inner sleeve screwed at the bottom of the sample tube, and also includes a lifting mechanism fixedly connected to one side of the mounting plate. One side of the lifting mechanism is fixedly connected with a mounting frame, and one end of the mounting frame is fixedly connected with an outer sleeve; The bottom of the outer sleeve is fixedly connected with a triangular elastic plate, and the top of the slump cone is fixedly connected with a V-shaped clamping plate adapted to the contour of the triangular elastic plate; A concave portion is provided at the top of the triangular elastic plate, and connecting plates are symmetrically installed at the top of the triangular elastic plate. The top of the connecting plate is fixedly connected with a clamping plate; The bottom of the inner sleeve is fixedly connected with an expansion plate. A weakening groove is provided at the connection position between the expansion plate and the inner sleeve. Elastic rods are installed on the inner wall of the expansion plate, and tension plates are clamped at both ends of the elastic rods; 2. The preparation method of the high-strength self-compacting concrete according to claim 1, characterized in that, A partition is fixedly connected to the inner circumference of the V-shaped clamping plate. A second avoidance groove adapted to the size of the partition is provided at the bottom of the outer sleeve. A first avoidance groove is provided at the position where the triangular elastic plate is installed on the outer sleeve; 3. The preparation method of the high-strength self-compacting concrete according to claim 1, characterized in that, The outer sleeve is a hollow frame structure, and the outer sleeve and the mounting frame are integrally manufactured structures; 4. The preparation method of the high-strength self-compacting concrete according to claim 1, characterized in that, The elastic rod is a curved elastic structure. A connecting rod is fixedly connected to the middle position of the elastic rod, and one side of the connecting rod is fixed to the inner wall of the expansion plate; 5. The preparation method of the high-strength self-compacting concrete according to claim 1, characterized in that, Clamping grooves adapted to the dimensions of the elastic rods are formed at both ends of the stretching plate.

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