Preparation method, detection method and application of mixed fiber fly ash concrete

Abstract

The present invention belongs to the field of concrete preparation technology, specifically a method for preparing mixed fiber fly ash concrete, a detection method and an application thereof, comprising the following steps: S1: weighing cement, crushed stone, sand, fly ash, microfilament steel fiber, polypropylene fiber, an air entraining agent and a water reducer according to the weight of each raw material; S2: adding cement, crushed stone, sand, fly ash and water into a mixer and stirring at a speed of 300-500r / min and a stirring time of 10-15min; S3: adding microfilament steel fiber, polypropylene fiber, an air entraining agent and a water reducer into the mixer and continuing stirring at a speed of 500-800r / min and a stirring time of 15-20min. By adding microfilament steel fiber and polypropylene fiber into the concrete batching, after the concrete is poured and hardened, the high tensile strength of the fiber can be utilized to significantly improve the structural strength and toughness of the concrete, thereby preventing the concrete building from cracking easily in the event of an earthquake, thereby improving the seismic performance of the building.

Description

Technical Field

[0001] The invention belongs to the technical field of concrete preparation, and in particular relates to a preparation method, a detection method and an application of mixed fiber fly ash concrete. Background Art

[0002] Earthquake resistance of buildings is one of the most important and difficult problems currently facing civil engineering. Earthquakes can cause irreversible damage to concrete structures. In order to alleviate the losses caused by earthquake disasters, it is necessary to start from the building structure and concrete performance to improve the earthquake resistance of houses.

[0003] Regarding the existing related technologies, the inventors believe that the following defects often exist: although the existing concrete can have sufficient strength, it is difficult to strike a balance between strength and toughness. Concrete with high strength often has poor toughness. When an earthquake occurs, the concrete structure is difficult to resist deformation and cracks or even breakage will occur. Therefore, the seismic performance of current concrete buildings still needs to be improved.

[0004] To this end, the present invention provides a preparation method, a detection method and an application of mixed fiber fly ash concrete. Summary of the Invention

[0005] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0006] The technical solution adopted by the present invention to solve the technical problem is: a method for preparing a mixed fiber fly ash concrete according to the present invention, wherein the concrete is composed of the following raw materials in parts by weight:

[0007]

[0008]

[0009] The preparation method of the concrete comprises the following steps:

[0010] S1: Weigh cement, crushed stone, sand, fly ash, microfilament steel fiber, polypropylene fiber, air entraining agent and water reducing agent according to the weight of each raw material;

[0011] S2: Add cement, gravel, sand, fly ash and water into a mixer and mix at a speed of 300-500 r / min for 10-15 min;

[0012] S3: Add microfilament steel fiber, polypropylene fiber, air entraining agent and water reducing agent into the mixer and continue stirring at a speed of 500-800 r / min for 15-20 min. After stirring is completed, discharge the material to obtain mixed fiber fly ash concrete.

[0013] By adding microfilament steel fiber and polypropylene fiber to the concrete ingredients, after the concrete is poured and hardened, the high tensile strength of the microfilament steel fiber and polypropylene fiber can be utilized to greatly improve the structural strength and toughness of the concrete. As a result, in the event of an earthquake, the concrete building is less likely to crack, thereby improving the seismic performance of the building.

[0014] A method for detecting mixed fiber fly ash concrete, the method being used to detect the mixed fiber fly ash concrete, comprising the following steps:

[0015] S1: First, pour concrete on the formwork, and after hardening, form a concrete block. Then, lift the formwork to the surface of the simulation table of the testing equipment and fix it with bolts.

[0016] S2: The motor drives the cam to rotate, which cooperates with the spring in the sleeve to make the simulation platform move up and down continuously, simulating the earthquake scene;

[0017] S3: After vibrating for a period of time, turn off the motor and observe whether there are cracks on the surface of the concrete block and whether there is local concrete collapse.

[0018] Preferably, the detection equipment includes a base; a simulation platform is installed on the upper side of the base through a telescopic rod; the telescopic rod includes a sleeve and an outrigger; a spring is fixedly connected between the outrigger and the bottom of the sleeve; the upper side of the simulation platform is fixedly connected to a template by bolts; a concrete block is cast on the upper side of the template; a cam is rotatably connected to the upper side of the base through a bracket, and the cam is driven by a motor; a guide column is fixedly connected to the lower side of the simulation platform; a roller is rotatably connected to the lower end of the guide column, and the roller and the cam are in contact with each other; concrete is first poured on the template, and after hardening, a concrete block is formed, and then the template is hoisted to the surface of the simulation platform. , and fixed with bolts, and then the cam is driven by the motor to rotate, cooperating with the spring in the sleeve, so that the simulation table moves up and down continuously to simulate the earthquake scene, so as to detect the concrete block. The frequency of vibration can be adjusted by adjusting the speed of the motor. When the simulation table moves up and down, it drives the outrigger column to expand and contract inside the sleeve, playing a guiding role. After vibrating for a period of time, the motor is turned off to observe whether there are cracks on the surface of the concrete block and whether there is local concrete collapse, so as to judge whether the building constructed with this concrete meets the earthquake resistance requirements and whether the content of microfilament steel fiber and polypropylene fiber in the concrete needs to be increased or decreased.

[0019] Preferably, a positioning frame and a retaining frame are fixedly connected to the upper side of the simulation platform; an opening and closing plate is hinged on one side of the retaining frame through a hinge; by setting the positioning frame, the template is placed inside the positioning frame when lifting the template, which facilitates the alignment of the threaded holes between the template and the simulation platform, facilitates the insertion of bolts, and improves installation efficiency. If concrete collapses during the detection process, the retaining frame can block and collect the collapsed concrete debris to prevent the debris from scattering everywhere.

[0020] Preferably, the outrigger column and the sleeve are connected in a sliding seal; a group of nozzles are evenly distributed on the inner side of the baffle away from the closing plate; the nozzles and the bottom of the sleeve are connected to each other through a conduit; the nozzles are tilted downward at one end close to the opening and closing plate; when the simulation platform drives the outrigger column to move downward, the air inside the sleeve is squeezed by the outrigger column, and the air is squeezed into the interior of multiple nozzles through the conduit, and then the nozzles spray air toward the surface of the simulation platform, thereby continuously blowing the debris collected inside the baffle frame to the opening and closing plate, so that the debris can be concentrated at the opening and closing plate, and after the opening and closing plate is opened later, it is convenient to clean the debris in a concentrated manner.

[0021] Preferably, a rubber pad is fixedly connected between the positioning frame and the baffle frame, and the rubber pad is tilted downward on the side close to the opening and closing plate; a rotating shaft is rotatably connected inside the nozzle; one end of the rotating shaft is fixedly connected to the fan blade, and the other end extends to the outside of the nozzle and is evenly distributed on the circumference of a group of elastic bars; the end of the elastic bar away from the rotating shaft is fixedly connected to a ball; when air is ejected through the nozzle, it will synchronously push the fan blade to rotate, and then the rotating shaft drives multiple elastic bars to rotate. When the elastic bar rotates to the bottom, it can knock the rubber pad through the ball, causing the rubber pad to shake, accompanied by the blowing effect, so that the debris can quickly roll along the inclined surface of the rubber pad toward the opening and closing plate, further improving the efficiency of centralized processing of the debris.

[0022] Preferably, detection tubes are evenly distributed on the upper side of the template, and the detection tubes pass through the concrete block; the detection tubes are made of transparent material; a group of side grooves are evenly distributed on the surface of the detection tubes; if it is to be observed whether there are cracks inside the concrete block, the existing technology usually cuts the concrete block and then checks, but this operation is too cumbersome, and the cutting process may also cause cracks or collapses in the concrete, making it impossible to determine whether the cracks are caused by vibration or cutting. At this time, by setting up multiple detection tubes, on the one hand, the arrangement of the detection tubes is similar to steel bars, and concrete is usually used in conjunction with steel bars, thereby simulating the actual use of concrete. On the other hand, after the vibration is over, the motor is turned off, and the interior of multiple detection tubes is filled with water respectively, and then the water level in the detection tube is observed to see if it drops. If it drops, it indicates that cracks have occurred inside the concrete block at the detection tube, and the water in the detection tube has seeped into the cracks through the side grooves. This method is convenient for observing whether there are cracks inside the concrete block, and the corresponding position of the cracks can be known through the detection tube without cutting the concrete block for inspection.

[0023] Preferably, a support block is fixedly connected to the bottom of the detection tube; a group of floating rings are slidably connected to the inside of the detection tube, and the floating rings are aligned with the side grooves respectively; adjacent floating rings are fixedly connected to each other by connecting rods; a support plate is fixedly connected to the inside of a floating ring at the bottom, and the floating ring is placed on the surface of the support block through the support plate; the side grooves are blocked by arranging multiple floating rings to prevent concrete from entering the inside of the detection tube through the side grooves during pouring and causing blockage. Subsequently, during the vibration process, the floating rings also swing up and down inside the detection tube, thereby separating the floating rings from the concrete at the side grooves. When the vibration is over, water is injected into the inside of the detection tube, and the floating rings are affected by the buoyancy of the water and move upward, opening multiple side grooves synchronously. At this time, the water in the detection tube can penetrate into the cracks of the concrete through the side grooves.

[0024] Preferably, the support block is made of water-absorbing and expanding material; a group of through holes are evenly distributed on the surface of the support plate; after water is injected into the detection tube, the water flows down through the through holes on the surface of the support plate and contacts the support block, and then the support block absorbs water and expands, pressing the support plate upward, driving multiple floating rings to move upward at the same time, further separating the floating rings from the concrete at the side grooves, preventing the fixing force on the floating rings from being too large after the concrete dries, and causing the problem that the floating rings are not separated from the concrete during the vibration process, so that the floating rings can smoothly open the side grooves.

[0025] An application of hybrid fiber fly ash concrete, which uses the above-mentioned hybrid fiber fly ash concrete, and the hybrid fiber fly ash concrete is used to build buildings or bridges. Due to the high strength and high toughness of the concrete of the present invention, the seismic performance of buildings and bridges can be improved, especially for high-rise buildings and long-span bridges, the seismic effect is significant.

[0026] The beneficial effects of the present invention are as follows:

[0027] 1. The present invention discloses a method for preparing, testing, and applying a hybrid fiber fly ash concrete. By adding microfilament steel fibers and polypropylene fibers to the concrete mix, the high tensile strength of the microfilament steel fibers and polypropylene fibers can be utilized to significantly improve the structural strength and toughness of the concrete after the concrete is poured and hardened. This prevents concrete structures from cracking during earthquakes, thereby improving the seismic performance of the buildings.

[0028] 2. The present invention discloses a method for preparing, detecting, and applying mixed fiber fly ash concrete. A cam is driven by a motor to rotate, which cooperates with a spring in a sleeve to cause a simulation table to continuously move up and down, simulating an earthquake scenario, thereby detecting concrete blocks. The frequency of vibration can be adjusted by adjusting the speed of the motor. When the simulation table moves up and down, it drives the outrigger column to extend and retract inside the sleeve, playing a guiding role. After vibrating for a period of time, the motor is turned off to observe whether there are cracks on the surface of the concrete block and whether there is local concrete collapse, thereby judging whether the building constructed with the concrete meets the earthquake resistance requirements and whether the content of microfilament steel fiber and polypropylene fiber in the concrete needs to be increased or decreased. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention will be further described below with reference to the accompanying drawings.

[0030] Figure 1 It is a schematic flow chart of the preparation method of the present invention;

[0031] Figure 2 It is a schematic flow chart of the detection method of the present invention;

[0032] Figure 3 is a perspective view of the detection device of the present invention;

[0033] Figure 4 It is a three-dimensional diagram of the detection device of the present invention from another perspective;

[0034] Figure 5 yes Figure 3 A partial enlarged view of the middle part;

[0035] Figure 6 It is a three-dimensional diagram of the detection tube of the present invention;

[0036] Figure 7 It is a cross-sectional view of the detection tube in the present invention.

[0037] In the figure: base 1, simulation table 2, sleeve 3, outrigger 4, bolt 5, template 6, concrete block 7, cam 8, motor 9, guide column 10, roller 11, positioning frame 12, baffle frame 13, opening and closing plate 14, nozzle 15, guide tube 16, rubber pad 17, rotating shaft 18, fan blade 19, elastic bar 20, ball 21, detection tube 22, side groove 23, support block 24, floating ring 25, connecting rod 26, support plate 27. DETAILED DESCRIPTION

[0038] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0039] like Figure 1As shown, a method for preparing mixed fiber fly ash concrete is provided, wherein the concrete is composed of the following raw materials in parts by weight:

[0040]

[0041] The preparation method of the concrete comprises the following steps:

[0042] S1: Weigh cement, crushed stone, sand, fly ash, microfilament steel fiber, polypropylene fiber, air entraining agent and water reducing agent according to the weight of each raw material;

[0043] S2: Add cement, gravel, sand, fly ash and water into a mixer and mix at a speed of 300-500 r / min for 10-15 min;

[0044] S3: Add microfilament steel fiber, polypropylene fiber, air entraining agent and water reducing agent into the mixer and continue stirring at a speed of 500-800 r / min for 15-20 min. After stirring is completed, discharge the material to obtain mixed fiber fly ash concrete.

[0045] By adding microfilament steel fiber and polypropylene fiber to the concrete ingredients, after the concrete is poured and hardened, the high tensile strength of the microfilament steel fiber and polypropylene fiber can be utilized to greatly improve the structural strength and toughness of the concrete. As a result, in the event of an earthquake, the concrete building is less likely to crack, thereby improving the seismic performance of the building.

[0046] like Figure 2 As shown, a method for detecting mixed fiber fly ash concrete is provided, which is used to detect the mixed fiber fly ash concrete, comprising the following steps:

[0047] S1: First, pour concrete on the template 6, and after hardening, form a concrete block 7. Then, lift the template 6 to the surface of the simulation table 2 of the testing equipment and fix it with bolts 5;

[0048] S2: The motor 9 drives the cam 8 to rotate, which cooperates with the spring in the sleeve 3 to make the simulation platform 2 move up and down continuously, simulating an earthquake scene;

[0049] S3: After vibrating for a period of time, the motor 9 is turned off and the surface of the concrete block 7 is observed to see if there are cracks or local concrete collapse.

[0050] Example 1:

[0051] like Figures 3 to 6As shown, the detection equipment described in the embodiment of the present invention includes a base 1; a simulation platform 2 is installed on the upper side of the base 1 through a telescopic rod; the telescopic rod includes a sleeve 3 and an outrigger 4; a spring is fixedly connected between the outrigger 4 and the bottom of the sleeve 3; a template 6 is fixedly connected to the upper side of the simulation platform 2 through a bolt 5; a concrete block 7 is cast on the upper side of the template 6; a cam 8 is rotatably connected to the upper side of the base 1 through a bracket, and the cam 8 is driven by a motor 9; a guide column 10 is fixedly connected to the lower side of the simulation platform 2; a roller 11 is rotatably connected to the lower end of the guide column 10, and the roller 11 and the cam 8 are in contact with each other; concrete is first poured on the template 6, and after hardening, a concrete block 7 is formed, and then The template 6 is lifted to the surface of the simulation table 2 and fixed with bolts 5. The cam 8 is then driven to rotate by the motor 9, which cooperates with the spring in the sleeve 3 to make the simulation table 2 move up and down continuously to simulate the earthquake scene, thereby detecting the concrete block 7. The frequency of vibration can be adjusted by adjusting the speed of the motor 9. When the simulation table 2 moves up and down, it drives the outrigger column 4 to extend and retract inside the sleeve 3, playing a guiding role. After vibrating for a period of time, the motor 9 is turned off to observe whether there are cracks on the surface of the concrete block 7 and whether there is local concrete collapse, so as to judge whether the building constructed with the concrete meets the earthquake resistance requirements and whether it is necessary to increase or decrease the content of microfilament steel fiber and polypropylene fiber in the concrete.

[0052] A positioning frame 12 and a retaining frame 13 are fixedly connected to the upper side of the simulation platform 2; an opening and closing plate 14 is hinged on one side of the retaining frame 13 through a hinge; by setting the positioning frame 12, the template 6 is placed inside the positioning frame 12 when lifting the template 6, which facilitates the alignment of the threaded holes between the template 6 and the simulation platform 2, facilitates the insertion of the bolts 5, and improves the installation efficiency. If concrete collapses during the detection process, the retaining frame 13 can block and collect the collapsed concrete debris to prevent the debris from scattering everywhere.

[0053] The outrigger 4 and the sleeve 3 are connected in a sliding and sealed manner; a group of nozzles 15 are evenly distributed on the inner side of the baffle 13 away from the closing plate 14; the nozzles 15 and the bottom of the sleeve 3 are connected to each other through a conduit 16; the end of the nozzle 15 close to the opening and closing plate 14 is inclined downward; when the simulation platform 2 drives the outrigger 4 to move downward, the air inside the sleeve 3 is squeezed by the outrigger 4, and the air is squeezed into the multiple nozzles 15 through the conduit 16, and then the nozzles 15 spray toward the surface of the simulation platform 2, thereby continuously blowing the debris collected inside the baffle 13 to the opening and closing plate 14, so that the debris can be concentrated at the opening and closing plate 14. After the opening and closing plate 14 is opened later, the debris can be easily cleaned up.

[0054] A rubber pad 17 is fixedly connected between the positioning frame 12 and the baffle frame 13, and the rubber pad 17 is inclined downward on the side close to the opening and closing plate 14; a rotating shaft 18 is rotatably connected inside the nozzle 15; one end of the rotating shaft 18 is fixedly connected to the fan blade 19, and the other end extends to the outside of the nozzle 15 and is evenly distributed on a group of elastic bars 20; the end of the elastic bar 20 away from the rotating shaft 18 is fixedly connected to the ball 21; when air is ejected through the nozzle 15, it will synchronously push the fan blade 19 to rotate, and then the rotating shaft 18 drives multiple elastic bars 20 to rotate. When the elastic bar 20 rotates to the bottom, it can knock the rubber pad 17 through the ball 21, causing the rubber pad 17 to vibrate, accompanied by the blowing effect, so that the debris can quickly roll along the inclined surface of the rubber pad 17 toward the opening and closing plate 14, further improving the efficiency of centralized processing of the debris.

[0055] Detection tubes 22 are evenly distributed on the upper side of the template 6 and penetrate the concrete block 7; the detection tubes 22 are made of transparent material; and a group of side grooves 23 are evenly distributed on the surface of the detection tubes 22. To observe whether there are cracks inside the concrete block 7, the existing technology usually cuts the concrete block 7 for inspection, but this operation is too cumbersome, and the cutting process may also cause cracks or collapse in the concrete, making it impossible to determine whether the cracks are caused by vibration or cutting. In this case, by providing multiple detection tubes 22, on the one hand, the arrangement of the detection tubes 22 is similar to steel bars. Concrete is usually used in conjunction with steel bars, thereby simulating the actual use of concrete. On the other hand, after the vibration is over, the motor 9 is turned off, and the interiors of the multiple detection tubes 22 are filled with water respectively, and then the water level in the detection tubes 22 is observed to seep. If it drops, it indicates that cracks have occurred in the concrete block 7 at the detection tube 22. The water in the detection tube 22 has seeped into the cracks through the side grooves 23. This method makes it easy to observe whether there are cracks inside the concrete block 7 and can know the corresponding position of the cracks through the detection tubes 22 without having to cut the concrete block 7 for inspection.

[0056] Example 2:

[0057] like Figure 7As shown, compared with Example 1, another embodiment of the present invention is as follows: a support block 24 is fixedly connected to the bottom of the detection tube 22; a group of floating rings 25 are slidably connected to the inside of the detection tube 22, and the floating rings 25 are aligned with the side grooves 23 respectively; adjacent floating rings 25 are fixedly connected to each other by connecting rods 26; a support plate 27 is fixedly connected to the inside of a floating ring 25 at the bottom, and the floating ring 25 is placed on the surface of the support block 24 through the support plate 27; the side grooves 23 are blocked by arranging multiple floating rings 25 to prevent concrete from entering the detection tube 22 through the side grooves 23 during pouring and causing blockage. Subsequently, during the vibration process, the floating rings 25 also swing up and down inside the detection tube 22, thereby separating the floating rings 25 from the concrete at the side grooves 23. When the vibration ends, water is injected into the detection tube 22, and the floating rings 25 are affected by the buoyancy of the water and move upward, opening multiple side grooves 23 synchronously. At this time, the water in the detection tube 22 can penetrate into the cracks of the concrete through the side grooves 23.

[0058] The support block 24 is made of a water-swelling material; a group of through holes are evenly distributed on the surface of the support plate 27; after water is injected into the detection tube 22, the water flows down through the through holes on the surface of the support plate 27 and contacts the support block 24, and then the support block 24 absorbs water and expands, pressing the support plate 27 upward, driving the multiple floating rings 25 to move upward at the same time, further separating the floating rings 25 from the concrete in the side grooves 23, preventing the fixing force of the floating rings 25 from being too large after the concrete dries, which may cause the floating rings 25 to fail to separate from the concrete during the vibration process, thereby allowing the floating rings 25 to smoothly open the side grooves 23.

[0059] An application of hybrid fiber fly ash concrete, which uses the above-mentioned hybrid fiber fly ash concrete, and the hybrid fiber fly ash concrete is used to build buildings or bridges. Due to the high strength and high toughness of the concrete of the present invention, the seismic performance of buildings and bridges can be improved, especially for high-rise buildings and long-span bridges, the seismic effect is significant.

[0060] Working principle: First, pour concrete on the template 6, and form a concrete block 7 after hardening. Then, the template 6 is lifted to the surface of the simulation platform 2 and fixed with bolts 5. Then, the cam 8 is driven by the motor 9 to rotate, and cooperates with the spring in the sleeve 3 to make the simulation platform 2 move up and down continuously to simulate the earthquake scene, so as to detect the concrete block 7. The frequency of vibration can be adjusted by adjusting the speed of the motor 9. When the simulation platform 2 moves up and down, it drives the outrigger 4 to expand and contract inside the sleeve 3, playing a guiding role. After vibrating for a period of time, turn off the motor 9 and observe whether there are cracks on the surface of the concrete block 7, and whether there is local concrete collapse, so as to judge whether the building constructed with the concrete meets the earthquake resistance requirements and whether it needs Increase or decrease the content of microfilament steel fiber and polypropylene fiber in concrete; by setting a positioning frame 12, the template 6 is placed inside the positioning frame 12 when lifting the template 6, which facilitates the alignment of the threaded holes between the template 6 and the simulation platform 2, facilitates the insertion of the bolts 5, and improves the installation efficiency. If concrete collapses during the detection process, the retaining frame 13 can block and collect the collapsed concrete debris to prevent the debris from scattering everywhere; when the simulation platform 2 drives the outrigger 4 to move downward, the air inside the sleeve 3 is squeezed by the outrigger 4, and the air is squeezed into the interior of multiple nozzles 15 through the conduit 16, and then the nozzles 15 spray toward the surface of the simulation platform 2, thereby continuously blowing the debris collected inside the retaining frame 13 to the opening and closing plate 14, so that the debris When the air is ejected from the nozzle 15, the fan blades 19 are synchronously driven to rotate, and then the shaft 18 drives the multiple spring bars 20 to rotate. When the spring bars 20 rotate downward, the balls 21 can strike the rubber pads 17, causing the rubber pads 17 to vibrate. Accompanied by the blowing effect, the debris can quickly roll toward the opening and closing plate 14 along the inclined surface of the rubber pads 17, further improving the efficiency of centralized processing of the debris. If it is to be observed whether there are cracks inside the concrete block 7, the prior art usually cuts the concrete block 7 open for inspection, but this operation is too cumbersome, and the cutting process may also cause cracks or collapses in the concrete. However, it is impossible to determine whether the cracks are caused by vibration or cutting. In this case, multiple detection tubes 22 are set. On the one hand, the arrangement of the detection tubes 22 is similar to that of steel bars. Concrete is usually used in conjunction with steel bars, thereby simulating the actual use of concrete. On the other hand, after the vibration is over, the motor 9 is turned off, and the interiors of the multiple detection tubes 22 are filled with water respectively. Then, it is observed whether the water level in the detection tubes 22 drops. If it drops, it indicates that cracks have occurred in the concrete block 7 at the detection tube 22. The water in the detection tube 22 has seeped into the cracks through the side grooves 23. This method makes it easy to observe whether there are cracks in the concrete block 7, and the corresponding positions of the cracks can be known through the detection tubes 22 without having to cut the concrete block 7 for inspection.By providing multiple floating rings 25 to seal the side grooves 23, concrete is prevented from entering the detection tube 22 through the side grooves 23 during pouring and causing blockage. Subsequently, during the vibration process, the floating rings 25 also oscillate up and down inside the detection tube 22, thereby separating the floating rings 25 from the concrete in the side grooves 23. When the vibration ends, water is injected into the detection tube 22. The floating rings 25 are affected by the buoyancy of the water and move upward, simultaneously opening the multiple side grooves 23. At this time, the water in the detection tube 22 can penetrate into the cracks in the concrete through the side grooves 23. After water is injected into the detection tube 22, the water flows down through the through holes on the surface of the support plate 27 and contacts the support block 24. The support block 24 then absorbs water and expands, pressing upward against the support plate 27, driving the multiple floating rings 25 to move upward simultaneously, further separating the floating rings 25 from the concrete in the side grooves 23. This prevents excessive fixing force on the floating rings 25 after the concrete dries, which could result in the floating rings 25 not being separated from the concrete during the vibration process. This allows the floating rings 25 to successfully open the side grooves 23.

[0061] The above-mentioned front, back, left, right, up and down are all based on the Figure 1 As a benchmark, according to the person's observation perspective, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0062] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention.

[0063] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for detecting mixed fiber fly ash concrete, characterized by: The following steps are involved: S1: First, pour concrete on the template (6), and after hardening, form a concrete block (7), then lift the template (6) to the surface of the simulation table (2) of the testing equipment and fix it with bolts (5); The concrete is composed of the following raw materials in parts by weight: 200-230 parts cement 450-520 pieces of crushed stone 300-360 parts of sand 85-100 parts fly ash 40-50 parts of microfilament steel fiber 15-20 parts polypropylene fiber 4-6 parts of air entraining agent 4-6 parts of water reducer 80-120 parts water; The preparation method of the concrete comprises the following steps: A1: Weigh cement, crushed stone, sand, fly ash, microfilament steel fiber, polypropylene fiber, air entraining agent, and water reducing agent according to the weight of each raw material; A2: Add cement, gravel, sand, fly ash and water into a mixer and mix at a speed of 300-500 r / min for 10-15 minutes; A3: Add microfilament steel fiber, polypropylene fiber, air entraining agent and water reducer into a mixer and continue stirring at a speed of 500-800 r / min for 15-20 min. After stirring is completed, discharge the material to obtain mixed fiber fly ash concrete; S2: The cam (8) is driven to rotate by the motor (9), and cooperates with the spring in the sleeve (3), so that the simulation platform (2) moves up and down continuously, simulating an earthquake scene; S3: After vibrating for a period of time, the motor (9) is turned off and the surface of the concrete block (7) is observed to see if there are cracks or if there is local concrete collapse; The detection device comprises a base (1); a simulation platform (2) is mounted on the upper side of the base (1) via a telescopic rod; the telescopic rod comprises a sleeve (3) and an extension column (4); a spring is fixedly connected between the extension column (4) and the bottom of the sleeve (3); a template (6) is fixedly connected to the upper side of the simulation platform (2) via a bolt (5); a concrete block (7) is cast on the upper side of the template (6); a cam (8) is rotatably connected to the upper side of the base (1) via a bracket, and the cam (8) is driven by a motor (9); a guide column (10) is fixedly connected to the lower side of the simulation platform (2); a roller (11) is rotatably connected to the lower end of the guide column (10), and the roller (11) and the cam (8) are in contact with each other; Detection tubes (22) are evenly distributed on the upper side of the template (6), and the detection tubes (22) penetrate the concrete block (7); the detection tubes (22) are made of transparent material; and a group of side grooves (23) are evenly distributed on the surface of the detection tubes (22); The bottom of the detection tube (22) is fixedly connected to a support block (24); a group of floating rings (25) are slidably connected inside the detection tube (22), and the floating rings (25) are aligned with the side grooves (23) respectively; adjacent floating rings (25) are fixedly connected to each other through connecting rods (26); a support plate (27) is fixedly connected inside one of the floating rings (25) at the bottom, and the floating ring (25) is placed on the surface of the support block (24) through the support plate (27); The support block (24) is made of a water-swellable material; and a group of through holes are evenly distributed on the surface of the support plate (27).

2. A method for detecting hybrid fiber fly ash concrete according to claim 1, characterized in that: A positioning frame (12) and a stop frame (13) are fixedly connected to the upper side of the simulation platform (2); an opening and closing plate (14) is hingedly connected to one side of the stop frame (13) via a hinge.

3. A method for detecting hybrid fiber fly ash concrete according to claim 2, characterized in that: The extension column (4) and the sleeve (3) are connected in a sliding seal; a group of nozzles (15) are evenly distributed on the inner side of the retaining frame (13) away from the opening and closing plate (14); the nozzles (15) and the bottom of the sleeve (3) are connected to each other through a conduit (16); and one end of the nozzle (15) close to the opening and closing plate (14) is tilted downward.

4. A method for detecting hybrid fiber fly ash concrete according to claim 3, characterized in that: A rubber pad (17) is fixedly connected between the positioning frame (12) and the stop frame (13), and the side of the rubber pad (17) close to the opening and closing plate (14) is tilted downward; a rotating shaft (18) is rotatably connected inside the nozzle (15); one end of the rotating shaft (18) is fixedly connected to a fan blade (19), and the other end extends to the outside of the nozzle (15) and is evenly distributed around a group of elastic bars (20); the end of the elastic bar (20) away from the rotating shaft (18) is fixedly connected to a ball (21).

Images