A kind of crack-resistant concrete and its production method

Abstract

The invention belongs to the technical field of concrete processing, and specifically, is a crack-resistant concrete and a production method thereof; the method comprises the following steps: step one: dry-mixing part of the materials in a mixing barrel; step two: gradually adding lignin, water and the remaining part of stone and ceramsite; step three: continuously mixing and stirring the concrete materials to obtain the crack-resistant concrete; the composition of the crack-resistant concrete prepared by the crack-resistant concrete production and preparation method comprises: taking cement, medium sand, stone, ceramsite, crack-resistant fiber, lignin, water reducer and water according to mass fractions; after part of the stone and ceramsite are separately put into the mixing barrel, dry-mixing them together with the medium sand, crack-resistant fiber, water reducer and cement, and after subsequently adding water and lignin, a water film can be quickly formed on the surface of the stone and ceramsite, so that after the stone and ceramsite are subsequently added, cement slurry and mortar can quickly penetrate between the stone and ceramsite.

Description

Technical Field

[0001] The invention belongs to the technical field of concrete processing, and specifically relates to crack-resistant concrete and a production method thereof. Background Art

[0002] Since the tensile strength of concrete is much smaller than its compressive strength and its ultimate tensile deformation is very small, it is easy to crack under the influence of external forces, temperature changes, humidity changes, etc. In order to improve the integrity of concrete structures, it is necessary to set requirements for the crack resistance of concrete to prevent large-scale cracking of concrete walls or the overall floor of the building, which may cause safety hazards. The main reasons for the easy cracking of concrete depend on the types of raw materials, material mix ratio, construction technology, structural design and operating conditions.

[0003] Measures to improve the crack resistance of concrete include: increasing the strength of concrete to increase certain crack resistance; using crushed stone and expanded clay to prepare concrete and increasing the proportion of expanded clay to increase the ultimate tensile strength; using cement with high tetracalcium aluminate content and low tricalcium aluminate content. Summary of the invention

[0004] In order to achieve the purpose of preparing crack-resistant concrete with high ultimate tensile strength, the present invention adopts the following technical scheme:

[0005] The purpose of the present invention is to provide a method in which part of the crushed stone and ceramsite are mixed into a mixing barrel in batches when the crushed stone and ceramsite are put in a high proportion, so that the initial combination effect of the crushed stone and ceramsite with cement slurry and mortar is higher, thereby increasing the batching efficiency.

[0006] In order to achieve the above object, the present invention provides a method for producing crack-resistant concrete, comprising the following steps:

[0007] Step 1: dry mix some stone, ceramsite, medium sand, anti-cracking fiber, water reducing agent and cement in a mixing barrel;

[0008] Step 2: During the mixing process, gradually add lignin, water and the remaining stone and ceramsite;

[0009] Step 3: Continuously mixing and stirring the concrete material to obtain crack-resistant concrete;

[0010] Step 4: Open the discharge cover at the bottom of the mixing barrel and discharge the anti-cracking concrete for use.

[0011] After putting some of the stone and expanded clay into the mixing barrel separately, they are dry-mixed with medium sand, anti-cracking fiber, water reducer and cement. After adding water and lignin, a water film can be quickly formed on the surface of the stone and expanded clay, so that after the subsequent addition of stone and expanded clay, cement slurry and mortar can quickly penetrate between the stone and expanded clay.

[0012] The composition of the anti-cracking concrete prepared by the anti-cracking concrete production and preparation method includes: cement, medium sand, stone, ceramsite, anti-cracking fiber, lignin, water reducing agent and water according to mass proportions. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The following drawings are intended only to illustrate and explain the present invention, wherein:

[0014] Figure 1 The process flow chart of the production method of crack-resistant concrete of the present invention;

[0015] Figure 2 The material composition diagram of the crack-resistant concrete of the present invention;

[0016] Figure 3 It is a structural schematic diagram of the processing platform, mixing barrel and stone material discharge barrel of the present invention;

[0017] Figure 4 It is a structural schematic diagram of the cross bar, the chute plate and the discharge nozzle of the present invention;

[0018] Figure 5 It is a schematic structural diagram of the spiral stirring plate and the eccentric column frame of the present invention;

[0019] Figure 6 It is a structural schematic diagram of the suspension, stone material discharge barrel and disassembly cover of the present invention;

[0020] Figure 7 It is a schematic structural diagram of the rubber pile and the curved panel of the present invention;

[0021] Figure 8 It is a schematic diagram of the structure of the driving wheel shaft, the semicircular protrusion and the arc panel of the present invention;

[0022] Fig. 9 It is a schematic structural diagram of the rocker arm, the driving rod and the slot arm of the present invention;

[0023] Fig.10 It is a schematic structural diagram of the rocker arm, the positioning ring and the slot arm of the present invention;

[0024] Fig.11 It is a schematic structural diagram of the driving rod of the present invention.

[0025] In the figure: mixing barrel 11; discharge cover 12; suspension 21; stone discharge barrel 22; disassembly cover 23; cross bar 24; slide plate 25; discharge nozzle 26; spiral stirring plate 31; drive wheel shaft 32; eccentric column frame 33; semicircular protrusion 34; rocker arm 41; drive rod 42; positioning ring 43; slot arm 44; rubber pile 45; curved panel 46. DETAILED DESCRIPTION

[0026] In order to achieve the purpose of preparing crack-resistant concrete with high ultimate tensile strength, the present invention provides a method for producing crack-resistant concrete, comprising the following steps:

[0027] Step 1: dry mix some stone materials, ceramsite, medium sand, anti-cracking fiber, water reducing agent and cement in a mixing barrel 11;

[0028] Step 2: During the mixing process, gradually add lignin, water and the remaining stone and ceramsite;

[0029] Step 3: Continuously mixing and stirring the concrete material to obtain crack-resistant concrete;

[0030] Step 4: Open the discharge cover 12 at the bottom of the mixing barrel 11 to discharge the anti-cracking concrete for use.

[0031] After some of the stone and expanded clay are separately put into the mixing barrel 11, they are dry-mixed with medium sand, anti-cracking fiber, water reducer and cement, and then water and lignin are added. The remaining stone and expanded clay are added to the mixing barrel 11 in batches, so that the cement slurry and mortar in the initial configuration maintain good fluidity to improve the subsequent material configuration efficiency.

[0032] The composition of the crack-resistant concrete prepared by the crack-resistant concrete production and preparation method includes: 200-300 parts of cement, 130-200 parts of medium sand, 180-360 parts of stone, 50-180 parts of ceramsite, 80-100 parts of crack-resistant fiber, 30-80 parts of lignin, 3-8 parts of water reducer and 160-300 parts of water in parts by mass.

[0033] The specific embodiments of the present invention are described below.

[0034] Reference Figure 3-6 and Figure 8 As shown, an embodiment of the method for producing crack-resistant concrete provided by the present invention is described, in which materials are mixed and stirred in a mixing barrel 11:

[0035] The production and processing of the crack-resistant concrete of the present application is carried out on a processing platform, on which a mixing barrel 11 and a stone discharge barrel 22 are installed through two brackets. By flipping the stone discharge barrel 22, the placement of part of the stone and expanded clay in the mixing barrel 11 is controlled.

[0036] Among them, the cross-section of the stone discharge barrel 22 is a perfect circle, and a spiral stirring plate 31 is installed in the mixing barrel 11 for horizontal rotation. The projection of the spiral stirring plate 31 in the axial direction is an ellipse. Therefore, when the spiral stirring plate 31 rotates around its own axis, part of the material is pushed through an incomplete shoveling method, and the material is mixed and stirred during the reciprocating rotation.

[0037] The integrated arrangement of the spiral stirring plate 31 can improve the maintenance performance of the equipment.

[0038] A discharge cover 12 is detachably fixedly connected to the lower end of the side of the mixing barrel 11. By opening the discharge cover 12, the prepared anti-cracking concrete can be discharged for use.

[0039] Reference Figure 3-6 As shown, an embodiment of the method for producing crack-resistant concrete provided by the present invention is described, in which the stone and ceramsite in the stone material discharge barrel 22 are dynamically put into the mixing barrel 11 in batches:

[0040] The upper side of the processing platform is fixedly connected to two suspensions 21 by fasteners, and both ends of the stone material discharge barrel 22 are installed with cross bars 24 by fasteners and flange structures, and the cross bars 24 on both sides are rotatably installed between the two suspensions 21;

[0041] A connecting member may be installed between the cross bar 24 and the spiral stirring plate 31 , so that when the spiral stirring plate 31 mixes the materials in the mixing barrel 11 , the stones and ceramsite in the stone discharge barrel 22 are dynamically put into the mixing barrel 11 in batches according to the mixing process.

[0042] A discharge nozzle 26 is provided at the side of the stone discharge barrel 22 , through which stones are added into the stone discharge barrel 22 or discharged from the stone discharge barrel 22 in batches.

[0043] Among them, a disassembly cover 23 for extending inward into the cleaning water pipe is installed at the end of the stone discharge barrel 22.

[0044] Reference Figure 3 As shown, the method for producing crack-resistant concrete provided by the present invention is described, for an embodiment of the rotation drive of the spiral stirring plate 31:

[0045] The spiral stirring plate 31 is welded and fixedly connected with a driving wheel shaft 32 , and a driving motor for driving the driving wheel shaft 32 to rotate is installed on the processing platform.

[0046] A driving gear is installed on the output shaft of the driving motor through a flat key or a wedge key, and the driving gear is connected to the driving wheel shaft 32 through a belt; the driving motor is started to drive the spiral stirring plate 31 to rotate around its own axis, so that the spiral stirring plate 31 can mix and stir the materials during the reciprocating rotation process.

[0047] Reference Figure 3-6 and Figure 9-10 As shown, the method for producing crack-resistant concrete provided by the present invention is described, which drives the stone material discharge barrel 22 to shake back and forth, and puts the stone and ceramsite in the stone material discharge barrel 22 into the embodiment:

[0048] A rocker arm 41 is slidably mounted on the cross bar 24. The rocker arm 41 can rotate on the cross bar 24 and can also slide along the axis of the cross bar 24.

[0049] A groove arm 44 is provided at the lower end of the rocker arm 41 on one side, and the groove arm 44 is slidably connected to the eccentric column frame 33 on the spiral stirring plate 31. When the spiral stirring plate 31 rotates around its own axis, the eccentric column frame 33 moves in the slide groove on the groove arm 44, thereby driving the stone discharge barrel 22 to rock back and forth, and the stone and expanded clay in the stone discharge barrel 22 are released.

[0050] Among them, the slot arm 44 is installed on the rocker arm 41 through the positioning ring 43, the positioning ring 43 is installed on the rocker arm 41 on one side through a fastener, the slot arm 44 and the positioning ring 43 are detachably fixedly connected through at least two studs, and the studs are screwed into the positioning ring 43 and the slot arm 44 at the same time to complete the installation of the slot arm 44.

[0051] Reference Figure 3-6 and Figure 8-11 As shown, an embodiment of the method for producing crack-resistant concrete provided by the present invention is described, in which the stones and ceramsite in the stone material discharge barrel 22 are evenly put into the mixing barrel 11 in batches:

[0052] A driving rod 42 is vertically slidably mounted on the rocker arms 41 on both sides, a slide plate 25 is welded and fixedly connected to the side of the stone material discharge barrel 22, and the driving rod 42 is slidably connected to the notch on the slide plate 25;

[0053] A ring is installed on the rocker arm 41 through fasteners, and a telescopic driver is installed on the ring. The movable end of the telescopic driver is connected to the driving rod 42 through fasteners. The telescopic driver can use an electric telescopic rod or a hydraulic cylinder. By starting the telescopic driver, the stone discharge barrel 22 is driven to rotate relative to the rocker arm 41, thereby increasing the rotation control performance of the stone discharge barrel 22, so that the stone and expanded clay can be evenly put into the mixing barrel 11 in batches. During this process, the eccentric column frame 33 limits the slot arm 44.

[0054] The two rocker arms 41 are fixedly connected by welding through a cross bar, so that the rotation control of the stone discharge barrel 22 relative to the rocker arm 41 is more stable.

[0055] Reference Figure 6-11 As shown, the method for producing crack-resistant concrete provided by the present invention is described, in which the stone is placed flat in the stone material discharge barrel 22 so that the stone and ceramsite are placed stably:

[0056] Rubber piles 45 are installed inside the two rocker arms 41 . The rubber piles 45 can abut against the end of the stone discharge barrel 22 to oscillate the stone discharge barrel 22 so that the stones can be laid flat in the stone discharge barrel 22 .

[0057] A curved plate 46 is welded and fixedly connected to the rocker arm 41 near the driving wheel shaft 32. The arc center of the curved plate 46 is coaxially arranged with the virtual axis of the crossbar 24.

[0058] The outer edge of the arc panel 46 abuts against the outer side of the shaft of the driving wheel shaft 32 . Two semicircular protrusions 34 are welded and fixedly connected to the shaft of the driving wheel shaft 32 . The spherical surfaces of the two semicircular protrusions 34 abut against the edges on both sides of the arc panel 46 .

[0059] During the rotation of the driving wheel shaft 32, the two semicircular protrusions 34 alternately abut against the two sides of the arc plate 46, driving the arc plate 46 to slide back and forth along the axis direction of the cross bar 24, realizing the synchronous movement control of the two rocker arms 41, causing the rubber piles 45 to impact and vibrate the stone discharge barrel 22, so that the stone is placed flat in the stone discharge barrel 22, and the stone is placed smoothly during the gradual rotation of the stone discharge barrel 22.

[0060] The position of the slot arm 44 on the positioning ring 43 is adjusted to increase the moving space for the rocker arms 41 on both sides to move synchronously along the axis direction of the crossbar 24 to avoid collision between the slot arm 44 and the eccentric column frame 33 .

Claims

1. A method for producing crack-resistant concrete, characterized in that: The following steps are involved: Step 1: dry-mixing part of the stone, ceramsite, medium sand, anti-cracking fiber, water reducing agent and cement in a mixing barrel (11); Step 2: During the mixing process, gradually add lignin, water and the remaining stone and ceramsite; Step 3: Continuously mixing and stirring the concrete material to obtain crack-resistant concrete; Step 4: Open the discharge cover (12) at the bottom of the mixing barrel (11) to discharge the anti-cracking concrete for use; The mixing barrel (11) is mounted on the upper side of the processing platform through a bracket. A stone discharge barrel (22) for storing stones is also mounted on the processing platform. The cross section of the stone discharge barrel (22) is a perfect circle. A spiral stirring plate (31) is mounted in the mixing barrel (11) for transverse rotation. The axis of the spiral stirring plate (31) is projected into an ellipse. When the spiral stirring plate (31) rotates with its own axis as the axis, part of the material is pushed by incomplete shoveling, and the material is mixed and stirred during the reciprocating rotation; The stone material discharge barrel (22) is rotatably mounted between two suspensions (21) on the processing platform through a cross bar (24) at its end, and part of the stone material is poured into the mixing barrel (11) from a discharge nozzle (26) at the side of the stone material discharge barrel (22) through the rotation of the stone material discharge barrel (22); The spiral stirring plate (31) is welded and fixedly connected with a driving wheel shaft (32), and a driving motor for driving the driving wheel shaft (32) to rotate is installed on the processing platform; A rocker arm (41) is slidably mounted on the crossbar (24), a slot arm (44) is provided at the lower end of the rocker arm (41) on one side, and the slot arm (44) is slidably connected to an eccentric column frame (33) on the spiral stirring plate (31); A driving rod (42) is vertically slidably connected to the rocker arm (41), and the driving rod (42) is slidably connected to a chute plate (25) welded and fixedly connected to the side of the stone material discharge barrel (22); The slot arm (44) is mounted on the rocker arm (41) via a positioning ring (43), and the slot arm (44) and the positioning ring (43) are detachably fixedly connected via a stud; The discharge cover (12) is installed at the lower end of the side of the mixing barrel (11); The end of the stone material discharge barrel (22) is provided with a disassembly cover (23) for extending inwardly into a cleaning water pipe; Rubber piles (45) are installed inside the two rocker arms (41), and the rubber piles (45) can abut against the end of the stone material discharge barrel (22) to perform an oscillation treatment on the stone material discharge barrel (22), so that the stone is placed flat in the stone material discharge barrel (22); A curved panel (46) is welded and fixedly connected to the rocker arm (41) on one side close to the driving wheel shaft (32), and the arc center of the curved panel (46) is coaxially arranged with the virtual axis of the crossbar (24). The outer edge of the arc panel (46) is in contact with the outer side of the shaft of the driving wheel shaft (32), and two semicircular protrusions (34) are welded and fixedly connected to the shaft of the driving wheel shaft (32), and the spherical surfaces of the two semicircular protrusions (34) are respectively in contact with the edges on both sides of the arc panel (46); During the rotation of the driving wheel shaft (32), the two semicircular protrusions (34) alternately abut against the two sides of the arc plate (46), driving the arc plate (46) to slide back and forth along the axis direction of the cross bar (24), thereby realizing the synchronous movement control of the two rocker arms (41), causing the rubber pile (45) to impact and vibrate the stone material discharge barrel (22), so that the stone is placed flat in the stone material discharge barrel (22), and the stone is placed stably during the gradual rotation of the stone material discharge barrel (22).

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