JP2012127158A - Floor surface construction method and floor surface structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a floor surface construction technology capable of constructing a concrete floor surface having extremely high strength as well as excellent durability without generating embrittlement and detachment on a surface of solidified concrete.SOLUTION: A hardening layer on a superficial layer section of concrete is constructed by: first spreading concrete reinforcement agent and a concrete modifying agent over a concrete surface C2 which has a plurality of grooves 53 thereon formed by scratching the concrete surface before solidification with a roughening member 52 of a floor surface construction device 10; then compacting the concrete surface by rolling and pressing the same with a rolling compaction device; and pressure leveling and surface smoothing of the concrete surface with a floor surface finishing device when the concrete surface is moderately cured. Because laitance on the surface of the concrete is buried into the concrete in a manner that diffuses and infiltrates the laitance together with the concrete reinforcement agent as well as the concrete modifying agent, a dense hardening layer produced in a chemical reaction between calcium in the concrete and the modifying agent is formed on the superficial layer section of the concrete.

Description

  The present invention relates to a construction technique for a concrete floor such as a reinforced concrete construction or a structure.

  In the construction of a concrete floor surface, a latency is often generated by a breathing phenomenon on the concrete surface after being placed on the floor surface and before solidification. Latency is a layered substance formed by raising limestone fine particles and aggregate fine particles in cement to the concrete surface along with breathing.

  When the subsequent finishing operation is performed in a state in which the latency is present on the concrete surface, the surface layer portion of the concrete surface after solidification may be extremely brittle and easily cracked or peeled off.

  In order to prevent such adverse effects, techniques for removing latency generated on the concrete surface after placing have been proposed (see, for example, Patent Documents 1, 2, and 3). In addition, a method of preventing embrittlement and peeling of the surface layer portion by applying a reinforcing agent to the solidified concrete surface to polymerize the concrete surface (polymer coating) is also employed.

  Moreover, the technique which raises the intensity | strength of a concrete surface layer part by spraying the reinforcement | strengthening powder on the concrete surface before solidification is proposed (for example, refer patent document 4).

JP 7-305506 A Japanese Utility Model Publication No. 6-30213 JP 2000-319853 A Japanese Patent Application Laid-Open No. 8-174431

  Even if the techniques described in Patent Literatures 1 to 3 are adopted in concrete floor construction, the latency cannot be completely removed, so that the surface layer portion of the concrete floor is embrittled and peeled off by the latency remaining on the concrete surface. Can not be avoided.

  In addition, the method of applying a surface reinforcing material to the concrete surface after solidification can only strengthen a very thin region of the concrete surface, and therefore, as described above, it is impossible to avoid the occurrence of embrittlement and peeling of the concrete surface.

  The problem to be solved by the present invention is to provide a technique for forming a concrete floor surface that does not cause embrittlement and exfoliation of the concrete surface after solidification, and has extremely high strength and excellent durability.

  The floor surface construction method of the present invention includes a step of roughening a concrete surface before solidification, a step of spreading a concrete reinforcing agent on the roughened concrete surface, and pressurizing the concrete surface on which the concrete reinforcing agent is dispersed. And a process.

  In such a configuration, by roughening the concrete surface before solidification, the layer film-like latency existing on the concrete surface is divided and crushed, and the concrete reinforcing agent to be sprayed after this is roughened. High strength is achieved by increasing the dispersibility of the concrete reinforcing agent in the concrete before solidification and eliminating the voids remaining in the concrete by pressing the concrete surface on which the concrete reinforcing agent is sprayed. The hardened layer can be formed. For this reason, the concrete surface after solidification does not cause embrittlement and peeling, and a concrete floor surface having extremely high strength and excellent durability can be formed.

  Further, the floor surface construction method of the present invention includes a step of roughening a concrete surface before solidification, a step of spreading a concrete reinforcing agent on the roughened concrete surface, and a concrete surface on which the concrete reinforcing agent is dispersed. A step of spraying the concrete modifier and a step of pressurizing the concrete surface on which the concrete modifier is sprayed are provided.

  By spraying the concrete modifier on the concrete surface where the concrete reinforcing agent has been sprayed, as the concrete solidifies, a dense hardened layer in which the concrete reinforcing agent is scattered is formed on the surface layer of the concrete. It is possible to prevent embrittlement and peeling of the concrete surface. There are many unclear reasons for this, but the latency that was divided and crushed in the roughening process diffused and infiltrated from the concrete surface along with the concrete modifier, resulting in a state where calcium in the concrete and the concrete modifier were buried. It is presumed that a dense hardened layer containing a glassy substance and a concrete reinforcing agent generated by a chemical reaction is formed on the surface layer portion of the concrete.

  In addition, by pressurizing the concrete surface on which the concrete modifier is sprayed, the permeability of the concrete modifier to the concrete surface before solidification and the dispersibility of the concrete reinforcing agent in the concrete are increased, and the concrete surface remains in the concrete. Since the voids to be removed can be eliminated, a very high-strength cured layer can be formed.

  In the roughening step, the surface can be roughened by scratching the concrete surface before solidification with a harder member.

  With such a configuration, the layer film-like latency existing on the concrete surface before solidification can be roughened while being continuously crushed, so the dispersibility of the concrete reinforcing agent sprayed in the subsequent process In addition, the permeability of concrete modifiers is increased, the latency is buried, and the strength of the hardened layer is improved.

  Moreover, in the said roughening process, the surface can also be roughened by pressing a harder member against the concrete surface before solidification.

  With such a configuration, it is possible to roughen while breaking or breaking through the layer film-like latency existing on the concrete surface before solidification, so that the dispersibility of the concrete reinforcing agent and the concrete modifier in the subsequent steps This increases the permeability of the material, promotes the burial of the latency, and is effective in improving the strength of the hardened layer.

  Furthermore, it is desirable to pressurize the concrete surface on which the concrete reinforcing agent or the concrete modifier is sprayed with a roller-type rolling device.

  With such a configuration, the surface layer portion of the concrete is compacted by the pressure of the roller of the compaction device, and the voids in the concrete disappear and become dense, which is effective in improving the strength of the hardened layer. It can eliminate unevenness and unevenness of the concrete surface.

  On the other hand, it is desirable that the concrete reinforcing agent contains powdered metal aggregate.

  If such a concrete reinforcing agent is used, a hardened layer solidified in a state where powdered metal aggregate is dispersed is formed on the surface layer portion of the concrete surface, so that a concrete floor having extremely high strength and excellent durability. You can get a plane.

  The concrete modifier preferably contains one or a plurality of polymer dispersions of ethylene vinyl acetate, polyacrylate, and styrene butadiene rubber latex.

  When such a concrete modifier is used, a hardened layer having a high density and high strength can be formed on the surface layer portion of the concrete by reacting with the components in the concrete. In addition to the styrene butadiene rubber, natural rubber latex, chloroprene rubber, methyl methacrylate butadiene rubber, and acrylonitrile butadiene rubber can be used as the rubber latex, and the ethylene vinyl acetate and polyacrylic are used as the thermoplastic resin emulsion. Besides acid ester, styrene acrylate ester, vinyl polypropionate, polypropylene, polyvinyl acetate, vinyl acetate versatate etc. can be used, and epoxy resin can be used as thermosetting resin emulsion, As the history emulsion, asphalt, rubber asphalt, paraffin or the like can be used.

  Next, the floor structure of the present invention is characterized in that a hardened layer in which a concrete reinforcing agent is mixed or a hardened layer in which a concrete reinforcing agent and a concrete modifier colorant are mixed is provided on a surface layer portion of a concrete floor surface. To do. Here, the thickness of the hardened layer is preferably about 1 mm to 30 mm.

  INDUSTRIAL APPLICABILITY According to the present invention, it is possible to provide a technique for forming a concrete floor surface that does not cause embrittlement and exfoliation on the concrete surface after solidification and has extremely high strength and excellent durability.

It is a perspective view which shows the roughening process of the concrete surface which makes a part of process of the floor surface construction method which is embodiment of this invention. It is the sectional view on the AA line in FIG. It is sectional drawing which shows the dispersion | distribution process of the concrete reinforcement which makes a part of floor surface construction method which is embodiment of this invention. It is sectional drawing which shows the spraying process of the concrete modifier which makes a part of floor surface construction method which is embodiment of this invention. It is a perspective view which shows the compaction apparatus used in a floor surface construction method. It is a figure which shows the use condition of the compaction apparatus shown in FIG. It is a perspective view which shows the compaction apparatus which is other embodiment. It is a side view which shows the floor finishing apparatus used in a floor construction method.

  The floor construction method which is an embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a step of roughening a concrete surface before solidification using a floor surface construction apparatus 10 after concrete placement. The floor construction apparatus 10 includes three pressure rollers 11, 12, and 13 that are arranged so that their axes are parallel to each other on the same virtual plane, and both ends of the pressure rollers 11, 12, and 13. A pair of holding members 14 that rotatably hold each other, a flat plate-like connecting member 15 disposed in parallel with the rollers 11, 12, 13 between the left and right holding members 14, and pressure rollers 11-13. A brush 18 that is slidably in contact with the concrete surface before moving, a rake-like roughening member 52 that forms a plurality of grooves 53 on the concrete surface after the pressure rollers 11 to 13 roll. And an operation handle 19 attached to the upper surface of the connecting member 15.

  The operation handle 19 includes a horizontal portion 19h that is held by an operator, a connecting portion 19a extending from the left and right of the horizontal portion 19h toward the connecting member 15, a horizontal reinforcing portion 19b that connects the connecting portions 19a, and The front end portion of the connecting portion 19a is detachably attached to an L-shaped connecting member 29 that is formed as described above and attached to the upper surface of the connecting member 15 via the joining member 16.

  In the floor construction apparatus 10, the direction in which the roughening member 52 is attached is referred to as the front (or the front), the direction in which the brush 18 is attached is referred to as the rear (or the back), and the rear of the operation handle 19. In addition, the top, bottom, left and right are displayed based on the worker standing up in the posture toward the connecting member 15.

  The pressure rollers 11 to 13 are cylindrical members having the same size and formed of a metal whose outer peripheral surface is smooth. The pressure rollers 11, 12, 13 are a pair of side members fixed to the left and right of the holding member 14 via support shafts 11 s, 12 s, 13 s and bearings 11 a, 12 a, 13 a that project from both left and right ends. 14s is rotatably attached to each. The holding member 14 is a substantially U-shaped member in plan view formed by the pair of left and right side members 14s described above and a front member 14f that connects the front end portions of the side members 14s. A long brush 18 is detachably attached so as to connect the ends.

  A reinforcing member 21 having an L-shaped cross section is attached in front of the front member 14f of the holding member 14 through a plurality of hinges 20 in parallel with the front member 14f, and the roughening member 52 is detachable along the reinforcing member 21. Is attached. In the roughening member 52, a plurality of claw materials 51 are arranged at predetermined intervals along the longitudinal direction (left-right direction). The roughening member 52 is rotatable up and down around the hinge 20 together with the reinforcing member 21, and the front member 14 f of the holding member 14 and the reinforcing member 21 are connected by an inverted V-shaped link mechanism 23. A proximal end portion of the operation wire 25 whose distal end portion is locked to the link mechanism 23 is locked to an operation rod 24 provided on the operation handle 19.

  When the operating rod 24 is moved back and forth along the cylinder 24 s, the operating wire 25 enters and exits, whereby the roughening member 52 rotates up and down around the hinge 20. When the operating rod 24 is set in front of the cylinder 24s, the tip of the claw material 51 of the roughening member 52 comes into contact with the concrete surface. The operating rod 24 is pulled rearward along the cylinder 24s and then tilted rightward. Then, when the base end portion of the operating rod 24 is fitted into the bay-shaped portion 24b of the cylinder 24s, the tip of the claw material 51 of the roughening member 52 is locked in a state of being separated from the concrete surface.

  A pair of support posts 26 erected on the left and right sides of the reinforcing member 21 are provided with a flange-like stopper 27 and a buffer material 28, and a weight 22 is detachably attached to the upper surface side of the buffer material 28. The weight 22 is for pressing the tip of the claw material 51 of the roughening member 52 toward the concrete surface. By changing the type and number of the weights 22, the claw material 51 is pressed against the concrete surface. The pressure can be adjusted. A mechanism for connecting the grip-like pulling means provided on the operation handle 19 and the roughening member 52 with a wire without using the weight 22 and generating a pressing force of the nail material 51 by the force applied to the pulling means. Can also be adopted.

  When the floor construction apparatus 10 is brought on the concrete surface C1 before solidification, which is the work target, and the operation rod 24 is set in front of the cylinder 24s, the roughening member 52 is lowered by the action of the weight 22 and the nail material 51 is removed. The tip is inserted into the concrete surface C1. In this state, when the operator grasps the operation handle 19 and pulls it backward, the pressure rollers 11 to 13 roll, the roughening member 52 moves backward, and a plurality of grooves 53 are formed on the concrete surface C1. The In this case, since the groove 53 is not limited to a substantially straight line in a certain direction, a groove in a direction intersecting with the groove 53 can be additionally formed, or a curved groove can be formed.

  As shown in FIG. 2, on the concrete surface C <b> 2 after the plurality of grooves 53 are formed in the roughening step, the layered film-like latency 54 generated on the concrete surface C <b> 1 before solidification is divided by the plurality of grooves 53. It will be in a crushed state. The depth of the groove 53 is not limited, but it is desirable to ensure at least about 1 mm to 30 mm.

  Next, as shown in FIG. 3, powdered concrete reinforcing agent 56 (hereinafter referred to as “reinforcing agent 56”) is uniformly applied to the concrete surface C2 after the roughening process. As a result, the reinforcing agent 56 is dispersed on the concrete surface C2 where the divided and crushed latency 54 exists and into the plurality of grooves 53.

  Thereafter, as shown in FIG. 4, a liquid concrete modifier 55 (hereinafter referred to as “modifier 55”) is uniformly applied on the concrete surface C3 on which the reinforcing agent 56 is dispersed. As a result, the modifier 55 penetrates into the surface layer portion of the concrete through the concrete surface C3 and the inner surface of the groove 53. Further, the latency 54 in a state of being divided and crushed is buried in the concrete along with the modifier 55.

  When the spraying of the modifier 55 is finished, the concrete surface C3 is pressurized using a roller-type compacting device 30 shown in FIG. As shown in FIG. 6, when the compaction device 10 placed on the concrete surface C4 after the reinforcing agent 56 and the modifier 55 are dispersed is moved backward (in the direction of the arrow R1), the compaction device 10 The concrete surface C4 is rolled and pressed by the three rotatable pressure rollers 11 to 13 provided.

  As a result, the reinforcing agent 56 and the modifier 55 penetrate into the concrete, and the surface layer portion of the concrete surface C4 is compacted and densified, and the breathing path (void) that causes cracks after solidification also disappears. In addition, unevenness and unevenness of the concrete surface C4 can be eliminated.

  Here, the rolling device 30 will be described with reference to FIGS. 5 and 6. In addition, in the rolling compactor 30, about the part which has the structure and function which are common in the floor surface construction apparatus 10 mentioned above, the code | symbol same as the code | symbol in FIG. 1 is attached | subjected and description is abbreviate | omitted.

  As shown in FIGS. 5 and 6, the rolling device 30 includes a brush 18 that slidably contacts the concrete surface C <b> 4 before the pressure rollers 11 to 13 roll and a pressure roller 11 to 13. And a flat finishing rod 17 slidably contacting the concrete surface C5 after passing through the rolling. The brush 18 crushes the latency 54 of the concrete surface C4, sweeps it into the groove 53, diffuses the reinforcing agent 56 and the modifier 55, and sweeps it into the groove 53. 17 has the effect | action which smoothes the concrete surface C5 after the pressure rollers 11-13 pass rolling.

  Here, the structure of the compaction device 30 will be described. A reinforcing member 21 is attached in front of the front member 14 f of the holding member 14 in parallel with the front member 14 f via a plurality of hinges 20, and a finishing rod 17 is detachably attached along the reinforcing member 21. The finishing rod 17 can be rotated up and down around the hinge 20 together with the reinforcing member 21, and the front member 14 f of the holding member 14 and the reinforcing member 21 are connected by an inverted V-shaped link mechanism 23. A proximal end portion of the operation wire 25 whose distal end portion is locked to the link mechanism 23 is locked to an operation rod 24 provided on the operation handle 19.

  When the operating rod 24 is moved back and forth along the cylinder 24s, the operating wire 25 enters and exits, whereby the finishing rod 17 rotates up and down around the hinge 20. When the operating rod 24 is set in front of the cylinder 24s, the finishing rod 17 descends and comes into contact with the concrete surface. After the operating rod 24 is pulled rearward along the cylinder 24s, the operating rod 24 is tilted to the right side and When the base end portion is fitted into the bay portion 24b of the cylinder 24s, the finishing rod 17 is raised and locked in a state of being separated from the concrete surface.

  By changing the type and number of the weights 22, the pressing force of the finishing rod 17 against the concrete surface can be adjusted. Since the finishing rod 17 is formed of an elastically deformable metal plate, the finishing rod 17 can press the floor surface elastically according to the weight of the weight 22. It is also possible to employ a mechanism that does not use the weight 22 but generates the pressing force of the finishing rod 17 by the wire pulling means provided on the operation handle 19.

  As shown in FIG. 6, if the rolling compactor 30 is brought on the concrete surface C4 on which the reinforcing agent 56 and the modifier 55 are dispersed, and the operator holds the operation handle 19 and pulls it backward (in the direction of the arrow R1). The entire surface of the compaction device 30 is moved while the pressure rollers 11 to 13 are rolling, and the plurality of pressure rollers 11 to 13 are sequentially rolled on the concrete surface C4. It is canceled and leveled. Moreover, since the surface layer part of the concrete surface C4 is strongly compacted by the pressurizing action of the plurality of pressure rollers 11 to 13 and voids in the concrete can be eliminated, the occurrence of cracks after the concrete is solidified can be prevented. it can.

  Although the rolling device 30 includes three pressure rollers 11 to 13, the number of pressure rollers is not particularly limited, and can be arbitrarily set according to construction conditions. In consideration of transportability, storage property, etc., about 3 to 5 are preferable.

  The brush 18 slides on the concrete surface C4 before the pressure rollers 11 to 13 roll, so that the latency 54 on the concrete surface C4 is crushed and diffused or the unevenness of the concrete surface C4 is eliminated. Can do. Note that the brush 18 is disposed in front of the holding member 14 (for example, between the front material 14f and the finishing rod 17), and the brush 18 slides on the concrete surface C5 after the pressure rollers 11 to 13 roll. It can also be set as the structure which contacts as possible. In addition, since the brush 18 can be attached to and detached from the holding member 14, it can also be removed according to the work situation.

  Since the rolling device 30 includes the finishing rod 17 that slidably contacts the concrete surface C5 after the pressure rollers 11 to 13 roll, the unevenness is eliminated by the pressure rollers 11 to 13. The concrete surface C5 is further smoothed by the sliding motion of the finishing rod 17 that slides along the concrete surface C5. When the finishing rod 17 moves in the direction of the arrow R1, the concrete surface C5 is pressed by the pressing force of the weight 22, but the finishing rod 17 is rotatable around the hinge 20, The concrete surface C5 can be finished without being affected by the vibration and swinging of the holding member 14.

  Note that the compaction device 30 presses the concrete surface C4 only by manual operation. However, the compaction device 40 including the power oscillation means 16 as shown in FIG. It is also possible to perform a pressing operation on the concrete surface C4 while vigorously vibrating .about.13.

  As shown in FIG. 7, the compaction device 40 has a structure in which the oscillating means 16 is provided on the connecting member 15 of the compaction device 30. The oscillating means 16 includes a prime mover 16e, a vibration generator 16b, and a belt 16v that transmits the rotational force of the prime mover 16e to the vibration generator 16b. Vibration is generated by rotating an eccentric rotating body (not shown) built in the vibration generator 16b by driving the prime mover 16e.

  The operation handle 19 is provided with a throttle lever 16t that increases or decreases the output rotational speed of the prime mover 16e, and the vibration output of the vibration generator 16b can be adjusted by operating the throttle lever 16t. The connecting member 15 is formed of a metal plate having a thickness of about 2 to 5 mm having a substantially U-shaped cross section in the front-rear direction (the rolling direction of the pressure rollers 11 to 13), and the vibration is generated by the oscillation means 16. The connecting member 15 has a material and a shape that easily resonate. Since the structure and function of other parts are the same as those of the compaction device 30, the same reference numerals as those in FIG.

  Similar to the compaction device 30 shown in FIG. 5, the compaction device 40 is brought onto the concrete surface C4 to operate the oscillating means 16, and the throttle lever 16t (see FIG. 7) is adjusted to cause the vibration member 15 to have its natural vibration. The vibration member 15 resonates and vibrates violently, and this vibration is transmitted from the left and right side members 14s of the holding member 14 through the bearings 11a, 12a, 13a and the support shafts 11s, 12s, 13s. , 12 and 13.

  As a result, the pressure rollers 11 to 13 are also vibrated vigorously. However, since the rolling device 40 is held without sinking on the concrete surface C4, the operator holds the operation handle 19 and pulls it backward. For example, the entire pressure roller 40 moves backward while the pressure rollers 11 to 13 rotate. Note that when the throttle lever 16t is operated to increase or decrease the rotational speed of the prime mover 16e, the vibration member 15 vibrates vigorously (the set position of the throttle lever 16t), so the connecting member 15 is easily set to the resonance state. be able to.

  Unevenness of the concrete surface C4 is eliminated and smoothed by vigorous vibration and pressure action of the plurality of pressure rollers 11 to 13 that roll and pass sequentially on the concrete surface C4. In addition, the surface layer portion of the concrete surface C4 is strongly compacted by the vibration and pressure action of the plurality of pressure rollers 11 to 13, and the voids in the concrete also disappear. Therefore, it is possible to prevent the occurrence of cracks after solidification of the concrete. it can.

  It should be noted that a surface leveling device having a leveling plate that vibrates with power in place of or before or after the pressing operation by the rolling device 30 shown in FIG. 5 or the rolling device 40 shown in FIG. It is also possible to perform leveling work using. The surface leveling device is not limited, but, for example, a leveling plate that can slide on the surface of the concrete before curing, and a shaft that is rotatably supported on the leveling plate to vibrate and resonate the leveling plate. An eccentric rotating body, a prime mover mounted on the leveling plate at a position away from the eccentric rotating body, a belt for transmitting the rotation of the prime mover to the eccentric body, and an operation attached to the leveling plate It is desirable to use a surface leveling device with a handle.

  After the pressurizing operation by the rolling device 30 shown in FIG. 5 or the rolling device 40 shown in FIG. 7 or the leveling operation by the surface leveling device described above, the rotation that rotates in a propeller shape around the vertical axis is next performed. Using a floor surface construction machine (for example, an equipment called “trowell”) having a coffin and a prime mover that drives the vertical shaft, a pressure leveling operation is performed on the concrete surface.

  After the pressure leveling work by the floor surface construction machine (not shown) is finished, the concrete surface has an appropriate hardness (for example, only a slight footprint remains when an operator wears special footwear and enters the concrete surface) When the material is solidified, the finishing operation is performed using a floor finishing apparatus 50 as shown in FIG. The structure and function of the floor finishing apparatus 50 will be described later.

  As shown in FIG. 8, the floor finishing device 50 is brought on the concrete surface C 5 having an appropriate hardness, the prime mover 3 is started, the rotary rod 4 of the leveling machine 5 is rotated, and the finishing rod 8 An operator standing on the side of the operating handle 9 in a posture facing away from the operator retreats while holding the operating handle 9 with both hands, so that the rotating surface 4 stays ahead of the finishing surface 8 and the floor surface finishing device is maintained. The entire 50 is horizontally moved along the concrete surface C5 in the direction of the arrow R2. As a result, the pressure leveling of the concrete surface C5 is performed by the rotating rod 4 that moves on the concrete surface C5 while rotating, and then the finishing rod 8 that slides on the concrete surface C6 is followed. Final finishing is performed.

  When the final finishing operation by the floor finishing apparatus 50 is completed, an extremely dense hardened layer is formed on the surface portion of the concrete as the concrete hardens, so that the surface does not become brittle or peel off after solidification. A concrete floor can be obtained.

  In the present embodiment, the concrete surface C1 is roughened by providing a step of roughening the concrete surface C1 before solidification with the floor construction apparatus 10 before the reinforcing agent 56 and the modifier 55 are sprayed. Since the reinforcing agent 56 and the modifier 55 flow into the portion (groove 53) and penetrate to a portion deeper than the concrete surface C1, the thickness of the hardened layer can be increased. Note that the step of spraying the modifier 55 shown in FIG. 4 may be omitted, and the steps after the pressurizing step shown in FIG. 6 may be performed after the step of spraying the reinforcing agent 56 shown in FIG.

  As shown in FIG. 1, the concrete surface C1 before solidification is roughened by scratching with a plurality of harder claws 51 to thereby form a lamellar layer-like latency 54 existing on the concrete surface C1 before solidification. Since it can be divided and crushed, the permeability of the reinforcing agent 56 and the modifier 55 is increased, which is effective for improving the strength of the cured layer. In addition, since the method of roughening the concrete surface C1 before solidification is not limited, the concrete surface C1 is roughened by using a brush, a brush, a comb-like tool, or a rotating brush in addition to the floor surface construction apparatus 10 shown in FIG. It is also possible to obtain the same effect as described above.

  Further, by pressing the concrete surface C3 on which the reinforcing agent 56 and the modifying agent 55 are sprayed with the rolling device 30 (or 40), the permeability of the reinforcing agent 56 and the modifying agent 55 to the concrete surface before solidification is increased. Since the voids remaining in the concrete can be eliminated, an extremely high strength hardened layer can be formed. Furthermore, since the surface layer portion of the concrete is compacted and densified by the pressure applied by the pressure rollers 11 to 13, it is effective for improving the strength of the hardened layer and can eliminate unevenness and unevenness of the concrete surface C3. it can.

  In the present embodiment, the reinforcing agent 56 containing a powdered metal aggregate is used, and the modifier 55 containing a polyacrylic acid ester emulsion is used. A dense and extremely hardened cured layer could be formed. Moreover, in the floor surface structure formed by the floor surface construction method described above, a hardened layer having a thickness of about 1 mm to 30 mm in which the reinforcing agent 56 and the modifier 55 are mixed is formed on the surface layer portion of the concrete floor surface. I was able to. The reinforcing agent 56 may be one containing powdered ceramic aggregate or natural mineral aggregate, and the modifier 55 is a polymer dispersion such as ethylene vinyl acetate or styrene butadiene rubber latex. It is also possible to use those containing one or more of the above, and the same effects as described above can be obtained.

  Next, the floor finishing apparatus 50 will be described with reference to FIG. As shown in FIG. 8, the floor finishing apparatus 1 includes a plane leveling machine 5 having a plurality of rotary rods 4 that rotate in a propeller shape by the driving force of the prime mover 3 while contacting the concrete surface C5, and the plane leveling machine. In a state of being connected to the machine 5 via the connecting mechanism 6, a flat finishing rod 8 is provided which is disposed in a part of the outer peripheral area of the rotating surface of the rotating rod 4. An operation handle 9 for an operator to operate the floor finishing device 1 is provided at a position opposite to the finishing bar 8 of the leveling machine 5. In the following description, the expressions “front”, “rear”, “left”, “right”, “upper”, and “lower” stand on the operation handle 9 side of the floor finishing apparatus 1 and finish 8 is based on a worker who has taken a work posture standing toward 8.

  An inverted L-shaped column 31 is erected on the front portion of the prime mover 3 of the plane leveling machine 5, and hooks 32 are provided at two locations above and below the vertical portion of the column 31. The vertical portion of the column 31 is arranged so as to be parallel to the rotational axis Y of the rotary rod 4. By hooking the hook 32 with locking holes (not shown) of a locking tool 6b fixed at two locations above and below the vertical support shaft 6a of the coupling mechanism 6, the finishing rod 8 is flattened via the coupling mechanism 6. It is connected to the leveling machine 5.

  The coupling mechanism 6 includes a vertical support shaft 6a, an upper support member 6d extending obliquely upward from the upper end portion of the vertical support shaft 6a, and a lower support member extending obliquely downward from the lower end portion of the vertical support shaft 6a. 6e, a connecting member 6f disposed between the upper support member 6d and the lower support member 6e, and a pivotal support pivotally supported by a distal end portion of the lower support member 6e via a horizontal locking pin 6g. The elevating arm 6h, a horizontal support shaft 6i inserted through the tip of the elevating arm 6h in a direction perpendicular to the elevating arm 6h, a reinforcing member 6k rotatably attached to the horizontal support shaft 6i, and the like. .

  On the front surface of the reinforcing member 6k, a finishing rod 8 having a rectangular shape, which is formed of an elastically deformable plate and is long in the left-right direction, is detachably attached via an L-shaped fixing member 33 and a plurality of bolts. ing. A weight 34 for applying a pressing force to the concrete surface C6 to the finishing rod 8 is connected to the reinforcing member 6k. Further, a wire 36 and an operation handle 35 for raising and lowering the lifting arm 6h and the finishing rod 8 are provided around the locking pin 6g.

  As described above, the engine 3 is started, the rotary leveling machine 4 of the leveling machine 5 is rotated, and an operator standing on the side of the operating handle 9 in a posture facing the finishing bar 8 holds the operating handle 9 with both hands. If the entire floor finishing device 30 is moved horizontally in the direction of the arrow R2 along the concrete surface C5 by retreating while gripping, the concrete surface C5 by the rotating rod 4 moving on the concrete surface C5 while rotating. And the final finishing operation with the finishing rod 8 sliding on the concrete surface C6 can be performed continuously.

  The floor construction technique of the present invention can be widely used in construction sites for concrete floors such as reinforced concrete structures and structures.

DESCRIPTION OF SYMBOLS 10 Floor surface construction apparatus 30,40 Rolling apparatus 50 Floor surface finishing apparatus 51 Claw material 52 Rake member 53 Groove 54 Latency 55 Concrete modifier 56 Concrete reinforcement agent C1, C2, C3, C4, C5, C6 Concrete surface

Claims (8)

  A floor surface construction method comprising a step of roughening a concrete surface before solidification, a step of distributing a concrete reinforcing agent to the roughened concrete surface, and a step of pressing the concrete surface to which the concrete reinforcing agent is dispersed. .   A step of roughening the concrete surface before solidification, a step of distributing a concrete reinforcing agent to the roughened concrete surface, a step of spraying a concrete modifier on the concrete surface to which the concrete reinforcing agent is sprayed, and A floor surface construction method comprising a step of pressurizing a concrete surface on which a concrete modifier is sprayed.   The floor construction method according to claim 1 or 2, wherein the surface of the concrete before solidification is roughened by scratching with a harder member.   The floor construction method according to claim 1 or 2, wherein the surface is roughened by pressing a harder member against the concrete surface before solidification.   The floor construction method in any one of Claims 1-4 which pressurize the concrete surface after the said concrete reinforcement agent or the said concrete modifier is sprayed with a roller-type rolling compactor.   The floor construction method according to any one of claims 1 to 5, wherein the concrete reinforcing agent contains powdered metal aggregate.   The floor surface according to any one of claims 2 to 6, wherein the concrete modifier contains one or a plurality of polymer dispersions of ethylene vinyl acetate, polyacrylic acid ester, and styrene butadiene rubber (SBR) latex. Construction method.   A floor surface structure comprising a hardened layer in which a concrete reinforcing agent is mixed or a hardened layer in which a concrete reinforcing agent and a concrete modifier colorant are mixed in a surface layer portion of the concrete floor surface.

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