Production process of green high-performance concrete

Abstract

The invention discloses a production process of green high-performance concrete, and relates to the technical field of concrete building material preparation. According to the invention, the waste building ceramic material is used as the aggregate after crushing and impurity removal, so that the strength grade and the impermeability are improved, and the concrete is prepared by replacing the aggregate such as traditional stone and the like, and is green and environment-friendly; the waste fibers, the polyacrylonitrile-based carbon fibers and the polyethylene glycol are added, so that the breaking strength and the elastic modulus are improved under the action of sudden stress change. According to the hammering magnetic separation equipment for matched production, by arranging the replacing mechanism and the mounting mechanism, a new collecting frame is mounted in the mounting groove, a magnetic metal material can slide into the collecting frame, and then the full collecting frame can be taken out of the mounting groove to be treated; by means of the design, the collecting frame can be replaced conveniently, the top end of the guide base is shielded in the replacing process, and the magnetic metal material is prevented from scattering. The preparation method is simple, convenient and feasible, and is suitable for large-scale industrial production

Description

Technical Field

[0001] The invention relates to the technical field of concrete building material preparation, in particular to a production process of green high-performance concrete. Background Art

[0002] Green high-performance concrete (GHPC) refers to a new type of concrete material made with the help of recyclable materials, renewable energy and low-carbon technology. It has many advantages such as high strength, good durability and low carbon emissions. Among them, "green" means that the natural resources and carbon emissions consumed by this concrete during the production and use stages are relatively small, and the impact on the natural environment is minimal, which is highly consistent with the requirements of sustainable development; and "high performance" indicates that this concrete has high strength, excellent durability and other mechanical properties, which can effectively improve the safety of building structures and thus extend the service life of buildings. GHPC has excellent fluidity, which is conducive to transmission and pumping, good filling performance to fill the gaps between densely distributed steel bars, and good cohesive performance to stick to steel bars and embedded parts. GHPC has a low structural porosity and can effectively resist the destructive force caused by external factors. It does not crack during the hardening process, has a dense structure after hardening, and is not prone to macro cracks and micro cracks. The application advantages of GHPC are relatively obvious. Therefore, it is necessary to give full play to the role of GHPC in construction projects according to the preparation and application points of GHPC to improve the quality of construction projects.

[0003] In the production and preparation process of green high-performance concrete, the existing technology generally uses fly ash, silica fume, quartz powder and other industrial waste residues to replace traditional cement clinker to enhance the strength and durability of green high-performance concrete. For example, the Chinese invention patent with application number 202010639481.6 and publication number CN111848014A discloses a green high-performance concrete and its preparation method, which contains cement, fly ash, aggregate, kaolin, red mud, carbide slag, water reducer and water. The preparation method is as follows: step 1: mix cement, fly ash and water reducing agent, mix evenly and then divide into 2-4 portions; step 2: add aggregate, kaolin, red mud and carbide slag to the mixed material prepared in step 1 in sequence, stir evenly and prepare a mixture; step 3: add water to the remaining mixed material prepared in step 1, stir for 1-2 minutes, then add the mixture to the mixed material in 3-5 times, stir for 5-6 minutes, mix all the materials evenly and prepare the desired concrete, which has the advantages of good compressive strength and flexural strength. However, the durability of the concrete prepared by the patented technology needs to be further improved, and there is still room for improvement in mechanical strength.

[0004] Furthermore, a Chinese invention patent with application number 202311723961.0 and publication number CN117534416A discloses a green high-performance concrete, which relates to the field of building materials technology. The concrete is made of the following raw materials in parts by weight: 180-220 parts of cement, 20-30 parts of cast stone powder, 10-15 parts of mica powder, 3-5 parts of water-soluble polyphenylene sulfide, 50-80 parts of coal gangue, 10-20 parts of silica slag powder, 200-280 parts of shale pottery sand, 200-300 parts of natural coarse aggregate, 3-5 parts of polycarboxylic acid water reducer, 1-3 parts of waste boron fiber, 0.5-1.5 parts of 2,3-quinolinedicarboxylic acid, 0.3-0.8 parts of quinoline yellow, and 0.3-0.5 parts of adenosine. Due to the addition of water-soluble polyphenylene sulfide, 2,3-quinolinedicarboxylic acid, adenosine and cast stone powder, green high-performance concrete has good flexural strength and resistance to freeze-thaw cycles, but its impermeability grade needs to be improved.

[0005] In addition, since green high-performance concrete is mostly produced using renewable energy as the main raw material, during the preparation process, impurities such as magnetic metals in renewable waste generated in construction or other fields need to be removed in advance. In the existing technology, there is no special screening and removal equipment to perform automated production operations for this link, which inevitably leads to the omission of magnetic metal waste in the production process, which has an adverse effect on the mechanical properties of concrete.

[0006] Therefore, in view of the current status of GHPC development and application, it is very necessary to design a green high-performance concrete with high strength grade, good elastic modulus and impermeability grade, as well as good flexural strength and antifreeze performance. Summary of the invention

[0007] The purpose of the present invention is to solve the problems existing in the background technology. The purpose of the present invention is to provide a production process of green high-performance concrete with high strength grade, good elastic modulus and impermeability grade, and good flexural strength and antifreeze performance.

[0008] To achieve the above object, the present invention provides the following technical solution: A production process of green high-performance concrete, which is prepared from the following components in parts by weight: 80-150 parts of Portland cement; 30-50 parts of basic aggregate; 30-50 parts of ceramic aggregate; 10-30 parts of quartz sand; 10-20 parts of water reducing agent; 5-10 parts of waste fiber; 2 to 8 parts of polyacrylonitrile-based carbon fiber; 1-3 parts of polyethylene glycol; 100-180 parts of water.

[0009] As a further solution of the present invention: the silicate cement is 42.5 grade PO or PC silicate cement, the basic aggregate includes crushed stone and fine aggregate, and the mass ratio of crushed stone to fine aggregate is 1: (1.5-3); the crushed stone is a continuously graded crushed stone of 5-35 mm; the fine aggregate is any one of manganese slag powder, limestone powder, and fly ash or a mixture of several thereof, and the particle size is ≤2.50 mm; the fly ash is grade II fly ash, the loss on ignition is ≤2%, and the mud content is ≥60%; the building ceramic aggregate is building ceramic powder, and the particle size is ≤2.50 mm; the quartz sand has a particle size of 800-1500 mesh and an apparent density of 1800-2400 kg / cm 3 ; The water reducer is a polycarboxylic acid water reducer; the waste fiber is any one or more of waste glass fiber, steel fiber, and polypropylene fiber materials; the average diameter of the polyacrylonitrile-based carbon fiber is 10 to 15 microns and the average length is 2 to 5 mm.

[0010] A production process of green high-performance concrete comprises the following steps: S1: Preparation of ceramic aggregates; The waste building ceramic materials are hammered with hammer magnetic separation equipment to remove the waste metal and plastic foreign matter; the waste building ceramic materials are then crushed with a jaw crusher and a disc grinder to a size of less than 2.5 mm, washed and dried, and set aside; S2: prepare base material; Add the proportion of silicate cement, crushed stone and fine aggregate of the base aggregate, the ceramic aggregate prepared in step S1, and quartz sand into a mixing tank in sequence, and stir and mix at a speed of 200 to 300 r / min at room temperature and pressure until the mixture is evenly mixed and then set aside; S3: Preparation of green high performance concrete; Add the waste fibers, polyacrylonitrile-based carbon fibers, water reducer, polyethylene glycol and water in a proportioned amount into a mixing tank in sequence and mix with the spare base material prepared in step S2, and stir evenly at a speed of 150 to 300 r / min to obtain the green high-performance concrete.

[0011] As a further solution of the present invention: the hammer magnetic separation equipment used in step S1 includes a hammer crusher, a conveyor belt is arranged below the hammer crusher, a magnetic separation roller is installed at one end of the conveyor belt, a guide seat for guiding magnetic metal materials is arranged below one end of the conveyor belt, a screening machine is arranged on one side of the guide seat, and a collecting frame for collecting magnetic metal materials is arranged on the other side of the guide seat, and the collecting frame is replaced by a replacement mechanism.

[0012] As a further scheme of the present invention: the replacement mechanism includes a base, the base is fixedly connected to one side of the bottom of the guide seat, the top of the base is provided with a movable groove, the inner wall of the movable groove is slidably connected with a movable frame, the top of the movable frame is provided with a mounting groove, the collection frame is connected to the mounting groove, a groove is provided on one side outer wall of the movable frame, the top of the guide seat is rotatably connected with a baffle, one end of the baffle is fixedly connected with a first spur gear, the guide seat is internally located at the bottom end of the first spur gear and is slidably connected with a displacement rod, a first spring is connected between the displacement rod and the guide seat, the guide seat is internally located at the bottom end of the displacement rod and is slidably connected with an extrusion rod, the guide seat is internally located at the bottom end of the extrusion rod and is slidably connected with a protrusion, the protrusion extends into the inner cavity of the movable groove, and the collection frame is connected to the mounting groove through a mounting mechanism.

[0013] As a further scheme of the present invention: the mounting mechanism includes a fixing slot, the fixing slot is symmetrically opened on the inner wall of the mounting slot, the collection frame is symmetrically and slidably connected with a fixing block extending from the collection frame, the outer wall of the fixing block is fixedly connected with an elastic sheet, the collection frame is slidably connected with a pushing frame that passes through the fixing block, the pushing frame is in an inverted T shape, the top of the pushing frame is fixedly connected with a displacement seat, the displacement seat is slidably connected to the outer wall of the collection frame, the outer wall of the displacement seat is fixedly connected with a handle, a positioning slot is opened on one side inner wall of the movable slot, the movable frame is slidably connected with a positioning block extending from the movable frame, the positioning block and the movable frame are connected with a second spring, the movable frame is located inside the bottom end of the positioning block and is rotatably connected to a second spur gear, the movable frame is located inside the bottom end of the second spur gear and is slidably connected to an extrusion block, and the extrusion block extends into the inner cavity of the mounting slot.

[0014] As a further solution of the present invention: the inner wall of the movable groove is in contact with the outer wall of the movable frame, and a semicircular surface is provided at one end of the protrusion.

[0015] As a further solution of the present invention: the bottom end of the extrusion rod is provided with a first inclined surface, the outer wall of the protrusion is in contact with the first inclined surface, the bottom end of the displacement rod is provided with a second inclined surface, the top end of the extrusion rod is in contact with the second inclined surface, the top end of the displacement rod is provided with a tooth groove, and the tooth groove is meshed with the first spur gear.

[0016] As a further solution of the present invention: the inner wall of the installation groove fits with the outer wall of the collection frame, the inner wall of the fixing groove fits with the outer wall of the fixing block, the bottom end of the fixing block is provided with a third inclined surface, and the bottom cross bar portion of the pushing frame is in contact with the third inclined surface; a fourth inclined surface is provided at the lower part of the extended end of the fixing block.

[0017] As a further solution of the present invention: the outer walls of the positioning block and the extrusion block are both provided with gear teeth, the gear teeth are meshed with the second spur gear, and the extrusion block is provided with a fifth inclined surface at one end located in the inner cavity of the installation groove, and the inner wall of the positioning groove is in contact with the outer wall of the positioning block.

[0018] Compared with the prior art, the present invention has the following beneficial effects: 1. The production process of green high-performance concrete described in the present invention uses waste building ceramic materials as the main raw materials, which are used as aggregates after crushing and impurity removal, thereby improving the strength grade and impermeability, replacing traditional stone and other aggregates to prepare concrete, and is green and environmentally friendly.

[0019] 2. The preparation of the green high-performance concrete of the present invention adds glass fiber, steel fiber, polypropylene fiber, polyacrylonitrile-based carbon fiber and polyethylene glycol, which improves the flexural strength and elastic modulus under the action of sudden stress. The preparation method is simple and easy, and is suitable for large-scale industrial production and application.

[0020] 3. The present invention specially designs a hammer magnetic separation device for the preparation process. The hammer magnetic separation device installs the new collection frame into the installation slot by setting a replacement mechanism and an installation mechanism, and then pushes the movable frame to move. At this time, the baffle rotates to block the top of the guide seat and block the magnetic metal material until the new collection frame moves to one side of the guide seat. At this time, the protrusion can move into the groove, and the displacement rod is reset by the elastic force of the first spring, thereby driving the baffle to open, so that the magnetic metal material can slide along the guide seat into the collection frame, and then the filled collection frame can be taken out of the installation slot for processing; this design facilitates the replacement of the collection frame, and during the replacement process, the top of the guide seat is blocked to prevent the magnetic metal material from scattering. The equipment is conducive to improving the efficiency of removing magnetic metals in process step S1, and can collect magnetic metal materials and use them for other purposes, further improving the utilization rate of resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the hammer magnetic separation equipment of the present invention; Figure 2 It is a structural schematic diagram of the base of the hammer magnetic separation equipment of the present invention; Figure 3 It is a schematic diagram of the installation of the movable frame of the hammer magnetic separation equipment of the present invention; Figure 4 It is a schematic diagram of the installation of the protrusion of the hammer magnetic separation equipment of the present invention; Figure 5 It is a schematic diagram of the internal structure of the movable frame of the hammer magnetic separation equipment of the present invention; Figure 6 This is a schematic diagram of the internal structure of the collection frame of the hammer magnetic separation device of the present invention; Figure 7 It is a schematic structural diagram of a fixed block of the hammer magnetic separation device of the present invention; Figure 8 This is a schematic diagram of the installation of the extrusion block of the hammer magnetic separation equipment of the present invention.

[0022] In the figure: 1. hammer crusher; 2. conveyor belt; 3. magnetic separation roller; 4. screening machine; 5. guide seat; 6. collecting frame; 7. replacement mechanism; 701. base; 702. movable groove; 703. movable frame; 704. mounting groove; 705. groove; 706. baffle; 707. first spur gear; 708. displacement rod; 709. first spring; 710. extrusion rod; 711. protrusion; 8. mounting mechanism; 801. fixed groove; 802. fixed block; 803. elastic sheet; 804. pushing frame; 805. displacement seat; 806. handle; 807. positioning groove; 808. positioning block; 809. second spring; 810. second spur gear; 811. extrusion block. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following is an explanation of an embodiment of the present invention based on the overall structure of the present invention.

[0025] Example 1: A production process for green high performance concrete The green high performance concrete described in the embodiment of the present invention is prepared from the following components in parts by weight: 80 parts of Portland cement; 50 parts of base aggregate; 30 parts of ceramic aggregate; 10 parts of quartz sand; 10 parts of water reducing agent; 8 parts of waste glass fiber; 2 parts of polyacrylonitrile-based carbon fiber; 1 part of polyethylene glycol; 100 parts of water.

[0026] The silicate cement is 42.5 grade PO silicate cement, the basic aggregate includes crushed stone and fine aggregate, the mass ratio of crushed stone to fine aggregate is 1:1.5; the crushed stone is 5-35 mm continuous graded crushed stone; the fine aggregate is any one of manganese slag powder, limestone powder, fly ash or a mixture of several thereof, with a particle size of ≤2.50 mm; the fly ash is grade II fly ash, with a loss on ignition of ≤2% and a mud content of ≥60%; the building ceramic aggregate is building ceramic powder, with a particle size of ≤2.50 mm; the quartz sand has a particle size of 800-1500 mesh and an apparent density of 1800-2400 kg / cm 3 ; The water reducer is a polycarboxylic acid water reducer; the average diameter of the polyacrylonitrile-based carbon fiber is 10 to 15 microns and the average length is 2 to 5 mm.

[0027] The production process of green high performance concrete comprises the following steps: S1: Preparation of building ceramic aggregates: Hammering the waste building ceramic materials with hammer magnetic separation equipment to remove waste metal and plastic foreign matter; then crushing the waste building ceramic materials after impurities removal with a jaw crusher and a disc grinder to a size of less than 2.5 mm, washing and drying them for standby use; S2: preparing base materials: adding a proportion of silicate cement, crushed stone and fine aggregate of base aggregate, ceramic aggregate prepared in step S1, and quartz sand to a mixing tank in sequence, and mixing them at a speed of 200 to 300 r / min at room temperature and pressure until they are evenly mixed and then set aside; S3: preparing green high-performance concrete: adding the waste fiber, polyacrylonitrile-based carbon fiber, water reducer, polyethylene glycol and water in a proportioned amount into a mixing tank in sequence and mixing with the spare base material prepared in step S2, stirring evenly at a speed of 300 r / min to obtain green high-performance concrete.

[0028] In this embodiment: waste building ceramic materials are used as raw materials and then crushed and impurity-removed as aggregates, which improves the strength grade and impermeability, replaces traditional aggregates such as stone to prepare concrete, and is green and environmentally friendly; glass fiber, steel fiber, polypropylene fiber, polyacrylonitrile-based carbon fiber and polyethylene glycol are added, and the flexural strength and elastic modulus are improved under the action of sudden stress. The preparation method is simple and easy, and is suitable for large-scale industrial production and application.

[0029] Please refer to Figures 1 to 8 The hammer magnetic separation equipment used in step S1 includes a hammer crusher 1, a conveyor belt 2 is arranged below the hammer crusher 1, a magnetic separation roller 3 is installed at one end of the conveyor belt 2, a guide seat 5 for guiding magnetic metal materials is arranged below one end of the conveyor belt 2, a screening machine 4 is arranged on one side of the guide seat 5, and a collecting frame 6 for collecting magnetic metal materials is arranged on the other side of the guide seat 5. The collecting frame 6 is replaced by a replacement mechanism 7.

[0030] In this embodiment: the hammer crusher 1 crushes brittle materials such as ceramics and glass; the magnetic separation roller 3 generates a magnetic field, which can absorb the magnetic metal material in the crushed material. The magnetic material is attracted by the magnetic separation roller 3 and slides along one side of the guide seat 5 into the collection frame 6 for collection operation; finally, the remaining material after hammer crushing and magnetic separation enters the screening machine 4 along the other side of the guide seat 5, and is screened by the screening machine 4. Since the non-magnetic metal and plastic in the remaining material are plastic materials, they will not be crushed too finely, so they can be screened out during screening, and finally the screened material can enter the jaw crusher.

[0031] Please refer to Figures 1 to 4 The replacement mechanism 7 includes a base 701, which is fixedly connected to one side of the bottom of the guide seat 5. A movable groove 702 is provided at the top of the base 701. A movable frame 703 is slidably connected to the inner wall of the movable groove 702. A mounting groove 704 is provided at the top of the movable frame 703. The collection frame 6 is connected to the mounting groove 704. A groove 705 is provided on one side of the outer wall of the movable frame 703. A baffle 706 is rotatably connected to the top of the guide seat 5. One end of the baffle 706 is fixedly connected to the first straight Gear 707, the interior of the guide seat 5 is located at the bottom end of the first straight gear 707 and is slidably connected with a displacement rod 708, a first spring 709 is connected between the displacement rod 708 and the guide seat 5, the interior of the guide seat 5 is located at the bottom end of the displacement rod 708 and is slidably connected with an extrusion rod 710, the interior of the guide seat 5 is located at the bottom end of the extrusion rod 710 and is slidably connected with a protrusion 711, the protrusion 711 extends into the inner cavity of the movable groove 702, and the collection frame 6 is connected to the installation groove 704 through the installation mechanism 8.

[0032] There are two grooves 705 , which respectively correspond to the contact positions of the sliding frame 703 with the protrusion 711 at two fixed positions.

[0033] In this embodiment, when the collecting frame 6 is replaced, the new collecting frame 6 is installed into the installation groove 704, and then the movable frame 703 is pushed to move. At this time, the protrusion 711 moves out of the groove 705, and the displacement of the protrusion 711 pushes the extrusion rod 710 to move, and the displacement of the extrusion rod 710 pushes the displacement rod 708 to move, which squeezes the first spring 709. The displacement of the displacement rod 708 drives the first straight gear 707 to rotate, and the rotation of the first straight gear 707 drives the baffle 706 to rotate, and the baffle 706 rotates to the top of the guide seat 5. The magnetic metal material is blocked until the new collection frame 6 moves to one side of the guide seat 5. At this time, the protrusion 711 can move into the groove 705, and the displacement rod 708 is reset by the elastic force of the first spring 709, thereby driving the baffle 706 to open, so that the magnetic metal material can slide along the guide seat 5 into the collection frame 6, and then the filled collection frame 6 can be taken out from the installation groove 704 for processing; this design facilitates the replacement of the collection frame 6, and the top of the guide seat 5 is blocked during the replacement process to prevent the magnetic metal material from scattering.

[0034] Please refer to Figures 5 to 8 The mounting mechanism 8 includes a fixing groove 801, which is symmetrically arranged on the inner wall of the mounting groove 704. The interior of the collection frame 6 is symmetrically slidably connected with a fixing block 802 extending from the collection frame 6. The outer wall of the fixing block 802 is fixedly connected with an elastic sheet 803. The interior of the collection frame 6 is slidably connected with a push frame 804 that passes through the fixing block 802. The push frame 804 is in an inverted T shape. The top of the push frame 804 is fixedly connected with a displacement seat 805. The displacement seat 805 is slidably connected to the outer wall of the collection frame 6. The outer wall of the displacement seat 805 A handle 806 is fixedly connected, a positioning groove 807 is opened on the inner wall of one side of the movable groove 702, a positioning block 808 extending from the movable frame 703 is slidably connected inside the movable frame 703, a second spring 809 is connected between the positioning block 808 and the movable frame 703, a second spur gear 810 is rotatably connected to the bottom end of the positioning block 808 inside the movable frame 703, an extrusion block 811 is slidably connected to the bottom end of the second spur gear 810 inside the movable frame 703, and the extrusion block 811 extends into the inner cavity of the mounting groove 704.

[0035] There are two positioning grooves 807 , which respectively correspond to the insertion positions of the positioning block 808 at two fixed positions of the sliding frame 703 .

[0036] In this embodiment: when installing the collection frame 6, the collection frame 6 is installed into the installation groove 704, and the fixing block 802 is engaged into the fixing groove 801 by the elastic force of the elastic sheet 803 to fix the collection frame 6; when removing the collection frame 6, the handle 806 is pushed upward to displace it, and the displacement of the handle 806 drives the displacement seat 805 to displace, and the displacement of the displacement seat 805 drives the pushing frame 804 to displace, and the displacement of the pushing frame 804 drives the fixing block 802 to displace, and the fixing block 802 moves out of the fixing groove 801, thereby canceling the fixation of the collection frame 6.

[0037] When the collecting frame 6 is installed into the installation groove 704, the collecting frame 6 contacts the extruding block 811, pushing the extruding block 811 to move. The displacement of the extruding block 811 drives the second spur gear 810 to rotate. The rotation of the second spur gear 810 drives the positioning block 808 to move, causing the second spring 809 to be squeezed. The positioning block 808 moves out of the positioning groove 807, canceling the fixation of the movable frame 703, and the movable frame 703 can be moved; when the collecting frame 6 has not entered the installation groove 704, the positioning block 808 is engaged into the positioning groove 807 by the elastic force of the second spring 809, thereby preventing the installation groove 704 from slipping.

[0038] Please refer to Figures 1 to 4 The inner wall of the movable groove 702 is in contact with the outer wall of the movable frame 703 , and one end of the protrusion 711 is provided with a semicircular surface.

[0039] In this embodiment, the movable frame 703 is pushed to move, and the movable frame 703 slides in the movable groove 702 , and the protrusion 711 is forced to move out of the groove 705 .

[0040] Please refer to Figures 1 to 4 The bottom end of the extrusion rod 710 is provided with a first inclined surface, the outer wall of the protrusion 711 contacts the first inclined surface, the bottom end of the displacement rod 708 is provided with a second inclined surface, the top end of the extrusion rod 710 contacts the second inclined surface, and the top end of the displacement rod 708 is provided with a tooth groove, which meshes with the first spur gear 707.

[0041] In this embodiment: the displacement of the protrusion 711 pushes the extrusion rod 710 to move, the displacement of the extrusion rod 710 pushes the displacement rod 708 to move, causing the first spring 709 to be squeezed, the displacement of the displacement rod 708 drives the first spur gear 707 to rotate, and the rotation of the first spur gear 707 drives the baffle 706 to rotate.

[0042] Please refer to Figures 5 to 8The inner wall of the mounting groove 704 fits with the outer wall of the collecting frame 6, the inner wall of the fixing groove 801 fits with the outer wall of the fixing block 802, a third inclined surface is arranged at the bottom end of the fixing block 802, and the bottom cross bar of the pushing frame 804 contacts the third inclined surface; a fourth inclined surface is arranged at the lower part of the extended end of the fixing block 802.

[0043] In this embodiment: the handle 806 is pushed upward to move, the displacement of the handle 806 drives the displacement seat 805 to move, the displacement of the displacement seat 805 drives the pushing frame 804 to move, the displacement of the pushing frame 804 drives the fixing block 802 to move, the fixing block 802 moves out of the fixing slot 801, and the fixing of the collection frame 6 is cancelled.

[0044] Please refer to Figures 5 to 8 The outer walls of the positioning block 808 and the extrusion block 811 are both provided with gear teeth, which mesh with the second spur gear 810. A fifth inclined surface is provided at one end of the extrusion block 811 located in the inner cavity of the installation groove 704, and the inner wall of the positioning groove 807 fits with the outer wall of the positioning block 808.

[0045] In this embodiment: when the collecting frame 6 is installed into the installation groove 704, the collecting frame 6 contacts the extrusion block 811, pushing the extrusion block 811 to move, and the displacement of the extrusion block 811 drives the second spur gear 810 to rotate, and the rotation of the second spur gear 810 drives the positioning block 808 to move, causing the second spring 809 to be squeezed, and the positioning block 808 moves out of the positioning groove 807, canceling the fixation of the movable frame 703.

[0046] Example 2 The green high performance concrete described in the embodiment of the present invention is prepared from the following components in parts by weight: 115 parts of Portland cement; 30 parts of base aggregate; 40 parts of ceramic aggregate; 20 parts of quartz sand; 15 parts of water reducing agent; 5 pieces of scrap steel brazing; 5 parts of polyacrylonitrile-based carbon fiber; 2 parts of polyethylene glycol; 140 parts of water.

[0047] The silicate cement is 42.5 grade PO silicate cement, the basic aggregate includes crushed stone and fine aggregate, the mass ratio of crushed stone to fine aggregate is 1:2; the crushed stone is 5-35 mm continuous graded crushed stone; the fine aggregate is any one of manganese slag powder, limestone powder, fly ash or a mixture of several thereof, with a particle size of ≤2.50 mm; the fly ash is grade II fly ash, with a loss on ignition of ≤2% and a mud content of ≥60%; the building ceramic aggregate is building ceramic powder, with a particle size of ≤2.50 mm; the quartz sand has a particle size of 800-1500 mesh and an apparent density of 1800-2400 kg / cm 3 ; The water reducer is a polycarboxylic acid water reducer; the average diameter of the polyacrylonitrile-based carbon fiber is 10 to 15 microns and the average length is 2 to 5 mm.

[0048] The production process of green high performance concrete comprises the following steps: S1: Preparation of building ceramic aggregates: Hammering the waste building ceramic materials with hammer magnetic separation equipment to remove waste metal and plastic foreign matter; then crushing the waste building ceramic materials after impurities removal with a jaw crusher and a disc grinder to a size of less than 2.5 mm, washing and drying them for standby use; S2: preparing base materials: adding a proportion of silicate cement, crushed stone and fine aggregate of base aggregate, ceramic aggregate prepared in step S1, and quartz sand to a mixing tank in sequence, and mixing them at a speed of 200 to 300 r / min at room temperature and pressure until they are evenly mixed and then set aside; S3: preparing green high-performance concrete: adding the waste fiber, polyacrylonitrile-based carbon fiber, water reducing agent, polyethylene glycol and water in a proportioned amount into a mixing tank in sequence and mixing with the spare base material prepared in step S2, stirring evenly at a speed of 150 to 300 r / min to obtain green high-performance concrete.

[0049] The hammer magnetic separation equipment used and its application are the same as those in Example 1 and will not be described in detail here.

[0050] Example 3 The green high performance concrete described in the embodiment of the present invention is prepared from the following components in parts by weight: 150 parts of Portland cement; 40 parts of base aggregate; 50 parts of ceramic aggregate; 30 parts of quartz sand; 20 parts of water reducing agent; 10 parts of waste polypropylene fiber; 8 parts of polyacrylonitrile-based carbon fiber; 3 parts of polyethylene glycol; 180 parts of water.

[0051] The silicate cement is 42.5 grade PC silicate cement, the basic aggregate includes crushed stone and fine aggregate, the mass ratio of crushed stone to fine aggregate is 1:3; the crushed stone is 5-35 mm continuous graded crushed stone; the fine aggregate is any one of manganese slag powder, limestone powder, fly ash or a mixture of several thereof, with a particle size of ≤2.50 mm; the fly ash is grade II fly ash, with a loss on ignition of ≤2% and a mud content of ≥60%; the building ceramic aggregate is building ceramic powder, with a particle size of ≤2.50 mm; the quartz sand has a particle size of 800-1500 mesh and an apparent density of 1800-2400 kg / cm 3 ; The water reducer is a polycarboxylic acid water reducer; the average diameter of the polyacrylonitrile-based carbon fiber is 10 to 15 microns and the average length is 2 to 5 mm.

[0052] The production process of green high performance concrete comprises the following steps: S1: Preparation of building ceramic aggregates: Hammering the waste building ceramic materials with hammer magnetic separation equipment to remove waste metal and plastic foreign matter; then crushing the waste building ceramic materials after impurities removal with a jaw crusher and a disc grinder to a size of less than 2.5 mm, washing and drying them for standby use; S2: preparing base materials: adding a proportion of silicate cement, crushed stone and fine aggregate of base aggregate, ceramic aggregate prepared in step S1, and quartz sand to a mixing tank in sequence, and mixing them at a speed of 200 to 300 r / min at room temperature and pressure until they are evenly mixed and then set aside; S3: preparing green high-performance concrete: adding the waste fiber, polyacrylonitrile-based carbon fiber, water reducing agent, polyethylene glycol and water in a proportioned amount into a mixing tank in sequence and mixing with the spare base material prepared in step S2, stirring evenly at a speed of 150 to 300 r / min to obtain green high-performance concrete.

[0053] The hammer magnetic separation equipment used and its application are the same as those in Example 1 and will not be described in detail here.

[0054] Comparative Example 1: The same as in Example 2 except that ceramic aggregate is not used.

[0055] Comparative Example 2: The same as in Example 2 except that the waste fibers are not used.

[0056] Comparative Example 2: The same as in Example 2 except that polyethylene glycol was not used.

[0057] Green high performance concrete performance testing: In order to evaluate the specific performance indicators of the green high-performance concrete of the present invention, each example of green high-performance concrete was poured into a mold, and after vibration compaction, the mold was sealed and naturally cured for 24 hours at a temperature of 22±2°C and a relative humidity of ≥90%, and then demolded. The curing age after demolding was 28 days. Relevant performance tests were carried out, and the test results are shown in Table 1. The test methods refer to GB / T50081-2019 "Standard for Test Methods of Physical and Mechanical Properties of Concrete" and GB / T50082-2009 "Standard for Test Methods of Long-term Performance and Durability of Ordinary Concrete".

[0058]

[0059] In summary, the present invention uses waste building ceramic materials as raw materials and uses them as aggregates after crushing and impurity removal, thereby improving the strength grade and anti-seepage performance, replacing traditional aggregates such as stone to prepare concrete, and being green and environmentally friendly; waste glass fiber, steel fiber, polypropylene fiber, polyacrylonitrile-based carbon fiber and polyethylene glycol are added to improve the flexural strength and elastic modulus under the action of sudden stress.

[0060] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A production process of green high performance concrete, characterized in that: Green high performance concrete is made from the following components in parts by weight: 80-150 parts of Portland cement; 30-50 parts of basic aggregate; 30-50 parts of ceramic aggregate; 10-30 parts of quartz sand; 10-20 parts of water reducing agent; 5-10 parts of waste fiber; 2 to 8 parts of polyacrylonitrile-based carbon fiber; 1-3 parts of polyethylene glycol; 100-180 parts of water.

2. A production process of green high performance concrete according to claim 1, characterized in that: The silicate cement is 42.5 grade PO or PC silicate cement, the basic aggregate includes crushed stone and fine aggregate, and the mass ratio of crushed stone to fine aggregate is 1: (1.5-3); the crushed stone is a continuous graded crushed stone of 5-35 mm; the fine aggregate is any one or a mixture of manganese slag powder, limestone powder, and fly ash, and the particle size is ≤2.50 mm; the fly ash is Class II fly ash, the loss on ignition is ≤2%, and the mud content is ≥60%; the building ceramic aggregate is building ceramic powder, and the particle size is ≤2.50 mm; the quartz sand particle size is 800-1500 mesh, and the apparent density is 1800-2400 Kg / cm3; the water reducer is a polycarboxylic acid water reducer; the waste fiber is any one or more of waste glass fiber, steel brazing fiber, and polypropylene fiber material; the average diameter of the polyacrylonitrile-based carbon fiber is 10-15 microns and the average length is 2-5 mm.

3. A production process of green high performance concrete according to claim 2, characterized in that: The steps include: S1: Preparation of ceramic aggregate; The waste building ceramic materials are hammered with hammer magnetic separation equipment to remove the waste metal and plastic foreign matter; the waste building ceramic materials are then crushed with a jaw crusher and a disc grinder to a size of less than 2.5 mm, washed and dried, and set aside; S2: prepare base material; Add the proportion of silicate cement, crushed stone and fine aggregate of the base aggregate, the ceramic aggregate prepared in step S1, and quartz sand into a mixing tank in sequence, and stir and mix at a speed of 200 to 300 r / min at room temperature and pressure until the mixture is evenly mixed and then set aside; S3: Preparation of green high performance concrete; Add the waste fibers, polyacrylonitrile-based carbon fibers, water reducer, polyethylene glycol and water in a proportioned amount into a mixing tank in sequence and mix with the spare base material prepared in step S2, and stir evenly at a speed of 150 to 300 r / min to obtain the green high-performance concrete.

4. A production process of green high performance concrete according to claim 3, characterized in that: The hammer magnetic separation equipment used in step S1 comprises a hammer crusher (1), a conveyor belt (2) is arranged below the hammer crusher (1), a magnetic separation roller (3) is installed at one end of the conveyor belt (2), a guide seat (5) for guiding magnetic metal materials is arranged below one end of the conveyor belt (2), a screening machine (4) is arranged on one side of the guide seat (5), and a collection frame (6) for collecting magnetic metal materials is arranged on the other side of the guide seat (5), and the collection frame (6) is replaced by a replacement mechanism (7).

5. A production process of green high performance concrete according to claim 4, characterized in that: The replacement mechanism (7) comprises a base (701), the base (701) being fixedly connected to one side of the bottom of the guide seat (5), a movable groove (702) being provided at the top of the base (701), a movable frame (703) being slidably connected to the inner wall of the movable groove (702), a mounting groove (704) being provided at the top of the movable frame (703), the collection frame (6) being connected to the mounting groove (704), a groove (705) being provided on one side of the outer wall of the movable frame (703), a baffle (706) being rotatably connected to the top of the guide seat (5), and one end of the baffle (706) being fixedly connected to a first spur gear ( 707), a displacement rod (708) is slidably connected to the bottom end of the first spur gear (707) inside the guide seat (5), a first spring (709) is connected between the displacement rod (708) and the guide seat (5), an extrusion rod (710) is slidably connected to the bottom end of the displacement rod (708) inside the guide seat (5), a protrusion (711) is slidably connected to the bottom end of the extrusion rod (710) inside the guide seat (5), the protrusion (711) extends into the inner cavity of the movable groove (702), and the collection frame (6) is connected to the installation groove (704) through the installation mechanism (8).

6. A production process of green high performance concrete according to claim 5, characterized in that: The mounting mechanism (8) comprises a fixing groove (801), the fixing groove (801) being symmetrically arranged on the inner wall of the mounting groove (704), the interior of the collecting frame (6) being symmetrically slidably connected with a fixing block (802) extending from the collecting frame (6), the outer wall of the fixing block (802) being fixedly connected with an elastic sheet (803), the interior of the collecting frame (6) being slidably connected with a pushing frame (804) penetrating the fixing block (802), the pushing frame (804) being in an inverted T-shape, the top end of the pushing frame (804) being fixedly connected with a displacement seat (805), the displacement seat (805) being slidably connected to the outer wall of the collecting frame (6), the displacement seat (805) A handle (806) is fixedly connected to the outer wall of the movable groove (702); a positioning groove (807) is opened on the inner wall of one side of the movable groove (702); a positioning block (808) extending from the movable frame (703) is slidably connected inside the movable frame (703); a second spring (809) is connected between the positioning block (808) and the movable frame (703); a second spur gear (810) is rotatably connected to the bottom end of the positioning block (808) inside the movable frame (703); an extrusion block (811) is slidably connected to the bottom end of the second spur gear (810) inside the movable frame (703); and the extrusion block (811) extends into the inner cavity of the mounting groove (704).

7. The production process of green high performance concrete according to claim 5, characterized in that: The inner wall of the movable groove (702) fits the outer wall of the movable frame (703), and one end of the protrusion (711) is provided with a semicircular surface.

8. The production process of green high performance concrete according to claim 5, characterized in that: The bottom end of the extrusion rod (710) is provided with a first inclined surface, and the outer wall of the protrusion (711) is in contact with the first inclined surface. The bottom end of the displacement rod (708) is provided with a second inclined surface, and the top end of the extrusion rod (710) is in contact with the second inclined surface. The top end of the displacement rod (708) is provided with a tooth groove, and the tooth groove is meshed with the first spur gear (707).

9. The production process of green high performance concrete according to claim 6, characterized in that: The inner wall of the mounting groove (704) fits with the outer wall of the collecting frame (6), the inner wall of the fixing groove (801) fits with the outer wall of the fixing block (802), a third inclined surface is provided at the bottom end of the fixing block (802), and the bottom cross bar of the pushing frame (804) contacts the third inclined surface; a fourth inclined surface is provided at the lower part of the extended end of the fixing block (802).

10. The production process of green high performance concrete according to claim 6, characterized in that: The outer walls of the positioning block (808) and the extrusion block (811) are both provided with gear teeth, the gear teeth meshing with the second spur gear (810), a fifth inclined surface is provided at one end of the extrusion block (811) located in the inner cavity of the installation groove (704), and the inner wall of the positioning groove (807) fits with the outer wall of the positioning block (808).

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