A processing method for prewet aggregate concrete

Abstract

The present invention relates to the field of concrete processing, and in particular to a processing method for pre-wet aggregate concrete, comprising: determining a wall panel processing method according to a particle size qualified parameter state; the wall panel processing method is to adjust a crushing parameter, or to adjust a screening time; in the adjustment of the crushing parameter, the crushing frequency and the crushing force are adjusted according to a particle size uniformity difference; for a crack image to be analyzed of a wall panel specimen after fracturing detection, a crack processing mode is determined according to the number of crack areas; in the detection of the crack distribution state, a wall panel specimen processing method is determined according to the crack distribution state, the wall panel specimen processing method is to adjust the number of pressure-dividing steel plates or the wall spacing, the concrete processing parameters are correspondingly adjusted according to the actual preparation effect, and the comprehensive use of ultrasonic detection and fracturing detection reduces the loss of materials caused by fracturing detection while improving the accuracy of the detection result.

Description

Technical Field

[0001] The invention relates to the field of concrete processing, and in particular to a processing method of prewet aggregate concrete. Background Art

[0002] Prewet aggregate concrete is a new type of green building material. The prewet aggregate method can effectively reduce the amount of cement in concrete, thereby saving cement resources. In addition, prewetting can make full use of the porous water storage properties of aggregates, reduce the cement-water ratio of concrete, and form a porous system of concrete while improving strength, reducing density, and enhancing plasticity. It is one of the green building materials that are being promoted today. However, in the actual processing of prewet aggregate concrete, the strength of the wall panels made from prewet aggregate concrete sometimes cannot meet actual needs. The amount of aggregate and the uniformity of aggregate have an impact on the strength of the wall. At present, common strength detection methods include ultrasonic detection and press detection, but ultrasonic detection is easily affected by other factors such as the environment, resulting in poor detection effect. Press detection will cause damage to the wall, and multiple detection conditions will lead to large material loss. Therefore, how to efficiently detect the strength of concrete walls and effectively adjust the processing parameters is a problem that technicians in this field need to solve urgently.

[0003] Chinese patent publication number CN110790543A discloses a method for preparing a construction waste recycled coarse aggregate concrete wall panel, comprising: selecting construction waste with a particle size of 5 mm to 80 mm as coarse aggregate, soaking the coarse aggregate, using a mixer to evenly mix fine aggregate, cement, sand and mixing water, then adding the soaked coarse aggregate to evenly mix to obtain concrete, and using the concrete to cast to obtain a construction waste recycled coarse aggregate concrete wall panel. In addition, Chinese patent publication number CN114477866A discloses a method for processing pre-wet porous basalt aggregate concrete, including: step 1: crushing porous basalt, screening to obtain porous basalt fine material with a particle size of 4.75-10mm, and porous basalt coarse material with a particle size greater than 10mm and less than or equal to 19mm; step 2: soaking and humidifying the porous basalt coarse material with water for 40-55h, and then taking out the porous basalt coarse material to obtain the pre-wetted porous basalt coarse material; step 3: weighing the raw materials according to the raw material formula of concrete, pouring them into a mixer and stirring them evenly to form a mixture. It can be seen that although the above technical solution discloses the technical means of using aggregate concrete to prepare wall panels, it does not consider how to effectively adjust the processing parameters according to the strength of the concrete wall, resulting in poor processing efficiency of concrete wall panels. Summary of the invention

[0004] To this end, the present invention provides a method for processing prewet aggregate concrete, so as to overcome the problem in the prior art that the processing parameters cannot be effectively adjusted according to the strength of the concrete wall, resulting in poor processing efficiency of the concrete wallboard.

[0005] To achieve the above object, the present invention provides a method for processing prewet aggregate concrete, comprising:

[0006] Conducting ultrasonic testing on a target sub-area of ​​a target concrete wall panel to determine a particle size qualified parameter state, and determining a wall panel treatment method according to the particle size qualified parameter state;

[0007] The wallboard processing method is to adjust the crushing parameters or the screening time;

[0008] In the adjustment of crushing parameters, the crushing frequency and crushing intensity are adjusted according to the difference in particle size uniformity;

[0009] Under the fracturing detection conditions, the preset fracturing detection rules are used to perform fracturing detection on the wallboard specimen;

[0010] For the crack image to be analyzed of the wallboard specimen after the fracturing test, the crack treatment mode is determined according to the number of crack areas;

[0011] The crack treatment mode is to adjust the amount of aggregate, or to detect the crack distribution state;

[0012] In the detection of the crack distribution state, the wall panel specimen treatment method is determined according to the crack distribution state. The wall panel specimen treatment method is to adjust the number of pressure-dividing steel plates or the wall spacing.

[0013] Further, the target concrete wall panel is divided into sub-areas to determine a number of target sub-areas, ultrasonic testing is performed on each target sub-area to determine the particle size qualified parameter state, and the wall panel treatment method is determined according to the particle size qualified parameter state;

[0014] If the particle size qualified parameter state is in the first preset particle size qualified parameter state, adjusting the crushing parameters;

[0015] If the particle size qualification parameter state is in the second preset particle size qualification parameter state, the screening time is adjusted.

[0016] Furthermore, the first preset particle size qualified parameter state is that the particle size uniformity is less than the preset particle size uniformity and the particle size is qualified, and the second preset particle size qualified parameter state is that the particle size uniformity is greater than or equal to the preset particle size uniformity and the particle size is unqualified.

[0017] Furthermore, in adjusting the crushing parameters, the particle size uniformity difference is calculated according to the particle size uniformity and the preset particle size uniformity, and the crushing frequency is increased and the crushing intensity is decreased according to the particle size uniformity difference;

[0018] The increase in the crushing frequency is positively correlated with the difference in particle size uniformity;

[0019] The reduction in the crushing force is positively correlated with the difference in particle size uniformity.

[0020] Furthermore, in adjusting the screening time, the number of sonic wave velocities within the range to be adjusted is counted, and the screening time is increased and adjusted, and the increase in the screening time is positively correlated with the number of sonic wave velocities within the range to be adjusted.

[0021] Further, under the fracturing detection condition, a preset fracturing detection rule is used to perform fracturing detection on the wallboard specimen, and a crack image to be analyzed of the wallboard specimen is obtained, the number of crack areas is detected, and a crack treatment mode is determined according to the number of crack areas;

[0022] If the number of crack regions is within a first preset range of the number of crack regions, adjusting the amount of aggregate;

[0023] If the number of crack regions is within a second preset range of the number of crack regions, detecting the crack distribution state;

[0024] Wherein, the fracturing detection condition is that the particle size qualified parameter state is in a third preset particle size qualified parameter state.

[0025] Furthermore, in adjusting the amount of aggregate, the amount of aggregate is reduced according to the number of crack areas.

[0026] The reduction in the amount of aggregate used is positively correlated with the number of crack areas.

[0027] Furthermore, in the detection of the crack distribution state, the wall panel specimen processing method is determined according to the crack distribution state, and the wall panel specimen processing method is to adjust the number of pressure-dividing steel plates or the wall spacing.

[0028] Furthermore, the crack distribution state is in the first preset crack distribution state, and the number of the pressure-dividing steel plates is increased and adjusted, and the increase in the number of the pressure-dividing steel plates is positively correlated with the number of the central crack regions;

[0029] The number of pressure-dividing steel plates is less than the maximum allowable number of pressure-dividing steel plates.

[0030] Furthermore, the crack distribution state is in a second preset crack distribution state, and the wall spacing is adjusted to increase the adjustment, and the increase in the wall spacing is positively correlated with the number of edge crack areas.

[0031] Compared with the prior art, the beneficial effect of the present invention lies in that, in the technical scheme of the present invention, ultrasonic detection is performed on the target sub-area of ​​the target concrete wallboard to determine the particle size qualified parameter state, the wallboard processing method is determined according to the particle size qualified parameter state, the particle size qualified parameter state is used to reflect whether the aggregate distribution is uniform and the wallboard processing method is selected accordingly, the ultrasonic velocity is used to reflect whether the aggregate particle size is uniform, and the influence of the aggregate particle size uniformity on the wallboard strength is considered to make the selection of the wallboard processing method more in line with actual work, and under the fracturing detection condition, the preset fracturing detection rule is used to perform fracturing detection on the wallboard specimen, and the crack processing mode is determined according to the number of crack areas for the crack image to be analyzed of the wallboard specimen after the fracturing detection is completed, and the influence of the aggregate dosage and the number of pressure steel plates on the strength of different areas of the wallboard is considered, so that the crack processing mode is more accurate, thereby increasing the strength of the concrete wallboard. Compared with the prior art, the concrete processing parameters are adjusted accordingly according to the actual preparation effect, so as to ensure the processing effect of the concrete, and the comprehensive use of ultrasonic detection and fracturing detection improves the accuracy of the detection results while reducing the material loss caused by fracturing detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of a processing method of pre-wet aggregate concrete according to an embodiment of the present invention;

[0033] Figure 2 It is a front view schematic diagram of a concrete wall panel according to an embodiment of the present invention;

[0034] Figure 3 A schematic side view of a concrete wall panel according to an embodiment of the present invention;

[0035] In the figure: bottom beam 1, frame member 2, target concrete wall panel 3, connecting member 4, and pressure-dividing steel plate 5. DETAILED DESCRIPTION

[0036] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0037] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0038] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0039] In addition, it should be noted that in the description of the present invention, 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 communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] See also Figures 1 to 3 As shown, the present invention provides a method for processing prewet aggregate concrete, comprising:

[0041] Conducting ultrasonic testing on a target sub-area of ​​a target concrete wall panel to determine a particle size qualified parameter state, and determining a wall panel treatment method according to the particle size qualified parameter state;

[0042] The wallboard processing method is to adjust the crushing parameters or the screening time;

[0043] In the adjustment of crushing parameters, the crushing frequency and crushing intensity are adjusted according to the difference in particle size uniformity;

[0044] Under the fracturing detection conditions, the preset fracturing detection rules are used to perform fracturing detection on the wallboard specimen;

[0045] For the crack image to be analyzed of the wallboard specimen after the fracturing test, the crack treatment mode is determined according to the number of crack areas;

[0046] The crack treatment mode is to adjust the amount of aggregate, or to detect the crack distribution state;

[0047] In the detection of the crack distribution state, the wall panel specimen treatment method is determined according to the crack distribution state. The wall panel specimen treatment method is to adjust the number of pressure-dividing steel plates or the wall spacing.

[0048] A method for preparing the prewet aggregate concrete described in the present invention is provided, comprising: preparing aggregate, using crushed stone as an aggregate component, putting the aggregate into a mixer, adding 50% of water, stirring for 30 seconds to allow the surface and interior of the aggregate to absorb part of the water, adding cement or fly ash as a binder, adding 50% of water, continuing to stir evenly, adding defoaming agent and starch and other admixtures to fully mix, and obtaining prewet aggregate concrete. The 50% water amount = cement amount × cement-water ratio × 50%, so the cement-water ratio is one of the important parameters for regulating the quality of concrete, and needs to be designed and controlled according to actual needs. This is something that can be understood by those skilled in the art and will not be elaborated here.

[0049] See also Figures 2 to 3 As shown, the target concrete wall panel 3 of the present invention is applied to a building wall, and the building wall includes two target concrete wall panels 3, and the two target concrete wall panels are installed on a bottom beam 1. A single target concrete wall panel 3 is connected to the bottom beam and the frame member 2 through four end corner connectors, and the two buildings are connected through a through-set pressure dividing steel plate 5.

[0050] See also Figure 1 As shown, the target concrete wall panel is divided into sub-areas to determine a number of target sub-areas, ultrasonic testing is performed on each target sub-area to determine the particle size qualified parameter state, and the wall panel treatment method is determined according to the particle size qualified parameter state;

[0051] If the particle size qualified parameter state is in the first preset particle size qualified parameter state, adjusting the crushing parameters;

[0052] If the particle size qualification parameter state is in the second preset particle size qualification parameter state, the screening time is adjusted.

[0053] Specifically, the target concrete wall panel is divided into several target sub-areas according to the area, and the area and shape of each target sub-area are the same. A method for dividing the target sub-areas is provided. In the present invention, the target sub-area is rectangular, the length of the target sub-area is equal to 5 / 1 of the length of the target concrete wall panel, the width of the target sub-area is equal to 3 / 1 of the length of the target concrete wall panel, and the number of target sub-areas is 15. The ultrasonic detection is to place the ultrasonic transmitter and the receiving transducer in turn at the center points of the areas of two opposite surfaces of a single target sub-area, set the ultrasonic detection frequency to 30kHz, start sampling after setting relevant test parameters, stop sampling and save data when the ultrasonic wave velocity value and waveform are stable, and record the ultrasonic wave velocity.

[0054] Specifically, the first preset particle size qualified parameter state is that the particle size uniformity is less than the preset particle size uniformity and the particle size is qualified, and the second preset particle size qualified parameter state is that the particle size uniformity is greater than or equal to the preset particle size uniformity and the particle size is unqualified.

[0055] Specifically, the calculation formula for particle size uniformity S is:

[0056]

[0057] Among them, Vi is the ultrasonic wave velocity detected for the i-th target sub-area, i=1,2,3,...,n, n is the total number of target sub-areas, V0 is the average value of the sum of the ultrasonic wave velocities detected for each target sub-area, the preset particle size uniformity is 4, and the unit of ultrasonic wave velocity is km / s; the method for determining whether the particle size is qualified is that if the ultrasonic wave velocities detected in each target sub-area are within the preset ultrasonic wave velocity range, the particle size is determined to be qualified; if the ultrasonic wave velocity detected in any target sub-area is greater than or less than any value within the preset ultrasonic wave velocity range, the particle size is determined to be unqualified, and the values ​​within the preset ultrasonic wave velocity range are all less than 7km / s and greater than 5km / s.

[0058] Specifically, in the adjustment of the crushing parameters, the particle size uniformity difference is calculated according to the particle size uniformity and the preset particle size uniformity, and the crushing frequency is increased and the crushing intensity is decreased according to the particle size uniformity difference;

[0059] The increase in the crushing frequency is positively correlated with the difference in particle size uniformity;

[0060] The reduction in the crushing force is positively correlated with the difference in particle size uniformity.

[0061] Specifically, a hammer crusher is used to crush stones to obtain aggregates, wherein the crushing frequency is the number of times the hammer crusher crushes a single batch of stones, the crushing force is the pressure applied by the crushing component of the hammer crusher to crush the stones when working, and the particle size uniformity difference is the value obtained by subtracting the particle size uniformity from the preset particle size uniformity.

[0062] Specifically, in adjusting the screening time, the number of sonic wave velocities within the range to be adjusted is counted, and the screening time is increased and adjusted, and the increase in the screening time is positively correlated with the number of sonic wave velocities within the range to be adjusted.

[0063] Specifically, the vibrating screen is a commonly used equipment for screening aggregates. It uses the force generated by vibration to make the aggregates pass through sieves of different apertures for graded screening. The screening time is the screening time of the vibrating screen for a single batch of aggregates. By increasing the screening time, the problem of poor screening effect caused by excessive aggregate quantity can be avoided. The values ​​within the control range need to be less than or equal to 5km / s, or greater than or equal to 7km / s.

[0064] Specifically, under the fracturing detection conditions, a preset fracturing detection rule is used to perform fracturing detection on the wallboard specimen, and a crack image to be analyzed of the wallboard specimen is obtained, the number of crack areas is detected, and a crack treatment mode is determined according to the number of crack areas;

[0065] If the number of crack regions is within a first preset range of the number of crack regions, adjusting the amount of aggregate;

[0066] If the number of crack regions is within a second preset range of the number of crack regions, detecting the crack distribution state;

[0067] Wherein, the fracturing detection condition is that the particle size qualified parameter state is in a third preset particle size qualified parameter state.

[0068] Specifically, the area of ​​the wall panel specimen is smaller than the target concrete wall panel, and the preset fracturing detection rule is to use an electro-hydraulic servo pressure testing machine to apply a load to the wall panel specimen, with 5 kN as one level, and increase the load step by step until the load reaches the user's required load. The user's required load is set by the user, and the user's required load is related to the user's demand for the compressive resistance of the target concrete wall panel. The greater the user's demand for the compressive resistance of the target concrete wall panel, the greater the user's required load. When the load reaches the user's required load, an industrial camera is used to take an image of the wall panel specimen and record it as a cracking image to be analyzed. The value within the first preset crack area number range is less than the preset crack area number, and the value within the second preset crack area number range is greater than or equal to the preset crack area number. The crack area number is a number of rectangular specimen sub-areas into which the wall panel specimen is divided, and the area of ​​each of the several specimen sub-areas is the same. The preset crack area number is 50% of the total number of specimen sub-areas.

[0069] Specifically, in adjusting the amount of aggregate, the amount of aggregate is reduced according to the number of crack areas.

[0070] The reduction in the amount of aggregate used is positively correlated with the number of crack areas.

[0071] Specifically, the amount of aggregate is the amount of aggregate used in the preparation of concrete.

[0072] Specifically, in the detection of the crack distribution state, the wall panel specimen processing method is determined according to the crack distribution state, and the wall panel specimen processing method is to adjust the number of pressure-dividing steel plates or the wall spacing.

[0073] Specifically, the crack distribution state includes a first preset crack distribution state and a second preset crack distribution state. The first preset crack distribution state is that the number of central crack areas is greater than or equal to the number of edge crack areas, and the second preset crack distribution state is that the number of central crack areas is less than the number of edge crack areas. The edge crack area is a specimen sub-area where cracks exist and the specimen sub-area is located at the edge of the wallboard specimen, and the central crack area is a specimen sub-area where cracks exist and no side of the specimen sub-area overlaps with the edge of the wallboard specimen.

[0074] Specifically, the crack distribution state is in the first preset crack distribution state, and the number of pressure-dividing steel plates is increased and adjusted, and the increase in the number of pressure-dividing steel plates is positively correlated with the number of central crack regions;

[0075] The number of pressure-dividing steel plates is less than the maximum allowable number of pressure-dividing steel plates.

[0076] The maximum allowable number of pressure-dividing steel plates = 10.

[0077] Specifically, the crack distribution state is in the second preset crack distribution state, and the wall spacing is adjusted to increase the spacing between the walls, and the increase in the spacing between the walls is positively correlated with the number of edge crack areas.

[0078] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

[0079] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for processing prewet aggregate concrete, characterized in that: include: Conducting ultrasonic testing on a target sub-area of ​​a target concrete wall panel to determine a particle size qualified parameter state, and determining a wall panel treatment method according to the particle size qualified parameter state; The wallboard processing method is to adjust the crushing parameters or the screening time; In the adjustment of crushing parameters, the crushing frequency and crushing intensity are adjusted according to the difference in particle size uniformity; Under the fracturing detection conditions, the preset fracturing detection rules are used to perform fracturing detection on the wallboard specimen; For the crack image to be analyzed of the wallboard specimen after the fracturing test, the crack treatment mode is determined according to the number of crack areas; The crack treatment mode is to adjust the amount of aggregate, or to detect the crack distribution state; In the detection of crack distribution state, the wall panel specimen treatment method is determined according to the crack distribution state, and the wall panel specimen treatment method is to adjust the number of pressure-dividing steel plates or the wall spacing; Divide the target concrete wall panel into sub-areas to determine a number of target sub-areas, perform ultrasonic testing on each target sub-area and determine the particle size qualified parameter status, and determine the wall panel treatment method according to the particle size qualified parameter status; If the particle size qualified parameter state is in the first preset particle size qualified parameter state, adjusting the crushing parameters; If the particle size qualified parameter state is in the second preset particle size qualified parameter state, the screening time is adjusted; The first preset particle size qualified parameter state is that the particle size uniformity is less than the preset particle size uniformity and the particle size is qualified, and the second preset particle size qualified parameter state is that the particle size uniformity is greater than or equal to the preset particle size uniformity and the particle size is unqualified; In the adjustment of the crushing parameters, the particle size uniformity difference is calculated according to the particle size uniformity and the preset particle size uniformity, and the crushing frequency is increased and the crushing intensity is decreased according to the particle size uniformity difference; The increase in the crushing frequency is positively correlated with the difference in particle size uniformity; The reduction in the crushing force is positively correlated with the difference in particle size uniformity.

2. The method for processing prewet aggregate concrete according to claim 1, characterized in that: In adjusting the screening time, the number of sonic wave velocities within the range to be adjusted is counted, and the screening time is increased and adjusted. The increase in the screening time is positively correlated with the number of sonic wave velocities within the range to be adjusted.

3. The method for processing prewet aggregate concrete according to claim 2, characterized in that: Under the fracturing detection conditions, a preset fracturing detection rule is used to perform fracturing detection on the wallboard specimen, and a crack image to be analyzed of the wallboard specimen is obtained, the number of crack areas is detected, and a crack treatment mode is determined according to the number of crack areas; If the number of crack regions is within a first preset range of the number of crack regions, adjusting the amount of aggregate; If the number of crack regions is within a second preset range of the number of crack regions, detecting the crack distribution state; Wherein, the fracturing detection condition is that the particle size qualified parameter state is in a third preset particle size qualified parameter state.

4. The method for processing prewet aggregate concrete according to claim 3, characterized in that: In adjusting the amount of aggregate, the amount of aggregate is reduced according to the number of crack areas. The reduction in the amount of aggregate used is positively correlated with the number of crack areas.

5. The method for processing prewet aggregate concrete according to claim 4, characterized in that: In the detection of crack distribution status, the wall panel specimen processing method is determined according to the crack distribution status. The wall panel specimen processing method is to adjust the number of pressure-dividing steel plates or the wall spacing.

6. The method for processing prewet aggregate concrete according to claim 5, characterized in that: The crack distribution state is in the first preset crack distribution state, and the number of pressure-dividing steel plates is increased and adjusted, and the increase in the number of pressure-dividing steel plates is positively correlated with the number of central crack areas; The number of pressure-dividing steel plates is less than the maximum allowable number of pressure-dividing steel plates.

7. The method for processing prewet aggregate concrete according to claim 6, characterized in that: The crack distribution state is in the second preset crack distribution state, and the wall spacing is adjusted to increase the adjustment, and the increase in the wall spacing is positively correlated with the number of edge crack areas.

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