CN115646992A - High-strength high-performance machine-made sand concrete and production process thereof - Google Patents

Abstract

The invention belongs to the technical field of concrete, in particular to high-strength high-performance machine-made sand concrete and a production process thereof; comprises a base, a hopper, a chain plate conveyor belt, an extrusion roller, a motor, a gear, a belt pulley and a belt; the two squeezing rollers are driven by the motor to rotate relatively, so that concrete waste in the hopper is squeezed downwards, the concrete waste is crushed, the crushed concrete waste falls to the top of the chain plate conveyor belt below, crushed wood in the concrete waste is in clear water in the cleaning tank, and the crushed wood floats to the surface of the clear water; meanwhile, the gear rotates to drive the belt pulley to rotate, the chain plate transmission belt is driven to rotate through belt transmission, the concrete waste is transmitted to the collecting tank, soil mixed in the concrete waste is cleaned by clear water, redundant broken wood and soil are removed, and the purity degree of the concrete waste is improved; not only improves the quality of the machine-made sand, but also reduces the probability that the soil is adhered to the inner wall of the crusher and the surface of the jaw plate.

Description

A kind of high-strength and high-performance machine-made sand concrete and its production process

technical field

The invention belongs to the technical field of concrete, in particular to a high-strength and high-performance machine-made sand concrete and a production process thereof.

Background technique

Concrete is the most important material in contemporary architecture. It is mainly composed of cementitious materials, water, admixtures and additives in proportion to uniform mixing; concrete has the characteristics of high compressive strength, good durability, and a wide range of strength grades; With more and more engineering construction, there is more and more demand for concrete; the main component of concrete is sand and gravel aggregate.

The existing sand and gravel aggregates are mainly divided into natural sand and artificial sand; natural sand is obtained by crushing and screening natural stones such as pebbles and crushed stones; It is prepared through crushing, shaping, screening and other processes; with the increasing protection of the natural environment and the demand for the treatment of industrial waste and demolished concrete, machine-made sand has gradually become the main source of sand and gravel aggregate.

Manufactured sand is prepared from demolished concrete. The demolished concrete waste contains a large amount of wood and soil, and it is directly prepared into machine-made sand, which not only reduces the hardness of the machine-made sand, but also affects the quality of the prepared concrete; When the waste is crushed, more soil will adhere to the inner wall of the pulverizer and the surface of the jaw plate, which will affect the crushing effect of the concrete waste.

Therefore, the invention provides a high-strength and high-performance machine-made sand concrete and a production process thereof.

Contents of the invention

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

The technical scheme adopted by the present invention to solve the technical problem is: a kind of high-strength and high-performance machine-made sand concrete production process of the present invention, the production process comprises the following steps:

A1: Put the recovered concrete waste into the pretreatment device for pretreatment process, remove the mixed wood and soil in the concrete waste, and obtain pure concrete waste; the pretreated concrete waste removes the excess debris wood and soil, which improves the purity of concrete waste; not only improves the quality of machine-made sand, but also reduces the probability of soil adhering to the inner wall of the crusher and the surface of the jaw plate;

A2: After the pure concrete waste is mechanically crushed, shaped, screened and washed with water, the apparent density is 2715kg/m ³ , the fineness modulus is 2.5, the particle gradation belongs to zone II, and the stone powder content is 3.9%. , manufactured sand with MB value of 0.8;

A3: Put cement, gravel, machine-made sand, stone powder, fly ash, mineral powder and water into the mixing tank for stirring and mixing, and add water reducing agent and mud-repelling agent; make machine-made sand concrete.

Preferably, the pretreatment process of the pretreatment device comprises the following steps:

B1: Put the recycled concrete waste into the hopper, and the motor drives two extrusion rollers to crush the concrete waste in the hopper;

B2: The broken concrete waste falls to the top surface of the plate chain conveyor belt, and the clear water in the cleaning tank washes away the soil in the concrete waste, and at the same time, makes the mixed broken wood float to the water surface;

B3: The motor drives the plate chain conveyor belt through the transmission of the pulley and the belt, and drives the concrete waste falling on the top surface of the plate chain conveyor belt to the collection tank;

B4: The concrete waste from removing soil and broken wood falls into the lifting net cage in the collection tank. After the lifting net cage is full, use a crane to lift out the lifting net cage to obtain pure concrete waste .

Preferably, the pretreatment device includes a base, a hopper, a chain conveyor belt, a squeeze roller, a motor, a gear, a pulley, a belt, and a lifting cage; the top surface of the base is provided with a cleaning tank, and the cleaning tank A collecting tank is provided at one end, and a hopper is fixedly connected to the top surface of the cleaning tank far away from the collecting tank. Squeezing rollers are installed on both sides of the inside of the hopper, and a motor is fixedly connected to one side of the outer wall of the hopper. The rotating shaft of the motor is fixedly connected to one end of an extrusion roller, and a pair of gears are installed on the outer wall of the hopper to rotate on the side away from the motor. The end of the roller is fixed, and the inside of the cleaning tank is rotated with a chain conveyor belt, and a plurality of through holes are evenly opened on the chain conveyor belt, and one end of the drive roller of the chain conveyor belt is fixed to the middle of a gear. There are belt pulleys connected, the outer rings of the two pulleys are provided with belts, and the inside of the collection tank is slidably installed with a lifting cage; when working, the recovered concrete waste is put into the inside of the hopper, and the motor drives one side of the extrusion The pressure roller rotates and drives the gear transmission. After the two gears are meshed and driven, the two extrusion rollers rotate relative to each other, and the concrete waste inside the hopper is squeezed downward, so that the concrete waste is broken, and the crushed concrete waste falls to the ground. To the top of the chain conveyor belt below, the broken wood in the concrete waste is in the clean water in the cleaning tank, and the broken wood floats to the surface of the clean water; at the same time, the gear rotates to drive the pulley to rotate, and through the belt drive, the chain drive belt is driven to rotate , to drive the concrete waste to the collection tank, and at the same time, the falling concrete waste is dispersed on the top surface of the chain conveyor belt, and the soil mixed in the concrete waste is cleaned by clean water; the concrete waste from which the soil and wood chips are removed falls to the collection Inside the hoisting cage in the tank, after the hoisting cage is full, use a crane to lift out the hoisting cage to obtain pure concrete waste; the pretreated concrete waste removes excess Crushed wood and soil improve the purity of concrete waste; not only improve the quality of machine-made sand, but also reduce the probability of soil adhering to the inner wall of the pulverizer and the surface of the jaw plate.

Preferably, both sides of the inside of the hopper are fixedly connected with a slide table, the slide table is located on the top of the extrusion roller, and the bottom surface of the slide table and the side wall of the hopper are fixedly connected with a plurality of counter inserts. block; when working, when the recycled concrete waste is put into the hopper, the concrete waste is blocked and guided by the sliding table, so that the concrete waste falls from the middle of the extrusion rollers on both sides, and the concrete waste is carried by the extrusion roller The impact counter-attack insert improves the degree of crushing of concrete waste, thereby improving the effect of separating wood chips.

Preferably, the bottom of the cleaning tank is fixedly connected with an ash accumulation pallet, the bottom surface of the ash accumulation pallet is slidably matched with the inner ring of the chain conveyor belt, and the top surface of the ash accumulation pallet is fixed with a deep groove plate , the two ends of the deep groove plate are fixedly connected to both sides of the cleaning tank respectively, the top surface of the deep groove plate is bolted with a dust cover, and the tops of both sides of the deep groove plate are uniformly provided with a plurality of notches A water pump is fixedly connected to one side of the base, and the water inlet pipe of the water pump is connected to the inside of the deep groove plate, and a U-shaped water pipe is fixedly connected to the outer ring of the top surface of the cleaning tank, and the water outlet pipe of the water pump The U-shaped water pipe is connected, and the inner side of the U-shaped water pipe is evenly connected with a plurality of high-pressure nozzles, and the blowing end of the high-pressure nozzle is inclined to the cleaning tank; when working, the soil mixed in the concrete waste passes through the through hole of the chain plate drive belt Falling to the top surface of the dust-accumulating pallet, the falling soil is blocked by the dust cover, so that the clean water inside the deep groove plate is kept clean. The high-pressure nozzle sprays obliquely into the cleaning tank, and the high-pressure water jetted out washes the concrete waste on the top of the chain plate conveyor belt, thereby further improving the soil cleaning effect on the surface of the concrete waste; the dust accumulation pallet is wrapped by the chain plate conveyor belt to form The relatively static annular area reduces the velocity of the water flow and improves the effect of soil sedimentation.

Preferably, the interior of the deep groove plate is evenly fixed with a plurality of partition plates, the plurality of partition plates and the notches are alternately distributed, the middle parts of the plurality of partition plates are fixed with connecting pipes, and the plurality of partition plates are fixed with connecting pipes. The outer wall of the connecting pipe is evenly provided with multiple groups of water holes, each group of water holes corresponds to the notch, and each group of water holes is evenly opened around the connecting pipe, and the inside of the connecting pipe is connected to the water inlet end of the water pump through a pipeline; working At the same time, the clear water in the inner ring of the chain plate drive belt enters the inside of the deep groove plate through the notch, and is separated by multiple partition plates, which reduces the flow rate of the water flow and reduces the probability of soil passing through the inside of the deep groove plate.

Preferably, a plurality of crossbars are fixed inside the cleaning tank, and the crossbars are located above the chain conveyor belt, and a plurality of inclined plates are uniformly fixed on the top of the crossbars, adjacent to the top of the crossbars. The inclined direction of the inclined plate on the surface is opposite; when working, the chain plate drive belt drives the concrete waste to the collection tank, and when the concrete waste passes the cross bar, it is blocked by the inclined plate and turned over, so as to complete the turning over of the concrete waste. Cooperate with the high-pressure water flow sprayed by the high-pressure nozzle to clean the concrete waste, and then improve the comprehensiveness of the concrete waste cleaning.

Preferably, a beam is fixed on the top between the cleaning tank and the collecting tank, and a plurality of rubber sheets are evenly bolted to the side of the beam close to the cleaning tank, and a reinforcing elastic piece is fixed on the outer wall of the rubber sheet, so that The bottom of the reinforced shrapnel is a plurality of elastic strips; when working, when the concrete waste falls into the collection tank, the rubber sheet and the reinforced shrapnel are bent toward the collection tank, so that the concrete waste falls into the inside of the lifting cage, and at the same time, the rubber The chips prevent the wood chips floating in the cleaning tank from entering the collection tank.

Preferably, the chain plate conveyor belt is formed by hinged end to end of a plurality of chain plates, a plurality of through holes are evenly opened on the top surface of the chain plate, and a mounting groove is opened at one end of the chain plate, and the inside of the mounting groove A sliding plate is installed on the sliding plate, and a plurality of connecting holes are evenly opened on the sliding plate. The connecting holes correspond to the through holes one by one. A rotating rod is installed in a corner of the installation groove, and the rotating rod runs through the chain. The top wall of the plate, the outer ring of the rotating rod is fixedly connected with a gear ring, the side of the slide plate close to the rotating rod is fixedly connected with a spur rack, the gear ring meshes with the straight rack, and the opening of the installation groove There is a cover plate bolted to the top of the chain plate, and the top surface of the chain plate is evenly fixed with a cone block; when working, turn the rotating rod to drive the ring gear to rotate, drive the straight rack meshed with it to move, and drive the slide plate inside the installation groove Sliding makes the connection hole on the slide plate misaligned with the through hole on the chain plate, thereby controlling the size of the through hole of the chain plate conveyor belt, and then controlling the efficiency of soil passing through the chain plate conveyor belt.

A high-strength and high-performance machine-made sand concrete, which is prepared by the above-mentioned production process of high-strength and high-performance machine-made sand concrete, and the machine-made sand concrete is composed of the following raw materials in parts by weight:

Cement 178-235

Gravel 800-1000

Machine-made sand 700-800

Stone powder 100-150

Fly Ash 15-59

Mineral powder 0-59

Water reducer 2-2.5

Anti-silt agent 2-2.5

water 150-200;

In the present invention, the cement is Portland cement, the 3d and 28d compressive strengths are respectively 26.1 and 43.7MPa, and the 3d and 28d flexural strengths are respectively 5.2 and 7.9MPa; crushed stones, wherein 5-15mm crushed stones account for 40%, 15 ~25 mm crushed stone accounts for 60%, the aggregate type is Class II, and the apparent density is 2695 kg/m ³ ; the fly ash is Class II, the SiO ₂ content is 53.5%, the specific surface area is 380m ² /kg, and the water content is 0.32% , the activity index is 67.9%; the water reducing agent is polycarboxylate water reducing agent, and the water reducing rate is 30%.

The beneficial effects of the present invention are as follows:

1. A kind of high-strength and high-performance machine-made sand concrete and its production process described in the present invention, by arranging hopper, chain conveyor belt, extrusion roller, motor, gear, belt pulley and belt; The concrete waste that reclaims is put into the inside of hopper , the motor drives the two extrusion rollers to rotate relative to each other to squeeze the concrete waste inside the hopper downward, so that the concrete waste is broken, and the broken concrete waste falls to the top of the chain conveyor belt below, and the concrete waste The broken wood is in the clear water in the cleaning tank, and the broken wood floats to the surface of the clear water; at the same time, the gear rotates to drive the pulley to rotate, and through the belt drive, the chain plate belt is driven to rotate, and the concrete waste is transmitted to the collection tank, and at the same time makes the falling waste Concrete waste is scattered on the top surface of the chain conveyor belt, and the soil mixed in the concrete waste is cleaned by clean water; the pretreated concrete waste removes excess wood and soil, and improves the purity of the concrete waste; It not only improves the quality of machine-made sand, but also reduces the probability of soil adhering to the inner wall of the pulverizer and the surface of the jaw plate.

2. A kind of high-strength and high-performance machine-made sand concrete of the present invention and its production process, through the increase of mineral powder content, the slump of machine-made sand concrete, expansion degree increase gradually, and the fluidity of concrete decreases first and then increases large, the fluidity is improved, the cohesion of the mixture is better, and the compressive strength first increases and then decreases. When the amount of mineral powder is 10%, the compressive strength of machine-made sand concrete is the highest; the increase in the amount of fly ash leads to The fluidity of machine-made sand concrete is increasing; the addition of fly ash and mineral powder is conducive to improving the fluidity of machine-made sand concrete; increasing the amount of mineral powder is conducive to improving the early compressive strength and flexural strength of machine-made sand concrete ; Increasing the amount of fly ash reduces the early strength of machine-made sand concrete; with the increasing amount of slag powder, the fluidity of concrete presents a trend of decreasing first and then increasing.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing.

Fig. 1 is the perspective view of pretreatment device among the present invention;

Fig. 2 is the sectional view of pretreatment device among the present invention;

Fig. 3 is the exploded view of pretreatment device among the present invention;

Fig. 4 is the sectional view of hopper among the present invention;

Fig. 5 is the sectional view of deep groove plate in the present invention;

Fig. 6 is the exploded view of deep groove plate in the present invention;

Fig. 7 is the structural diagram of cross bar and inclined plate among the present invention;

Fig. 8 is the structural diagram of rubber sheet and reinforcing elastic sheet among the present invention;

Fig. 9 is a perspective view of the chain plate in the present invention;

Fig. 10 is the exploded view of chain plate among the present invention;

Fig. 11 is a production process flow chart of the present invention;

Fig. 12 is a pretreatment process flow chart of the present invention;

In the figure: 1. Base; 2. Hopper; 3. Chain conveyor belt; 4. Squeeze roller; 5. Motor; 6. Gear; 7. Pulley; 8. Belt; 9. Lifting cage; 10. Sliding material Taiwan; 11. Counter-attack insert; 12. Ash pallet; 13. Deep groove plate; 14. Dust cover; 15. Notch; 16. Water pump; 17. U-shaped water pipe; 18. High pressure nozzle; 19. Point Partition plate; 20, connecting pipe; 21, water hole; 22, cross bar; 23, inclined plate; 24, cross beam; 25, rubber sheet; 26, reinforced shrapnel; 27, chain plate; 28, installation groove; 29, slide plate ; 30, rotating rod; 31, ring gear; 32, straight rack; 33, cover plate; 34, cone block.

Detailed ways

In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further elaborated.

As shown in Figure 11, a production process of high-strength and high-performance machine-made sand concrete, the production process includes the following steps:

A1: Put the recovered concrete waste into the pretreatment device for pretreatment process, remove the mixed wood and soil in the concrete waste, and obtain pure concrete waste; the pretreated concrete waste removes the excess debris wood and soil, which improves the purity of concrete waste; not only improves the quality of machine-made sand, but also reduces the probability of soil adhering to the inner wall of the crusher and the surface of the jaw plate;

A2: After the pure concrete waste is mechanically crushed, shaped, screened and washed with water, the apparent density is 2715kg/m ³ , the fineness modulus is 2.5, the particle gradation belongs to zone II, and the stone powder content is 3.9%. , manufactured sand with MB value of 0.8;

A3: Put cement, gravel, machine-made sand, stone powder, fly ash, mineral powder and water into the mixing tank for stirring and mixing, and add water reducing agent and mud-repelling agent; make machine-made sand concrete.

As shown in Figure 12, the pretreatment process of described pretreatment device comprises the following steps:

B1: Put the recycled concrete waste into the hopper 2, and the motor 5 drives two squeeze rollers 4 to crush the concrete waste in the hopper 2;

B2: The broken concrete waste falls to the top surface of the plate chain conveyor belt 3, and the clear water in the cleaning tank washes away the soil in the concrete waste, and at the same time, makes the mixed broken wood float to the water surface;

B3: The motor 5 drives the plate chain conveyor belt 3 through the transmission of the pulley 7 and the belt 8, and drives the concrete waste falling on the top surface of the plate chain conveyor belt 3 to the collection tank;

B4: The concrete waste from removing soil and broken wood falls into the inside of the hoisting cage 9 in the collection tank. After the hoisting cage 9 is full, the hoisting cage 9 is hoisted out by a crane to obtain pure concrete waste.

As shown in Figures 1 to 3, the pretreatment device includes a base 1, a hopper 2, a chain conveyor belt 3, a squeeze roller 4, a motor 5, a gear 6, a pulley 7, a belt 8 and a lifting cage 9; The top surface of the base 1 is provided with a cleaning tank, and one end of the cleaning tank is provided with a collection tank, and the top surface of the cleaning tank away from the collection tank is fixedly connected with a hopper 2, and both sides of the hopper 2 are installed in rotation There is a squeeze roller 4, a motor 5 is fixedly connected to one side of the outer wall of the hopper 2, the rotating shaft of the motor 5 is fixedly connected to one end of a squeeze roller 4, and the outer wall of the hopper 2 rotates away from the side of the motor 5 A pair of gears 6 are installed, and the two gears 6 are meshed, and the two gears 6 are fixedly connected to the ends of the two squeeze rollers 4 respectively, and a chain plate conveyor belt 3 is installed in the rotation of the cleaning tank. A plurality of through holes are evenly opened on the chain plate conveyor belt 3, and a pulley 7 is fixedly connected to one end of the drive roller of the chain plate conveyor belt 3 and the middle part of a gear 6, and the outer rings of the two pulleys 7 are provided with belts. 8. The inside of the collection tank is slidingly installed with a lifting cage 9; when working, the recycled concrete waste is put into the inside of the hopper 2, and the motor 5 drives the extrusion roller 4 on one side to rotate, and drives the gear 6 to drive. The two gears 6 are meshed and driven, so that the two extrusion rollers 4 rotate relatively, and the concrete waste inside the hopper 2 is squeezed downward, so that the concrete waste is broken, and the broken concrete waste falls to the chain conveyor belt below 3, the broken wood in the concrete waste is in the clear water in the cleaning tank, and the broken wood floats to the surface of the clear water; at the same time, the gear 6 rotates, driving the pulley 7 to rotate, and through the transmission of the belt 8, it drives the chain plate drive belt 3 to rotate. Concrete waste is driven to the collection tank, and the falling concrete waste is scattered on the top surface of the chain conveyor belt 3, and the soil mixed in the concrete waste is cleaned by clean water; the concrete waste from which the soil and wood chips have been removed falls to the collection Inside the hoisting cage 9 in the tank, after the hoisting cage 9 is full, the hoisting cage 9 is lifted out by a crane to obtain pure concrete waste; the pretreated concrete waste is removed It reduces the excess wood and soil and improves the purity of concrete waste; it not only improves the quality of machine-made sand, but also reduces the probability of soil adhering to the inner wall of the pulverizer and the surface of the jaw plate.

As shown in Figure 4, both sides of the interior of the hopper 2 are fixedly connected with a slide table 10, the slide table 10 is located on the top of the extrusion roller 4, and the bottom surface of the slide table 10 is connected to the side of the hopper 2. The walls are fixed with a plurality of counter-attack inserts 11; when working, when the recovered concrete waste is put into the interior of the hopper 2, the concrete waste is blocked and guided by the slide table 10, so that the concrete waste is squeezed from the extrusion rollers 4 on both sides. At the same time, the concrete waste is carried by the extrusion roller 4 and hits the counter-attack insert 11, which improves the crushing degree of the concrete waste, thereby improving the effect of separating the broken wood.

As shown in Fig. 1, Fig. 2, Fig. 3, Fig. 5 and Fig. 6, the bottom of the cleaning tank is fixedly connected with a dust accumulation pallet 12, and the bottom surface of the dust accumulation pallet 12 is in contact with the inner ring of the chain conveyor belt 3. Sliding fit, the top surface of the dust accumulating pallet 12 is fixedly connected with a deep groove plate 13, and the two ends of the deep groove plate 13 are fixedly connected with both sides of the cleaning tank respectively, and the top surface bolts of the deep groove plate 13 A dust cover 14 is connected, a plurality of notches 15 are evenly opened on the top of both sides of the deep groove plate 13, a water pump 16 is fixedly connected to one side of the base 1, and the water inlet pipe of the water pump 16 is connected to a deep Inside the tank plate 13, a U-shaped water pipe 17 is fixedly connected to the outer ring of the top surface of the cleaning tank, the water outlet pipe of the water pump 16 is connected to the U-shaped water pipe 17, and the inner side of the U-shaped water pipe 17 is evenly connected to a plurality of High-pressure nozzle 18, the water blowing end of the high-pressure nozzle 18 is inclined to point to the cleaning tank; when working, the soil mixed in the concrete waste falls to the top surface of the dust-accumulating pallet 12 through the through hole of the chain plate drive belt 3, and the falling soil Blocked by the dust cover 14, the clean water inside the deep groove plate 13 is kept clean, and the water pump 16 pumps out the clean water inside the deep groove plate 13, and transports it to the inside of the U-shaped water pipe 17 through a pipeline, and sprays it obliquely into the cleaning tank through the high-pressure nozzle 18 Inside, the sprayed high-pressure water flow washes the concrete waste on the top of the chain plate conveyor belt 3, thereby further improving the soil cleaning effect on the surface of the concrete waste; the chain plate conveyor belt 3 wraps the dust accumulation pallet 12 to form a relatively static ring In the area, the velocity of water flow is reduced, and the effect of soil sedimentation is improved.

As shown in Figures 5 to 6, the inside of the deep groove plate 13 is evenly fixed with a plurality of partition plates 19, and the plurality of partition plates 19 are alternately distributed with the notches 15, and the plurality of partition plates 19 are arranged alternately. The middle part of 19 is fixedly connected with a connecting pipe 20, and the outer wall of the connecting pipe 20 is evenly provided with multiple groups of water holes 21, each group of water holes 21 corresponds to the notch 15, and each group of said water holes 21 surrounds the connecting pipe 20 uniformly. Open, the inside of the connecting pipe 20 is connected to the water inlet end of the water pump 16 through a pipeline; during work, the clear water in the inner ring of the chain plate drive belt 3 enters the inside of the deep groove plate 13 through the notch 15, and passes through a plurality of partition plates 19 to carry out The separation reduces the flow velocity of the water flow and reduces the probability of soil passing through the inside of the deep groove plate 13 .

As shown in Fig. 3 and Fig. 7, a plurality of cross bars 22 are affixed to the inside of the cleaning tank, and the cross bars 22 are located above the chain conveyor belt 3, and a plurality of cross bars 22 are evenly affixed to the top of the cross bar 22. Inclined plate 23, the inclination direction of the inclined plate 23 adjacent to the top surface of the cross bar 22 is opposite; during operation, when the chain plate drive belt 3 drives the concrete waste to the collection tank, when the concrete waste passes through the cross bar 22, it is inclined The plate 23 prevents the overturning, thereby turning over the concrete waste, and cooperates with the high-pressure water flow sprayed by the high-pressure nozzle 18 to clean the concrete waste, thereby improving the comprehensiveness of cleaning the concrete waste.

As shown in Fig. 3 and Fig. 8, a crossbeam 24 is fixedly connected to the top between the cleaning tank and the collection tank, and the side of the crossbeam 24 close to the cleaning tank is evenly bolted with a plurality of rubber sheets 25, and the rubber sheets The outer wall of 25 is affixed with a reinforced elastic piece 26, and the bottom of the reinforced elastic piece 26 is a plurality of elastic strips; during work, when concrete waste falls into the collection tank, the rubber sheet 25 and the reinforced elastic piece 26 are bent toward the collection tank, so that the concrete Waste falls into the inside of lifting net cage 9, and meanwhile, rubber sheet 25 stops the debris floating in the cleaning tank from entering the collecting tank inside.

As shown in Figures 9 and 10, the chain plate conveyor belt 3 is hinged end to end by a plurality of chain plates 27, the top surface of the chain plate 27 is uniformly provided with a plurality of through holes, and one end of the chain plate 27 is opened There is a mounting groove 28, and a slide plate 29 is slidably installed inside the mounting groove 28. A plurality of connection holes are uniformly provided on the slide plate 29, and a plurality of connection holes correspond to a plurality of through holes one by one. A rotating rod 30 is mounted on a corner of the inside, and the rotating rod 30 rotates through the top wall of the chain plate 27. A straight rack 32 is connected, the ring gear 31 meshes with the straight rack 32, the opening of the installation groove 28 is bolted with a cover plate 33, and the top surface of the chain plate 27 is evenly fixed with a cone block 34; During work, turn the rotating rod 30 to drive the ring gear 31 to rotate, drive the spur rack 32 meshed with it to move, and drive the slide plate 29 to slide inside the installation groove 28, so that the connecting hole on the slide plate 29 and the communication hole on the chain plate 27 The holes are dislocated, thereby controlling the size of the through hole of the chain plate conveyor belt 3, and then controlling the efficiency of the soil passing through the chain plate conveyor belt 3.

A high-strength and high-performance machine-made sand concrete, which is prepared by the above-mentioned production process of high-strength and high-performance machine-made sand concrete, and the machine-made sand concrete is composed of the following raw materials in parts by weight:

Cement 178-235

Gravel 800-1000

Machine-made sand 700-800

Stone powder 100-150

Fly Ash 15-59

Mineral powder 0-59

Water reducer 2-2.5

Anti-silt agent 2-2.5

water 150-200;

In the present invention, the cement is Portland cement, the 3d and 28d compressive strengths are respectively 26.1 and 43.7MPa, and the 3d and 28d flexural strengths are respectively 5.2 and 7.9MPa; crushed stones, wherein 5-15mm crushed stones account for 40%, 15 ~25 mm crushed stone accounts for 60%, the aggregate type is Class II, and the apparent density is 2695 kg/m ³ ; the fly ash is Class II, the SiO ₂ content is 53.5%, the specific surface area is 380m ² /kg, and the water content is 0.32% , the activity index is 67.9%; the water reducing agent is polycarboxylate water reducing agent, and the water reducing rate is 30%.

Example 1

A high-strength and high-performance machine-made sand concrete described in the embodiment of the present invention, the machine-made sand concrete is composed of the following raw materials in parts by weight:

Cement 235

Gravel 982

Machine-made sand 804

Stone powder 135

Fly Ash 59

Mineral powder 0

Water reducing agent 2.2

Anti-silt agent 2.2

water 171;

In this implementation, the machine-made sand concrete is prepared by the above-mentioned production process of high-strength and high-performance machine-made sand concrete; the performance of the prepared machine-made sand concrete is tested, and the test results are shown in Table 1 below.

Example 2

A high-strength and high-performance machine-made sand concrete described in the embodiment of the present invention, the machine-made sand concrete is composed of the following raw materials in parts by weight:

Cement 221.1

Gravel 979

Machine-made sand 802

Stone powder 135

Fly Ash 59

Mineral powder 14.7

Water reducing agent 2.2

Anti-silt agent 2.2

water 171;

In this implementation, the machine-made sand concrete is prepared by the above-mentioned production process of high-strength and high-performance machine-made sand concrete; the performance of the prepared machine-made sand concrete is tested, and the test results are shown in Table 1 below.

Example 3

A high-strength and high-performance machine-made sand concrete described in the embodiment of the present invention, the machine-made sand concrete is composed of the following raw materials in parts by weight:

Cement 205.4

Gravel 976

Machine-made sand 800

Stone powder 135

Fly Ash 59

Mineral powder 29.5

Water reducing agent 2.2

Anti-silt agent 2.2

water 171;

In this implementation, the machine-made sand concrete is prepared by the above-mentioned production process of high-strength and high-performance machine-made sand concrete; the performance of the prepared machine-made sand concrete is tested, and the test results are shown in Table 1 below.

Example 4

A high-strength and high-performance machine-made sand concrete described in the embodiment of the present invention, the machine-made sand concrete is composed of the following raw materials in parts by weight:

Cement 190.6

Gravel 973

Machine-made sand 798

Stone powder 135

Fly Ash 59

Mineral powder 44.2

Water reducing agent 2.2

Anti-silt agent 2.2

water 171;

In this implementation, the machine-made sand concrete is prepared by the above-mentioned production process of high-strength and high-performance machine-made sand concrete; the performance of the prepared machine-made sand concrete is tested, and the test results are shown in Table 1 below.

Example 5

A high-strength and high-performance machine-made sand concrete described in the embodiment of the present invention, the machine-made sand concrete is composed of the following raw materials in parts by weight:

Cement 178.0

gravel 970

Machine-made sand 796

Stone powder 135

Fly Ash 59

Mineral powder 58.0

Water reducing agent 2.2

Anti-silt agent 2.2

water 171;

In this implementation, the machine-made sand concrete is prepared by the above-mentioned production process of high-strength and high-performance machine-made sand concrete; the performance of the prepared machine-made sand concrete is tested, and the test results are shown in Table 1 below.

Example 6

A high-strength and high-performance machine-made sand concrete described in the embodiment of the present invention, the machine-made sand concrete is composed of the following raw materials in parts by weight:

Cement 221.5

Gravel 979

Machine-made sand 802

Stone powder 135

Fly Ash 15.0

Mineral powder 58.0

Water reducing agent 2.2

Anti-silt agent 2.2

water 171;

In this implementation, the machine-made sand concrete is prepared by the above-mentioned production process of high-strength and high-performance machine-made sand concrete; the performance of the prepared machine-made sand concrete is tested, and the test results are shown in Table 1 below.

Example 7

A high-strength and high-performance machine-made sand concrete described in the embodiment of the present invention, the machine-made sand concrete is composed of the following raw materials in parts by weight:

Cement 191.0

Gravel 973

Machine-made sand 798

Stone powder 135

Fly ash 42.5

Mineral powder 58.0

Water reducing agent 2.2

Anti-silt agent 2.2

water 171;

In this implementation, the machine-made sand concrete is prepared by the above-mentioned production process of high-strength and high-performance machine-made sand concrete; the performance of the prepared machine-made sand concrete is tested, and the test results are shown in Table 1 below.

Table 1: Test results of workability and strength of machine-made sand concrete

It can be seen from the above table:

(1) When the fly ash parameter is constant, after adding mineral powder, the slump and expansion of the machine-made sand concrete are increased, the fluidity of the concrete is improved, and the cohesion of the mixture is changed from normal to Good; it is mainly determined by the surface characteristics of mineral powder particles. The mineral powder particles are spherical in shape, smoother in appearance than cement, and difficult to absorb water molecules, so the performance is relatively stable. After the mineral powder is added, the particle gradation of each particle size in the system is more reasonable. The micro-aggregate effect produced by the mineral powder and the particle shape effect produced by the fly ash reduce the gap between the powder and ensure the fluidity of the concrete. , thereby improving the workability of concrete, which is conducive to reducing the concrete pumping resistance and enhancing the working performance of concrete; the compounding technology of mineral powder and fly ash can solve the workability and pumping performance of low-stone powder content and high-strength machine-made sand concrete. The performance cannot meet the problem of high-performance concrete; due to the low price of slag powder and fly ash, the compounding technology of slag powder and fly ash is economically feasible.

(2) When the amount of mineral powder is 58.0kg and the amount of fly ash increases from 15.0 to 59kg, the slump and expansion of concrete show an increasing trend, the slump increases from 201mm to 225mm, and the expansion increases from 416mm to 445mm , all meet the requirements of high-performance concrete; this is due to the interaction effect when mixing mineral powder and fly ash as admixtures. When the amount of mineral powder is not more than 10%, the compressive strength of machine-made sand concrete gradually increases, mainly because the addition of mineral powder can promote the secondary hydration reaction of cement to generate CSH and CH, among which CH and the Gypsum can further stimulate the hydration of mineral powder and fly ash. The hydration activity and surface energy of mineral powder are larger than that of fly ash, and the reaction speed is fast, which can help increase the CSH gel, and the Ca2+ precipitated from the mineral powder Promote the formation of CSH coagulation around the fly ash particles. Due to the dissolution of the aluminum and silicon phases in the fly ash particles, it can increase the concentration of aluminum and silicon in the hydration liquid phase and increase the hydration of the mineral powder. The process further improves the interface structure between the aggregate and the cement matrix; at the same time, the mineral powder particles are finer, which can fill the tiny pores formed after the hydration of the cement, making the concrete structure more dense and conducive to improving the compressive strength.

When 58kg and 59kg of mineral powder and fly ash are added to the concrete, the machine-made sand concrete has the best working performance, the slump and expansion are 225mm and 445mm respectively, the pumping performance is very good, and the strength meets the requirements.

With the increase of the amount of mineral powder, the slump and expansion of the machine-made sand concrete gradually increase, the fluidity of the concrete decreases first and then increases, the fluidity increases, the cohesion of the mixture is better, and the compressive strength first When the amount of mineral powder is 10%, the compressive strength of machine-made sand concrete is the highest; the increase of fly ash content leads to the continuous increase of the fluidity of machine-made sand concrete; the addition of fly ash and mineral powder has a It is beneficial to improve the fluidity of machine-made sand concrete; increasing the amount of mineral powder is conducive to improving the early compressive strength and flexural strength of machine-made sand concrete; increasing the amount of fly ash reduces the early strength of machine-made sand concrete; With the continuous increase of powder content, the fluidity of concrete presents a trend of decreasing first and then increasing.

When working: turn the rotating rod 30 to drive the ring gear 31 to rotate, drive the spur rack 32 meshed with it to move, and drive the slide plate 29 to slide inside the installation groove 28, so that the connecting hole on the slide plate 29 and the communication hole on the chain plate 27 Hole misalignment, control the size of the 3 through holes of the chain conveyor belt;

Put the recycled concrete waste into the hopper 2, and the concrete waste is blocked and guided by the sliding table 10, so that the concrete waste falls from the middle of the extrusion roller 4 on both sides, and the motor 5 drives the extrusion roller 4 on one side to rotate , drives the gear 6 to drive, and the two gears 6 mesh and drive, so that the two extrusion rollers 4 rotate relatively, and the concrete waste inside the hopper 2 is squeezed downward, so that the concrete waste is broken and the concrete waste is squeezed The roller 4 carries the impact counter insert 11, which improves the crushing degree of the concrete waste; the crushed concrete waste falls to the top of the chain conveyor belt 3 below, and the broken wood in the concrete waste is washed in the clean water in the cleaning tank. , the broken wood floats to the surface of clear water; at the same time, the gear 6 rotates to drive the pulley 7 to rotate, and through the transmission of the belt 8, it drives the chain plate drive belt 3 to rotate, so as to transmit the concrete waste to the collection tank, and at the same time make the falling concrete waste in the chain The top surface of the plate conveyor belt 3 is scattered, and the soil mixed in the concrete waste is cleaned by clear water; the soil falls down to the top surface of the dust collecting pallet 12 through the through hole of the chain plate conveyor belt 3, and the falling soil is blocked by the dust cover 14 , so that the clear water inside the deep groove plate 13 is kept clean, the water pump 16 extracts the clear water inside the deep groove plate 13, and transports it to the inside of the U-shaped water pipe 17 through the pipeline, and sprays it obliquely into the cleaning tank through the high-pressure nozzle 18. The water flow washes the concrete waste on the top of the chain plate drive belt 3;

When the chain plate drive belt 3 drives the concrete waste to be transported to the collection tank, when the concrete waste passes through the cross bar 22, it is blocked by the inclined plate 23 and turned over, and the concrete waste is turned over. The cleaning of the waste improves the comprehensiveness of the cleaning of the concrete waste; when the concrete waste falls into the collection tank, the rubber sheet 25 and the reinforcing shrapnel 26 are bent toward the collection tank, so that the concrete waste falls into the lifting cage 9 Inside, at the same time, the rubber sheet 25 blocks the debris floating in the cleaning tank from entering the inside of the collection tank; the concrete waste from removing soil and debris falls into the inside of the lifting net cage 9 in the collection tank, and the lifting net cage 9 is to be loaded After it is full, use a crane to hoist out the lifting cage 9 to obtain pure concrete waste;

After the pure concrete waste is mechanically crushed, shaped, screened and washed with water, it is prepared into machine-made sand; cement, gravel, machine-made sand, stone powder, fly ash, mineral powder and water are put into the mixing tank for mixing. And add water reducer and mud inhibitor; make machine-made sand concrete.

The above-mentioned front, back, left, right, up, and down are all based on Figure 1 in the accompanying drawings of the specification, and according to the viewing angle of the person as the standard, the side of the device facing the observer is defined as the front, and the left side of the observer is defined as the left. And so on.

In describing the present invention, it is to be understood that the terms "central", "longitudinal", "transverse", "front", "rear", "left", "right", "vertical", "horizontal", The orientations or positional relationships indicated by "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the Means that a device or element must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limiting the scope of the invention.

The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the industry should understand that the present invention is not limited by the above-mentioned embodiments. What are described in the above-mentioned embodiments and the description only illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will also have Variations and improvements are possible, which fall within the scope of the claimed invention. The protection scope of the present invention is defined by the appended claims and their equivalents.

Claims (10)

1. A production technique for high-strength and high-performance machine-made sand concrete, characterized in that: the production technique comprises the following steps: A1: Put the recovered concrete waste into the pretreatment device for pretreatment process, remove the mixed wood and soil in the concrete waste, and obtain pure concrete waste; A2: After the pure concrete waste is mechanically crushed, shaped, screened and washed with water, the apparent density is 2715kg/m ³ , the fineness modulus is 2.5, the particle gradation belongs to zone II, and the stone powder content is 3.9%. , manufactured sand with MB value of 0.8; A3: Put cement, gravel, machine-made sand, stone powder, fly ash, mineral powder and water into the mixing tank for stirring and mixing, and add water reducing agent and mud-repelling agent; make machine-made sand concrete. 2. The production process of a kind of high-strength and high-performance machine-made sand concrete according to claim 1, characterized in that: the pretreatment process of the pretreatment device comprises the following steps: B1: put the recovered concrete waste into the hopper (2), and the motor (5) drives two extrusion rollers (4) to crush the concrete waste in the hopper (2); B2: The broken concrete waste falls to the top surface of the plate chain conveyor belt (3), and the clear water in the cleaning tank washes away the soil in the concrete waste, and at the same time, makes the mixed wood chips float to the water surface; B3: The motor (5) drives the plate chain conveyor belt (3) through the transmission of the pulley (7) and the belt (8), and drives the concrete waste falling on the top surface of the plate chain conveyor belt (3) to the collection tank; B4: The concrete waste from removing soil and broken wood falls into the inside of the lifting cage (9) in the collection tank. After the lifting cage (9) is full, use the crane to lift the lifting cage (9) Hang out to get pure concrete waste. 3. The production process of high-strength and high-performance machine-made sand concrete according to claim 2, characterized in that: the pretreatment device includes a base (1), a hopper (2), a chain plate conveyor belt (3), an extrusion Roller (4), motor (5), gear (6), pulley (7), belt (8) and lifting cage (9); the top surface of the base (1) is provided with a cleaning tank, and the cleaning One end of the tank is provided with a collection tank, and a hopper (2) is fixedly connected to the top surface of the cleaning tank away from the collection tank, and squeeze rollers (4) are installed on both sides of the inside of the hopper (2). A motor (5) is fixedly connected to one side of the outer wall of the hopper (2), the rotating shaft of the motor (5) is fixedly connected to one end of a squeeze roller (4), and the outer wall of the hopper (2) is far away from the motor (5) A pair of gears (6) are installed on one side of the rotating shaft, the two gears (6) are meshed, and the two gears (6) are fixedly connected to the ends of the two extrusion rollers (4). A chain plate conveyor belt (3) is installed inside the cleaning tank, and a plurality of through holes are evenly opened on the chain plate conveyor belt (3), and one end of the drive roller of the chain plate conveyor belt (3) is connected to a Belt pulleys (7) are fixedly connected in the middle, belts (8) are arranged on the outer rings of the two pulleys (7), and a lifting cage (9) is slidably installed inside the collection tank. 4. The production process of high-strength and high-performance machine-made sand concrete according to claim 3, characterized in that: both sides of the hopper (2) are fixed with sliding material platforms (10), and the sliding material The platform (10) is located on the top of the extrusion roller (4), and the bottom surface of the sliding material platform (10) and the side wall of the hopper (2) are fixedly connected with a plurality of counter-attack inserts (11). 5. The production process of high-strength and high-performance machine-made sand concrete according to claim 3, characterized in that: the bottom of the cleaning tank is fixed with an ash accumulation pallet (12), and the ash accumulation pallet (12) ) is slidingly matched with the inner ring of the chain conveyor belt (3), and the top surface of the dust accumulating pallet (12) is fixed with a deep groove plate (13), and the two ends of the deep groove plate (13) are respectively It is fixedly connected to both sides of the cleaning tank, the top surface of the deep groove plate (13) is bolted with a dust cover (14), and the top of both sides of the deep groove plate (13) is evenly opened with a plurality of notches ( 15), a water pump (16) is fixedly connected to one side of the base (1), the water inlet pipe of the water pump (16) is connected to the inside of the deep groove plate (13), and the top outer ring of the cleaning tank A U-shaped water pipe (17) is fixedly connected, and the water outlet pipe of the water pump (16) is connected to the U-shaped water pipe (17). The inner side of the U-shaped water pipe (17) is evenly connected with a plurality of high-pressure nozzles (18). The blowing end of the high-pressure nozzle (18) is inclined to the cleaning tank. 6. The production process of high-strength and high-performance machine-made sand concrete according to claim 5, characterized in that: the inside of the deep groove plate (13) is evenly fixed with a plurality of partition plates (19), and a plurality of The partition plates (19) and notches (15) are distributed alternately, the middle parts of the multiple partition plates (19) are fixedly connected with connecting pipes (20), and the outer walls of the connecting pipes (20) are evenly opened with A plurality of groups of water holes (21), each group of water holes (21) corresponds to the notch (15), and each group of water holes (21) is evenly opened around the connecting pipe (20), and the connecting pipe (20) The inside is connected to the water inlet end of the water pump (16) through a pipeline. 7. The production process of high-strength and high-performance machine-made sand concrete according to claim 3, characterized in that: a plurality of cross bars (22) are fixed inside the cleaning tank, and the cross bars (22) are located at Above the chain conveyor belt (3), the top of the cross bar (22) is evenly fixed with a plurality of inclined plates (23), and the inclined direction of the inclined plates (23) adjacent to the top surface of the cross bar (22) on the contrary. 8. The production process of high-strength and high-performance machine-made sand concrete according to claim 3, characterized in that: a beam (24) is fixed on the top between the cleaning tank and the collection tank, and the beam (24) A plurality of rubber sheets (25) are evenly bolted to the side close to the cleaning tank, and the outer wall of the rubber sheet (25) is fixed with a reinforcing elastic sheet (26), and the bottom of the reinforcing elastic sheet (26) is a plurality of elastic strips . 9. The production process of high-strength and high-performance machine-made sand concrete according to claim 3, characterized in that: the chain plate conveyor belt (3) is formed by a plurality of chain plates (27) hinged end to end, and the chain plate The top surface of (27) is evenly opened with a plurality of through holes, and one end of the chain plate (27) is opened with a mounting groove (28), and a slide plate (29) is slidably installed inside the mounting groove (28). The slide plate (29) is evenly provided with a plurality of connection holes, which correspond to a plurality of through holes one by one, and a rotating rod (30) is installed inside the installation groove (28), and the rotating rod ( 30) Rotate through the top wall of the chain plate (27), the outer ring of the rotating rod (30) is fixed with a ring gear (31), and the side of the sliding plate (29) close to the rotating rod (30) is fixed with a The straight rack (32), the ring gear (31) meshes with the straight rack (32), the opening of the installation groove (28) is bolted with a cover plate (33), and the chain plate (27) The top surface is evenly fixed with a cone block (34). 10. A high-strength and high-performance machine-made sand concrete, characterized in that: the machine-made sand concrete is prepared by a production process of a high-strength and high-performance machine-made sand concrete according to any one of claims 1-9, and the machine-made sand concrete Consists of the following raw materials in parts by weight: Cement 178-235 Gravel 800-1000 Machine-made sand 700-800 Stone powder 100-150 Fly Ash 15-59 Mineral powder 0-59 Water reducer 2-2.5 Anti-silt agent 2-2.5 Water 150-200.

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